This sample tends to break into cubes and is not extremely hard, perhaps just slightly harder than or as hard as a fingernail.
What is meant by sample?In contrast to the statistical definition, which refers to a collection of such values, a sample is a value of the signal at a particular moment in time and/or location.The number of samples per second (or per other unit) taken from a continuous signal to create a discrete or digital signal is known as the sampling rate or sampling frequency. A sample is a portion of continuous time-domain data that has been taken from the entire dataset. When a source produces an analog signal, the signal must be discretized in time if it is to be converted to a digital signal consisting of 1s and 0s, or High or Low. Sampling is the term used to describe this discretization of the analog stream.To learn more about sample refer to:
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Galena is not very hard, maybe slightly harder than or as hard as a fingernail and seems to break into cubes.
What is the use of the mineral galena?The main source of lead is galena, which is frequently mined for its silver content. In ceramic glaze, it can serve as a source of lead.
Where can one find galena?Galena was designated as Missouri's official mineral in 1967. The Joplin-Granby region in southwest Missouri, which is a part of the Tri-State Mining District, saw a boom in galena mining. Crawford, Washington, Iron, and Reynolds Counties all have rich deposits.
Galena is it light or heavy?Galena is lead sulfide with a specific gravity of 7.4 to 7.6 and a Moh's hardness of 2.5, making it actually rather soft. However, it is VERY heavy. It weighs roughly 700 pounds per cubic foot, for comparison.
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The heat of fusion of a substance is 42. 5 J/g. How much energy is released when 40 g of this substance at its freezing point completely changes into a solid? Show your work.
A. ) 1. 700
B. ) 1. 06
C. ) 42. 5
D. ) 0 J
The heat energy of the substance option (A) -1700J is correct.
We are given that,
Heat of fusion of a substance = ΔHf = 42.5J/g
Mass of the substance = m= 40g
The latent heat of fusion is the quantity of heat required to transform one gramme of a substance from a solid to a liquid. But in this case, it's important to figure out how much heat is released as liquid copper solidifies. So, ΔHf = -42.5 J/g
Thus , we have to calculated here the heat energy of the substance by the formula,
q = m·ΔHf
Where, q is heat energy ,m is mass ΔHf is the heat of fusion of a substance,
q = m·ΔHf
q = -42.5 J/g× 40g
q = -1700J
Therefore , the heat energy of the substance would be option (A) -1700J
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Obviously, everybody has different skill sets. The goal of this lesson is not to become an Olympic volleyball player. Instead, it is to learn/improve some basic volleyball skills. For this assessment, you should experiment with your passing, serving, and setting. (Perhaps the local YMCA has pick-up volleyball games in which you could participate.)
After you have practiced each of these three skills, respond to the following questions in writing, for each of the three skills. Your essay should be at least 200 words.
What did you find most challenging about mastering this skill? Why?
What did you find easiest about mastering this skill? Why?
clearly demonstrate that you understand the discreet steps of the skills;
specify individual steps that you found both challenging and easy;
demonstrate your ability to effectively reflect on your own athletic abilities; and
be at least one paragraph,
'What did you find most challenging about mastering this skill?'
Ahh- What I found most challenging about the passing skill is hitting the ball the right direction. The last time I tried to pass the ball it hit someone in the face. But when I got a hang of it, It was easy until middle game. I tried to hit the ball and I faceplanted into the bar..-
'What did you find easiest about mastering this skill?'
The easiest? Well for me, nothing was easy. I couldn't even serve the ball without hitting it thw wrong direction!! I can't serve or pass a ball without it going the wrong direction or the ball hitting someone in the face! It gotten easier and easier as the game went particuallarly well. My team did end up winning thanks to one of my teammates. I can't play volleyball well at all. It was easy in some cases but hard at the same time.
Hope this helps you! :)
Answer:
Explanation:
This is not exactly Physics but here you go:
What did you find most challenging about mastering this skill? Why?
Setting is the most challenging because it requires many different techniques. There is a designated setter in competition games exactly because it is the most challenging position. It also requires lot of practices with your teammates.
What did you find easiest about mastering this skill? Why?
Serving is the easiest because you literally have the ball in your hand when you serve. Now it is not as easy if you want to make a serve that is difficult to receive. When a player fails to serve, it is usually not because it is tough but rather the player is trying to make a hard or spinning serve.
I am not particularly athletic and above is from a little play time I have had with volley ball in high school.
the force exerted on the rope by the ceiling is in the _____ direction.
The force exerted on the rope by the ceiling is in the vertical direction. This means that the force is pushing straight down on the rope and is perpendicular to the plane of the ceiling.
The force exerted on the rope by the ceiling is the result of the gravity of the rope itself and the weight of any objects or materials that are attached to the rope.
In order for the force to remain in the vertical direction, the rope must be secured at the top of the ceiling and not allowed to move in any other direction. If the rope were to move in any other direction, the force exerted on the rope by the ceiling would no longer be in the vertical direction and the rope would no longer remain secure.
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Imagine you are an astronomer who recently discovered a new planet orbiting a distant star. Which set of characteristics would you use to classify this planet as an inner or terrestrial planet
The characteristics which I would suggest are the planet should be dense, solid and located near star.
All the eight planets of the solar system move around the sun in fixed paths. These paths are elongated. They are called orbits. Mercury is nearest to the sun. It takes only about 88 days to complete one round along its orbit.
Venus is considered as ‘Earth’s-twin’ because its size and shape are very much similar to that of the earth.
Till recently (August 2006), Pluto was also considered a planet. However, in a meeting of the International Astronomical Union, a decision was taken that Pluto like other celestial objects (Ceres, 2003 UB313) discovered in recent past may be called ‘dwarf planets.
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An electron is projected with an initial speed v0 = 1. 10106m/s into the uniform field between the parallel plates in the figure. Assume that the field between the plates is uniform and directed vertically downward, and that the field outside the plates is zero. The electron enters the field at a point midway between the plates.
(a)If the electron just misses the upper plate as it emerges from the field, find the magnitude of the electric field.
(B) suppose that in the figure, the electron is replaced by a proton with the same initial speed. Would the proton hit one of the plates?
(c) what would be the direction of proton's displacement? upward or downward?
(d) compare the paths traveled by the electron and the proton and explain the differences
The electron feels a force upward as it passes between the charged plates and narrowly avoids striking the top plate. It just misses the to plate by a small amount as it moves higher.
The explanation for the above answer:The proton will accelerate less and miss the plates since it is more massive. We once more utilise the kinematic equation to determine the vertical displacement when it occurs for the plates.
y=1/2at²=1/2eE/mp(1.25×10-8s)
² \s=2.73×10-6m
As stated in (b), the proton won't collide with one of the plates because, despite the fact that the electric force felt by the proton and the electrons is identical, the electric force produces a smaller acceleration than g, making it plausible to disregard gravity.
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What magnitude point charge (in C) creates a 16,000 N/C electric field at a distance of 0. 260 m?
C
How large (in N/C) is the field at 15. 0 m?
The magnitude of the point charge is 12.03 × 10⁻¹² C and the electric field at 15.0m is 4.63 × 10⁻² N/C.
A point charge creates a 16,000 N/C electric field at a distance equal to 0.260 m.
E = 16,000 N/C
r = 0.260 m
k = 8.99 × 10⁹
To calculate the point charge,
E = kq/r²
16000 = 8.99 × 10⁹ × q / (0.26)²
q = 16000 × 0.0676 / 8.99 × 10⁹
q = 10816 / 8.99 × 10⁹
q = 12.03 × 10⁻¹² C
When r= 15.0 m
E = kq/r²
E = 8.99 × 10⁹ × 12.03 × 10⁻¹² / (15)²
E = 0.4630 × 10⁻³
E = 4.63 × 10⁻² N/C
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Group 1 on the Periodic Table shares which characteristics?
A. They are all blue.
B. They react with other elements.
C. Almost all are metals.
D. Almost all are soft.
Answer:
b is your answer
Explanation:
Answer:
C
Explanation:
Group one elements share common characteristics. They are all soft, silver metals. Due to their low ionization energy, these metals have low melting points and are highly reactive. The reactivity of this family increases as you move down the table.
You are handed a pring that i 0. 400 m long. You hang the pring from a hook
on the ceiling and attach a 0. 750-kg ma to the other end of the pring. The
tretched pring length i 0. 450 m. What i the pring contant?
The spring constant with given length that stretches upto certain length and has specified mass has a spring constant that is calculated to be 147 N/m.
Given that,
Initial length of the spring = 0.400 m
Final length of the spring = 0.450 m
Change in length, Δx = 0.450 m - 0.400 m = 0.050 m
Mass of the hung object = 0.750 kg
Weight of the hung object, w = 0.750 × 9.8 N = 7.35 N
From Hooke's law it is said that, mathematically
Spring constant = Weight of the hung object/ change in length
Putting in the above given values into the equation, we have,
Spring constant = 7.35/0.050 = 147 N/m
The required spring constant is calculated to be 147 N/m.
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An object accelerates at a rate of 8 m/s² over a displacement of 9 m. If the object started with a velocity of 5 m/s, what is its final velocity?
Answer:
13 m/s
Explanation:
The computation of the final velocity is shown below;
We know that
v^2 = u^2 + 2as
Here v represent the final velocity
u denotes the initial velocity
a denotes the acceleration
And, s denotes the displacement
So, the final velocity is
v^2 = (5)^2 + 2(8)(9)
= sqrt(25 + 144)
= sqrt(169)
= 13 m/s
find the numerical value of the density of a nucleus of atomic number A
Answer:
(A)²
Explanation:
Atomic mass = density*volume of atom.
So, density of nucleus is in depend of mass number
d=
3
4
πr
3
Massno.
=
3
4
π×[1.3×10
−13
×A
1/3
]
3
A
=constant∗A
0
as R=R
0
A
1/3
(R
0
=1.1×10
−15
m)
The numerical value of the density of a nucleus of atomic number A is determined as 2.29 x 10¹⁷ kg/m³.
Density of the nucleus
The density of the nucleus of atomic number A is calculated as follows;
ρ = m/V
where;
m is mass of the atom = 1.66 x 10⁻²⁷ kgr is radius of the atom = 1.2 x 10⁻¹⁵ m[tex]\rho = \frac{m}{V} \\\\\rho = \frac{m}{\frac{4}{3} \pi r^3} \\\\\rho = \frac{1.66 \times 10^{-27}}{\frac{4}{3} \pi (1.2 \times 10^{-15})^3} \\\\\rho = 2.29 \times 10^{17} \ kg/m^3[/tex]
Thus, the numerical value of the density of a nucleus of atomic number A is determined as 2.29 x 10¹⁷ kg/m³.
The complete question is below:
find the numerical value of the density of a nucleus of atomic number A with a radius of 1.2 x 10⁻¹⁵ m and mass of 1.66 x 10⁻²⁷ kg.
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two objects gravitationally attract with a force of 36 N if the distance between the two objects centers is decreased by a factor of threee then the new force of attraction is
The new force of attraction is 324N if the distance between the centres of the two objects is reduced by a factor of 3e.
The equation for the force of gravitational attraction between two objects is: F = G*(m1*m2)/r^2 Where F is the force of attraction, G is the gravitational constant (6.67 x 10^-11 Nm^2/kg^2), m1 and m2 are the masses of the two objects, and r is the distance between their centers. If the distance between the two objects' centers is decreased by a factor of three, the new force of attraction will be: F' = G*(m1*m2)/(r/3)^2The ratio of the new force of attraction to the original force of attraction is:
F'/F = (r/3)^2 If we substitute in the original force of attraction, we have:
F'/36 = (r/3)^2 = F' = 36 * (r/3)^2
As we decrease the distance by a factor of 3, the new force of attraction will increase by a factor of 9.
F' = 36*9 = 324 N
Therefore, the new force of attraction is 324 N.
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A 1.65-kg mass stretches a vertical spring 0.215 m. If the spring is stretched an additional 0.130 m and released, how long does it take to reach the (new) equilibrium position again
The time it takes for the mass to reach the new equilibrium position is approximately 0.15 seconds.
To calculate the time it takes for the mass to reach the new equilibrium position, you will need to know the spring constant of the spring. The spring constant, denoted by the letter k, is a measure of the spring's stiffness, and it is related to the force required to stretch the spring by a certain distance. If the spring constant is not given, it can not be calculated.
Once you have the spring constant, you can use the equation:
T = 2π √(m/k) where,
T is the period of oscillation (the time it takes for the mass to complete one full cycle of motion) m is the mass of the object attached to the spring k is the spring constant.The spring constant (k) can be found by using the equation:
F = kx where,
F is the force applied to the spring x is the distance the spring is stretched from its equilibrium position, and k is the spring constant.In this case, the force is equal to the weight of the mass, which is m*g, where m is the mass and g is the acceleration due to gravity.
mg = kx
or, k = (m*g)/x
or, k = (1.65 kg * 9.8 m/s^2) / 0.215 m = 74.65 kg/s^2
Now that we know the spring constant, we can use the equation:
T = 2π √(m/k)
To find the time it takes for the mass to reach the new equilibrium position, where T is the period of oscillation, m is the mass of the object attached to the spring, and k is the spring constant.
T = 2π √(1.65 kg / 74.65 kg/s^2) = 0.15 sec
So the time it takes for the mass to reach the new equilibrium position is approximately 0.15 seconds.
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a child swings on a playground swing with a 2.5 m long chain. what is the period of the child's motion. what is the frequency of the vibration
The period of the child's motion is 3.171 seconds. The frequency of the vibration is 0.315 Hz.
The time period is 3.171 seconds.
2 × [tex]\pi[/tex] [tex]\frac{L}{g} ^{\frac{1}{2} }[/tex]
= 3.171 seconds
The frequency is the reciprocal of the time period.
f = 1 ÷ 3.171
= 0.315Hz
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what is rotation in your own words. and you have to be detailed
Answer:
The action of rotating around something like for ex.. Child A stands in the middle of a room while Child B goes around Child A, Child B is rotating around Child A. Another ex. is; The earth rotates around the sun every 365 days the earth is rotating or going around the sun in a circle. So rotating to me is the act of rotating around something in any way shape or form.
PS: A middle schooler answered this so if you don't wanna believe me or think I'm wrong because I am younger you do you.
An electron is located 1 meter from a +2 Coulomb charge, as shown below. The electrostatic force acting on the electron is directed toward which point?
Answer: point D
Explanation:
what is the reading of the energy meter in figure 1 when an appropriate laser is used in pac to dissociate a particular chemical bond?
Because alkylbenzenes, phenols, and thiophenols all share an aromatic hydrocarbon constituent, the answer to this question is A.
Compounds 1 and 2 are both used to create liposomes, and their kinetics are controlled. Compound 1 are controlled kinetically, whereas those made from Compound 2 are controlled thermodynamically. UV lasers like nitrogen lasers (337 nm) and frequency-tripled and quadrupled Nd:YAG lasers are frequently used in MALDI methods (355 nm and 266 nm respectively). An artificial substrate for lactase is hydrolyzed to extract lactase from dietary supplement tablets, which is then measured using a colorimetric assay (ortho-nitrophenol-beta-D-galactopyranoside, ONPG). Because alkylbenzenes, phenols, and thiophenols all share an aromatic hydrocarbon constituent, the answer to this question is A.
The complete question is- What is the reading of the energy meter in Figure 1 when an appropriate laser is used in PAC to dissociate a particular chemical bond?
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A 31.7 kg kid initially at rest slides down a frictionless water slide at 53.2 degrees, how fast is she moving in 3.45 s later?
Answer:
34.55 m/s
Explanation:
draw the standing wave if the tension is quadrupled while the frequency is held constant
The diagram for the standing wave after the tension is quadrupled while the frequency is held constant has been attached and explained below.
We already know that the frequency of a standing wave is given by,
= f = nv/2l
and
= v = [tex]\sqrt{\frac{T}{m} }[/tex]
In the given problem, the frequency of the wave after the tension is quadrupled will be -
= f2 = 2v/2l
= f2 = v/l
= f2 = 1/l [tex]\sqrt{\frac{T}{m} }[/tex]
Now, since we have quadrupled the tension, we have -
= f = 1/l [tex]\sqrt{\frac{4T}{m} }[/tex]
= f = 2(f2)
So, now we know that the final frequency will be of this form(the image has been attached here) and it would look like this if the tension is quadrupled while the frequency is held constant.
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what is an example of an event that can compromise an ecosystem?
A. Rivers flooding the Amazon basin in south America
B. Ocean currents cooling the gulf stream
C. Solar storms hitting earths magnetosphere
D. Global warming melting summer ice floes in the arctic
The one option that specifically connects to an environment is option D: Global warming melting summer ice floes in the Arctic. All of the other alternatives have the potential to harm ecosystems.
The Arctic ecology may be significantly impacted by the melting of summer ice floes as a result of global warming. Many species, including polar bears, seals, walruses, and other bird species, are dependent on the ice for their existence in the Arctic environment since it has been specially adapted to the presence of sea ice.
The habitats and food sources of these animals are disrupted as the ice floes melt. It may result in fewer hunting areas being accessible, change marine animals' reproductive cycles, and have an effect on the entire food chain in the Arctic ecosystem.
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Answer:
D. Global warming melting summer ice floes in the arctic
Explanation:
In the above situation, what is the net torque on wire 2 due to wire 1?
a. Up b. Down
c. Into the screen d. Out of the screen e. Zero
In the above situation the net torque on wire 2 due to wire 1 is Zero.
Which way is the force acting on the wire?Fleming's left-hand rule identifies the force's direction on a current-carrying wire when it is placed in a magnetic field. It always runs counter to how the magnetic field and electric current are moving.
Directional torque: what is it?Torque is a vector quantity by definition. The direction is determined as part of the torque computation. The direction is parallel to both the force and the radius from the axis. It is customary to choose it along the rotational axis in the right-hand rule direction.
When rotating clockwise, is torque negative?a force that is applied that results in a positive counterclockwise torque A negative torque rotates an object in a clockwise direction.
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When a chemical reaction occurs in a sealed container, what is the total mass after the reaction compared to the total mass before the reaction? A.
the same
B.
less
C.
more
D.
variable
The statement of the total mass after the reaction is "the same."
What is a chemical reaction?When one or more chemicals are transformed into one or more other compounds, a chemical reaction occurs.
What is mass?A substance is something to do with mass that takes up space. The mass of a compound is the total amount of atoms present in grams that make up a molecule. The grams is the unit of mass.
The principle which implies that the mass of matter in a closed system will remain constant regardless of the type of change that occurs. The amount of mass will not change whether it is due to a change in condition, dissolving, a chemical reaction, or any combination of these. Because the number of each type of atom remains constant, the mass will remain constant.
Hence the correct answer is A.
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While vacationing in the mountains you do some hiking. In the morning, your displacement is S⃗ morning= (2100 m , east) + (3000 m north) + (200 m , vertical). Continuing on your hike after lunch, your displacement is S⃗ afternoon= (1400 m , west) + (2900 m , north) - (400 m , vertical). What is the magnitude of your net displacement for the day?
The magnitude of the net displacement for the day depends on the total distance traveled and the direction in which traveled.
What do you mean by Magnitude?
Magnitude is a measure of the size or intensity of a physical quantity. It is typically expressed in terms of a numerical value and a unit. Examples of physical quantities with magnitude include speed, acceleration, force, energy, pressure, and power. Magnitude is a measure of the size or intensity of a physical quantity, and is typically expressed in terms of a numerical value and a unit.
Step 1: Find the resultant displacement vector by adding the vectors.
S total = S morning + S afternoon
= (2100 m , east) + (3000 m north) + (200 m , vertical) + (1400 m , west) + (2900 m , north) - (400 m , vertical)
Step 2: Simplify the vector.
S total = (700 m , east) + (5900 m , north) - (200 m , vertical)
Step 3: Calculate the magnitude of the resultant vector.
|S total | = √(700 m)^2 + (5900 m)^2 + (-200 m)^2
|S total | = √(490000 m^2 + 348400 m^2 + 40000 m^2)
|S total | = √(882400 m^2)
|S total | = 939.4 m
Hence, the magnitude of the net displacement is 939.4 m.
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N a circuit, when the two conductors leading from the power source touch metal-to-metal, this is called a _____ circuit
In a circuit, when the two conductors leading from the power source touch metal-to-metal, this is called a short circuit
Types of short circuitThere are two types of short circuits, short-to-power and short-to-ground, where electricity takes an unintentional shortcut without going through the intended sensor or actuator.
Short to ground - When there is a short to ground, it refers to the current flowing from the circuit to the car body. Wires can tear and strip their insulation, contacting the body or engine. A short path to ground can result in blown fuses, malfunctioning lights or motors, or “missing” sensors. For example, a scuffed wire might be short to ground, which could cause the headlight fuse to blow, protecting the circuit from overheating, but killing the headlights. Short power - In a wire harness, with many circuits in close proximity, there is a possibility of a short power fault. In this case, wires that are wound or cut can interconnect with each other, allowing current to flow where it is not intended. For example, someone installing an aftermarket device might push a screw through a wire harness, accidentally puncturing and "connecting" some of the wires. Turning on the headlights might send current into the horn, or hitting the brakes might illuminate the taillights.Learn more about short circuit at https://brainly.com/question/18207608.
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If we decided to make the length of one day equal to the time that it took the earth to complete a single revolution about its axis, what would change?
Our days would be a little bit shorter, and as a result, the sun would rise and set each day at later and later hours.
How long does it take the Earth to make a full rotation?Another method to determine how long a day is is to time how long it takes a planet to complete one full spin. A sidereal day is what is being described here. On Earth, a sidereal day is almost exactly 23 hours and 56 minutes long. The sidereal day occurs after every 360-degree rotation of the Earth. It takes 23 hours, 56 minutes to do that. When Earth rotates slightly more and the sun is at the same location in the sky as it was 24 hours earlier, the solar day—the one that people count in the calendar—occurs.
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A baseball player throws a ball giving it a change in momentum of 6. 5
kg. M
over 90 ms.
S
What is the magnitude of the net force on the ball?
A baseball player throws a ball which has a certain change in momentum. The magnitude of the net force on the ball is 72.22 N.
Given that,
Change in momentum Δp = 6.5 kg m/s
Time t = 90 ms = 90 × 10⁻³ s
Change in momentum can be written as,
Δp = m Δv = F×t
As we need net force on the ball,
Δp = F×t
Making F as subject and putting the values we have,
F = Δp/t = 6.5/(90 × 10⁻³) = 72.22 N
Thus, the required net force on the ball is calculated to be 72.22 N.
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A person pushes a book against a wall so that the book does not move. a. Draw a free-body diagram for the book. Label the forces as you did in the tutorial Forces. b. For each force that appears on your free-body diagram, identify the corresponding force that completes the Newton's third law (or action-reaction) force pair.
For the circuit shown in the figure, what is the current through resistor R1? A) 0.071 A
B) 0.13 A
C) 0.029 A
D) 0.016 A
For the circuit shown in the figure, 0.071 A is the current through resistor R1.
What is circuit ?
Circuit is an electrical network consisting of interconnected components that allow electricity to flow through it. It is used to control, regulate, and direct the flow of electricity in order to perform a specific task. A circuit is composed of wires, resistors, transistors, capacitors, and other components which are connected together in order to form a complete system. This system can be used to control a variety of electrical devices, such as lights, motors, and computers. Circuits can be used to create a wide range of applications, from simple household appliances to complex industrial machines.
The current through R1 can be calculated using Ohm's Law:
I = V/R = (9V)/(120Ω) = 0.075 A
Therefore, the answer is A) 0.071 A.
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How do you calculate the fall of a ramp?
The fall of the ramp can be calculated by the falling style of the ramp. like if the ramp is falling in the rolling motion, then we can calculate the fall of the ramp by the process by which we calculate of the rolling motion of any object.
Rolling motion happens when an object roll over from a ramp or any other sloppy surface whether it is rough or smooth. many forces act on it at the same moment. also in many forces rolling tangential force and gravitational force is also acting on it at the same moment. in which the gravitational force is acting on it at a bigger pace and plays an important role in rolling of the object from the ramp or any other sloppy surface. hence, by this information we can firmly consider that a heavier object go down a ramp at a same pace as a lighter object go down a ramp because of gravitational force acting on it in a major form.
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Why is copper wire a better conductor of electricity than carbon fiber? (1 point)
A) Carbon (C) does not have any valence electrons.
B) Copper (Cu) is a metal, and only metals can conduct electricity.
C) The electrons in copper (Cu) are loosely bound to the nucleus.
D) Copper (Cu) has no loose electrons.
The copper wire a better conductor of electricity than carbon fiber because copper (Cu) is a metal, and only metals can conduct electricity option - B is correct answer.
Why does copper behave better as an electrical conductor?A metal has greater electrical conductivity the lower its resistivity level. And copper wire is an excellent electrical conductor because it has a low level of resistivity. Incredibly flexible is another quality of copper.
Carbon fiber still does not conduct electricity as well as metal, even after being treated with other materials. Though still about 100 times faster than carbon fiber treated with good electricity conductors, metals like silver, aluminum, and copper are particularly good at conducting electricity.
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Answer:
1. The electrons in copper (Cu) are loosely bound to the nucleus. (C.)
2. An electrical current that flows in one direction (D.)
3. aluminum (Al) (D.)
4. Opposite charges attract one another. (D.)
5. Atoms with a nearly empty valence shell make good conductors. (C.)
Explanation:
I did the Connections Academy test (Conductors and Insulators Quick Check)
Why does acceleration increase down a ramp?
Acceleration increase down a ramp, due to an object is free to move under the influence of gravity. That's why acceleration increases.
Acceleration is a measure of how quickly an object's velocity changes. On a ramp, an object is free to move under the influence of gravity. The gravitational force acting on an object is always directed downward, and the force of friction acting on an object is directed upward. The force acting on an object moving down a ramp is the force of gravity minus the force of friction. Since the force of gravity is greater than the force of friction, the net force acting on the object is directed downward, which causes the object to accelerate downward. The angle of the ramp affects the force of friction, as the greater the angle of the ramp, the greater the force of friction, and the less the net force acting on the object and less acceleration. Therefore, acceleration increases down a ramp because the net force acting on an object is directed downward and the angle of the ramp affects the force of friction.
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