Answer:
Object stop moving when the force which is friction that acts to resist sliding between two touch-ing surfaces is not present
Answer:
See below ~
Explanation:
Newton's 1st Law of Motion : "An object in motion (or rest) will stay in motion (or rest) unless acted upon by an unbalanced force.
Objects stop moving due to the application of forceAn ball rolling on the road stops due to the frictional force of the roadAn apple falls from the tree due to gravitational forceWe can alter the motion of a football by applying force
Efficiency of a machine is always less than 100% why?
The reason the efficiency is always less than 100% is because there is always some sort of friction in the machine.
Answer: because of friction
The greatest variation in size, mass, and luminosity occurs in:.
The greatest variation in size, mass, and luminosity occurs in elliptical galaxies.
What is Variation?
This is defined as the difference from the norm which is exhibited by objects.
In the solar system, variation in features such as size, mass, and luminosity occurs mostly in elliptical galaxies due to presence of array of stars thereby making it the most appropriate choice.
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What are the answers for these?
Describe the difference between continuous reinforcement and intermittent reinforcement.
Answer:
Continuous reinforcement delivers the reinforcement every single time the target behavior is delivered. (For example, if the target behavior for the dog is sitting when the owner says "sit", the treat (reinforcement) would be given whenever the dog follows the command). It follows a schedule-like reinforcement.
Intermittent reinforcement delivers the reinforcement to responses but are not consistent.
Three liquids are at temperatures of 2°C, 21°C, and 34°C, respectively. Equal masses of the first two liquids are mixed, and the equilibrium temperature is 5 C. Equal masses of the second and third are then mixed, and the equilibrium temperature is 30.1°C.
Find the equilibrium temperature when equal masses of the first and
third are mixed.
Answer In units of 'C.
Answer:
m - mass of each liquids (all masses are equal )
C_1C 1 - specific heat of the first third C_2C 2 - specific heat of the second liquid
C_3C 3- specific heat of the third liquid
Temperature of liquids: T_1=7 ◦C,T_2=20◦C, T_3=34◦CT
1 =7◦C,T 2 =20◦C,T 3=34◦C
Temperature of 1+2 liquids mix: T_{12}=11^oCT
12 =11 oC
Temperature of 2+3 liquids mix: T_{23}=22.6^oCT
23=22.6 oC
Temperature of 1+3 liquids mix: T_{13} - ?T 13 −?
When the first two are mixed:
m C₁ (T₁ − T_{12}) + m C₂ (T₂ − T_{12}) = 0 \\ C₁ (7− 11) + C₂ (20 − 11) = 0\\ 4C_1=9C_2\\ C_1=2.25C_2mC₁(T₁−T 12)+mC₂(T₂−T 12 )=0C₁(7−11)+C₂(20−11)=04C \1=9C 2C 1 =2.25C 2
When the second and therd are mixed:
m C_2 (T_2 − T_{23}) + m C_3 (T_3 − T_{23}) = 0 \\ C_2 (20−22.6) + C₂ (34 −22.6) = 0\\ 2.6C_2=11.4C_3\\ C_2=4.38C_3mC 2 (T 2 −T 23 )+mC 3 (T 3 −T 23 )=0C 2(20−22.6)+C₂(34−22.6)=02.6C 2 =11.4C 3C2 =4.38C 3
When the first and therd are mixed:
m C_1 (T_1 − T_{13}) + m C_3 (T_3 − T_{13}) = 0 \\ C_1 (7−T_{13}) + C_3 (34 −T_{13}) = 0\\ C_1=2.25C_2=2.25(4.38C_3)=9.86C_3\\ 9.86C_3 (7−T_{13})=-C_3(34 −T_{13})\\ 9.86 (7−T_{13})=-(34 −T_{13})\\ T_{13}=9.5^oCmC 1(T1 −T13)+mC 3(T3−T13 )=0C1 (7−T13 )+C 3(34−T 13 )=0C1 =2.25C2=2.25(4.38C3 )=9.86C39.86C3 (7−T13 )=−C3(34−T13 )9.86(7−T13)=−(34−T13 )T13 =9.5 oCT_{13}=9.5^oCT 13 =9.5 o C:
A student slides a box across the floor to his friend. The mass of the box is 25 kg and the
coefficient of kinetic friction between the floor and the box is 0.52. If the initial velocity
of the box is 7.0 m/s, how far will the box slide before it stops?
The distance traveled by the box before stopping, when the student slides the box across the floor to his friend, at the given coefficient of kinetic friction is 4.8 m.
Acceleration of the boxThe acceleration of the box across the floor is determined by applying Newton's second law of motion.
∑F = ma
-Ff = ma
-μmg = ma
-μg = a
-(0.52 x 9.8) = a
- 5.1 m/s² = a
Distance traveled by the box before stoppingThe distance traveled by the box before it stops is calculated as follows;
v² = u² + 2as
where;
v is the final velocity of the box when it stops = 00 = (7)² + 2(-5.1)s
0 = 49 - 10.2s
10.2s = 49
s = 49/10.2
s = 4.8 m
Thus, the distance traveled by the box before it stops is 4.8 m.
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Because sound waves vibrate longitudinally, what can result?
A Disruptions of fixed waves
B. Changes in the density of air
C. Pressure differences where compressions are rarefied
D Regions of high pressure and low pressure
HELp!!!!!!!!
Answer:
I think its D.
Explanation:
I think this because sound waves move up and down im pretty sure but i might have that mixed with radio waves
find the resistance of the lamp if an electrical bulb is rated 60W,240v.
Answer:
[tex]R= 960 \: Ohm[/tex]
Explanation:
P = 60 W
V = 240 V
[tex]P= VI[/tex]
[tex]\implies I= \frac{P}{V}[/tex]
[tex]\implies I= \frac{60}{240}[/tex]
[tex]\implies I= 0.25 A[/tex]
Now, by Ohms law
[tex]R= \frac{V}{I}[/tex]
[tex]\implies R= \frac{240}{0.25}[/tex]
[tex]\implies R= 960 \: Ohm[/tex]
Answer:
960 Ω
Explanation:
Below is a nuclear equation. What number should go in the place marked (i)?
what is heat?
definition of heat
Answer: heat, energy that is transferred from one body to another as the result of a difference in temperature. If two bodies at different temperatures are brought together, energy is transferred—i.e., heat flows—from the hotter body to the colder.
Explanation:
Answer:
heat, energy that is transferred from one body to another as the result of a difference in temperature. If two bodies at different temperatures are brought together, energy is transferred—i.e., heat flows—from the hotter body to the colder.
Explanation:
Explain how a schematic of an electric circuit compares to an artist's drawing of the same circuit
The schematic of an electric circuit is clear and standardized while the artist drawing depicts a higher level of the features.
What is a Circuit?This can be defined as a path along which the whole current flows through each component.
The schematic shows the connections and components in an electrical circuit and how they are connected while the artist drawing shows how the features mentioned together with how they are arranged.
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Guys i need help rn
Needs a nice ans, thanks
Answer:
51.92 m
Explanation:
Given
angle at which it is launched (α) = 30°initial velocity (v₀) = 31.9 m/sFormula
Range (R) = [tex]\frac{v_{0}^{2} sin2\alpha }{g}[/tex]Solving for R
R = (31.9)² x sin2(30°) / 9.8R = 1017.61 x sin60° / 9.8R = 1017.61 / 19.6 [sin 60° = 1/2]R = 51.92 mDo you know it is scientifically impossible for bees to fly. yet bees fly.
Answer:
yes
Explanation:
but no i dont know anyways what is the question
Find the distance the ball traveled if it is 20.0n and it took 780 j to move it
39 m
Explanation:
W = FS
S = W/F
S = 780 J / 20 N
S = 39 Meters
Answer:
[tex]39m[/tex]
Explanation:
[tex]w = f \times s[/tex]
[tex]780 = 20 \times s[/tex]
[tex]s = 780 \div 20[/tex]
[tex]s = 39m[/tex]
100.0 grams of an isotope with a half-life of 36.0
hours is present at time zero. How much time will
have elapsed when 5.00 grams remains?
Answer:
155.6 hrs
Explanation:
5 = 100 (1/2)^n n = 4.32 half lives
4.32 * 36 = 155.6 hrs
The required, 155.58 hours will have elapsed when 5.00 grams of the isotope remains.
What is the half-life of the element?The half-life of the element is defined as the time span in which the element grows or decays half of its whole composition of growth and decay.
Here,
The decay of a radioactive substance can be modeled by the following equation,
[tex]N(t) = N_o (1/2)^{t/T}[/tex]
where N₀ is the initial quantity of the substance, N(t) is the quantity remaining after time t has elapsed, and T is the half-life of the substance.
In this problem, we are given,
N₀ = 100.0 g
N(t) = 5.00 g
T = 36.0 hours
We want to find the time t that has elapsed. Rearranging the equation above, we can solve for t,
t = T (log N₀ - log N(t)) / log 2
Substituting the given values, we get,
t = 36.0 hours x (log 100.0 - log 5.00 ) / log 2
t = 36.0 hours x 4.643 / 0.693
t = 155.58 hours
Therefore, approximately 155.58 hours will have elapsed when 5.00 grams of the isotope remains.
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How long will it take a car to accelerate from 20m/s to 26m/s at a rate of 1.4m/s2?
• 2.2 s
• 4.6 s
• 2.7 s
• 4.3 s
Answer:
4.3s
Explanation:
a=v-u/t
t=v-u/a
t=26-20/1.4=4.28
=4.3
HELP ME PLEASE!!!!
Do some research on digital vs. analog recording, and decide which you think gives the most accurate and best quality sound. State the advantages and disadvantages of each in a paragraph. Be sure to back up your opinions with facts, and state your sources.
Answer:
The question of analog vs. digital audio is one of the more hotly debated questions in the world of music, film, and media today. Does digital sound better? Does analog sound better? Is there even a noticeable difference?
It’s impossible to understand the difference completely without understanding what distinguishes analog audio from digital audio. A full discussion of these terms is best left to your curriculum and discussions with your mentor in the studio. For now, though, here’s a brief explanation of what these two words mean, and the differences between them.
Explanation:
I WILL MARK BRAINLIEST
EXPERIMENT: MIXTURES
OBJECTIVES
Utilize a filter to separate a mixture of sand and water.
Summarize your findings.
Many tasks in chemistry involve separating mixtures. For example, crude oil by itself has very few uses, but many important substances are separated from crude oil. In this investigation we will attempt to separate sand from salt water, and salt from water. If you do not have access to sand, you can use small pebbles or BBs.
Before you begin the experiment, hypothesize whether or not you can separate sand from salt water using filter paper. After the experiment summarize your findings in a scientific report. Upload your report below in question 1.
These supplies are needed:
salt
water
sand
a measuring cup
a balance
filter paper
funnel
plastic spoon
two beakers or glasses
Measure 5 grams of salt and 10 grams of sand using the balance.
Mix together the salt and sand in a beaker or glass.
Add one half-cup of water to the salt-sand mixture.
Stir the mixture with the plastic spoon until all the salt is completely dissolved.
To filter the mixture fold the filter in half to form a semi-circle. Fold it again which creates the shape of a triangle. Place the filter paper in the funnel and open one layer of the filter paper and spread it out onto one side of the funnel, and the other three layers onto the other side of the funnel. You may want to wet the filter paper with water so that the filter paper lays flat against the sides of the funnel. Carefully pour the salt water -sand mixture into the funnel and drain the liquid into a beaker or glass.
Remove the filter paper from the funnel and lay it out flat to allow the sand to dry.
Answer:
I found out that you could separate the sand because the filterstion and all the materials uses their elements to filter it out
Findings say that one could separate the sand using the filtration and all the materials uses their elements to filter it out.
What is filtration?Filtration is the technique of segregating the components from a mixture.
In the given experiment, the filter is used to separate a mixture of sand and water.
This experiment can be successfully completed through the filtration process.
Thus, one could separate the sand using the filtration and all the materials uses their elements to filter it out.
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Which plant group is one of the oldest on Earth?
daisies
ferns
sequoia trees
orange trees
Answer:
Ferns
Explanation:
Answer:
B
Explanation:
What would stars be like if carbon had the smallest mass per nuclear particle?.
What does ceteris paribus mean?
A. other things remain unequal
B. other things remain constant
C. other things remain irregular
D. other things remain unbalanced
Answer:
other things remain constant
Explanation:
Answer:
B) Other things remain constant.
Explanation:
For edmentum users.
Like diomedes and patroclus before him, achilles fights against a god during his aristeia in iliad books 20-22. Which god?.
The god that Achilles fought in the Illiad was the god Hector and he ended up killing him.
Who is achilles?He was a warrior that fought in the Trojan war. After the death of Patroclus. Achilles had to fighty the Trojan Army singlehandedly.
It was the war that saw the end of Hector and also he joined the war for the avenging of the death of Petroclus.
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It urgent ! A simple circuit consists of an unknown voltage source and a single 35. 0 Ω resistor. If the current in the circuit is measured to be 0. 257 A, what is the voltage in the circuit?
Answer:
9 v
Explanation:
v = i r
v = .257 * 35 = ~ 9 v
The ____________ is a phenomenon that occurs when electrons are ejected from a piece of metal after light has been shined onto the metal surface.
Answer:
Photoelectric Effect
Explanation:
Photoelectric Effect is a phenomenon in which electrically charged particles are released from or within a material when it absorbs electromagnetic radiation.
Each of the ____________ is specially positioned to detect angular acceleration in one of the three planes.
Each of the semicircular canals is especially positioned to detect angular acceleration in one of the three planes.
What is angular acceleration?Angular acceleration is defined as the pace of change of angular velocity concerning time.
Each of the semicircular canals is especially positioned to detect angular acceleration in one of the three planes.
The semicircular canals are biomechanical sensors that detect and encode angular motion of the head in three dimensions.
Hence semicircular canals are the correct answer for the blank.
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A spring with a spring constant of 5.25N/m applies a force of 8.50N when it is stretched. How much was the spring compressed?
Answer:
1.62
Explanation:
F = kx
8.5 = 5.25 * x
8.5/5.25 = 1.62
Does crystallization break down rocks at earths surface to form sediment
Answer:
No
Explanation:
Crystizaltion of magma turns into indeginous rocks which then turns into sediment after weathering and erosion.
Due to the cylindrical symmetry of this problem, the induced electric field E⃗ (R,t) can depend only on the distance R from the z axis, where R is restricted to the region outside the iron rod. Find this field. Express E⃗ (R,t) in terms of quantities given in the introduction (and constants), using the unit vectors in the cylindrical coordinate system, θ^, r^, and k^
It is to be noted that the electric field that has been induced is (-B₁ A/2[tex]\pi[/tex]R)θ. This is obtained by using the vector units in the Cylindrical Coordinate System.
What are Cylindrical Coordinates?Cylindrical Coordinates are simply defined as a component of a coordinate system that is used to locate a location in space using its polar coordinates and vertical distance from the polar plane.
How is the induced field arrived at?The formula for Induced Electric Field is given as:
∫ E · dl = ∈
If we replace ∈ with -B₁A and 2[tex]\pi[/tex]R for dl then
∫ E · dl = -B₁A. Thus, we can state that
E∫ dl = -B₁A
Replacing or substituting 2[tex]\pi[/tex]R for ∫ dl ·E(2πR) = - B₁A
We can thus rearrange the equation to read:
E · E = ([tex]\frac{-B1A}{2\pi R}[/tex])θ
It is to be noted that the circumference of a circle is the integral of the length of the element. While θ, which in this case is the unit vector refers to the Cylindrical Coordinate and the direction of the electric field.
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What type of circuit is shown
Answer:
electric circuit............
which grade
A force of 900 N is applied to a 9kg object. How fast will it accelerate?
Given :
Force = 900 NMass = 9kg[tex] \\ [/tex]
To find :
Acceleration = ?[tex] \\ [/tex]
We know :
[tex] \boxed{ \rm Force=Mass\times Acceleration}[/tex]
By using this formula we can find acceleration.
[tex] \dashrightarrow \sf Force=Mass\times Acceleration \\ [/tex]
[tex] \\ [/tex]
[tex] \dashrightarrow \sf900=9\times Acceleration \\ [/tex]
[tex] \\ [/tex]
[tex] \dashrightarrow \sf900 \times \dfrac{1}{9} =Acceleration \\ [/tex]
[tex] \\ [/tex]
[tex] \dashrightarrow \sf \cancel9 \times 100 \times \dfrac{1}{ \cancel9} =Acceleration \\ [/tex]
[tex] \\ [/tex]
[tex] \dashrightarrow \sf \dfrac{100}{1} =Acceleration \\ [/tex]
[tex] \\ [/tex]
[tex] \dashrightarrow \sf Acceleration = \dfrac{100}{1} \\ [/tex]
[tex] \\ [/tex]
[tex] \dashrightarrow \bf Acceleration = 100\: ms^{-2}[/tex]
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Related Concept :
Define Acceleration:
Acceleration is the rate by which velocity changes with respect to timeMain formula :-
a = (Vf - Vi)/t
where :-
Vf is final velocityVi is initial velocityt is timeDefine Force :
Force is a push or pull that changes or may tends to change an object from rest to motion or from motion to rest.Main formula:
f = m × a
where :-
m is massa is accelerationf is forceDefine Mass :
The amount of matter present in bodyMain formula:
m = v × d
where:-
m is massv is volumed is density