Answer:
Voyager 1 and 2
Explanation:
A wave along a guitar string has a frequency of 440 hz and the wavelength of 1. 25m. What is the speed of the wave?
Answer:
550 m/s
Explanation:
Speed of wave = wl * f wl = 1,25 m f = 440 Hz (given)
1.25 m * 440 = 550 m/s
what is the acceleration due to gravity on a planet with a mass 10 times that of earth, and a diameter 4 times that of earth
Answer:
gravity is changed by a factor of 10/16
Explanation:
gravitational force = m1 m2 G / r^2 now change the m1 and r
= 10 m1 m2 G/ (4 r)^2
= 10 /16 m1 m2 G / r^2
10 /16 the earth's gravity
The strength of the electric field 0.5 m from a 6 µc charge is n/c. (use k = 8.99 × 109 n•meters squared per coulomb squared and round answer to the nearest whole number.)
53....................................
Explanation:
5 (d) Assume that the power available to raise packages is constant. A package of mass greater than 36 kg is raised through the same height. Suggest and explain the effect of this increase in mass on the operation of the conveyer belt.
Answer:
Here is the answer for the question
Mass is increased and power is constant, so increase in potential energy of mass is also greater.
What is Potential energy?The labor required to move an object into a position is equated with the potential energy. For instance, if you were to pick up a book and set it down on a table.
Elastic When materials stretch or contract, elastic potential energy is stored. Spring, rubber band, and slingshot motions are a few examples of elastic potential energy.
Electric - The ability to perform labor depending on an object's electric charge is known as electric potential energy. Nuclear: The atom's internal particle potential energy. Chemical potential energy is the energy held in chemicals.
Therefore, Mass is increased and power is constant, so increase in potential energy of mass is also greater.
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A bicycle tire has a radius of .4m and a mass of 2.2Kg. What is the moment of inertia for the bicycle tire?
Answer:
0,352kg*m²
Explanation:
I=m*R²
i=2,2kg*0,4m*0,4m=0,352kg*m²
True or False
1. Conduction occurs only when molecules are in contact with each other.
2. Fast moving particles will take heat from slow moving particles.
3. Energy is carried in waves during conduction.
4. Conduction can transfer heat through space.
5. Warmer particles will give heat to cool particles.
6. During conduction, the movement of the molecules is important.
7. Light is a form of conduction heat transfer.
8. A carrier is needed for conduction to occur - something must carry the heat.
9. Fast moving particles will speed up slow moving particles.
#1
True#2
No it happens opposite as heat transfers from high to low
False#3
True#4
No it can't be happened in vaccum
False#5
True(Stated in no 2)#6
TrueFaster the movement faster the heat transfer
#7
Light particles get transferred from low to high (sun light)
True#8
True#9
FalseThe plasma membrane of a neuron has voltage-gated sodium and potassium channels. What is the effect of membrane depolarization on these channels?.
Answer:
Depolarization causes the Voltage-gated channels to open in order for ions to flow or rush in
A boy throws a ball vertically up. It returns the ground after seconds. Find the maximum height reached by the ball.
Answer:
If he throws the ball with speed V then (vertical speed)
V / g is the time to reach maximum height (V2 - V1) / a
The total time to again reach the ground is then
T = 2 V / g
H = 1/2 g t^2 where t = V / g
H = 1/2 g (V / g)^2 = V^2 / (2 g)
This is the familiar formula
V = (2 g H)^1/2 for the initial upwards speed
. The net force F acting on an object that moves along a straight line is given as a function of time t by 2 F t( ) = κt + τ , where 2 κ = 1 N s and τ = 1 N . What is the change in momentum of the object from t = 0 s to t = 3 s?
The change in the momentum of the object moving along a straight line is determined as 3 Ns.
Change in momentum of the object
The change in the momentum of the object is equal to impulse received by the object.
The impulse received by the object is determined from the product of force and time of action.
J = Ft
Ft() = kt + τ
at time 0 s
Ft(0) = 1(0) + 1
Ft(0) = 1 Ns
at time , t = 3 s
Ft(3) = 1(3) + 1
Ft(3) = 4 Ns
Change in momentum from 0 s to 3 s, = 4 Ns - 1 s = 3 Ns
Thus, the change in the momentum of the object moving along a straight line is determined as 3 Ns.
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A glass slides across a bar and slows down due to a kinetic friction of 0. 175N. If the glass weighs 0. 500N, what is the coefficient of kinetic friction between the glass and the bar?
Answer:
F = M a = Ff force of friction
Ff = μ M g = μ W where M g = weight of glass
The problem gives the kinetic friction as a force (Ff) in Newtons
μ = Ff / W = .175 / .500 = .35
how would you ground an electrical applicance
Question :- If a spring of spring constant ‘m’ is divided into 5:3 ratio, then what will be the spring constant of the larger piece of spring?
Answer :- 8m/5
I need explanation!
[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]
Here we go ~
As we have been given, The spring of spring constant " m " was cut to form 2 new springs in ratio of 5 : 3.
we have to find out the spring constant of the longer spring which was formed, and it's given that spring constant of the main spring was " m "
Now, let the length of main spring be " l "
So, lengths of the resultant springs will be :
[tex]\qquad \cal \dashrightarrow \: \dfrac{5l}{8} \: \: and \: \: \dfrac{3l}{8} \: \: \: \: respectively[/tex]
And we know that spring constant is inversely proportional to length of spring so, we infer that :
[tex]\qquad \cal \dashrightarrow \: m\propto \dfrac{1}{l} m \: \: \: \: \: - (1)[/tex]
where, m is spring constant of main spring and l is its length.
[tex]\qquad \cal\dashrightarrow \: m_1 \propto \dfrac{8}{5l} \: \: \: \: \: \: \: - (2)[/tex]
where, m1 is spring constant of longer spring, and 5l/8 is its length.
let's divide (2) by (1), we will get ~
[tex]\qquad \cal \dashrightarrow \: \dfrac{m_1}{m} = \dfrac{8}{5l} \div \dfrac{1}{l} [/tex]
[tex]\qquad \cal \dashrightarrow \: \dfrac{m_1}{m} = \dfrac{8}{5l} \times \dfrac{l}{1} [/tex]
[tex]\qquad \cal \dashrightarrow \: \dfrac{m_1}{m} = \dfrac{8}{5} [/tex]
[tex]\qquad \cal \dashrightarrow \: {m_1}{} = \dfrac{8}{5} m [/tex]
So, the spring constant of equivalent longer strong formed will be 8/5 m
prove:
[tex]m_2 = \frac{8m}{5} [/tex]
Explanation:
Given:
Spring constant of spring= m
The ratio of spring = 5:3
To find:
spring constant of the larger piece of spring?
Solution:
Let the length of larger piece L2 be 5x and smaller piece L1 be 3x with spring constant m2 and m1 respectively.
now,
spring constant (m) inversely proportional to the length of spring i.e.
[tex]m \propto \: \frac{1}{l} {,}\: m_1 \propto \: \frac{1}{l_1} {,}\: m_2 \propto \: \frac{1}{l_2}[/tex]
Also,
The spring is connected in series hence,
[tex] \frac{1}{m} = \frac{1}{m_1} + \frac{1}{m_2} [/tex]
and
[tex] \frac{m_1}{m_2} = \frac{l_2}{l_1} \\ {m_1} = {m_2} \cdot \frac{l_2}{l_1} \\ {m_1} = {m_2} \cdot \frac{5}{3} \\ [/tex]
Substituting above value in,
[tex] \frac{1}{m} = \frac{1}{m_1} + \frac{1}{m_2} \\ \frac{1}{m} = \frac{1}{{m_2} \cdot \frac{5}{3}} + \frac{1}{m_2} \\ \frac{1}{m} = \frac{3}{5m_2} + \frac{1}{m_2} \\ \frac{1}{m} = \frac{3m_2 + 5m_2}{5 {m_2}^{2} } \\ \frac{1}{m} = \frac{8m_2}{5 {m_2}^{2} } \\ \frac{1}{m} = \frac{8 \cancel {m_2}}{5 \cancel{m_2}^{2} } \\ \frac{1}{m} = \frac{8}{5m_2} \\ m_2 = \frac{8m}{5} [/tex]
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why metallic chain is used in the tanker transporting highly inflammable liquid
Answer:
For the displacement of charge
Explanation:
When the vehicle is in motion,due to friction in air,the body of the vehicle gets charged. if accumulated, charge becomes excessive,sparking May occur and inflammable materials may catch fire. therefore metallic chains touching the ground are introduced so that the charge quickly leaks to the earth.
Explanations based on supernatural forces, values or ethics can never be disproved and thus do not fall under the realm of science.
options:
True
False
Answer:
true, since science does not believe and agree to the supernatural.
What is a mutation? *
A) a type of molecule that genes and chromosomes are made of
B) a random change to a gene that sometimes results in a new trait
C)the process in which two parents pass on their genes to create offspring
D)a characteristic that all members of a species have
How many years does it take for pluto to orbit the sun.
Answer:
248 years
Explanation:
The last time this happened was from 1979 to 1999. It won't happen again until 2227.
when an atom is unstable it will ___ into a new atom
Answer:
When an atom is unstable it will change into a new atom
What is the difference between heat capacity and specific heat?.
Answer:
Heat capacity is the amount of heat required to raise the temperature of an object by 1oC. The specific heat of a substance is the amount of energy required to raise the temperature of 1 gram of the substance by 1oC.
Explanation:
The answer is above.
Car A can travel around a curved section of road without skidding at a maximum constant speed of 10 m/s. When car B travels around the same curve without skidding at its maximum speed, it has twice the centripetal acceleration as car A. The maximum speed at which car B can safely travel around the curve is most nearly
Answer:
C) 14 m/s
Explanation:
First step is to work out the centripetal acceleration of Car A. The equation for centripetal acceleration is:
a = v^2 / r
So we substitue in the value given for Car A's speed and get:
a = (10)^2 / r
a = 100 / r
We know that Car B has twice the centripetal acceleration of Car A, or 2a, therefore:
2a = 2 ( 100 / r ) = 200 / r
Now we know the centripetal acceleration of Car B! Last step: we use a = v^2 / r to find the velocity of Car B:
a = v^2 / r
200 / r = v^2 / r (r's cancel)
v^2 = 200
v = 14.1 m/s
Hope that helped! Sorry, I have no idea how to use the equation tool.
The spacecraft that really gave scientists their first good close-up look at the planet Mercury was:
Answer:
Mariner 10 in 1974 and 1975
Explanation:
how is sound produced
Sounds are created when something vibrates (shakes back and forth), sending waves of vibrations into the ears of the listener. When a bell is struck, the metal vibrates. The vibrations travel through the air as sound waves.
hope this helps
The signs of cognitive (mental) stress include all of the following except: a. loss of memory b. loss of concentration c. poor judgment d. isolation please select the best answer from the choices provided. a b c d
All of the above-mentioned symptoms of cognitive stress except for isolation. Option d is correct.
What is cognitive mental stress?Mental (cognitive) stress is an emotional/physical strain that causes a person to feel irritated, depressed, angry, anxious, and so on.
Cognitive stress is marked by a variety of moods and/or emotions linked to excessive anxiety about money, overall health, job loss, and so on.
All of the above-mentioned symptoms are markers of cognitive stress. In some circumstances, this condition may exacerbate stress.
Loss of memory, loss of concentration, and poor judgment are symptoms that are markers of cognitive stress.
Social isolation has been linked to a variety of mental illnesses, including increased stress, despair, and anxiety.
Hence all of the above-mentioned symptoms of cognitive stress except isolation. Option d is correct.
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Answer:
D
Explanation:
Radiation transfers
thermal
energy by
waves. These waves transfer energy from a warmer object to a cooler object, with or without
Answer:
Radiation travels by Waves!!
Explanation:
BONUS:Thermal radiation is a longitudinal wave.
Hope this helped
Answer:
Radiation transfers energy by ⇒ electromagnetic waves. These waves transfer energy from a warmer object to a cooler object, with or without ⇒ matter .
Explanation:
edge2022
Once the merry-go-round travels at this new angular speed, with what force does the person need to hold on?.
For a merry go round with a radius of R=1.8 m and moment of inertia I=184 kg-m^2 is spinning with an initial angular speed of w=1.48 rad/s is mathematically given as
F= 618.9 N
What is the centripetal force?Generally, the equation for the angular speed is mathematically given as
w = v/R
Therefore
w= 4.7/1.8
w= 2.611 rad/s
Where total momentum
Tm= 642.96 + 272.32
Tm= 915.28
and total inertia
Ti= 184 + 246.24
Ti= 430.24
In conclusion, centripetal force
F= mrw^2
F = m*R*w2^2
F = 76*1.8*2.127^2
F= 618.9 N
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CQ
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a merry go round with a radius of R=1.8 m and moment of inertia I=184 kg-m^2 is spinning with an initial angular speed of w=1.48 rad/s in the counter clockwise direction when viewed from above a person with mass m=76 kg and velocity v=4.7 m/s runs on a path tangent to the merry go round once at the merry go round the person jumps on and holds on to the rim of the merry go round angular speed of the merry go round after the person jumps on 2.127 rad/s Once the merry go round travels at this new angular speed with what force does the person need to hold on?
A cosmic ray electron moves at 7.50 × 106 m/s perpendicular to the Earth’s
magnetic field at an altitude where field strength is 1.00 × 10−5 T. What is the radius
of the circular path the electron follows?
Answer:
4.27m
Explanation:
force on moving charge= qvBsin$
centripetal force=mv^2/r
since the forces are equal
mv^2/r=qvBsin$
r= (mv^2)/(qvBsin$) = mv/qBsin$
r-radius
m-mass of an electron
q-charge on electron
v-velocity of the electron
B-field strength
$ - angle
r= ((9.1093837 ×10^-31)kg × 7.50 × 10^6 m/s)/(1.6×10^-19C×10^-5T×sin90) = 4.27m
Explain why ethylated spirit at room temperature when dropped at the back of the Palm makes the Palm to feel very cold.
Answer:
methylated spirit is in fact methanol added to ethanol (usually 10% methanol is used). The liquid evaporates which means that the liquid converts to a gaseous state. This process requires energy which it extracts from your body in the form of heat.
Explanation:
In a parallel circuit the ________ resistance is always less than the resistance of any individual resistor.
Answer:
"total" resistance
The current will have the option of going thru more than 1 resistor so the total resistance of the circuit will be less than any resistance in the circuit.
The shared attitudes, values, goals, and practices that characterize groups is defined as
A. family
B. parenting
C. genetics
D. culture
Please select the best answer from the choices provided
Ο Α.
OB
Ос
OD
Light enters air from water. The angle of refraction will be.
Answer:
90 degrees...
Explanation:
Hope this helps you!!!
What is the position of the earth, moon, and sun during a new moon?
Earth is between the sun and the moon
sun is between Earth and the moon
moon is to the side of Earth and the sun
moon is between the sun and Earth
Answer: The first option
Explanation: common sense
The Moon always rotates about the Earth in its orbit. The position of the Earth, moon and sun during a new moon is Earth is in between Sun and Moon.
What is new moon?When moon has travelled for 14 days, it starts its journey again for the next 14 days. The journey starts from the new moon to the full moon. The position of new and full moon is the same. At this time, the Earth is in between the Sun and the Moon.
Thus, the position of the Earth, moon and sun during a new moon is Earth is in between Sun and Moon.
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