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ivanzaharov [21]
3 years ago
12

Which device is used to increase or decrease the voltage of an alternating

Physics
1 answer:
Kazeer [188]3 years ago
6 0

Answer:

D.

A transformer

Explanation:

Transformer is used to regulate voltage

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What is the significance of the fact that the gravitational constant, G, is a very small number and that Coulomb’s constant, k,
WITCHER [35]

The comparison indicates that the gravitational force is a much weaker force than the electromagnetic force. This is the significance of the fact that the gravitational constant, G, is a very small number and that Coulomb’s constant, k, is a very large number

Answer: The comparison indicates that the gravitational force is a much weaker force than the electromagnetic force.

<u>Explanation: </u>

We know that the universal formula for the estimation of gravitational force is,

                       F=G \times\left(\frac{m_{1} \times m_{2}}{r^{2}}\right)

Where,

F, Gravitational force, m_{1} \text { and } m_{2}- objects masses r- The relative distance between the two objects  

G, Gravitational Constant 6.67 \times 10^{-11} \frac{N m^{2}}{k g^{2}}

And, the electrostatic force between two scalar charges according to the Coulomb’s law is,

                  F=k \times\left(\frac{q_{1} \times q_{2}}{r^{2}}\right)

F, Electrostatic force between two charges,q_{1} \text { and } q_{2}- Two scalar charges, r - The relative distance between two scalar charges, k- Coulomb’s constant 8.987 \times 10^{9} \frac{N m^{2}}{c^{2}}

Now, on comparing the values of G and k, we can easily evaluate that eventually, the gravitational force will be lesser than the coulomb’s force.  

Besides this, we can also judge this fact through various examples such as, a balloon rubbed with a cloth, easily sticks to the wall for some time. Opposing the gravitational force of the Earth which is not the case with the normal balloon.

It drops without having the electrostatic force between the wall and the balloon.  This shows that the gravitational force draws lesser impact on objects as compared to the electrostatic force.

7 0
3 years ago
Read 2 more answers
Copper has a specific heat of 0.386 J/g°C. How much heat is required to increase 5.00 g of copper from 0.0°C to 10.0°C?
Leto [7]
The answer is 19.3 j
3 0
3 years ago
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When the batter hit the foul ball, the baseball moved upward to a delighted fan in the top deck.
oee [108]

Answer:

B) Kinetic energy increases, potential energy decreases

Explanation:

In a given system, when a body is at rest, v =0m/s, the kinetic energy is at zero while the potential energy is at maximum. However, when a body is in motion with a velocity = v, the potential energy is at zero while the kinetic energy is at maximum.

Before this happen, the a body at rest (P.E = max) is set on motion, the kinetic energy gradually increases till it converts all the potential energy in the system to kinetic energy and then reverses back when the body goes to rest again.

In this case, before the batter hits the ball, the kinetic energy was at zero while the potential energy was at maximum. However, when he hits the ball and sets it into motion with a velocity V, the potential energy converts to kinetic energy and moves the ball with that energy till it has expanded it and comes to rest.

Potential Energy → Kinetic Energy → Potential Energy.

That's how the system keeps changing.

6 0
3 years ago
HELP ASAP!
Leto [7]

Answer:

8kg

Explanation:

For the box to be in equilibrium. The clockwise moment ensued by the box on the right should be same as that ensued by the one on the right. Hence :

M ×3 = 12 ×2

M = 24/3 = 8kg

Note mass is used because trying to compute the weight by multiplying by the acceleration of free fall due to gravity on both sides will cancel out.

4 0
3 years ago
You and your surfing buddy are waiting to catch a wave a few hundred meters off the beach. The waves are conveniently sinusoidal
bekas [8.4K]

Answer:

(a): The frequency of the waves is f= 0.16 Hz

Explanation:

T/4= 1.5 s

T= 6 sec

f= 1/T

f= 0.16 Hz (a)

6 0
3 years ago
Read 2 more answers
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