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3 years ago

What is the energy equivalent of an object with a mass of 25 kg?

Physics

1 answer:

Amanda [17]3 years ago

3 0

Answer:

$2.25\cdot 10^{18} J$

Explanation:

The energy equivalent of the mass of an object can be calculated by using the Einstein's equation:

$E=mc^2$

where

E is the energy

m is the rest mass of the object

$c=3\cdot 10^8 m/s$ is the speed of light

For this object

m = 25 kg

So its equivalent energy is:

$E=(25)(3\cdot 10^8)^2=2.25\cdot 10^{18} J$

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What happens to the gravitational attraction between 2 objects

amm1812

Answer:

It decreases.

Explanation:

between the two interacting objects, more separation distance will result in weaker gravitational forces. So as two objects are separated from each other, the force of gravitational attraction between them also decreases

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3 years ago

What is the effect of using split rings in a simple d.c generator

Aliun [14]

Answer:

Hence, The effect of using split rings in a simple DC motor is that the direction of the current flowing in the coil is reversed.

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3 years ago

The first law of thermodynamics states that ΔE= Q− W . Is this also a statement of the principle of conservation of energy? Yes,

ozzi

Answer:

Yes, the heat that flows into the system is used to change the internal energy of the gas and becomes work done by the piston.

Explanation:

First law of thermodynamics known as Law of Conservation of Energy, states that energy can neither be created nor destroyed; energy can only be transferred or changed from one form to another.

The first law of thermodynamics states that the change in internal energy of a system equals the net heat transfer into the system minus the net work done by the system. In equation form, the first law of thermodynamics.

This is the first law of thermodynamics

ΔE= Q− W

ΔE= change internal energy of the system.

Q= heat transfer into the system

And

W= work done by the system.

Rewriting the equation

ΔE= Q− W

Q=ΔE +W

Show that the heat flowing l into the system is transferred to the internal energy of the system and the work done by the piston

So the third option is correct

3 0

3 years ago

a skydiver jumped out of a plane and fell 9 miles to the ground. his average speed while falling was 174 miles/hour. how much ti

shutvik [7]

Answer:

t = 0.051 seconds

Explanation:

Given that,

A skydiver jumped out of a plane and fell 9 miles to the ground. It means 9 miles is the distance covered.

The average speed of the skydiver is 174 miles/hour

We need to find the time for which he dive last. It means t is the time taken. Total distance covered divided by time taken is called average speed. So,

$v=\dfrac{d}{t}\\\\t=\dfrac{d}{v}\\\\t=\dfrac{9}{174}\\\\t=0.051\ s$