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Lisa [10]
3 years ago
14

What is E=MC2 please I need to know

Physics
1 answer:
Ierofanga [76]3 years ago
3 0
E = mc^2 is an equation derived by physicist Albert Einstein. It means "energy equals mass multiplied by speed of light squared (or multiplied by itself)." It expresses the fact that both mass and energy are the same physical entity and can be changed into each other. In fact, energy and mass are different forms of the same thing. In the said equation, the mass (represented by m) multiplied to the velocity of light squared (c^2) is equivalent to kinetic energy (e).

The E = mc^2 equation explains how every star (including our Sun) works by nuclear fusion (atoms fusing together while some of their mass is converted into energy), the atomic energy produced by nuclear power plants and atomic energy released by atomic bombs, and how matter can be destroyed and converted to energy and energy can be converted back to mass.
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2. As a pendulum swings, its energy is constantly converted between kinetic
Alex

Answer:

at point F

Explanation:

To know the point in which the pendulum has the greatest potential energy you can assume that the zero reference of the gravitational energy (it is mandatory to define it) is at the bottom of the pendulum.

Then, when the pendulum reaches it maximum height in its motion the gravitational potential energy is

U = mgh

m: mass of the pendulum

g: gravitational constant

The greatest value is obtained when the pendulum reaches y=h

Furthermore, at this point the pendulum stops to come back in ts motion and then the speed is zero, and so, the kinetic energy (K=1/mv^2=0).

A) answer, at point F

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3 years ago
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3 years ago
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Hi There,

  
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Read 2 more answers
Suppose that you have been chosen for a space mission to a distant planet. Due to the length of time you'll be away from Earth y
Contact [7]

Answer:

I should be active for 15 hours to meet the physical activity requirement.

Explanation:

Since time dilates in moving objects, we use the formula t = t₀/√(1 - β²) where t = time in space vehicle, t₀ = time on earth = 9 hours and β = v/c where v = speed of space vehicle = 0.8c.

So, t = t₀/√(1 - β²)

t = 9/√(1 - (v/c)²)

= 9/√(1 - (0.8c/c)²)

= 9/√(1 - (0.8)²)

= 9/√(1 - (0.64)

= 9/√0.36

= 9/0.6

= 15 hr

So, according to a timer on the space vehicle, I should be active for 15 hours to meet the physical activity requirement.

8 0
4 years ago
A drawback of burning biomass to produce electricity is that it is ___.
attashe74 [19]

Answer: Unsustainable wood harvesting can lead to deforestation, soil erosion, and desertification.

Explanation: you welcome

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