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3 years ago

What is E=MC2 please I need to know

1 answer:

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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This problem, a squid at rest suddenly sees a predator coming toward it and needs to escape. Assume the following:______.

makkiz [27]

Answer:

6.79 m/s

Explanation:

By applying the principle of conservation of momentum.

The total momentum = MV - mv = 0 (since the squid is beginning at rest)

the mass of the squid (M) in absence of water in its cavity = (6.5 - 1.75) kg

= 4.75 kg

speed of the squid (V) = 2.5 m/s

mass of the water expelled (m) = 1.75 kg

speed of the water (v) = ???

∴

4.75 × 2.5 = 1.75 × v

$v = \dfrac{4.75 \times 2.5}{1.75 }$

v = 6.79 m/s

8 0

3 years ago

Is a football tackle an elastic or inelastic collision and why?

QveST [7]

If the kinetic energy of an object changes, then the collision is considered inelastic. This is regardless of whether the objects sticks together or not.

My best answer for this question would be D) inelastic, because kinetic energy is not conserved.

We can tell from the collision that it is not elastic.

Momentum is is conserved, it transfers to the other player.

Kinetic energy is not conserved, at it turns into internal friction.

I hope this helps! :)

3 0

3 years ago

What is the average kinetic energy of helium atoms in a region of the solar corona where the temperature is 5.90 x 10^5 K?

OLEGan [10]

Answer: The average kinetic energy of helium atoms is $1.222\times 10^{-17}J$

Explanation:

To calculate the average kinetic energy of the atom, we use the equation:

$K=\frac{3}{2}kT$

where,

K = average kinetic energy = ?

k = Boltzmann constant = $1.3807\times 10^{-23}J/K$

T = temperature = $5.9\times 10^5K$

Putting values in above equation, we get:

$K=\frac{3}{2}\times 1.3807\times 10^{-23}J/K\times 5.9\times 10^5K\\\\K=1.222\times 10^{-17}J$

Hence, the average kinetic energy of helium atoms is $1.222\times 10^{-17}J$

4 0

3 years ago

Atomic math challenge will give brainly and thanks

nevsk [136]

Answer:

1. Hydrogen

Atomic # = 1

Atomic Mass = 1.00794 ( If you round it it's 1.008 )

# of protons = 1

# of neutrons = none

# of electrons = 1

8 0

3 years ago

Read 2 more answers

The rate of doing work is called _____. power force energy inertia

balandron [24]

The rate of doing work is called POWER.

Power is also defined as the rate of transfer of energy. It measures the speed of how work is done.

The unit of power is WATT.

Power is computed by dividing WORK DONE by TIME TAKEN.
P = W/t

1 watt:
*power of a machine
*power of an agent that does work at the rate of 1 joule per secon

1000 watt = 1 kilowatt
1000 kilowatt = 1 megawatt

8 0

3 years ago

Read 2 more answers