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3 years ago

13

The diver on the diving board in the opening picture weight is 500 newtons. The diving board is 5 meters above the ground. What

is the diver's gravitational potential energy

1 answer:

Vika [28.1K]3 years ago

8 0

Answer: Hello!, The answer would be 500 times 5, hope this helps!

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Which of these will be the correct relationship between work input and work output?

dsp73

<u>Answer:</u>

Work input = Work output * Work against friction is your answer so C

<u>Explanation:</u>

I hope this helps you :)

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2 years ago

The contact force that acts on objects in a liquid or gas and allows objects to float is called

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<span>The contact force that acts on objects in a liquid or gas and allows objects to float is called </span>Buoyancy.

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3 years ago

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Then answer is C 9 ohms

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In the nuclear fission process mass is converted into energy. Determine the total mass that must be converted to energy in one y

brilliants [131]

Answer:

1) Mass that needs to be converted at 100% efficiency is 0.3504 kg

2) Mass that needs to be converted at 30% efficiency is 1.168 kg

Explanation:

By the principle of mass energy equivalence we have

$E=mc^{2}$

where,

'E' is the energy produced

'm' is the mass consumed

'c' is the velocity of light in free space

Now the energy produced by the reactor in 1 year equals

$Energy=Power\times time\\\\\therefore Energy=1\times 10^{9}\times 365\times 24\times 3600\\\\Energy=31.536\times 10^{15}Joules$

Thus the mass that is covertred at 100% efficiency is

$mass=\frac{Energy}{c^{2}}\\\\mass=\frac{31.536\times 10^{15}}{(3\times 10^{8})^{2}}\\\\mass=\frac{31.536\times 10^{15}}{9\times 10^{16}}\\\\\therefore mass=0.3504kg$

Part 2)

At 30% efficiency the mass converted equals

$mass|_{30}=\frac{mass|_{100}}{0.3}\\\\mass|_{30}=\frac{0.3504}{0.3}\\\\mass|_{30}=1.168kg$

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3 years ago

What is the surface temperature of Sirius B in Kelvins?

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Answer: The surface temperature of Sirius B is 25,200 Kelvins(K).

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2 years ago

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