4 years ago

Which element could not form in the sun and would have to be formed in a supernova?

Physics

1 answer:

Nimfa-mama [501]4 years ago

3 0

Uranium (atomic number 92)

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A machine gun fires 50-g bullets at the rate of 4 bullets per second. The bullets leave the gun at a speed of 1000 m/s. What is

TEA [102]

Answer:

Average recoil force experienced by machine will be 200 N

Explanation:

We have give mass of each bullet m = 50 gram = 0.05 kg

There are 4 bullets

So mass of 4 bullets = 4×0.05 = 0.2 kg

Initial speed of the bullet u = 0 m/sec

And final speed of the bullet v = 1000 m/sec

So change in momentum $P=m(v-u)=0.2\times (1000-0)=200kgm/sec$

Time is given per second so t = 1 sec

We know that force is equal to rate of change of momentum

So force will be equal to $F=\frac{200}{1}=200N$

So average recoil force experienced by machine will be 200 N

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3 years ago

All substances are built from

Greeley [361]

An atom. Hope this helped

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3 years ago

22) The sensory cells associated with the deep layers of the epidermis are

finlep [7]

Answer:B. Merkel Cells

Explanation:

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3 years ago

If the 50-kg crate starts from rest and achieves a velocity of v = 4 m/s

Kay [80]

Answer:

P = 227 N

Explanation:

Assuming the crate is on horizontal ground and subject to a horizontal force.

F = ma

P - μmg = ma

P = m(a + μg)

P = m(v²/2s + μg)

P = 50(4²/(2(5))+ 0.3(9.8))

P = 227 N

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3 years ago

3. A microwave oven draws 12 A of current on a 110 V household circuit. What is its power

steposvetlana [31]

Answer:

W = 1320Watts

Explanation:

W = I*V

W = 12A*110V

W = 1320Watts

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3 years ago