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SashulF [63]
2 years ago
9

Does electric and magnetic objects both have north and south poles

Physics
1 answer:
Aleksandr [31]2 years ago
6 0

Explanation:

hope this answer was helpful

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What is the kinetic energy of a 50-kg child running to catch the school bus at
Vinvika [58]

Answer:

Option C

100 J

Explanation:

Kinetic energy, KE is given by

KE=0.5mv^{2} where m is the mass and v is the velocity

Substituting 50 Kg for mass, m and 2 m/s for velocity v then we obtain

KE=0.5*50*2^{2}=100 J

Therefore, the child's kinetic energy is equivalent to 100 J

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3 years ago
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Pe=___
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Answer:

H = start height (v = 0)

h = present height

v = present speed

assuming no friction

total energy = PE + KE

mgH = mgh + .5mv^2

if PE = KE then

mgH = mgh + mgh

h = H/2

potential energy = kinetic energy when object is at half its start height.

Explanation:

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The swim bladder of a fish helps keep the fish from sinking by_______.
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