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faust18 [17]
3 years ago
6

A small truck has a mass of 1200 kg. If it is traveling at a velocity of 42.5 m/s, determine the kinetic energy.

Physics
1 answer:
LuckyWell [14K]3 years ago
3 0

Answer:

25,500J

Explanation:

KE =1/2 mv^2

Mass=1200kg

Velocity =42.5m/s

KE = 1/2 x 1200 x 42.5

=25,500J

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An electron in the n = 7 level of the hydrogen atom relaxes to a lower energy level, emitting light of 397 nm. what is the value
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Answer:

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Explanation:

It is given that,

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\dfrac{1}{\lambda}=R(\dfrac{1}{n_f^2}-\dfrac{1}{n_i^2})

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Solving above equation we get the value of final n is,

n_f=2.04

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n_f=2

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