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3 years ago

What is the kinetic energy of a 150 kg object that is moving with a speed of 15 m/s

Chemistry

2 answers:

PilotLPTM [1.2K]3 years ago

7 0

KE = 1/2*m*v^2

KE = 1/2*150kg*(15 m/s)^2
KE = 75kg * 225m²/s²

KE = 16875 kg*m²/s²
KE = 16875 N*m

KE = 16,875 J

frosja888 [35]3 years ago

4 0

I learned this in my science class. The answer is 16875J. Hte equation for kinetic energy is K.E. = 1/2 m v2.

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The electron in a hydrogen atom, originally in level n = 8, undergoes a transition to a lower level by emitting a photon of wave

timofeeve [1]

Explanation:

It is given that,

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$\lambda=3745\ nm$

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$\Delta E=R_H[\dfrac{1}{n_f^2}-\dfrac{1}{n_i^2}]$

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Plugging all the values we get :

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2 years ago

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KIM [24]

<u>Answer:</u> The sample of Carbon-14 isotope will take 2377.9 years to decay it to 25 %

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$t_{1/2}=\frac{0.693}{k}$

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$t_{1/2}$ = half life of the reaction = 5730 years

Putting values in above equation, we get:

$k=\frac{0.693}{5730yrs}=1.21\times 10^{-4}yrs^{-1}$

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$k=\frac{2.303}{t}\log\frac{[A_o]}{[A]}$

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Putting values in above equation, we get:

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3 years ago

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