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ahrayia [7]
3 years ago
5

What is the kinectic energy of 150kg object that is moving at 72 m/s

Physics
2 answers:
Annette [7]3 years ago
7 0
K.e = ½mv² = ½×150×72 = 75×72 = 5400joules
Orlov [11]3 years ago
3 0

the answer it actually 388800

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It is necessary to determine the specific heat of an unknown object. The mass of the object is 201.0 g. It is determined experim
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Answer:

for what?

Explanation:

d=S x T

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d=vt+1/2at2

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3 years ago
A car with a mass of 1600 kg is towing a trailer with a mass of 420 kg. The car
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3 years ago
Silver has a work function of 4.5 eV . Part A What is the longest wavelength of light that will release an electron from a silve
uranmaximum [27]

Answer:

λ = 2.7608 x 10⁻⁷ m = 276.08 nm

Explanation:

The work function of a metallic surface is the minimum amount of photon energy required to release the photo-electrons from the surface of metal. The work function is given by the following formula:

Work Function = hc/λ

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λ = longest wavelength capable of releasing electron.

Therefore,

7.2 x 10⁻¹⁹ J = (6.626 x 10⁻³⁴ J.s)(3 x 10⁸ m/s)/λ

λ = (6.626 x 10⁻³⁴ J.s)(3 x 10⁸ m/s)/(7.2 x 10⁻¹⁹ J)

<u>λ = 2.7608 x 10⁻⁷ m = 276.08 nm</u>

7 0
3 years ago
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