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Licemer1 [7]
3 years ago
14

The kinetic energy of a ball with a mass of 0.5 kg and a velocity of 10 m/s isJ.

Physics
1 answer:
inysia [295]3 years ago
3 0

We know,

K.E. = 1/2 mv²

K.E. = 1/2 (0.5)(10)²

K.E. = 1/2 * 50

K.E. = 25 Kgm/s

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3 years ago
Visible light falls into wavelength ranges of 400-700 nm, for which 1 m = 1 × 10 9 nm . The energy and wavelength of light are r
Paul [167]

Answer:

E = 3.54 x 10⁻¹⁹ J

Explanation:

The energy of the photon can be given in terms of its wavelength by the use of the following formula:

E = \frac{hc}{\lambda}

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E = energy = ?

h = Plank's Constant = 6.626 x 10⁻³⁴ Js

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λ =  wavelength of light = 560.6 nm = 5.606 x 10⁻⁷ m

Therefore,

E = \frac{(6.626\ x\ 10^{-34}\ Js)(3\ x\ 10^8\ m/s)}{5.606\ x\ 10^{-7}\ m}\\

<u>E = 3.54 x 10⁻¹⁹ J</u>

7 0
3 years ago
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