Physics, 05.10.2019 16:00 Gladistshiala267

Acar acceleration from rest to a speed of 36 km/hr in 20seconds what is the acceleration of the car in meters per

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In order to answer this question, it is important to remember and to know the formula for getting the acceleration of an object.

The formula for acceleration would be:
final velocity - initial velocity
= acceleration (meter / second squared)
final time - initial time

substitute

36 km/hr - 0
= meter / second squared
20 seconds

convert kilometer and hour to meter and second respectively

(36 km / hr) * (1000m / 1 km) * (1 hr / 3600 s)
= meter / second squared
20 seconds

and you get

10 m / s
= meter / second squared
20 seconds

then solve which would give you the answer of

0.5 meter / second squared = the acceleration of the car

Answer from: Quest

scattering of light by tiny particles in air to produce the colors we see on sky, is dependent on the following factors:

(i) wavelength of light

(ii) size of the scattering particle

(iii) distance traveled by light through the atmosphere.

according to rayleigh's law of scattering, the amount of scattering is inversely proportional to the fourth power of its wavelength. shorter the wavelength, greater is its scattering. hence violet/blue light is scattered more than red.

sun's light is a composite light ( visible light) with wavelengths in the range 400 nm (violet) to 700 nm (red). as sunlight passes through our atmosphere, the molecules of air scatter light according to their wavelengths. during sunrise and sunset, the sun's position is below the horizon. hence light from the sun travels a greater distance in the atmosphere when compared to its position a noon.

as sunlight enters the earth's atmosphere, blue light is scattered away and at the end of its journey in the sky, only red and orange wavelengths remain in the beam.

hence at sunrise and sunset, the sky appears reddish orange.

Answer from: Quest

Aform of energy that is reflected or emitted from objects in the form of electrical and magnetic waves that can travel through space. there are many forms of electromagnetic energy including gamma rays, x rays, ultraviolet radiation, visible light, infrared radiation, microwaves and radio waves.

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Acar acceleration from rest to a speed of 36 km/hr in 20seconds what is the acceleration of the car...

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