Atruck pulls a trailer at a constant velocity for 100 m while exerting a force of 480 n. calculate the work done. a) 380 j b) 580 j c) 48,000 j d) 4.8 j

Considering the definition of work,

Force is any agent capable of modifying the amount of movement or the shape of material bodies.

So work is defined as a force acting through a distance (or displacement), and is calculated as the product of the component force and the distance. The force can be constant over the distance or vary over the distance.

In mathematical terms, work is defined as

W = F×d

where:

If force is measured in Newtons and distance in meters, then work is measured in units of energy which are joules (J).

In this case, you know:

Replacing in the definition of work:

W= 480 N×100 m

Solving:

W= 48,000 J

Finally, the correct answer is option c): The work done is 48,000 J.

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i need the answer to this too but idk it ; -;

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.