Most of the motion generated by joints in the human body are examples of levers. an example of a third class lever is the forearm: the force which generates the motion is located in between the pivot point and the resistance force. the elbow acts as the pivot point, the biceps muscle pulls up on the forearm to move the mass which is held in the hand. imagine you are holding an object in your hand with your forearm horizontal and your upper arm vertical so your elbow creates a 90 angle. if your biceps áttach to your forearm 0.0554 m from the elbow and make an angle of 25.0 with the vertical while a 3.14 kg mass is held in your hand 29.46 cm from the elbow, what force is exerted by the biceps muscle? ignore the mass of the forearm

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.

i believe the answer is a hope it and is correct