A55 kg rock climber is in a lie-back climb along a fissure, with hands pulling on one side of the fissure and feet pressed against the opposite side. the fissure has width w = 0.25 m, and the center of mass of the climber is a horizontal distance d = 0.41 m from the fissure. the coefficient of static friction between hands and rock, μhands, is 0.34, and between boots and rock, μboots is 1.10.a. what is the least horizontal pull by the hands and push by the feet that will keep him stable? b. for this horizontal pull, what must be the vertical distance h between hands and feet? c. if the climber encounters wet rock; so that the coefficient of static friction between hands and rock, μhands, is 0.18, and between boots and rock, μboots is 0.80. what is the least horizontal pull by the hands and push by the feet that will keep him stable? d. for this horizontal pull, what must be the vertical distance h between hands and feet

prolly a beacuse the momentuem the car has increases while going down hill

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.

jupiter is the largest planet in our solar system, having a mass and radius that are respectively, 318 and 11.2 times that of earth. suppose that an object falls from rest near the surface of each planet and that the acceleration due to gravity remains constant during the fall. each object falls the same distance before striking the ground. determine the ratio of the time of fall on jupiter to that on earth.