Acopper cylinder must be gripped by a 3-fingered robot gripper. the copper cylinder weighs 12.4 lbf. the cylinder must be gripped on a pallet, lifted vertically 10 inches against gravity, transported horizontally 86 inches, placed into a heat treat furnace, then released. the coefficient of friction between the gripper fingernails and the copper cylinder is 0.18. the factor of safety for this application is 2.3. calculate the minimum grip force per finger in lbf for this application.

question1

1,000 tons

question2

3: 8

question 3

store d

step-by-step explanation:

f is prop to m1xm2 double m1 double force

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.