A large blue box sits on top of a small orange box on a smooth floor. A force to the right pushes on the large blue box. The coefficient of static friction between the two boxes is 0.30. The coefficient of kinetic friction between the two boxes is 0.20. The coefficient of static friction between the orange box and the floor is also 0.30 and the coefficient of kinetic friction between the orange block and the floor is also 0.20. The weight of the large blue box is 400 Newtons and the weight of the small orange box is 250 Newtons. What is the Normal force of the floor on the orange block in Newtons? Use three significant figures.

kepler used the data from tycho blahe (his mentor) to construct the laws of planetary motion.

the answer is ampere

the ampere is used to measure electricity. an ampere is a unit of electric current equal. a unit of measure for the flow of current in a circuit. one ampere is the amount of current flow provided when one volt of electrical pressure is applied against one ohm of resistance.

d. platinum would have the greatest temperature increase because it has the lowest specific heat.

speed of light in vacuum is 300,000 km/s

speed of light in other mediums is given by the expression v = c/n, where c is the speed of light in vacuum and n is the refractive index of medium.

for the first medium v = 200,000 km/s

  so, refractive index of medium = 300000/200000 = 1.5

    1.5 refractive index is usually for glass. so first medium is glass.

for the second medium v = 250,00 km/s

so, refractive index of medium = 300000/250000 = 1.2

    1.2 refractive index is usually for water. so second medium is water.

for the third medium v = 0 km/s

so, refractive index of medium = 300000/0 = ∞

    ∞ refractive index is usually for opaque mediums. so third medium is opaque medium.