Consider a system consisting of two objects initially moving separately. The two objects collide and stick together. If the objects continue moving after crashing, what can we state about the kinetic energy
and momentum of the system before and after the crash?

A. The kinetic energy of the system has decreased.
The momentum of the system has decreased.

B. The kinetic energy of the system remains constant.
The momentum of the system remains constant.

C. The kinetic energy of the system remains constant.
The momentum of the system has decreased.

D. The kinetic energy of the system has decreased.
The momentum of the system remains constant.

which three statements are true about all alloys?

its a 5.5 n

glad that

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.

the components of a vector are the parts of the vectors that are to each other.

b perpendicular