When a passenger in train A looks at a passenger directly across in train B it appears that train B is not moving even though both trains are moving. How does the speed od train A compare to train B

When does a planet have the fastest speed in its orbit? when it has a very low mass when it has a slow rotation when it is closest to the sun when it is farthest from the sun

A body of mass m is suspended from a spring with spring constant k in configuration (a) and the spring is stretched 0.1m.

While the negatively charged rod is near the disk without touching it, a hand briefly touches the end of the post. Then the negatively charged rod is removed. What would happen to the vane?

A positively charged metal sphere, A, is held close to but not touching and identical uncharged sphere, sphere B. Sphere A is now removed. After sphere A has been removed, sphere B is touched to an initially uncharged sphere, sphere C.

If 53.62 ml of an oil weighs 48.34 g what is the specific gravity of the oil

Which best blocks X-ray particles and can therefore be observed more closely through the use of this technology?

A light ray travels inside a horizontal plate of glass, striking its upper surface at an angle of incidence of 50°. This ray is totally internally reflected at the glass-air boundary. A liquid is then poured on top of the glass.

A stationary object has no forces acting on it. True False

April swims 50 m north and then turns and swims 20 m back to the south. What is her velocity if it takes her 60 seconds?

What happens to the mass of an object when it is cooled?