Why didn't the first stars to form have solar systems with Earth like planets and satellites?

A freight train has a mass of 1.1 ✕ 107 kg. If the locomotive can exert a constant pull of 8.1 ✕ 105 N, how long does it take to increase the speed of the train from rest to 60 km/h?

The refractive index of glass is 1.65 find the speed of light in glass.

How can magnet be used to produce an electric current

Why are metals good conductors of electric current? Choose one of the followingDo they possess high concentrations of protonsDo they possess low concentrations of protonsDo they possess high concentrations of free electronsDo they possess low

If you were made of rubber then you would just stretch in response. But humans are composed of other materials such as bones and muscles and organs. Your body would stay whole until the instant the tidal force exceeded your body's molecular bonds.

If you could see the electric field coming off a proton you would notice that electric field lines are

We wrap a light, nonstretching cable around a 10.0 kg kg solid cylinder with diameter of 38.0 cm cm. The cylinder rotates with negligible friction about a stationary horizontal axis. We tie the free end of the cable to a 14.

A 0.5kg baseball experiences a 10N force for a duration of 0.1s. What is the change in velocity of the baseball

A beam of light passes from air into a cube of zirconium if the angle of incidence is 40"what is the angle of refraction?

Which element combines chemically with sodium to form ordinary table salt? A) aluminum B) argon C) carbon D) chlorine