A girl who is watching a plane fly tells her friend that the plane isn't moving at all. Describe a frame of reference in which the girl's description would be true

Does exists the friction force in space? If yes, tell an full example

What color of light has the shortest wavelength

A 4.39/times10^5~/text{kg}4.39*10 5 kg subway train is brought to a stop from a speed of 1.08 miles per hour in 0.397 m by a large spring bumper at the end of its track. What is the force constant k of the spring?

An electron is accelerated from rest by potential difference of 350volts it then enters a uniform magnetic field of magnitude 200mT with its velocity perpendicular to the field calculate The speed of eletron The radius of the path in the magnetic

This planet gets its blue-green color because its atmosphere is full of methane gas and hydrogen. Earth Venus Uranus Neptune

Do you think Pluto should be considered a planet? Why or why not?

An object starts from rest at time t = 0.00 s and moves in the + x direction with constant acceleration. The object travels 14.0 m from time t = 1.00 s to time t = 2.00 s. What is the acceleration of the object? a) 5.20 m/s^2 b) 10.4 m/s^2 c) 8.

A box is dragged without acceleration in a straight-line path across a level surface by a force of 13 N. What is the frictional force between the box and the surface?

What is a wormhole, and how is it formed?

Most cells cannot harness heat to perform work because