A train travels 120 km in 2 hours and 30 minutes. what is it average speed?

What is the term for the force exerted on an object by another object

As you are leaving a building, the door opens outward. if the hinges on the door are on your right, what is the direction of the angular velocity of the door as you open it?

Which of the following best describes a spiral galaxy? Less than one hundred stars arranged in spherical shape A few thousand planets arranged in an elliptical shape Several billion stars arranged in arms spiraling outwards Several billion planets

A coil of wire consists of 20 turns, each of which has an area of 0.0015 m2. A magnetic field is perpendicular to the surface with a magnitude of B 4.91 T/s t - 5.42 T/s2 t2. What is the magnitude of the induced emf in the coil?

How far does a car go in 10 seconds at the speed of 44m/s

What is the efficiency of a tractor that has a work output of 300j and a work input of 400j

An atom with 19 protons and 18 neutrons is an

Where does the "2" come from in the expression for paverage? why is there no time dependence? } questions 55 - 56 consider alternating current. 55.

Indicate whether the statement is true or false. A scientific fact is something that is absolute and unchanging.

What is common to all light sources, including incandescent, fluorescent, neon, halogen, laser, and sodium-vapor devices?