What is the spring constant for a supermarket scale that stretches 0.01 m when a force of 4 N is applied

How do the gravitational and electrical forces between a proton and neutron compare

Do i become a professional astrophysicist after getting PhD in Astrophysics? Or will i be a postdoc research student i mean will i be practicing under another researcher? Will i get the correct salary just after finishing PhD?

Which of the following items is good conductor of electricity

What happens to a light ray if it is incident on a reflective surface along the normal? A. The incident ray retraces its original path. B. The incident ray is reflected perpendicular to the normal. C.

A freshly brewed cup of coffee has temperature 95°c in a 20°c room. when its temperature is 65°c, it is cooling at a rate of 1°c per minute. when does this occur? (round your answer to two decimal places.)

You are in the lab and are given two rods set up so that the top rod is directly above the bottom one. The two straight rods 50-cm long are separated by a distance of 1.5-mm each with 15 A of current passing through them.

What is the explanation for feather beds being warm

A student wearing frictionless in-line skates on a horizontal surface is pushed by a friend with a constant force of 47 N. How far must the student be pushed, starting from rest, so that her final kinetic energy is 354 J?

Suppose a rocket ship in deep space moves with constant acceleration equal to 9.8 m/s2, which gives the illusion of normal gravity during the flight.

A canoeist on a lake throws a 0.145 kg baseball at 20.0 m/s to a friend in a different canoe. Each canoe with its contents has a mass of 120 kg, and is at rest initially.