Is plane mirror a reflection

In most circumstances, the normal force acting on an object and the force of static friction do no work on the object. However, the reason that the work is zero is different for the two cases.

A weight suspended from a spring is seen to bob up and down over a distance of 39 cm twice each second. what is its frequency? answer in units of hz.

Cart A is moving at 2 m/s and cart b is at rest. After a perfectly elastic collision (cart A is stationary after the collisions), how fast will cart b move? Both carts have a mass of 1 kg

In a quasi-static isobaric expansion, the gas does 26.4 J of work. The initial pressure and volume of the gas is 0.9 atm and 19 L. If the internal energy of the gas increases by 80 J in the expansion, how much heat does the gas absorb?

What is a chromosome made of?

When a car crashes, do you think its speed can make a difference in the amount of damage done?

An 8000-n car is traveling at 12 m/s along a horizontal road when the brakes are applied. the car skids to a stop in 4.0 s. how much kinetic energy does the car lose in this time?

The graph shows that the molecules in a liquid do not all have the same speed

When the air under the envelope is heated, the balloon lifts. Which of the following statements is true?

A bullet of mass 6.00g is fired horizontally into a wooden block of mass 1.20kg resting on a horizontal surface. The coefficient of kinetic friction between block and surface is 0.160.