What two models are used to describe how light behaves

Two identical charges are separated by a distance d. If the distance between them is increased to 3d, what will happen to the force of repulsion between them? A) It will be one-ninth the original force. B) It will be one-third the original force.

Which of the following is true about a family psychologist?

Which of the following is a constant force?

Upon impact, bicycle helmets compress, thus lowering the potentially dangerous acceleration experienced by the head. A new kind of helmet uses an airbag that deploys from a pouch worn around the rider's neck.

Julia pushes her sled up a hill. In which direction is the force of friction acting?

If a bottle was heated what would be observed? Explain

A box with a mass of 100.0 kg slides down a ramp with a 50 degree angle. What is the weight of the box? N What is the value of the normal force? Round the answer to the nearest whole number.

How does thermal energy heat a house? What devices and systems are involved?

A skater with an initial speed of 7.68 m/s stops propelling himself and begins to coast across the ice, eventually coming to rest. Air resistance is negligible. (a) The coefficient of kinetic friction between the ice and the skate blades is 0.105.

A. A PH202 student lives next to a construction site and sees a crane with a wrecking ball demolish the building next door. The wrecking ball swings along the wall between her house and the neighbor's house.