When combing your hair, you scuff electrons from your hair onto the comb. is your hair then positively or negatively charged? how about the comb?

What could not act as a medium for a mechanical wave

Each light switch in the classroom allows you to turn on one row of lights. What conclusion can you make about how the rows of lights are connected and justify this answer.

The process in which light travels through an object is called

An elevator rising at a constant speed. What forces are acting on the elevaror? A: Normal and tension B: Gravity and tension C: Normal, gravity, and tension D: Gravity

Total peripheral resistance is related to all of the following except the

As stream velocity decrease, which factor will likely increase? A) erosion of the stream bank B) deposition of material in the stream C) amount of material carried downstream D) size of the particles carried downstream

What cells in the nervous signals travel through the nervous system

A mechanic pushes a 3.60 ✕ 103-kg car from rest to a speed of v, doing 5,130 j of work in the process. during this time, the car moves 21.0 m. neglecting friction between car and road, find v and the horizontal force exerted on the car.

Anika asks Eva to roll a basketball and then a bowling ball to her. Which requires more force to roll, and why?

Why does a buoyant force act on every object in a fluid? Pressure pushing up on the bottom of the object is greater than the pressure pushing down on the top.