Which of the following statements about hearing protection are true?

One way to get consistent, valid data is to: be sure that instruments are calibrated properly. use simple instruments to make measurements. select the best data to place into data tables. make the measurements as quickly as possible

A child slides down a slide on the playground and her hair starts to stand on end. What happened?

Why do plates move away from the mid - ocean ridges?

Does gravity exist between a pencil on a coffee mug

Why is it that the number of hours in the day never change yet some days fly by and others drag on?

Kai was 200 meters north of the library when he remembered he had to return some books to the library. It took him 200 seconds to do the round trip. Which best describes Kai's roundtrip?

The engine that powers a crane burns fuel at a temperature of 1500 oC. It is cooled by air at a temperature of 20 oC. The crane is used to lift a 1000 kg steel girder 30 m into the air.

The portion of a light ray that falls on a surface is a/an

Give the definition for diffusion. (A) gas molecules mix unequally average distance between collisions (B) gas molecules escape from a container into a vacuum through a small hole (C) gas molecules mix equally (D) gas molecules spread out in a

As resistance goes up, what happens to the current?