Which change is the best example of a physical

change?

(1) a cookie baking (3) ice cream melting

(2) paper burning (4) a nail rusting

Compare and contrast the purpose of a control, an independent variable, and a dependent variable in an experiment.

Most stars are a. brown fs b. main sequence c. white dwarfs d. pulsars

What is a musical note

Which is the best description of a change in society that has resulted from advances in understanding the causes of diseases?

What is the force on an object that goes from 35 m/s to 85 m/s in 20 seconds and has a mass of 148 kg

If a train going 60 m/s hits the brakes, and it takes the train 1 minute 25 seconds to stop, what is the train's acceleration?

A scientist who performs an experiment has no idea what the outcome of the experiment is going to be. True or False

Why should a truck have an engine that can produce more force than a regular car? A) "Net forces" do not affect cars and trucks the same way.

How does a electron travel through a closed circuit?

Most people can detect frequencies as high as 20 000 Hz. Assuming the speed of sound in air is 345 m/s, determine the wavelength of the sound corresponding to this upper range of audible hearing.