Which of these is an example of a physical change?

Question 5 options:

grinding pepper

baking a cake

lighting up a grill

toasting bread

IF a particular galays has a total mass of 10 to the 59 grams and the average star in that galaxy has a mass of 10 to the 34 grams, approximately how many stars are there in that galaxy?

A wave has a wavelength of 10 mm and a frequency of 5 hertz. what is its speed?

You have a radioactive sample with a half-life of 1 hour. At t = 1 hour, a Geiger counter measures its radiation at 40 counts/minute. At t = 4 hours, it measures 5 counts/minute.

If a rocket travels 5600. km in 3.00 hours, what's it's speed?

Describe, in detail, an experiment in which you could determine the power for a period of several hours. You must be able to tell how to measure the force and the distance to calculate work or your example will not be accepted.

Calculate if an electric hair dryer uses 2,400 j of energy in 2 s, what is its power?

Which of the following choices best represents a potential stressor?

How do you distinguish between speed, velocity, and acceleration?

The force of friction on a sliding object is 10n. the applied force needed to maintain a constant velocity is:

What is the best hypothesis to use for this investigation