A chainsaw used 4000 J in 180 s. Calculate the power used, in watts.

What is the highest number of beats our ear can hear in a second?

A scientific law is A. the same as a hypothesis B. a description of natural events C. an explanation of a scientific observation D. the conclusion of a scientific experiment.?

What happens when sodium undergoes a chemical reaction with chlorine?

A car accelerates from rest at 4 m/s^2. What is the velocity of the car after 4 seconds?

You drive your car 2 km to the gas station, 4 km to the shopping mall to let your mother off, and 4.5 km back home. The trip takes 20 min. What is your velocity in m/s? -9 m/s +4 m/s 0 m/s -3 m/s

StarsA. begin as protostars, which fire up when they collapse and become denser and hotter. B. create elements by splitting the nuclei of small atoms into the nuclei of larger atoms. C. have unlimited amounts of fuel and therefore exist indefinitely.

The "atomic weight" of an atom reflects the average number of A) protons. B) neutrons. C) electrons. D) protons + neutrons. E) protons + neutrons + electrons.

How fast would a 2-kilogram object need to move to have the same kinetic energy as a 4-kilogram object moving at 8 meters per second?

The frequency of the George Washington Bridge is 2.05 Hz. What is its period?

Is speed and average speed the same thing?