Compare distance-time graphs and velocity-time graphs.

*drag each tile to the correct location in the sequence* the table shows chronological events in the life of our sun, a medium-sized star. place the missing events into the correct rows of the table.

What is the efficiency of an engine that does 80 j of work and exhausts 320 j of heat while taking in 400 j of heat ? a. 10% b. 20% c. 80% d. 25%

How does the strength of the electrostatic force between an electron and a proton compare to the strength of the gravitational force between them?