If scientist sent light waves to four different objects in space, which would take the longest to bounce the wave back to earth

The speed of any sound wave as it travels through a medium is dependent mainly on the?

Two cars are travelling side by side down a straight road in opposite directions. Both cars are travelling at a speed of 22m/s. What is their relative speed?

What is the mass of an object traveling at 20 m/s with a kinetic energy of 4000 J?

Which of the following proved that the de broglie's equation was correct? A) Einstein theory of relativity B) Planck's equation C) quantum mechanics D) Davisson-Germer experiment

What is the gravitational force on a 10 kg sled traveling at 3.5 m/s down a track? a. 9.8 N b. 3.5 N c. 35 N d. 98 N

Comparing and contrasting ionic and covalent bonds?

Elevation above sea level is called

The train traveled 500 kilometers north to Odessa in 2 hours. What's the train's speed? What is the velocity?

Are microwaves and radio waves faster or slower than other types of electromagnetic energy?

If you dive under-water, you notice an uncomfortable pressure on your eardrums due to the increased pressure. The human eardrum has an area of about 70 mm2 (7*10-5m2), and it can sustain a force of about 7 N without rupturing.