Stellar distances are usually expressed in what units called?

A car travels 200 km SE for 5 hours. What is the car's velocity?

Jesse wants to know how well a particular brand of car wax protects his car from dirt. Which of the following is a variable that must be kept constant? a. The use of the car wax b. How dirty the car gets c. The kind of car

If the vertical displacement from crest to trough is 0.50 cm, what is the amplitude? 1 cm .5 cm .25 cm

A 54 kg man holding a 0.65 kg ball stands on a frozen pond next to a wall. He throws the ball at the wall with a speed of 12.1 m/s (relative to the ground) and then catches the ball after it rebounds from the wall.

Light can travel through a medium, but it does not require a medium. true or false

A toy helicopter begins flying across a field with a speed of 3 m/s and an acceleration of 0.8 m/s2. How long does it take the helicopter to reach a speed of 7 m/s?

A 50.0 kg child stands at the rim of a merry-go-round of radius 1.50 m, rotating with an angular speed of 3.00 rad/s. (a) what is the child's centripetal acceleration? incorrect: your answer is incorrect.

Do all types of waves need a medium to travel through

What feature of the ocean basin is formed when old oceanic crust is forced under continental plates

Thermal energy from the Earth's core heats rock and creates magma. This hot magma then rises toward the Earth's surface, cools, and sinks back down toward the Earth's core. Which actions below occur during this process? (multiple answers) A.