What is the average speed of a train that covers 80 km in 1 h, 200 km in 2 h, and 420 km in 4 h?

Kuiper Belt objects are composed of which substances? Select all that apply. A. Iron B. Silicon C. Water D. Methane E. Ammonia

When you ride a roller coaster that makes sharp turns, you feel yourself being pushed to one side. Use Newton's first law of motion to explain this phenomenon

Explain why the person heard the thunder after seeing the lightning

Who first described the double-helix structure of DNA?

You shoot a model rocket into the air with a speed of 18.2 m/s. now high does the rocket go?

Fill in the blanks to complete each statement about the heating of Earth's surface. Earth takes in thermal energy from the Sun in a process called Sunlight strikes Earth's surface at different angles. This angle is called the angle of Done Intro

A 2.0-kg block is on a perfectly smooth (frictionless) ramp that makes an angle of 30^/circ30 ∘ with the horizontal. What is the force of the ramp on the block?

What is the difference between negative displacement and negative velocity?

How to use Da Vinci flying pedulum clock

A 7.00 kg mass is being pulled by a 53.8 n force what is the acceleration