A standing wave is a wave that travels through space indefinitely. True or false

1.) if you are sitting still are you accelerating? How do you know? 2.) you're on a skateboard, moving very fast but at a constant speed. are you accelerating? 3.) Lara claims that if an object is accelerating it must be moving.

Let at time t1 means?

If the temperature of the steam in a pwr is 315°c (600°f), what is the maximum efficiency obtainable from the power plant?

Ionic compounds form crystal structures. molecular structures. pure elements. neutral elements

A car starts from rest and increases its speed to 18 m/s in 22 seconds. What is the cars acceleration

Ron bicycles forward with an acceleration of 2.1 m/s2. If he is applying a forward force of 195 N, what is his mass?

Diane swim 5 kilometers against the current in the same amout of time it took her to swim 15 kilometers with the current. The rate of the current was 2 kilometers per hour. How fast would diane swim if there were no current?

A man paddles a canoe in a long, straight section of a river. The canoe moves downstream with constant speed 5 m/s relative to the water. The river has a steady current of 1 m/s relative to the bank. The man's hat falls into the river.

In an atom, almost all of the mass is concentrated in a tiny nucleus because

A truck travels down the highway at a speed of 110 km/hr. How long does the trip last if the truck covered 2200km?