Fariza wears a red hat in her school play. On stage, she is lit by a spotlight shining only green light. When our eyes receive no light from an object, it looks black. Explain why Fariza's hat looks black on stage.

Which object has the greatest momentum? A truck parked on the street. A man walking up a flight of stairs. A race car going around a turn at high speed. A bicyclist rolling downhill. A salmon swimming upstream.

What force causes a wagon to speed up as it rolls down a hill?

Eric rode 2 kilometers on his bike. His sister jay rode 3000 meters on her bike. Who rode the farthest and how much farther did they ride (answers in km) ?

If a ball is thrown straight up into the air with an initial velocity of 45 ft/s, it height in feet after t second is given by y=45t-16t2. Find the average velocity for the time period begining when t=2 and lasting. 0.1 seconds?

Calculate the acceleration of a 25 kg object that has move the force of 300 n

Dos pelotas de tenis se lanzan verticalmente, hacia arriba y desde el mismo punto, con 2 s de diferencia. La velocidad inicial de la primera es de 20 m/s, y la de la segunda, de 30 m/s.

How much work is done when a 48-kg stack of books are lifted 2m with a net force of 25 N? A. 12.4 J B. 100 J C. 50 J D. 96 J ... ?

What is internal energy?

If objects A and B are separately in thermal equilibrium with a third object C, then A and B are in thermal equilibrium with each other. This law is called a. First law of thermodynamics b. Zeroth law of thermodynamic c. Second law of thermodynamics

Physical science unit 4 lesson 10