If mass = 30kg, gravity = 10 N/kg and height is 2m of a car. Calculate the gravitational potential energy.

When a bow an arrow is fired, how does the size of the force of the bow on the arrow compare of the arrow on the bow

How would you describe the two projectors used to screen a 3D movie? A) Both projectors have vertical polarizers. B) One projector has a vertical polarizer and the other has a horizontal polarizer. C) Both projectors have horizontal polarizers.

What is a compound? a poly element pure substance a homogenous mixture a single element pure substance a heterogeneous mixture

If M is 10 kg and Fa = 100N and there is no friction, what will the acceleration of M be?

What is the most likely reason that a hypothesis would be useful even if experiments show that it is false? New hypotheses and experiments can be developed that better fit the observations made during the original experiments.

Why do responsible consumers use credit and credit cards?

According to Ptolemy's model of the movement of celestial bodies, A. the sun is the center of the universe. B. the earth rotates around the moon. C. planets orbit in circular paths around the earth. D. the earth rotates around the sun.

What is an organ that has villi to absorb the nutrients

Assume you are a Medieval knight attacking a castle with a cannon. The ball leaves the cannon with a speed of 47.7 m/s. The barrel's angle with respect to the ground is 43.

0.005 kg of copper was heated from 20°C to 80°C. How much energy was used to eat Cu? (Specific heat capacity of Cu is 385 J/kg °C)