Calculate potential energy of a 5 kg object sitting on 3 meter ledge

Does an electromagnetic waves speed affected by the changes in media?

If Sally is standing on a 200m tall cliff and throws a ball at 40m/s at a 30° angle to the horizontal: a. What is the ball's initial velocity in the y direction? b. What is the ball's velocity in the x direction? c.

Twenty students were surveyed to find out how many hours of tv they watch during a school week

Complete this equation that represents the process of nuclear fission. Superscript 239 Subscript 94 Baseline P u + Superscript 1 Subscript 0 Baseline n yields Superscript A Subscript B Baseline B a + Superscript 91 Subscript 38 Baseline S r + 3

Acids weaken some substances. Bacteria in your mouth acts on sugar and produces acids. What would be the end result of this chemical reaction between your teeth and the acid produced?

A constant force is exerted for a short distance on a block of mass that is initially at rest on a horizontal frictionless plane. This force gives the block a certain final speed v.

A football quarterback is moving straight backward at a speed of 3.00 m/s when he throws a pass to a player 20.0 m straight downfield. (a) if the ball is thrown at an angle of 25.

Simone is walking her dog on a leash. The dog is pulling with force of 34 N to the right and simone is pulling backward with a force of 16 N

An object moves with velocity v (t) = t^2-8t+7 a) write a polynomial expression for the position of the particle at any time t greater or equal to zero.

Is a lack of thorns a mutation? (on a plant)