Why does a catalyst cause a reaction to proceed faster?

A man is sitting on a 20 m height building and his mass is 50 kg. Calculate the mechanical energy.

A hockey puck (m=0.2kg) is dragged by a force of 10N. What is it's acceleration

A model rocket is fired vertically from the ground with a constant acceleration of 45.3 m/s2 for 1.46 s at which time its fuel is exhausted. What is the maximum height (in m) reached by the rocket?

You are skiing in ... preparation for a competition. being a dedicated physics student, you happen to have a scale with you. you notice that the mountainside provides you with 346 n of support force. the snow under your wooden skis is fairly wet.

What are the 12 colors of the spectrum called?

Define Mechanical energy. Using an example of the pendulum, explain how kinetic and potential energy relate to the mechanical energy at different positions.

A 8 kilogram cat is resting on top of a bookshelf that is 2 meters high. What is the cat's gravitational potential energy relative to the floor?

A piece of wood has a volume of 4.6 cm to the power of 3, and a mass of 3.7 g what is the density of the wood

For the reaction a → b, the rate law is: rate = k * [a]. over the course of 4 minutes, the concentration of a reduces by one-half, from 1.00 mto 0.50 m. how is the rate affected?

The color of a substance is a physical property