Which of the following describes a chemical change

A. burning paper

B. freezing water

C. melting ice

D. bending a wire

A scuba diver measures an increase in pressure of around 105 Pa upon descending by 10 m, what is the change in force per square centimetre on the diver's body?

Fingernails and muscles are made of proteins, which are polymers of

A force of 125 N is applied to a 50 kg. Mass. What is the acceleration of the mass?

What causes some objects' motion to change?

Which of the following is NOT a field force? A. Magnetism B. Gravity C. Friction D. Electricity

The distance from home plate to the pitchers mound is 18.5 meters. For a pitcher capable of throwing at 3.85m/s (86mi/hr), how much time elapses between the release of the ball and the ball passing home plate?

A squirrel sitting on the ground starts to run with an acceleration of 5.1 m/s 2. How fast is the squirrel going after 0.25 seconds? A. 20.4 m/s B. 1.28 m/s C. 0.49 m/s D. 3.1 m/s

Describe how the competition between invasive and native species might affect a food web

Which vector should be negative? any vector whose magnitude is less than 1 a displacement in the direction North any vector whose magnitude is greater than 1 the velocity of a falling object

Acceleration is a scalar quantity true or false