A ball with a mass of 2 kg rolls on a flat surface. It starts rolling with an initial velocity of 2 m/s, and after a while, its velocity drops to 1.8 m/s. What is the final energy of the ball? a. 1.8 J
b. 4 J
c. 3.24 J
d. 2 J

The field between two charged parallel plates is kept constant. if the two plates are brought closer together, the potential difference between the two plates either a) decrease b) does not change c) increase?

The weights of bags filled by a machine are normally distributed with a standard deviation of 0.05 kilograms and a mean that can be set by the operator. at what level should the mean weight be set if it required that only 1% of the bags weigh less than 9.5 kilograms? round the answer to 2 decimal places.

Aspacecraft that renters the earth’s atmosphere drastically slows down. the amount of kinetic energy the spacecraft has as it reenters the earths atmosphere