Give the expressions for the following: 1. Restoring force of an oscillating spring-block system.
2. Restoring force in an oscillating simple pendulum.
3. Elastic potential energy of a spring block system.
4. Total energy in a simple pendulum.
5. Velocity of a wave on a string.

wind moving at higher speeds will transfer more energy to the water, resulting in stronger waves.

the old price per ounce is c/4.

the new price per ounce is c/3.6.

the ratio of the old price to the new one is

(c/4)/(c/3.6) = (c/c)×(3.6/4) = 0.9 . . = 9/10 . . "nine tenths" in either form

technology is the application of the knowledge gained by science.