1. Which of the following is true about sound waves? They move faster than light.
They make wind.
They vibrate the air.
They move slower in water than in air.

(a) assume the equation x = at^3 + bt describes the motion of a particular object, with x having the dimension of length and t having the dimension of time. determine the dimensions of the constants a and b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.) (b) determine the dimensions of the derivative dx/dt = 3at^2 + b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.)

Pearl labels a diagram of a charged capacitor as shown. which change would correct the error in the diagram? changing +2q to +q changing +2q to –2q reversing the direction of the arrows reversing the labels for conductors and insulator

The evaporation losses from a reservoir of constant surface area of 500 acres are 150 acre ft per day. of the outflow from the reservoir is 50 cfs, determine the change in the water level of the reservoir in a day without inflow. gupta, ram s.. hydrology and hydraulic systems (page 59). waveland press, inc.. kindle edition.