Which of the following is not one of the reasons to properly warm up before exercising?
A. Develop overall flexibility.
B. Increase blood flow to the muscles and raise body temperature.
C. Prevent injuries such as strains sprains and muscle cramps.
D. Return heart rate to resting levels.

The period of a pendulum varies directly as the square root of the length of the pendulum and inversely as the square root of the acceleration due to gravity. find the period when the length is 144 cm and the acceleration due to gravity is 980 cm per second squared, if the period is 7pi seconds when the length is 289 cm and the acceleration due to gravity is 980 cm per second squared.

Part of a control linkage for an airplane consists of a rigid member cb and a flexible cable ab. if a force is applied to the end b of the member and causes it to rotate by θ = 0.5°, determine the normal strain in the cable. originally the cable is unstretched.

The velocity of sound wave in air at 35°c is 353m/s, calculate the velocity of sound at 46°c