74. Someone squirts water from a hose at you on a hot summer day. You see the water coming and react by putting your hands up in front of your face to keep the water out of your eyes.
Describe the chain of evens involved with vision and the brain that allows you to shield
your face from the water.

Who was the first scientist to measure speed as distance over time?

Henry, whose mass is 95 kg, stands on a bathroom scale in an elevator. the scale reads 830 n for the first 2.4 s after the elevator starts moving, then 930 n for the next 2.4 s. part a what is the elevator's speed 4.8 s after starting? express your answer with the appropriate units.

An important dimensionless parameter concerned with very high-speed flow is the mach number, defined as v/c, where v is the speed of the object such as an airplane or projectile, and c is the speed of sound in the fluid surrounding the object. for a projectile traveling at 1170 mph through air at 50 ˚f and standard atmospheric pressure, what is the value of the mach number?