Imagine that Jessica and Donovan both performed an experiment with different tools. The experiment was to find out which surface allowed a toy car to travel the farthest. Jessica performed the experiment and measured in centimeters. Donovan performed the experiment and measured in seconds. Which option best compares the difference in observations between Jessica’s and Donovan’s tools?Jessica’s measurement will answer the question. Donovan’s measurement will answer the question. Donovan’s measurement will not answer the question. Jessica’s measurement will not answer the question. Donovan’s measurement will answer the question. Jessica’s measurement will not answer the question. Jessica’s measurement will answer the question. Donovan’s measurement will not answer the question.

Suppose water is leaking from a tank through a circular hole of area ah at its bottom. when water leaks through a hole, friction and contraction of the stream near the hole reduce the volume of water leaving the tank per second to cah 2gh , where c (0 < c < 1) is an empirical constant. a tank in the form of a right-circular cone standing on end, vertex down, is leaking water through a circular hole in its bottom. (assume the removed apex of the cone is of negligible height and volume.) (a) suppose the tank is 20 feet high and has radius 8 feet and the circular hole has radius 2 inches. the differential equation governing the height h in feet of water leaking from a tank after t seconds is dh dt = − 5 6h3/2 . if the height of the water is initially 8 feet, how long will it take the tank to empty? (round your answer to two decimal places.)

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?

Amagnetic field applies forces on: a)static chargesb)moving chargesc)water flow