Three toy boats with the same mass were in a lake. The blue boat's initial speed was 8 km/hr. Its final speed was 3 km/hr. The
orange boat's
intial speed was 0 km/hr, and its final speed was 5 km/hr. The gray boat's
initial speed was 12 km/hr and its final speed was 17 km/hr. Two boats were
moving and one was stopped. Each boat got bumped by another boat, but
not in the same direction. All the boats changed speed as a result of being
bumped. Which toy boat(s) experienced the strongest force when it was
bumped? How do you know?*

Thomas his older brothers, who own a junk yard, on the weekends to earn extra money. he likes to them push broken-down cars to the back of the junk yard because it makes him feel strong. last saturday, they pushed three cars with different weights, and he noticed he used different amounts of force for each one. the cars were the following weights: white car: 2,700 kg red car: 1,500 kg blue car: 2,100 kg think about how much force is needed to move each car. which correctly lists the cars in order from the most to least amount of force needed to move them? a) white, blue, red b) blue, red, white c) red, white, blue d) white, red, blue

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.)

Diamond will scratch quartz. true or false