Antonina throws a coin straight up from a height of

1

.

2

m

1.2m1, point, 2, space, m above the water surface in a fountain. the coin strikes the water

1

.

3

s

1.3s1, point, 3, space, s later. we want to know the vertical velocity of the coin at the moment it strikes the water. we can ignore air resistance.

which kinematic formula would be most useful to solve for the target unknown?

Scout feels ill one day before school. her mother puts a thermometer in her mouth and the temperature begins to climb to 100°f. what is happening between the cooler thermometer and scout's body? a) scout's body is applying a force to the particles in the thermometer. b) kinetic energy is being transferred from her mouth to the thermometer. c) potential energy is being lost by the thermometer and gained by scout's body. d) the potential energy stored in foods is converted to mechanical energy to raise the mercury in the thermometer.

Which best represents the law of conservation of mass ?

Awind turbine is rotating counterclockwise at 0.5 rev/s and slows to a stop in 10 s. its blades are 20 m in length. (a) what is the angular acceleration of the turbine? (b) what is the centripetal acceleration of the tip of the blades at t=0s? (c) what is the magnitude and direction of the total linear acceleration of the tip of the blades at t=0s?