A hockey player skates across a rink of length 75 m in 8.9 seconds. a. What is the average speed of the hockey player? (2 points)

b. The hockey player is moving at a speed of 9.5 m/s. If it takes him 2 seconds to
come to a stop under constant acceleration, how far does he travel while
stopping? (2 points)

The plum pudding model of the atom states that ?

In positive numbers less than 1, the zeros between the decimal point and a non-zero number are blank significant

An insulated 40 ft^3 rigid tank contains air at 50 psia and 120°f. a valve connected to the tank is now opened, and air is allowed to escape until the pressure inside drops to 25 psia. the air temperature during this process is kept constant by an electric resistance heater placed in the tank. determine the electrical work done during this process.