A baseball leaves a pitcher's hand spinning at a rate of 26.2 rad/s, and makes 4.25 revolutions before it reaches home plate. What is the baseball's velocity as it arrives at home
plate, if it slows at a constant rate of -6.5 rad/s^2?

Taylor's experiment: 1. accurately measured the speed of light 2. locked together the phases of two light sources so that the interference pattern would not shift 3. showed that man's reaction time was much slower than the speed of light 4. showed that individual photons have wave characteristics

Amira pulls a 3 pound wagon 4 feet. how much work has she done?

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.