7. A drum corps can be heard practicing at a distance of 1.6 km (about 1 mile) from the field. What is the time delay between the drumstick hitting the drum and the sound heard by an individual 1.6 km away?
(Assume the speed of sound in air to be 340 m/s.)
1 km - 1000m convert km to meters then find out the time

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.

What is the measurement of how fast an object moves relative to a reference point?

Which is not true of the intertropical convergence zone? a) it features heavy precipitation b) it's where the trade winds collidec) it's a high-pressure zone with sinking air d) it is also known as the doldrums