A large artery with a cross-sectional area of 1.00 suddenly splits into 10 smaller ones, each with an average cross-sectional area of 0.200 . The fluid velocity in the large artery was 40 cm/s. What is the new velocity of the fluid passing through the smaller arteries?

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.

A100-watt light bulb illuminates a solar cell. the electricity from the solar cell operates a water pump that delivers 1 watt of power. what is the efficiency of the system?

If element x has 99 protons how many electrons does it have