Ice floats in water because it
is less dense than water
contains more oxygen than water
has a higher ph than water
has more surface tension than water

The human body stores chemical energy from digested food. some of the chemical energy is converted into mechanical energy when the body moves. which statement best supported by this information

What is the average speed of a car that travels 40mph for 1 hour and 60 mph in another hour will mark brainliest

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.