Which two actions would weaken an electromagnet? O A. Replacing a 6 V battery with a 9V battery B. Replacing the hollow core of the magnet with a steel core O c. Replacing the steel core of the magnet with a plastic core D. Decreasing the number of wraps of wire E. Increasing the number of wraps of wire

Two friends are having a conversation. anna says a satellite in orbit is in freefall because the satellite keeps falling toward earth. tom says a satellite in orbit is not in freefall because the acceleration due to gravity is not 9.80 m/2 . who do you agree with and why?

Acurve connects the data points that are plotted. (physical science chapter 11 motion)

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.