You drivd a car over the top of a hill, the cross section of the road can be approximated by a circle of radius R=400 m. What is the greatest speed at which you can drive without the car leaving the road at the top of the hill. Let g=9.8

Which is the correct symbol for an isotope of iodine with 53 protons and 78 neutrons?

Arigid tank is divided into two equal parts by a partition. one part of the tank contains 3 kg of compressed liquid water at 400 kpa and 60°c while the other part is evacuated. the partition is now removed, and the water expands to fill the entire tank. determine the entropy change of water during this process, if the final pressure in the tank is 40 kpa. use steam tables.

Acapacitor is storing energy of 3 joules with a voltage of 50 volts across its terminals. a second identical capacitor of the same value is storing energy of 1 joule. what is the voltage across the terminals of the second capacitor?