The force between a proton and an electron is 3.5×10-10 N. Each has a charge of 1.6×10-19 C What is the distance between these two particles?

Which of the following is considered to be a vector?               a.  temperature    b.  velocity    c.  time    d.  mass

Jessie ran 5000 meters from the cops and an average speed of 6 meters / second before he got caught . how long did he run?

Awater-filled u-tube manometer is used to measure the pressure inside a tank that contains air. the water level in the u-tube on the side that connects to the tank is 5 ft above the base of the tank. the water level in the other side of the u-tube (which is open to the atmosphere) is 2 ft above the base. determine the pressure within the tank.