Arigid copper tank, initially containing 1 m3 of air at 295k, 5 bar, is connected by a valve to a large supply line carrying air at 295k, 15 bar. the valve is opened only as long as required to fill the tank with air to a pressure of 15 bar, at which point the air in the tank is at 310k. the copper tank, which has a mass of 20 kg, is at the same temperature as the air in the tank, both initially and finally. the specific heat of the copper is c = 0.385 kj/kg-k. assuming ideal gas behavior for the air, determine (a) the initial and final mass of air within the tank, each in kg, and (b) the heat transfer to the surroundings from the tank and its contents, in kj, ignoring kinetic and potential energy effects. (630)

If forces acting on an object are unbalanced, which factors may result fron an unbalanced force? check all that apply

What is a costume plot? why is it important to a film or theater production?

An charge with mass m and charge q is emitted from the origin, (x,y)=(0,0). a large, flat screen is located at x=l. there is a target on the screen at y position y(h), where y(h) > 0. in this problem, you will examine two different ways that the charge might hit the target. ignore gravity in this problem. 1.assume that the charge is emitted with velocity v(0) in the positive x direction. between the origin and the screen, the charge travels through a constant electric field pointing in the positive y direction. what should the magnitude e of the electric field be if the charge is to hit the target on the screen? express your answer in terms of m, q, y(h), v(0), and l. 2.now assume that the charge is emitted with velocity v(0) in the positive y direction. between the origin and the screen, the charge travels through a constant electric field pointing in the positive x direction. what should the magnitude e of the electric field be if the charge is to hit the target on the screen? express your answer in terms of m, q, y(h), v(0), and l.