In a motorcycle engine, a piston is forced down toward the crankshaft when the fuel in the top of the piston cylinder undergoes combustion. the mixture of gaseous combustion products then expands adiabatically as the piston descends. find the average power in (a) watts and (b) horsepower that is involved in this expansion when the engine is running at 3500 rpm, assuming that the gauge pressure immediately after combustion is 15 atm, the initial volume is 54 cm3, and the volume of the mixture at the bottom of the stroke is 230 cm3. assume that the gases are diatomic and that the time involved in the expansion is one-half that of the total cycle.

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up

Which lists the pairs of plates in order from least to greatest in terms of the work done to move the electron?

Astudent throws a water balloon with speed v0 from a height h = 1.76 m at an angle θ = 21° above the horizontal toward a target on the ground. the target is located a horizontal distance d = 9.5 m from the student’s feet. assume that the balloon moves without air resistance. use a cartesian coordinate system with the origin at the balloon's initial position. (a) what is the position vector, rtarge t, that originates from the balloon's original position and terminates at the target? put this in terms of h and d, and represent it as a vector using i and j. (b) in terms of the variables in the problem, determine the time, t, after the launch it takes the balloon to reach the target. your answer should not include h. (c) create an expression for the balloon's vertical position as a function of time, y(t), in terms of t, vo, g, and θ. (d) determine the magnitude of the balloon's initial velocity, v0, in meters per second, by eliminating t from the previous two expressions.