A Carnot engine takes 3000 J from a reservoir at 600 K, does some work, and discards some heat to a reservoir at 300 K. What is its efficiency?

50%

60%

20%

30%

What is capacitance? A. The amount of charge stored per volt B. The amount of force coulomb C. The amount of potential per volt D. The amount of energy per charge

Satellites are objects that revolve around another in space. Satellites with sufficient velocity will move in an almost circular or elliptical path around the Earth. Which of Newton's laws of motion applies to the satellite in orbit around Earth?

What does force equal?

A ball is released at the top of a ramp at t = 0. which is the speed of the ball at t=4

A curve of radius 40 m is banked so that a 1100 kg car traveling at 40 km/h can round it even if the road is so icy that the coefficient of static friction is approximately zero. The acceleration of gravity is 9.81 m/s 2.

If the graph represents speed what is measured on the x and y axes

It is difficult to lift a heavy stone than the lighter one on the earth, why?

The vapor pressure of ethanol at 25 degrees C is 7.83 kPa. Calculate the vapor pressure in atm. Round answer to 3 significant digits.

According to Newton's second law of motion acceleration or an object depends upon the ___ of the object and the ___ Acting on it. I'm confused on what the blanks are. I can't find them.

What is the concentration of H + ions at a pH = 7?