A heat engine has a hot reservoir of 680°C and a cold reservoir of 220°C. What is the efficiency of the engine?

Two light bulbs are wired in series and one bulb burns out (opens). Technician A says that the other bulb will work. Technician B says that the current will increase in the circuit because one electrical load (resistance) is no longer operating.

What is the resultant velocity of a plane that is traveled at 245m/s, north and encounters a tailwind of 55m/s?

According to einstein's general theory of relativity, why does light take a curved path when passing near a galaxy?

A force of 5 N accelerates an object. The object's mass is 50 g. What is the acceleration of the object? (Formula: F=ma)

How many joules are in 1 kilowatt hour?

you often hear people particularly TV announcers talk about "high rate of speed" what do you think they mean according to the specifics of physics definitions what are they really saying

What is the value of x in the equation Ix - 3y = 30, when y = 15?

32. How much work is done pushing an 80 N box 2 m across ue surtout What work is done? a. 40 J c. 160 J b. 20 J d. 240 J

Which is a resource that the National Park Service manages? A. memorials B. wildlife refuges C. ecosystems D. endangered species

Write two examples (mathematical expression) of physical laws that change inversely with the square of the distance.