A heat engine with a high-temperature reservoir at 400 k has an efficiency of 0.20. what is the maximum possible temperature of the cold reservoir?

Which has a larger volume: 2g aluminum or 2g water?

Which best describes a graph of voltage over time for DC current? sine curve straight, horizontal line parabolic curve sawtooth wave

Does anyone know how to do this question? Force = 7kN Pressure = 1mPa Area = ?

What happens to the mass of the substance when undergoing a physical change

Voltage is necessary in order for A. current to flow. B. low resistance to build up. C. high resistance to build up. D. an open circuit to be constructed.

Which of the following scientists is incorrectly paired with their major discovery? Henri Becquerel - radioactivity Charles Darwin - theory of evolution James Hutton - rock cycle Charles Lyell - faunal succession

What units are used in the periodic table for atomic mass?

A construction foreman exerts 1300 Newtons of force trying to move a 1200-kg block of concrete. How many Joules of work does he perform?

It takes 9 seconds for a 10 newton force to move an object 4 meters to the right. What are the direction and magnitude of this force? A. The direction is to the right. The magnitude is 9 seconds. B. The direction is 4 meters.

West of a city, a certain eastbound route is straight and makes a steep descent toward the city. The highway has a 14% grade, which means that its slope is - 14 100.