A Carnot engine operates with a cold reservoir at a temperature of 474 K and a hot reservoir at a temperature of 628 K. What is the net entropy change (in J/K) as it goes through a complete cycle? slader

The battery charger for an MP3 player contains a step-down transformer with a turns ratio of 1:32, so that the voltage of 120 V available at a wall socket can be used to charge the battery pack or operate the player.

22.0-kg child is riding a playground merry-go-round that is rotating at 40.0 rev/min. What centripetal force is exerted if he is 1.25 m from its center? (b) What centripetal force is exerted if the merry-go-round rotates at 3.00 rev/min and he is 8.

How does the amplitude and phase of the output voltage depend on the values of the resistor and the capacitor?

You have two pieces of wire that allows electrons to pass through them when they are connected to each other. If you insert a piece of rubber between the wires, the electrons do not flow. The rubber material is?

You are skiing down a mountain with a vertical height of 1000 feet. the distance from the top of the mountain to the base is 2000 feet. what is the angle of elevation from the base to the top of the mountain?

How did astronomers precisely determine the length of an Astronomical Unit in the 1960s?

If a 1.50 kg mass revolves at the end of a string 0.50 m long, and its tangential speed is 6.0 m/s, calculate the centripetal force.

Balanced forces can change an object's direction. A. True B. False

The state of matter that has particles that slide by one another

Temperature is usually measured in degrees with a (n)