If the entropy change for a system at 100.0 c is - 20.0 J/K, then which of the following describes the heat?

A) 2.00 kJ heat added

B) 2.00 kJ heat removed

C) 7.46 kJ heat added

D) 7.46 kJ heat removed

The weight of 80 kg of mass on mercury is 296 N and almost identical to the weight of the same mass on Mars but mercury has much less mass than Mars explain how this can be. (what else could affect gravitational force?)

Compare the motion of the particles when the frequency is high to the low-frequency motionHow would you describe the difference?

Which are uses of electromagnetic waves? Check all that apply. cooking foods insulating buildings using heat lamps transmitting radio signals using medical imaging lighting rooms cooling refrigerators

A person looks across a stadium at the scoreboard, which appears blurry. The person looks down at the program, which is completely in focus. What vision condition is described? a) color blindness b) astigmatism c) farsightedness d) nearsightedness

if a 10 kg object has a kinetic energy of 20 J what is its speed and what is the formula used to calculate speed

What is the molar mass of an ideal gas if a 0.800 g sample of this gas occupies a volume of 200. mL at 50.0 oC and 720. mm Hg?

When unequal resistors are connected in parallel in a circuit,?

A piano tuner hears three beats per second when a tuning fork and a note are sounded together and six beats per second after the string is tightened. What should the tuner do next, tighten or loosen the string? Explain.

How much work is done? A Net Force of 9.0 N acts through a distance of 3.0 m in a time of 3.0 s. The answers are 3.0 J, 9.0 J, 27 J, 81 J.

Two capacitors are identical except that they have different insulators in the gap between the conductors. Capacitor A has an air filled gap while capacitor B uses a material with dielectric constant 3 to keep the conductors apart.