Relate the output of energy from a heat engine to the energy put into the heat engine, considering the second law of thermodynamics.

Which letter represents the wavelength of the wave? a. a.

Eukaryotic that can reproduce sexually contain two types of cells

When an explanation to a problem is accepted as always true, it is a. law theory hypothesis fact?

The reflection of a 10.0 cm object appears to be 18 cm tall and 9 cm behind the mirror. What distance is the object from the mirror?

All atoms of the element potassium have 19 protons. One of the most stable types of potassium atoms has the mass number 39. How many neutrons make up one of these potassium atoms? A. 19 B. 29 C. 38 D. 58

Cardiovascular exercise can

Kathy tests her new sports car by racing with Stan, an experienced racer. Both start from rest, but Kathy leaves the starting line 1.00 s after Stan does. Stan moves with a constant acceleration of 3.1 m/s2 while Kathy maintains an acceleration of 4.

A 0.0010-kg pellet is fired at a speed of 50.0m/s at a motionless 0.35-kg piece of balsa wood. When the pellet hits the wood, it sticks in the wood and they slide off together. With what speed do they slide?

Jim measures the count rate of a sample of americium-241 as 120cpm. Roughly how long would it take for the count rate to fall below 4 cpm. Show your working

Explain and give an example of newtons 3rd law of motion