An ideal machine has an efficiency of 100%

A 2.44 gram penny is on a turn table. It starts from rest at a radius of 0.136 meters and the turn table speeds up until the penny flies off with a tangential speed of 0.574 m/s. a.

What is true about the structure or function of the plasma membrane? Hydrophilic molecules attract the water the cell requires. The double layer prevents anything from entering the cell. The processes of endocytosis and exocytosis occur here.

How does the temperature of the Earth's mantle compare to the other layers of the Earth? A) The mantle is hotter than the core. B) The mantle is hotter than the crust. C) The mantle is the same temperature as the core.

What is the difference between mass and momentum?

1. The term acceleration was used in paragraphs 1-3. Which of the following could be a definition of acceleration? A. A change in an object's speed B. At object at rest C. A change in an object's direction D. Both A and C

Which physical property of iron made it popular for use in weapons? 1. Magnetism 2. Luster 3. Malleability 4. Ductility

a 2 kg rock is dropped from the top of a 30 m High building calculate the ball at the time that it strikes the ground

Water, with a density of rho = 1145 kg/m 3, flows in a horizontal pipe. In one segment of the pipe, the flow speed is v 1 = 7.33 m/s. In a second segment, the flow speed is v 2 = 1.57 m/s.

What does the color of a star determine

Scientific cosmology Choose one: A. investigates the overall structure and history of the Universe. B. pertains to legends and verbal history about the beginnings of the Universe. C. proves the Big Bang theory. D.