In a machine, work output is less than work input because some energy is converted into thermal energy. true or false.

When bonds between atoms are broken or formed, what is the outcome? A. a physical change B. an element increasing in size C. a chemical change D. a change of state

Generally you must stir a can of paint before you use it ... is paint miscible or immiscible? explain

5 renewable energy resources i have nuclear, solar, wind what am i missin?

National parks and wilderness areas are designed to do which of the following A) provide areas for recreation B) protect wildlife and endangered species C) preserve endangered areas D) all of the above

A speaker's frame of reference and a listener's frame of reference will never be exactly the same. a. True b. False

A thermometer is placed in water in order to measure the water's temperature. What would cause the liquid in the thermometer to rise? A. The molecules in the water move closer together. B. The molecules in the thermometer's liquid spread apart. C.

If 30ml of a fluid has a mass of 63g what is it's density

If we double the mass of the sun, what would happen to the gravitational force between the sun and earth?

Why was Wegner's theory of continental drift not accepted by the scientific community? he had no friends in the community he could not explain how the continents moved his suggestion of land bridges was not accepted he could not explain why the

Which phrase accurately describes erosion? A. breaking rocks into smaller pieces and reforming them into new rockB. forming rocks and depositing them in new placesC.