A machine has an efficiency of 80% how much work must be done on the machine so to make it do 50000 J of outfit work

A student heats water as shown in the diagram below. What sort of energy transformation is taking place

Write formulas for the following compounds: potassium iodine, phosphorus pentachloride, magnesium hydroxide, aluminum sulfate, dichlorine heptoxide, and calcium nitrate trihydrate.

A 600-kg car is going around a banked curve with a radius of 110 m at a steady speed of 24.5 m/s. what is the appropriate banking angle so that the car stays on its path without the assistance of friction

What would be the mass of a 10 kg sack of sugar if it was in orbit around Saturn? A. 5 kg B. 7.5 kg C. 10 kg D. 15 kg

A molecule is Select one: a. a carrier of one or more extra neutrons. b. a combination of two or more atoms. c. less stable than its constituent atoms separated. d. electrically charged. e. none of these.

The doppler effect is the change in observed frequency due to

Which of the following is NOT a vector quantity? (A) Acceleration (B) Average velocity (C) Linear momentum (D) Potential energy (E) Force

Which of Newton's laws of motion is demonstrated by a hammer pounding a nail into a board

Heated air molecules in a hot air balloon soon carried thermal energy to the top of the balloon. this is an example of ... conduction. Convection. Radiation. Cooling.

When you are ice skating, to get started, you push your skate backwards on the ice and, as a result, begin to move forward. Which law of motion is being described in this scenario?