Which of the following represents a system that is completely open?

A. a capped soda bottle

B. a pot of boiling water

C. a presser cooker

D. a pressurized canister of helium gas

How do Newton's law of motion explain why it is important to keep the ice smooth on a hockey rink

What do you mean by physical quantity

What is power? the magnitude of a force needed to move an object how much work can be done in a given time the distance over time that an object moves the energy needed to create work

Anticeptics used in cuts and wounds of human flesh have low surface tension?

During a compression test, a cylinder has 40 percent of the specified compression reading. When the technician performs a wet test, the compression reading on this cylinder has 75 percent of the specified reading.

Which actions are evidence that a chemical reaction has occurred? Check all that apply. A: a change in color B: the formation of a precipitate C: a clear liquid becoming cloudy D: a change in shape E: the formation of bubbles F: the formation of

Which sphere forms Earth's outermost layer? Atmosphere Biosphere Cryosphere Hydrosphere

an 100kg object traveling at 50m/s collides (perfectly inelastic) with a 50kg object initially at rest. what is the sum of the momentum of both objects prior to the collision?

A train moves at constant velocity of 50km/h. how far will it move in 0.5h?

Which process best describes part of a scientific investigation? O designing a solution O evaluating the conclusion O evaluating the solution O identifying the conclusion