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Chemistry 9 Online
OpenStudy (anonymous):

A car traveling at a velocity of 25 mph crashed into a brick wall. What is the velocity of the driver the moment after impact if the driver was not wearing his seat belt? A. 60 mph B. 40 mph C. 48 mph D. 25 mph

OpenStudy (aaronq):

the same, because inertia. The person kept moving at the same velocity

OpenStudy (anonymous):

that was what i was thinking too

OpenStudy (anonymous):

Newton's cradle is a science toy that is often used to demonstrate the law of conservation of energy.When one ball is raised, it acquires potential energy which is then transformed into kinetic energy once the ball is released. In theory, the total energy should be conserved such that the balls continue in perpetual motion. However, over time, the balls stop moving. Why? A.It is not possible to convert potential energy into kinetic energy. B.Some of the energy is converted into heat. C.Some of the energy is destroyed. D.It is not possible to convert kinetic energy into potential energy.

OpenStudy (aaronq):

B.Some of the energy is converted into heat. friction with gas molecules in the air

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