Why does the total amount of energy before and after

any energy transformations remain the same?

10. A 5.0 g pellet is placed in the barrel of a toy gun and is propelled by a spring of force constant 50. N/m. The spring is compressed 20. cm and then released. Calculate the maximum velocity of the pellet when shot horizontally.

How society has been benefited by the knowledge of physics

Scientists study the life history of stars by examining what trait of stars? A. size B. energy output C. color D. all of these

Why do you see colors when you look at reflected light from a cd

Which statement best describes the formation of diamonds? A. Diamonds form in kimberlites under very low pressure. B. Diamonds form in kimberlites under very high pressure. C. Diamonds form in talc under very high pressure. D.

What is the acceleration of a body revolving in a circle at uniform speed? A. The acceleration is zero. B. The acceleration is directed tangentially. C. The acceleration is directed toward the center. D.

What volume is occupied by 2.35 moles of he at 25 degree c and a pressure of 0.980 atm?

3. A stone is thrown upward at an angle. What happens to the horizontal component of its velocity as it rises

An arc welder provides 250A of current when operating with a voltage of 40V. What is the power required by this welder? Explain your answer.

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