How to find gravitational potential energy?

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Which of the following shows that an energy transformation has taken place? A. matter is destroyed B. heat is produced C. matter is created D. there is no change

A balloon has a volume of 3.0 l at 25°c. what is the approximate volume of the balloon at 50°c?

You ask people to rate there depression on a scale of 1 to 10 their respnses are a (n) ___in your study. a. variable b. discrete v c. observation d. hidden v

A thread holds a 1.5-kg and a 4.50-kg cart together. After the thread is burned, a compressed spring pushes the carts apart, giving the 1.5 kg cart a speed of 26 cm/s to the left. What is the velocity of the 4.5-kg cart? a. 10 cm/s b. 4.56 cm/s c. 8.

How do you determine if a charged comb is positively charged or negatively charged. Suppose it is positively charged, it will attract negative charge on the electroscope and the positive charges on the leaves will repel.

What is the biggest problem with invasive species in their new location? A They are always stronger than native species. B They evolve more quickly than native species. C They have higher reproductive rates than native species.

A train has a length of 102 m and starts from rest with a constant acceleration at time t = 0 s. At this instant, a car just reaches the end of the train. The car is moving with a constant velocity. At a time t = 18.

To set a speed record in a measured (straight-line) distance d, a race car must be driven first in one direction (in time 11) and then in the opposite direction (in tim e t). (a) To eliminate the effects of the wind and obtain the car's speed v.

A spring tide can occur at what day and month?