Tim, with mass 78.9 kg, climbs a gymnasium rope a distance of 4.3 m. The acceleration of gravity is 9.8 m/s 2 . How much potential energy does Tim gain? 1. 2826.12 J 2. 3823.57 J 3. 3324.85 J 4. 2992.36 J 5. 3657.33 J 6. 2493.63 J 7. 3158.60 J 8. 3989.82 J 9. 2659.88 J 10. 3491.09 J

The discovery that the universe appears to be expanding led to a widely accepted theory called a.) the big bang theory b.) the doppler effect c.) hubble’s law d.) solar nebular theory e.) the seyfert theory

From 0 to 5 seconds john pushed a box 5 meters. from 5 to 10 seconds, paul pushed the same box another 5 meters. who did more work? a. john b. paul c. john and paul did the same amount of work.

Global warming will produce rising sea levels partly due to melting ice caps but also due to the expansion of water as average ocean temperatures rise. to get some idea of the size of this effect, calculate the change in length of a column of water 1.00 km high for a temperature increase of 1.00ºc. note that this calculation is only approximate because ocean warming is not uniform with depth. (answer in ×10^{-3} −3 m)