Tarzan running at 8 m/s grabs onto a vertically hanging vine and swings up. A) Determine how high he will swing up. Air resistance is negligible. B) If the vine is 17 m long, will Tarzan make it across the 10 m wide ravine? C) What is Ф?

Cathy is pedaling down a steep hill on her bicycle and wants to be able to coast up the next hill, which is 25 meters high, without pedaling. cathy and her bicycle have a mass of 75 kg. assuming her bicycle is 100% efficient, what would her speed have to be?

If you wanted to move an electron from the positive to the negative terminal of the battery, how much work w would you need to do on the electron? enter your answer numerically in joules.

Would it be correct to say the doppler effect is the apparent change in the speed of a wave due to the motion of the source? be sure to fully explain your position using at least 3 complete content related sentences.