While skiing in jackson, wyoming, your friend ben (of mass 69.8 kg) started his descent down the bunny run, 16.8 m above the bottom of the run. if he started at rest and converted all of his gravitational potential energy into kinetic energy, what is ben’s kinetic energy at the bottom of the bunny run? use g = 9.8 m/s 2 answer in units of j.

At what time will the interfering waves have an amplitudeof zero?

You have two photos of a person walking. one shows the person at the corner of third and main streets, the other shows the person at the corner of tenth and main streets. there are lampposts at every corner in this town, and the first picture shows it to be 10: 32: 00 exactly. the second picture shows it to be 10: 49: 30. you know three facts: (1) all of the clocks are synchronized; (2) there are exactly 12 equal-sized blocks per kilometer in this town; and (3) the streets that cross main in this area are numbered consecutively, with no interruptions. what is the person’s average speed in kilometers per hour?

When a lead acid car battery is recharged by the alternator, it acts essentially as an electrolytic cell in which solid lead(ii) sulfate is reduced to lead at the cathode and oxidized to solid lead(ii) oxide at the anode. suppose a current of is fed into a car battery for seconds. calculate the mass of lead deposited on the cathode of the battery.