Calculate the speed of a periodic wave that has a wavelength of 2.0 m and a frequency
of 3.0 Hz.
O 12 m/s
O 5 m/s
O 2 m/s
0 6 m/s

A100 kg running back runs at 5m/s into a stationary linebacker. it takes 0.5 for the running back to be completely stopped

Arigid tank is divided into two equal parts by a partition. one part of the tank contains 3 kg of compressed liquid water at 400 kpa and 60°c while the other part is evacuated. the partition is now removed, and the water expands to fill the entire tank. determine the entropy change of water during this process, if the final pressure in the tank is 40 kpa. use steam tables.

Ain is , is 's of ? 0.62 0.79 1.27 1.50