01 Before
after
A rubber ball of mass 0.4 kg is dropped so that it hits the floor with a speed of 3.5 m/s. If it
rebounds with a speed of 3.2 m/s what is the impulse exerted by the floor on the ball ?
(1 Point)
1.4 kg m/s
0.12 kg m/s
2.68 kg m/s
6.7 kgm/s

Nitrogen (n2) undergoes an internally reversible process from 6 bar, 247°c during which pν1.2 = constant. the initial volume is 0.1 m3 and the work for the process is 50 kj. assuming ideal gas behavior, and neglecting kinetic and potential energy effects, determine heat transfer, in kj, and the entropy change, in kj/k.