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a 71kg diver drops from a board 10m above the water surface. use conservation of mechanical energy to find his speed 5m above the water surface.
- A 18Ω resistor and a 30Ω resistor are first connected in parallel and then in series with a voltage source of 12V. Find the effective resistance and current in each of the connections of the circuit.
- A 10Ω resistor is connected in parallel to 32Ω resistor and a voltage source of 24V. Find the effective resistance and total current provided in the circuit. Determine the current in each of the resistors.
- A 150Ω resistor is connected in series to a1kΩ resistor and to a battery of 127V. Find the effective resistance and current in the circuit.
Two forces whose resultant is 10N are perpendicular to each other. If one of them makes an angle of 60 with the resultant, calculate the magnitude
a from a balloon reaches the ground in 30 sec. Determine the height of the balloon if it at rest in the air
in a billiard table a ball of mass weighing 250 g rolls at a velocity of 2?5 m/s and rebounds back at 2.5 m/s what is it change in momentum
A 25 kg object moving with a velocity of 3.0 m/s to the right collides with a 15 kg object moving to the left at 6.0 m/s. Find the velocity of the 25 kg object after the collision, if the 15 kg object continues to move to the left but only at 0.30 m/s
A 0.1 kg ball moving at a constant velocity of 2 m/s strikes a 0.4 kg ball that is at rest. After the collision, the first ball rebounds straight back at 1.2 m/s. Calculate the final velocity of the second ball
Assume 5 lb/sec of fluid enter a steady state, steady flow system with p1 = 100 psia, 1 =
0.2 lb/ft3
, v1 = 100 fps, u1 = 800 Btu/lb and leave with p2 = 20 psia, 2 = 0.05 lb/ft3
, v2 = 500
fps, u2 = 780 Btu/lb. During the passage through the open system, 10 Btu/lb of heat is
rejected. Find the work in hp.
