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Mud is stopped using a wall made from 1.2 m high x 0.25 m wide rectangular concrete blocks as shown in figure below. Blocks density is 2700 kg/m3, mud density is 1800 kg/m3, and friction coefficient between ground and concrete blocks is f = 0.3 . There is concern that concrete blocks may slide or tip over the lower left edge as the mud level rises. Determine the mud height at which
A) The blocks will overcome friction, and
B) The blocks will tip over.
some bacteria are propelled by biological motors that spin hair-like flagella. a typical bacterial motor turning at a
a student plays two notes on the piano keyboard simultaneously. the white key has a frequency of 352 hz and the black
The die characteristic is Q_x = 0.0015p where p is the head pressure in psi. Determine the flight angle that maximizes the flow rate Q_x and graph it.
Find the capacity of a cylindrical tank that is 250 feet in diameter and 30 feet high? In the above problem, what is the capacity if the tank is 75% full, and what is the capacity in gallons?
a steam pipe of 120 mm outside diameter and is covered with a 20 mm thick layer of calcium silicate insulation k
at an amusement park there arae 200kg bumpers car ab and c that have riders with masses of 40 kg 60kg and 35 kg
for a one order narrowing of arterial vessel in cross sectional area ainaout 10 what is the outlet pressure if the
a heavily insulated piston-cylinder device contains a gas which is initially at 5 bars and 187 degc and occupies 0.1
a tube with elastic modulus of 75 gpa is used to support a compressive load. it is required that this tube must not
a 60 g bullet moving with a speed of 500 ms strikes a 5 kg block moving in the same direction with a speed of 30 ms. if
explain the tapping operation and the steps to follow peripheral milling is performed on the top surface of a
as a result of a chemical spill benzene is evaporating at the rate of 1 gram per minute into a room that is 6m x 6m x 3
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