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1. Water at 20-C flows through a 12-mm-diameter pipe on a downward slope so that Re ¼ 2000. What angle would result in a zero pressure drop?
2. Water at 40-C flows in a vertical 8-mm-diameter pipe at 2 L/min. Assuming a laminar flow, calculate the pressure drop over a length of 20 m if the flow is (a) upwards and (b) downwards.
A river flows due south with a speed of 1.6m/s. A man steers a motorboat across the river; his velocity relative to the water is 4.6m/s due east. What is the direction of his velocity relative to the earth
The wall of a house consists of three layers: a wooden outer wall with an R factor of 1.0, a 3in layer of fiberglass insulation with an R factor of 11, what is the rate of heat loss throug an 8ft by 15ft section of this wall
A bumper car with mass m1 = 116 kg is moving to the right with a velocity of v1 = 5 m/s. A second bumper car with mass m2 = 96 kg is moving to the left with a velocity of v2 = -3.8 m/s. The two cars have an elastic collision. Suppose the surface is f..
consider this nasa decides to build a house on the moon and to keep time they send up the grandfather clock from the
A rope of length 8 meters and mass 0.04 kg is fixed at both ends. The tension of the rope is 49 N. What are the positions of the nodes and the anti-nodes
A disk with moment of Inerti I= 10 kg*m^2 is inititally at rest. A torque of 100Nm is applied tot he disk. What is the angular acceleration of the disk
tarzan who weighs 820 n swings from a cliff at the end of a 20.0 m vine that hangs from a high tree limb and initially
What is the smallest diameter spot the eye can produce on the retina if the pupil diameter is 4.50mm ? Assume light with a wavelength of = 510nm
An archer standing on a 15° slope shoots an arrow 20° above the horizontal, as shown in the figure. How far down the slope does the arrow hit
A 1300kg sports car accelerates from 0m/s to 26m/s in 13s. What is the average power of the engine?
q1. speedboat a negotiates a curve whose radius is 118 m. speedboat b negotiates a curve whose radius is 270 m. each
A loudspeaker at a rock concert generates 10-2 W/m2 at 24.0 m at a frequency of 1.0 kHz. What is the total acoustic power output of the speaker
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