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1. Water flows at a depth of 40 cm in a 100-cm-diameter storm sewer. Calculate the flow rate and the mass flux if the average velocity is 3 m=s.
2. Air at 25-C and 240 kPa flows in a 10-cm-diameter pipe at 40 m=s. What are the flow rate and the mass flux in the pipe? (Recall that pressures are always gauge pressures unless stated otherwise.)
You are lowering two boxes, one on top of the other, down the ramp by pulling on a rope parallel to the surface of the ramp. What is the magnitude of the friction force on the upper box
A 340kg wooden raft floats on a lake. When a 65kg man stands on the raft, it sinks 3.0cm deeper into the water. When he steps off, What is the total energy of vibration
an object is placed 12.0 cm in front of the cornea. the cornea is thin ans has approximately parallel sides so that the
A ray of light consisting of two colors (red and blue) is incident normally on the face of a small equilateral prism. What is the distance between the two colors on the screen
During basketball parctice Shane made a jump shot, releasing a0.60-kg basketball from his hands at a height of 2.0-m above thefloor with a speed of 7.6 m/s. How much energy was dissipated by air drag
Two identical small conducting spheres are separated by 0.60m. The spheres carry dissimilar amounts of charge and each sphere experiences an attractive electric force of 10.8N. The total charge on the two spheres is -24uC. The two spheres are now con..
Five thousand joules of heat is put into a Carnot engine whose hot and cold reservoirs have temperatures of 600 and 200 K, respectively. How much heat is convertedd into work?
The staples inside a stapler are kept in place by a springwith a relaxed length of 0.115 m. If the spring constant is 51.0N/m, how much elastic potential energy is stored in the spring
A geodesic dome constructed with an aluminum framework is a nearlyperfect hemisphere; its diameter measures 56.0 {\rm m} on a winter day at a temperature of -10{\rm ^\circ C}. How much more interior space does the dome have
Using a grating with a spacing of 0.00046 cm, a line (which looks like red light) appears 27 cm from the central line on a screen. The screen is 1.9 m from the grating. What is the wavelength of the light?
A spring causes a textbook attached to its end to oscillate back and forth. The end of the springs position at time t is defined by the function y = 4.50cos(2.50π t+ 0.500π) meters. The textbook has a weight of 27.5 N.
A 24 inch string is wrapped around the 1/8 inch radius axis of a yo yo. Starting from rest, the yo yo descends with the constant angular acceleration of 4 rad/seconds squared. How long will it take the string to totally unwind.
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