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An engineer is to design a channel lined with planed wood to carry water at a flowrate of 2 m3 /s on a slope of 10 m/ 800 m. The channel cross section can be either a 90° triangle or a rectangle with a cross section twice as wide as its depth. Which would require less wood and by what percent?
A skier starts from rest at the top of a 42m hill, skis down a 43 degree incline in to a valley, and continues up a 24 m high hill. (Neglect friction and the effect of the ski poles) What is the speed of the skier at the top of the second hill?
WebAssign will do simple calculations for you, using +, -, *, /, parentheses, and E-notation. For instance, if a question asks for half the sum of 246 and 388, you can enter "(246+388)/2".
A bimetalic strip consists of a thinstip of brass [Alphabrass=19X106(Co)-1] riveted to a thin strip of steel [Alphasteel=12X106(Co)-1]. What happens when it is heated above room temperature?
A heavy piece of hanging sculpture is suspended by a90-cm-long, 5.0 g steel wire. When the wind blows hard, the wire hums at its fundamental frequency of 80Hz. What is the mass of the sculpture?
two 1 microcoulomb point charges are located on the x-axis at x 2m and at x -2m. find the magnitude of the electric
A parallel-plate capacitor has plates separated by 0.72 mm. what is the potential difference between the plates
A thin 7.3-m metal rod sustanins a longitudinal standing wave with vibration antinodes at each end of the rod. What is the frequency of the rod's vibration
An ac generator with a frequency of 1.54kHz and an rms voltage of 22.2V is connected in series with a 1.90k, What is the power factor for this circuit
A lead ball with a velocity of 3.50m/s is to be dropped from a bridge that is 20 meters above the water, into a model boat moving with a constant velocity of 1.90m/s. How long must we wait to drop the lead ball so that it hits the model boat?
A small single r=1mm is placed coaxially at the center of a long solenoid n=500 tunrs per cm. the solenoid carries a current i=7sin(wt) a) what is the magnetic field through the small coil? b) What is the flux though the small coil? c) What is the ra..
The traces of the rain on the side windows of the car make an angle of 60.0 with the vertical. Find out the velocity of the rain with respect to the following reference frames.
You drop a stone into a deep well and hear it hit the bottom 2.60 s later. This is the time it takes for the stone to fall to the bottom of the well.
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