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Suppose you construct a barometer filled with an oil (d=1.25g/cm3) in the vertical tube. If the atmosphere has a pressure of .95 atm, what is the approximate height of the oil in the tube?
As a new electrical engineer for the local power company, you are assigned the project of designing a generator of sinusoidal ac voltage with a maximum voltage of 120 {\rm V}. What is the minimum rotation rate of the coil so it will produce the req..
An 85-kg jogger is heading due east at a speed of 1.9 m/s. A 55-kg jogger is heading 24° north of east at a speed of 3.8 m/s. Find the magnitude and direction of the sum of momenta of the two joggers.
An engineer has designed a machine to produce electricity by using the difference in the temperature of ocean water at different depths. what is the maximum efficiency of this machine
A glass sheet is covered by a very thin opaque coating. In the middle of this sheet there is a thin scratch 1.25×10-3mm thick. The sheet is totally immersed beneath the surface of a liquid.
A scuba diver is 40 m below the surface of a lake, where thetemperature is 5 degrees C. He releases an air bubble with avolume of 15 cm^3. What is the volume of the bubbleright
The Sun emits electromagnetic waves (including light) equally in all directions. At what rate does the Sun emit electromagnetic waves
The intensity of the sunlight that reaches Earth's upper atmosphere is approximately 1335 W/m2. What is the average energy density
One type of slingshot can be made from a length of rope and a leather pocket for holding the stone. The stone can be thrown by whirling it rapidly in a horizontal circle and releasing it at the right moment. Such a slingshot is used to throw a sto..
A block is resting on a ramp with coefficient of friction between the blockand the ramp being .350, What is the max angle that the block can make without slipping
question1a 2 kg ball of clay travelling west at 10 ms collides with 1 kg ball of clay travelling north at 5 ms. what is
A car is travelling at a constant speed of 31.1 m/s on a highway. At the instant this car passes an entrance ramp, a second car enters the highway from the ramp. The second car starts from rest and has a constant acceleration. What acceleration mu..
at a steady laminar flow through a tube of radius of 1cm the volume flow rate is 30 liters of water during 1 minute.
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