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Shareen finds that when she drives her motor boat upstream she can travel with a speed of only 8 m/s, while she moves with a speed of 12 m/s when she heads downstream. Find the current of the river on which Shareen is traveling?
A hollow, thin-walled cylinder and a solid sphere start from rest and roll without slipping down an inclined plane of length 3.0 m. find the angle between the inclined plane and the horizontal
The drawing shows a person looking at a building on top of which an antenna is mounted. The horizontal distance between the person's eyes and the building is 96.3 m. How tall is the antenna
An engine absorbs 1.69 kJ from a hot reservoir at 277 °C and expels 1.24 kJ to a cold reservoir at 27 °C in each cycle. What is the power output of the engine if each cycle lasts 0.298 s
The magnetic flux passing through a single loop in a transformer changes at a rate of 0.7 Wb/s. The primary coil has 182 loops and the secondary coilhas 995 loops. Find the voltage in each coil.
A car moves along the x-axis in the positive direction. Find the sign (+,-) of the velocity and acceleration of the car for each situation: 1. The car moves AWAY from the origin and gets FASTER 2.
Two spaceships approach Mars from the same direction. One has a speed of 0.2c, What is the speed of one spaceship relative to the other
The frequency of sound wave from an ambulance is 2,400 Hz. The velocity of sound is 345.0 m/s. find the frequency of the siren heard by the observer
Suppose a block with mass 2.80 kg is resting on a ramp. If the coefficient of static friction between the block and the ramp is 0.440, Find the maximum static friction force that acts on the block
How fast is the shadow of the plane moving along the ground? (That is, what is the magnitude of the horizontal component of the plane's velocity?)
Human blood contains plasma, platelets, and blood cells. To separate the plasma from other components, centrifugation is used. Effective centrifugation requires subjecting blood to an acceleration of 2000g or more.
What would be the required internal diameter of a fluid conductor, assuming no friction losses, if the conductor willbe required to handle a fluid flow of 110 gal/min. At a fluidvelocity of 14.8 ft/sec.
A 1.5 m cylinder of radius 1.1 cm is made of a complicated mixture materials. Its resistivity depends on the distance x from the left and obeys the formula p(x)=a+bx^2, What is the resistance of the rod
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