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The speed of an object & the direction in which it moves constitute a vector quantity known as the velocity. An ostrich is running at a speed of 15.6 m/s in a direction of 42 degrees north of west. What is the magnitude of the ostrich's velocity component that is directed in the following directions?:
a) due north
b) due west
If a heat engine is operating at a coefficient of performance of 2.50 and 3.00 J of heat is absorbed from the surroundings, determine the magnitude of heat expelled.
A person holds a 1.42-N baseball in his hand, a distance of 34.0cm from the elbow joint, Calculate the net torque acting on the forearm and hand
What are the two main mechanisms that the planet Earth uses to balance water that goes up with the water that comes down over Earth.
A 65.0 kg person jumps from rest off a 3.19 m-high tower straight down into the water. Determine the magnitude of the average force that the water exerts on the diver
What should the charge (sign and magnitude) of a particle of mass 1.42g be for it to remain stationary when placed in a downward-directed electric field of magnitude 670N.
Only two forces act on an object (mass=4.61 kg), as in the drawing. Find the direction (relative to the x axis) of the acceleration of the object
a. what rms current is drawn by a 3400-w electric room heater when running on 120 v rms?b. what is the power
One generator uses a magnetic field of 0.10 T and has a coil area per turn of 0.045 m2. A second generator has a coil area per turn of 0.020 m2. The generator coils have the same number of turns and rotate at the same angular speed.
The wingspan (tip-to-tip) of a Boeing 747 jetliner is 59 m. The plane is flying horizontally at a speed of 220 m/s. Find the emf induced between the wing tips
Consider three capacitors having capacitances of 5.51, Find their equivalent capacitance if they are connected for both: in parallel and in series
A solenoid 1.30 m long and 2.70 cm in diameter carries a current of 12.0 A. The magnetic field inside the solenoid is 15.0 mT. Find the length of the wire forming the solenoid
When the power is turned off on a turntable spinning at 78 rpm, you find that it takes 10.5 revolutions for it to stop while slowing at a constant rate. How much time passes until it stops
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