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A person weighing 119 pounds can run up 500 steps (each step is 0.20 m high) in 10 minutes and 20 seconds. How much power did the person expend running up the steps? Use metric units only.
a circular loop of wire 14 cm in diameter is placed with its normal at an angle ? = 37° with the direction of a uniform magnetic field of magnitude B = 0.51 T, What is the emf induced in the loop
A plane is flying southwest at 155 mi/h and encounters the wind from the west at 45mi/h? what is the planes new velocity with respect to the ground in standard position.
Illustrate energy bar graphs to solve the problem . What is amplitude of the oscillations.
A 2500-kg sport utility vehicle travelling at 92 km/h can be stopped in 0.25 s if it hits a concrete wall. Assume a 60 kg person was in the car that hit this wall. The velocity of the person equals that of the car both before and after the crash, and..
A transformer connected to a 100 V (rms) ac line is to supply 8.0 V (rms) to a portable electronic device. What rms current must the secondary supply
A ranger in a national park is driving at 28.0 mi/h when a deer jumps into the road 225 ft ahead of the vehicle. After a reaction time t, the ranger applies the brakes to produce an acceleration of a = -9.00 ft/s2. What is the most reaction time a..
A photoflash unit makes a very bright light for a very short time. Discuss differences in the exposure of the film with and without a flash unit. Consider the f-stop and shutter speed in your deliberation.
Jack and Jill ran up the hill at 3.3 m/s . The horizontal component of Jill's velocity vector was 2.0 m/s. What was the angle of the hill? Illustrate what was the vertical component of Jill's velocity?
The magnitude of a uniform electric field between the two plates is about 2 × 105 N/C. If the distance between these plates is 0.1 cm
One mole of hydrogen gas at 22 C is compressed through an isobatic process to half its original volume
What is the new momentum of the puck. What is the length of pipe.
A person looks horizontally at the edge of a swimming pool. If its length is 5.00m, and the pool is filled to the surface, to what depth (in m) could observer see? For water is 1.33).
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