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A student is reading a lecture written on a blackboard. The lenses in her eyes have a refractive power of 56.11 diopters, and the lens-to-retina distance is 1.791 cm. (a) How far is the blackboard from her eyes? (b) If the writing on the blackboard is 6.44 cm high, what is the height of the image on her retina?
A bolt on an engine is to be tightened with a maximum torque of 75 Nm. If a wrench has a length of 0.30 m, what is the maximum force perpendicular to the length
Tarzan, in one tree, sights Jane in another tree. He grabs the end of a vine with length 21m that makes an angle of 50? with the vertical, Calculate Tarzan's speed just before he reaches Jane
suppose a force F1=25 N and F2=75 N acts on a particle of mass 1.0 kg, Determine the magnitude and direction of the resulting acceleration
A wire 3.00 m long and 0.450 mm2 in cross-sectional area has a resistance of 41 at 20°C. what is the temperature coefficient of resistivity
A nonconducting solid sphere of radius 8.40 cm has a uniform volume charge density. The magnitude of the electric field at 16.8 cm from the sphere's center is 2.21 103 N/C.
a 250-kg motorcycle goes around an unbanked turn of radius 13.7m at a steady 96.5 km/h. What is the magnitude of the net force on the motorcycle?
Find the radius of the largest water drop
calculate and compare the energy released by (a) fusion of 1 kg of hydrogen deep within the sun and (b) the fisision of 1 kg U235 in a fission reactor
Two tug boats are towing a ship. Each exerts a horizontal force of 5 tons and the angle between their towropes is 90 degrees. What net force is exerted on the ship?
What is the electric potential energy of three equal positive charges of 1.33 µC while they are arranged to form a triangle 2.10 x 10-3 m on a side.
The wheel of a car has a radius of 0.365 m. The engine of the car applies a torque of 284 N · m to this wheel, which does not slip against the road surface. Since the wheel does not slip, the road should be applying a force of static friction to t..
Two musicians are playing two pieces of the same instrument so that the sound produced by the first musician has a frequency of 1 kHz, What is this frequency called
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