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The focal length of a simple magnifier is 7.00 cm. Suppose the magnifier to be a thin lens placed very close to the eye.
1. How far in front of the magnifier must an object be placed if the image is formed at the observer's near point, 25.0 cm in front of her eye?
2. If the object is 2.70 mm high, what is the height of its image formed with the magnifier?
Two 0.70m -long pendulums hang side by side. The masses of the pendulum bobs are 55g and 65g. To what height does the heavier bob rebound
A clean copper surface is exposed to light of wavelength 275 nm. What is the maximum speed of the photoelectrons emitted from this surface? Use the table below copper=4.7eV.
The wheels, axle, and handles of a wheelbarrow weigh W = 66 N. The load chamber and its contents weigh WL = 621 N. Find the magnitude of the man's force for both designs
A mass attached to a spring stretches it 2.5 cm from equilibrium. What is the angular frequency of the oscillation
At a construction site, a 63.0 bucket of concrete hangs from a light (but strong) cable that passes over a light friction-free pulley and is connected to an 83.0 box on the horizontal roof. The cable pulls horizontally on the box, and a 45.0 bag of g..
A solenoid of length 15 cm and radius 0.8 cm with 350 turns is in aexternal magnetic field of 400 T that makes an angle of50owith the axis of the solenoid. Find the magnetic fluxthrough the solenoid. Answer in units of mWb. My assignment gave methe e..
At the equator, near the surface of Earth, the magnetic field is approximately 42.0 µT northward and the electric field is about110 N/C downward in fair weather. Calculate the gravitational, electric, and magnetic forces
ou place it in water and it displaces a volume of 20 cubic centimeters of water. What is the hardness of this mineral? describe your answer.
Two parallel plates having charges of equal magnitude but oppositesign are separated by 12cm. Each plate has a charge density of 36nC/m2. A proton is released from rest at the positive plate. The potential difference across the plates
after flying for 15 min in a wind blowing 42 kmh at an angle of 24deg south of east an airplane pilot is over a town
A bead slides without friction around a loop- the-loop. The bead is released from a height of 24.7 m from the bottom of the loop-the- loop which has a radius 9 m.
q1. youre driving down the highway late one night at 20 rm ms when a deer steps onto the road 35rm m in front of you.
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