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A magnifier has a magnification of 4X for someone by a normal near-point distance of 25 cm. What is the magnification of this lens when utilized by a person with a near-point distance of 15 cm?
a rectangular loop of wire of 6.6 cm by 8.0 cm in a uniform magnetic field of magnitude 1.6t. the loop is rotated from
the wire in the drawing carries a current of 9.3 a. suppose that a second long straight wire is placed right next to
The volume of 9 mol of a monatomic gas is increased from 3 L to 6 L at constant pressure. The initial temperature of the gas is 31?C. How much heat must be supplied to the gas
The closest star to our solar system is Alpha Centauri, which is4.30 light years away. A spaceship with a constant speed of 0.800c relative to the Earthtravels toward the star. How much time would elapse on a clock on board the spaceship?
Two coherent sources of radio waves, A and B, are 5.00 meters apart. All sources emits waves with wavelength 6.00 meters. Consider points along the line connecting the two sources. At what distances from source A is there destructive interference amo..
A 140 kg astronaut (including space suit) acquires a speed of2.50 m/s by pushing off with his legs from an 1800 kg space capsule. What is the change in speed of the space capsule
The radius of a typical nucleus is about 5.0 x 10^-15 m. Assuming this to be the uncertainty in the position of a proton in the nucleus, approximation the uncertainty in the proton's energy (in eV).
A 120 g insulated aluminum cup at 17 C is filled with 140 g of water at 40 C. After a few minutes, equilibrium is reached. A)Determine the final temperature. B)Estimate the total change in entropy.
You are shining ultraviolet light on a gas of an unknown element. You know that an electron starts in a ground state with an energy of -16.30 eV. What is the energy of the first photon emitted
question the hobby-eberly telescope in fort davis texas is the largest optical telescope in north america. the primary
Suppose the coefficient of static friction between the road and the tiers on a car is 0.60 and the car has no negative lift. What speedwill put the car on the verge of sliding as it round a level curveof 30.5 m radius?
A uniform disk has a mass of 4.6 kg and a radius of 0.2 m. The disk is mounted on frictionless bearings and is used as a turntable. What is the final angular momentum of the system
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