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Q. In order to clearly read a book 26 cm away, a farsighted girl needs an image to be 47.00cm from her eyes. What focal length is needed for the lens in her eyeglasses?
Q. A 82 person sits on a 3.8 chair. Each leg of the chair makes contact with the floor in a circle that is 1.4 in diam. Determine out the pressure exerted on the floor by each leg of the chair, Assume the weight is evenly distributed.
A thin, light wire is wrapped around the rim of a wheel. The wheel rotates without friction about a stationary horizontal axis that passes through the center of the wheel. The wheel is a uniform disk with radius 0.28. An object of mass 4.0 is suspend..
A person stretches a rope of length 55 m between the top of a building to the base of a tree d = 23 m away. How tall is the building.
If a person radiates about 65.00 W of power at room temperature, how long does it take for a person to radiate away the energy acquired by consuming a 230 Calorie donut.
explain What is the magnitude of the electric field next to the sheet.
A Volleyball is spiked so that it has an initial velocity of 15 m/s directed downward at an angle of 55 degrees below the horizontal. Find the horizontal component of the ball’s velocity when the opposing player fields the ball?
If the car starts at height h= 3.00 R and the radius is R_1 = 24.0 m, compute the radial acceleration of the passengers while the car is at point C, which is at the end of a horizontal diameter.
In an effort to stay awake for an all-night study session, a student makes a cup of coffee by first placing a 200 W electric immersion heater in 0.320kg of water.
An electron is then fired directly toward the center of the shell, from point P at distance r from the center of the shell (r >> R). What initial speed v0 is needed for the electron to just reach the shell before reversing direction.
Two objects attract each other gravitationally with a force of 2.3×10-10 when they are 0.65 apart. Their total mass is 5.0 . Find out their individual masses.
A 1000 kg experimental rocket sled on a level frictionless rail is loaded wiht 50kg of propellant. It exhausts the propellant in a 20-s "burn". If rocket, initially at rest, moves at 150m/s after the burn, what impulse is experienced by the rocket..
A particle of mass m is attracted to a force center with force of magnitude k/r2. Use plane ploar coordinates and find Hamilton's equations of motion.
A wheel moves forward for 2 seconds making two complete revolutions. The wheel rotates during an arc length of 8.2 meters.
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