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A farsighted person uses glasses with a refractive power of 3.5 diopters. The glasses are worn 2.7 from his eyes. What is this person's near point when not wearing glasses?
A spherical mirror is polished on both sides. When the convex side is used as a mirror, the magnification is +1/4. What is the magnification when the concave side is used as the mirror, the object remaining the same distance from the mirror.
A harpsichord string of length 1.50 m and linear mass density 25.0 mg/m vibrates at a (fundamental) frequency of 450.0 Hz. What is the speed of the transverse string waves
An open organ pipe 0.750 {\rm m} long has its first overtone at a frequency of 441 {\rm Hz}. What is the temperature of the air in the pipe
A 67.3 ice skater moving to the right with the velocity of 2.52 throws a .151 snowball to the right with a velocity of 33.7 relative to the ground. What is velocity of the ice skater after throwing the snowball.
A driver measures her "cold" tire gauge pressure to be 2.05 105 Pa. The measurement is made before driving, Find the final temperature in Celsius of the air in the tires
A 180 g top spinning at 14 rev/s makes an angle of 30° to the vertical and precesses at a rate of 1 rev per 8.0 s. what is the moment of inertia of the top
A snowmobile climbs a hill at velocity v-up. The slope of the hill is a 2 ft rise for every 70 ft of distance. The resistive force of the snow is equal to 4.12 percent of the weight of the snowmobile. How fast will the snowmobile move downhill, assum..
A 2.4 kg iron ball is dropped from a height of 14 m onto a concrete roadway, What is the ball's increase in temperature
A box has a partition with 10% of its volume one side. The larger section of the box contains 500 Ar atoms and the smaller 100He atoms. A small hole is put into the partition. At equilibrium, what is the mean number of atoms of each type?
A daredevil is shot out of a cannon at 43 degrees to the horizontal with an initial seed of 25m/s. A net is positioned at a horizontal distance of of 50m from the cannon from which it is shot. At what height above cannon should the net be placed i..
A child pulls an imaginary friend in a wagon at constant speed for 10m with a force of 16N. how much work does the child do
What is the speed of the runner. What is the total translational kinetic energy of gas molecules.
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