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A particular guitar string is supposed to vibrate at 191 Hz, but it is measured to actually vibrate at 210 Hz. By what percent should the tension in the string be changed to get the frequency to th
f each electron contributes a magnetic moment of 9.27 10-24 A · m2 (1 Bohr magneton), how many electrons per atom contribute to the saturated field of iron?
In one pipe the air temperature is increased to 330 K. If the two pipes are sounded together, what beat frequency results?
A 94 kg man lying on a surface of negligible friction shoves a 74 g stone away from himself, giving it a speed of 4.0 m/s. What speed does the man acquire as a result?
A person with perfect pitch sits on a bus bench listening to the 441-Hz horn of an approaching car. If the person detects a frequency of 479 Hz, how fast is the car moving?
Determine the ratio of the relativistic kinetic energy to the nonrelativistic kinetic energy (1/2mv2) when a particle has a speed of (a) 1.54 x 10-3c. and (b) 0.841c.
A woman is 1.7 m tall and has a mass of 68 kg. She moves past an observer with the direction of the motion parallel to her height. The observer measures her relativistic momentum to have a magnitud
The resistance of each of the three identical bulbs, by R. Determine the power in bulb1 and in bulb2. Denote the pair of the powers as: [P1, P2]?
a cannonball shot with an initial velocity of 141 m/s at an angle of 45 follows a parabolic path and hits a balloon at the top of its trajectory. neglecting air resistance, what is the speed of the
The electrical force on a pair of charges is 60N. IF those same charges are moved to double the distance away from each other, what is the new electrical force on the pair of charges?
A 7.8 g bullet is accelerated in a rifle barrel 115 cm long to a speed of 590 m/s. Use the work-energy theorem to find the average force exerted on the bullet while it is being accelerated.
If a car of mass 1000 kg is moving along a highway at 92 km/h, what is the car's kinetic energy as determined by someone standing alongside the highway?
The locations marked by "x" and labeled by a letter are in the interior of the wire. How many electrons per second enter the positive end of the battery 2? Answer in units of electrons/s.
The wire is wound onto a cardboard tube in a single layer, with adjacent turns touching each other. What power must be delivered to the solenoid if it is to produce a field of 7.80 mT at its center?
A shotputter accelerates a 7.3kg shot from rest to 14m/s. If this motion takes 1.5s, what average power was developed?
A 3.00kg mass resting on a level table top is pulled alond by a horizontal force of 16.0N and accelerates at 4.00 meters per second per second. what is the force of friction between the block and t
An ancient club is found that contains 120 g of pure carbon and has an activity of 7 decays per second. Determine its age assuming that in living trees the ratio of 14C/12C atoms is about 1.1x10-12.
In New England, the horizontal component of the Earth's magnetic field has a magnitude of 1.4 x 10-5 T. An electron is shot vertically straight up from the ground with a speed of 3.9 x 106 m/s. Wha
Planet Z is 9,000 km in diameter. The acceleration due to gravity on Planet Z is 8.5 m/s2. What is the mass of Planet Z?
sound waves to people sitting across the newsroom, 1.2 m from the newscaster. Take the speed of sound in air to be 345 m/s. What is the difference in time that the message is received?
Consider a refracting telescope. If it has an objective lens with fobj = 1.8 m and an eyepiece with feyepiece = 2.9 cm, what is the angular magnification of the telescope?
An air puck of mass 0.273 kg is tied to a string and allowed to revolve in a circle of radius 0.85 m on a horizontal, frictionless table. The other end of the string passes through a hole in the cen
High-speed stroboscopic photographs show that the head of a 270 g golf club is traveling at 55 m/s just before it strikes a 46 g golf ball at rest on a tee. After the collision, the club head travel
What is the variation of pressure in the sound wave if the speed of sound is 343 m/s and the density of air is 1.2 kg/m3?
We observe two charges separated by a distance of 1.00 meters. If the distance between the two charges is changed to be half what it was, by what factor would the electric force of between them be c