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The lowest note on a grand piano has a frequency of 27.5Hz . The entire string is 2.00m long and has a mass of 400g . The vibrating section of the string is 1.90m long. What tension is needed to tun
A dentist uses a small mirror with a radius of 44 mm to locate a cavity in a patient's tooth. If the mirror is concave and is held 17 mm from the tooth, what is the magnification of the image?
A mass-spring system oscillates with an amplitude of 3.40 cm. If the spring constant is 228 N/m and the mass is 414 g, determine the mechanical energy of the system.
A hand exerciser utilizes a coiled spring. a force of 89.0 N is required to compress the spring by 0.0191 m. Determine the force needed to compress the spring by 0.0508m.
A potter's wheel having a radius 0.55 m and a moment of inertia 14.8 kg·m2 is rotating freely at 52 rev/min. The potter can stop the wheel in 5.0 s by pressing a wet rag against the rim and e
500 J of work are done to compress the gas while, in the same process, 1200 J of heat energy are transferred from the gas to the environment. Afterward, what is the rms speed of the molecules?
Determine the final temperature of the system consisting of the ice, water, and calorimeter. Remember that the ice must first warm to 0°C, melt, and then continue warming as water.
A 310 kg wooden raft floats on a lake. When a 75 kg man stands on the raft, it sinks 3.2 cm deeper into the water. When he steps off, the raft vibrates for a while. What is the frequency of the vibr
A 68 kg woman stands on a very light, rigid board that rests on a bathroom scale at each end. What is the reading on each of the scales?
In level flight the air speed over the top of the wings is 61 m/s, while the air speed beneath the wings is 55 m/s. What is the weight of the plane?
A description of the gestalt revolt and an analysis pf the challenges it made to behaviorism (specifically) and contemporary psychology generally.
Fred strikes a steel train rail with a hammer at a frequency of 0.52 Hz, and Wilma puts her ear to the rail 2.1 km away. How long after the first strike does Wilma hear the sound? What is the time i
Assume that the net horizontal force is due to rolling friction only and take the free-fall acceleration to be g = 9.80 m/s^2. What is the coefficient of friction for the tire under low pressure?
A 58.3 kg pole vaulter running at 10.7 m/s vaults over the bar. The acceleration of gravity is 9.81 m/s2 . If the vaulter's horizontal component of velocity over the bar is 1.1m/s and air resistance
A hollow ball is rolling along a horizontal surface at 2.5 when it encounters an upward incline. If it rolls without slipping what is the maximum height it will reach?
A refrigerator (coefficient of performance = 3.00) does when it freezes 1.50 kg of water at 20.0-degrees C into ice at 0.0-degrees C?
A spherical conductor with a radius of 75.0 cm has an electric field of magnitude 8.4 x 10^5 V/m just outside its surface. What is the electric potential just outside the surface, assuming the poten
You are driving home from school steadily at 98 for 150 . It then begins to rain and you slow to 62 . You arrive home after driving 3 hours and 30 minutes. How far is your hometown from school?
Two identical point charges of +2.00 C are fixed to diagonally opposite corners of a square. A third charge is then moved to and fixed at the center of the square, such that it causes the potentia
A 145g baseball is thrown by a pitcher exerting an average force of 75N over a distance of 1.6 m. What is the speed of the baseball as it leaves the pitcher's hand?
A space traveller whose mass is 115kg leaves earth. What are his weight and masson earth and in interplanetary space where there are no nearby planetary objects?
A floppy disk for a personal computer rotates with a constant angular speed of 31.4 rad/s about an axis perpendicular to the disk at its center. (a) Find the tangential speed of a point that is 0.04
(a) How much work does she do in changing her gravitational potential energy? (b) What is her efficiency (expressed as a fraction between 0 and 1) in doing the work in part (a)?
(a) How far below the release point is the center of mass of the two stones at t = 390 ms? (Neither stone has yet reached the ground.) (b) How fast is the center of mass of the two-stone system movi