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By what factor would the tension in a violin string have to change to tune it from Baroque pitch of 415 Hz to the modern pitch of 440 Hz? (Assume that the material of the string and the weight per length of the string remain unchanged.) would the tension have to increase or decrease?
A transformer has 5.00 E4 turns in its primary coil and 7.00 E3 turns in its secondary coil. find the rms current in the primary coil
a simple harmonic oscillator begins its motion from maximum positive displacement when a certain clock reads t0.00s.the
in the measurement of length of a cylinder the main scale reading of a vernier caliper is 1.5 cm the vernier reading is
Astronauts discover a planet orbiting another star. The mass of the star is 8.10 x 10^30 kg, what is the force exerted by the star on the planet
Computes the price per kwh for a 12-volt automobile battery with a 50 amp-hour capacity that sells for $40. If its weight is 45-lb, what is the energy density in watt-hours per lb.
A 250 kg weather rocket is loaded with 100kg of fuel and fired straight up. It accelerates upward at 32m/s2 for 34 s, then runs out of fuel. overlook any air resistance effects.
A circuit containing a 7.6 H inductor has an alternating current supplied to it. If Irms is 5.6 A and Vp is 28 V, find the frequency of the signal
A thin, horizontal, 10-cm-diameter copper plate is charged to 3.5nC. If the electrons are uniformly distributed on the surface, what are the strengths and direction of the electric field
Muons are created in the atmosphere by collisions of cosmic rays (mostly high energy protons) with air molecules. Muons have a rest energy of 105.7 MeV and a half life in the laboratory frame of 1.4μs. This lifetime can be increased indefinitely b..
A concave mirror has a focal length of 25.8 cm. The distance between an object and its image is 51.4 cm. Find (a) the object and (b) image distances, assuming that the object lies beyond the center of curvature and (c) the object and (d) image distan..
Consider the collision between two hockey pucks in the figure below. They do not stick together. What is the final velocity of the other puck
Two identical spacecraft are to be accelerated by rockets. The first rocket fires with a force 4 times as large as that of the second rocket. The acceleration of the first rocket is how many times as vast as the acceleration of the second rocket.
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