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A 0.48 m long guitar string, of cross-sectional area 1.0 10-6 m2, has Young's modulus Y = 1.90 109 N/m2. By how much must you stretch the string to obtain a tension of 30 N?
The fundamental frequency of a standing wave on a 1.3-m-long string is 410Hz. What would be the wave speed of a pulse moving along this string
A certain lightbulb has a tungsten filament having a resistance of 16 ? at 22°C and 155 ? when hot. Find the temperature of the filament when it is hot
A hospital patient has been given 131-I (half-life = 8.04 days) which decays at 6.2 times the acceptable level for exposure to the general public
At a grinding wheel has an angular velocity of 27. It has a constant angular acceleration of 26.0 until a circuit breaker trips at time = 1.60 . From then on, it turns through an angle 433 as it coasts to a stop at constant angular acceleration.
Ball A is fired straight upward, Ball B is fired straight down, and Ball C is fired horizontally. Rank, from largest to smallest, the speed of each ball at the instant (just before) it collides with the ground.
A 2720 - ? resistor and a 1.8 - ?F capacitor are connected in series across a generator (60.0 Hz, 120 V). Determine the power delivered to the circuit
A total of 3.02 106 electrons are placed on an initially uncharged wire of length 1.45 m. What is the magnitude of the electric field a perpendicular distance of 0.400 m away from the midpoint of the wire?
A heater coil connected to a 240 Vrms ac line has a resistance of 34 Ohms. find min values of the instantaneous power
A wagon is rolling forward on level ground. Friction is negligible. The person sitting in the wagon is holding a rock. Find the speed of the wagon after the rock is thrown
A baseball is thrown from the roof of 21.1 m-tall building with an initial velocity of magnitude 11.6 m/s and directed at an angle of 53.9 above the horizontal. Use = 9.80 m/s^2. What is the speed of the ball just before it strikes the ground
Particle X has a speed of 0.960 c and a momentum of 1.70×10-18 kgm/s. What is the mass of the particle? What is the rest energy of the particle? What is the kinetic energy of the particle?
The bullet lodges in the forehead of the victim and comes to a rest. If the victim's head has a mass of 5 kg and was at rest before impact, what is the stress on the cervical vertebra
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