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A steel wire in a piano has a length of 0.5000 m and a mass of 3.600 10-3 kg. To what tension must this wire be stretched so that the fundamental vibration corresponds to middle C (fC = 261.6 Hz on the chromatic musical scale)?
The magnetic flux through a coil of wire containing two loops changes from -23Wb to +33Wb in 0.57s. What is the emf induced in the coil
If the lifeguard can swim at a speed of 2.0 m/s relative to the water, how long does it take her to reach the child? How far downstream does the lifeguard intercept the child?
A person is drinking water from a plastic bottle. When the water level is 6cm from the top of the bottle, the person blows across the top producing a sound
An object has a kinetic energy of 317 J and the momentum of magnitude 24.0 kg · m/s.
using the expression relating the rate at which current changes in an inductor to the voltage produced at it find the
8g of helium at an initial temperature of 280Kinteracts thermally with 7.0g of oxygen at an initial temperature of 550K What is the final thermal energy of each gas
Gamma rays are photons with very high energy. How Many visible light photons with a wavelength of 500 nm would you need to match the energy of a gamma ray photon with energy 2.2x10^-13J
A mass of 0.450 kg rotates at constant speed with a period of 1.45 s at a radius of R 0.140 m . What is the rotation period for a mass of 0.550kg at the same radius
A planet moves in an elliptical orbit around the sun. The mass of the sun is Ms. The minimum and maximum distances of the planet from the sun are R1 and R2, in that order.
A 88.0kN spaceship comes in for a vertical landing. From an initial speed of 1.00 km/s, it comes to rest in 2.50min with uniform acceleration. What braking force must its rockets provide? Ignore air resistance.
A 0.460-kg toy is undergoing SHM on the end of a horizontal spring with force constant k = 500 N/m. find the maximum speed attained by the object during its motion
What is the formula for finding tension. The problem is there are 3 objects, M1=M2=M3, all of them are connected by rope. How much tension is on the rope in between M1 and M2
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