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What compression (as measured from equilibrium) would result in 100J being stored for this spring? Show your work and express your final answer in cm.
A single-turn circular loop of radius 6.2 cm is to produce a field at its center that will just cancel the earth's field of magnitude 0.7 G directed at 70 below the horizontal north direction. Find
A 59 kg boy and a 39 kg girl use an elastic rope while engaged in a tug-of-war on a frictionless icy surface. If the acceleration of the girl toward the boy is 2.6 m/s2, determine the magnitude of
Its equilibrium position is at x=0. It is pulled aside a distance (A) and released. What is the speed of the mass as it passes the position x=A/2 (in terms of k,m, and A)?
What kind of equation or background information is useful for a problem like this?
How much energy was required to stretch the spring assuming you started from its unstretched length? How much energy (in Joules) must you use to stretch another 15cm (from 25cm to 40cm)?
What are three differences between the proton-proton chain and CNO cycle of nuclear fusion?
An arrangement of four point charges gives a field strength of 201 N/C in the +y direction at point P = (4, 1) m. If another charge of +7.80 μC is added at (-2, 5) m, what is the new field streng
If you are 5.00 {rm m} away from a lightning strike of 5.00×104 {rm A} (strikes of that magnitude do occur), what strength of magnetic field do you experience? Model the lightning as a long,
Stationary target and emerges with a speed of 900 m/s. The target is free to slide on a smooth horizontal surface. How long is the bullet in the target?
What is the equilibrium temperature of the coffee-cup system, assuming no heat is lost to the surroundings? The specific heat of aluminum is 900 J/(kg x K), and the specific heat of water is 4186 K/
The specific heat of mercury is 138 J/kg·C°. Determine the latent heat of fusion of mercury using the following calorimeter data: 1.00 kg of solid Hg at its melting point of -39.0°C
A 2 mol ideal gas system undergoes an adiabatic process where it expands and does 20 J of work on its environment. How much heat is received by the system?
A fire helicopter carries a 625 kg empty water bucket at the end of a cable 21.3 m long. As the aircraft flies back from a fire at a constant speed of 41.4 m/s, the cable makes an angle of 41.6°
If the coefficient of kinetic friction between the block and the surface is 0.24, and the impact drives the block a distance of 9.1 m before it comes to rest, what was the muzzle speed of the bullet
Why would an eclipsing binary be more valuable than an ordinary spectroscopic binary in accurately determining stellar parameters?
What fraction of the bullet's initial kinetic energy is dissipated (in damage to the wooden block, rising temperature, etc.) in the collision between the bullet and the block?
Learning Goal: To understand that the direction of acceleration is in the direction of the change of the velocity, which is unrelated to the direction of the velocity.
At a factory, a noon whistle is sounding with a frequency of 491 Hz. As a car traveling at 76 km/h approaches the factory, the driver hears the whistle at frequency fi. After driving past the facto
A space station, in the form of a wheel 133 m in diameter, rotates to provide an "artificial gravity" of 2.20 m/s2 for persons who walk around on the inner wall of the outer rim. Find the rate of t
A state trooper's car sends out a radar signal at a frequency of 11.7 GHz. Find the wavelength of this signal. The wave speed is 2.998 × 108 m/s.
In a simple atom, the electrons making transitions between the outermost energy levels and the innermost energy levels give rise to photons with the reddest colors?
A 1.50 kg object is held 1.20 m above a relaxed massless vertical spring with a force constant of 310 N/m. How far does it compress the spring if the same experiment is performed on the moon, where g
An green hoop with mass mh = 2.4 kg and radius Rh = 0.14 m hangs from a string that goes over a blue solid disk pulley. What is magnitude of the linear acceleration of the hoop?
A 32%-efficient electric power plant produces 800MW of electric power and discharges waste heat into 20C ocean water. Suppose the waste heat could be used to heat homes during the winter instead of