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Red shift: Consider a neutron star with a mass 2.8 x 10^30 kg and a radius of 10^4 m. Now suppose a photon by initial frequency of 600 Hz is shot straight up from the surface. Compute the frequency gauged by a distant observer.
A 3.60 {rm m}-long, 430 {rm kg} steel beam extends horizontally from the point where it has been bolted to the framework of a new building under construction. A 66 {rm kg} construction worker stands at the far end of the beam.
A child is playing by jumping on a bathroom scale. The mass of the child is 31 kg and when he stands on a bathroom scale, the spring inside the scale compresses 0.46 mm. what is the maximum height the child can jump on the scale
A charge particle of mass .0020kg is subjected to a 6 T magnetic field which is acts as a right angle to its motion. if the particle moves in a circle of radius .20m at a velocity of 5.0 m/s. what is the magntiude of the charge on the particle.
A 4.4 cm radius ball rolls down an inclined plane from rest at the top. The angular acceleration of the rolling ball about its center is 185 rad/s^2, How long is the plane
Jet fighter planes are launched from aircraft carriers with the aid of their own engines and a catapult. what is the work done on the jet by the catapult
if you weigh 637N on earth's surface, how much would you weigh on the planet Mars? (Mars has a mass of 6.37x10^23 kg and a radius of 3.43x10^6 m)
A large stick is pivoted about one end and allowed to swing back and forth as a physical pendulum. what is its moment of inertia, about an axis through the pivot
a 2.70of capacitor is charged to 500v and a 3.70opf capacitor is charged to 530v .part a these capacitors are then
An air conditioner is used to keep the interior of a house at a temperature of 20 C while the outside temperature is 35 C. If heat leaks into the house at the rate of 12 kW, and the air conditioner has the efficiency of a Carnot engine, what is the m..
A bare helium nucleus has two positive charges and a mass of 6.64 10-27 kg. What voltage would be needed to obtain this energy
An electromagnetic field is generated by
A Geiger counter reading of a radioactive sample is initially 6920 counts per minute. What is the sample's half-life
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