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A distant galaxy emits light that has a wavelength of 453.8 nanometer. On earth, the wavelength of this light is measured to be 455.5 nanometer.
(a) Decide whether this galaxy is approaching or receding from the earth.
(b) Evaluate the speed of the galaxy relative to the earth. (Give your answer to 4 significant digits. Use 2.998 x 108 m/s as the speed of light).
The density of ice is 917 kg/m3, and the density of sea water is 1025 kg/m3. What is the weight of the heaviest bear that the ice can support without sinking completely beneath the water
A 4.00 L sample of a diatomic ideal gas with specific heat ratio 1.40, confined to a cylinder, is carried through a closed cycle. Find the temperature at the end of the cycle
A drinking fountain projects water at an initial angle of 50 degrees above horizontal Water reaches maximum height of 0.150m above point of exit. Calculate gauge pressure in feeder pipe at this point
In deep space two spheres each of radius 5.00 m are connected by a 3.00 x 10^2 m nonconducting cord. If a uniformly distributed charge of 35.0 mC resides on the surface of each sphere, calculate the tension in the cord.
q1. a steel paper clip is bent by a force of 10.2 n exerted on it through a distance of 4.85 cm. by how much does
In the Bohr model of the hydrogen atom the electron orbits the proton in a circular orbit. Calculate the orbital frequency of the electron
A current of 17.0 mA passes through a circular cable of 2.0m of circumference. A magnetic field of 0.8T passes parallel to the plane of the "loop". calculate what is the magnetic moment of the loop
A 26.2-kg dog is running northward at 2.21m/s, while a 5.30-kg cat is running eastward at 2.83 m/s. Their 67.2-kg owner has the similar momentum as the two pets taken together. Find the magnitude and direction of the owner's velocity.
A 0.800 kg projectile is launched from the edge of a cliff with an initial kinetic energy of 1875 J and at its highest point is 211.2 m above the launch point. find the vertical component of its velocity just after launch
A hoodlum throws a stone vertically downward with an initial speed v0 from the roof of a building, a height h above the ground. How long does it take the stone to reach the ground
the volume of an ideal gas changes from .40 to .56 cm3 although its pressure remains constant at 50000 Pa. what work is done on the system by its environment
A 8.51 -m ladder with a mass of 21.8 kg lies flat on the ground. A painter grabs the top end of the ladder and pulls straight upward with a force of 245 N. What is the net torque acting on the ladder
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