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A distant galaxy emits light that has a wavelength of 550.5 nm. On earth, the wavelength of this light is measured to be 450.8 nm.
(a) Decide whether this galaxy is approaching or receding from the earth. Give your reasoning.
(b) Find the speed of the galaxy relative to the earth.
A particle undergoes two displacements. The first has a magnitude of 119 cm and makes an angle of 106 degrees with the positive x axis. The resultant displacement has a magnitude of 111 cm and is directed at an angle of 37.7 degrees to the positive x..
You measure the length of a distant car to be subtended by an angular distance of 1.0 degrees. approximately how far away is the car
A water droplet of radius 0.015 mm remains hanging stationary in the air. If the electric field of Earth is 100 N/C, how many electrons must the water droplet lack? In which direction the electric field of Earth must be directed for that problem to m..
A father pulls his children in a wagon for 25 minutes covering 1.25 miles on a level sidewalk. What is the average horsepower required
A 78 person sits on a 3.6 chair. Each leg of the chair makes contact with the floor in a circle that is 1.0 in diameter. Find the pressure exerted on the floor by each leg of the chair
The weight of a block of metal is measured with a scale first in air, then in water. Find the specific gravity of the metal ( the ratio of the density of metal to the density of water). The tension of the block is measured 6.0N in air and 4.0N in wa..
you are 3.20 m from a plane mirror holding a camera and you want to take a photograph of your image in the mirror. to
question based on the body fat versus weight data set which variable is the predictor variable? which variable is the
At depths greater than 2 meters in Kansas, the wintertime soil temperature is approximately 15 degrees C. Determine the coefficient of performance
a block of mass 12.0 kg is connected to a spring on a horizontal frictionless surface. write the expression for the position of the block as the function of time
Obler's paradox presented the contrary facts that the universe had to be infinite and uniform in order to be stable and if the universe was infinite the night sky should be as bright the surface of the stars. How was the paradox resolved?
A glass window 0.35cm thick measures 84cm by 84cm. how much heat flows through this window per minute if the inside and outside temperture difference differ by 15 degree Celceus
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