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When viewed by an observer on the Earth, light from a distant galaxy is Doppler shifted to the red such that the ratio of the unshifted frequency to the observed frequency is 1.8. What is the galaxy's speed relative to the Earth?
if the radius of a blood vessel is reduced by cholesterol deposits to 90 of its original value flow will decrease. by
Light from a laser beam with a wavelength of 600 nm passes through a narrow single slit and observed on a screen 1.5 m behind the slit. The first minimum of the diffraction pattern is 1.5 cm from the central maximum. How wide is the slit?
An infinitely long, cylindrical, insulating shell of inner radius a and outer radius b has a uniform volume charge density ?. A line of uniform linear charge density ? is placed along the axis of the shell. Determine the electric field in the foll..
You plan to fly a model airplane of mass 0.390 kg that is attached to a horizontal string. The plane will travel in a horizontal circle of radius 5.90 m. Find the speed at which you must fly the plane
That is the sound from the organ bounces back and forth off the church walls many times before the sound inentsity decays away completely. If the reverberation time is 10s and the church has the approximate shape
What is this value? In this state, the interference pattern still appears showing that each individual electron can interfere with itself.
A brick is thrown upward from the top of a building at an angle of 45° to the horizontal and with an initial speed of 10 m/s. If the brick is in flight for 2.8 s, how tall is the building.
A certain lightbulb has a tungsten filament with a resistance of 19.4 ? when at 20.0°C and 150 ? when hot. Assume the resistivity of tungsten varies linearly with temperature even over the large temperature range involved here. Find the temperature o..
The applied force acts for 5.9 s, during which time the angular speed of the wheel increases from 0 to 12 rad/s. The applied force is then removed, and the wheel comes to rest in 65 s. Illustrate what is the frictional torque?
A parallel-plate capacitor is constructed with circular plates of radius 6.0×10?2m . The plates are separated by 0.26mm, Find the value of the dielectric constant
Typical roller coasters only have one motor to pull the cars up to the top of the first and highest hill. explain why the first hill must be the highest
A comet moves about the Sun in an elliptical orbit, with its closest approach to the Sun being about 0.680 AU and its greatest distance from the sun being 38.5 AU. what is its speed when it is farthest from the Sun
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