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Our solar system is about 1.34 parsecs away from planet A. An astronaut is moving away from earth toward planet A at 0.80c as measured in the earth's reference frame. Assume that the distance between earth and planet A is constant. The astronaut has a red laser with a lambda=669nm pointed toward planet A and a green laser with a lambda=532nm pointed at earth. What frequency of light is observed by the earthlings? What frequency of light is observed by those around planet A? Is the light recieved by earth in the visible range of humans?
An electromagnetic wave in a vacuum has a magnetic field with a magnitude of 1.4 10-6 T. What is the intensity S of the wave
An elevator has a downward acceleration of 1 m/s2. A person, having a weight of 800 N as measured by a scale at rest on the ground, steps on a scale in the elevator. What does the scale read? A) 0 N. B) Approximately 80 N. C) Between 80 N and 800 ..
Material found with a mummy in the arid highlands of southern Peru has a _6^14 text(C) activity per gram of carbon that is 74.0% of the activity percent initially
A 150 g block of ice at 0 C is dropped into 350 g of water at 25 C, compute the final equilibrium temperature
Consider an infinite arrangement of capacitors shown in the figure. C1= nF and C2 = nF. What is the equivalent capacitance Ceq
A student decides to move a box of books into her dormitory room by pulling on a rope attached to the box. Find the acceleration of the box
Two loudspeakers emit 400Hz notes. One speaker sits on the ground. The other speaker is in the back of a pickup truck, What is the truck's speed in m/s
Inside a motor, 30.5 A passes through a 250 turn circular loop that is 10.0 cm in radius. what is the magnetic field strength created
A rod of length 30.0 cm has linear density (mass per length) given by: ?= 50.0 + 20.0x. What is the mass of the rod
The potential energy stored in the compressed spring of a dart gun, Find by how much is the spring is compressed
A 1.00 kg soccer ball is kicked down field at 5 m/s by a Bob on Team A. Tom, a member of Team B, runs up and kicks the ball so that it is traveling at 15 m/s, what is the impulse acting on the ball
A 4.79 crate is suspended from the end of a short vertical rope of negligible mass. An upward force is applied to the end of rope, and the height of the crate above its initial position is given by + (0.61) what is the magnitude of the force when ..
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