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The stationary siren on a firehouse is sounding at 85 Hz. What is the frequency received by a firefighter racing toward the station with a speed of 108km/h?
Two ice skaters, with masses of 50.0kg and 65.0kg , are at the center of a 40.0m -diameter circular rink. how long does the lighter skater take to reach the edge
A uniform solid sphere of mass 1.5 kg and diameter 30.0 cm starts from rest and rolls without slipping down a 35° incline that is 7.0 m long. Determine the angular speed of the sphere about its center at the bottom of the incline
What is the largest slit width for which there are no minima when the wavelength of the incident light on the single slit is436nm?
A photon of energy E collides with an electron at rest. Calculate the maximum amount of energy Ek that may be transfered to the electron. Make a graph of Ek versus E, labeling the scale in electron volts.
A sled rests at the top of a 25° slope 80 m in length. If ?k =.25, and the velocity at the bottom of the incline is 20 m/s, what is the weight of the sled
Waves travel at different velocity in different medium. How does wave velocity effect wave frequency
Suppose you were to wrap the planet Mars in aluminum foil and place a charge Q on it, What is the capacitance of Mars in this case
If you reach a magnitude m=20 at signal to noise of 10 in 5 seconds on a 2-m telescope, how long would it take to reach m=25 at signal to noise of 5 on an 8-m telescope at the same site
what would the g-force, kinetic energy and overall force a human head would absorb if they were broadside t-boned by an 80,000 pound tanker that was moving 45 miles per hour and that head absorbing party
A 29 cm long solenoid, 1.8 cm in diameter, is to produce a 0.24 T magnetic field at its center. If the maximum current is 5.7 A, how many turns must the solenoid have
A 44.0 g marble is fired vertically upward using a spring gun. What is the change in gravitational energy of the marble during its ascent
Although there are a lot of ways to detect planets, can someone further expand on the techniques and methods used to determine the composition of planets detected outside the solar system ?
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