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A Galaxy is moving away from us with a speed of 3 x 10^7 m s^-1. What is the frequency of the light we would observe if it is emitted at 6 x 10^14 Hz?
Runner A is initially 4.0mi west of a flagpole and is running with a constant velocity of 2.0 mi/h due east. How far are the runners from the pole when they meet
The partial pressure of oxygen in air is about 0.20 atm. (Air is 20% oxygen by volume.) In deep-sea diving, the composition of air the diver breathes must be changed to maintain this partial pressure. What must the oxygen content (in precent by volum..
An astronaut in a satellite says she can just barely resolve two point sources on the Earth, 110km below. Assume λ=540nm, and the pupil diameter of the astronaut's eye to be 5.20mm.
A stone thrown vertically upward with a velocity of 14.3 m/sfrom edge of a cliff 79m high. From its highest point it then fallsall the way to the base of the cliff.
An air puck of mass 0.897 kg is tied to a string and allowed to revolve in a circle of radius 1.23 m on a frictionless horizontal table. What is the speed of the puck
A copper block is removed from a 310 degrees Celsius oven and dropped into 1.20kg of water at 20.5 degrees Celsius. The water quickly reaches 25.5 degrees Celsius and then remains at that temperature.
A traveling wave in a string of linear density 0.01 kg per meter is described by the wave function y = 0.02 m sin(50 rad/m x - 1750 rad/s t). find the wave speed and the tension in the string
The magnitudes of the concave and convex surfaces of a glass lens are 200 and 600 mm, respectively. What is the focal length? Is it diverging or converging?
A 49g marble moving at 1.9m/s strikes a 24g marble at rest. What is the speed of the first marble immediately after the collision
A speedboat starts from rest and accelerates at +2.42 m/s2 for 8.71 s. At the end of this time, the boat continues for an additional 4.33 s with an acceleration of +0.654 m/s2. Find the total displacement of the boat
A series AC circuit contains a 159 ? resistor, a 360 mH inductor, a 2.4 µF capacitor, and a generator with maximum voltage of 240 V operating at 50 Hz. Calculate the inductive reactance
A banana has 0.45 g of potassium. 0.0117% of that potassium is 4019K, What is the activity of the banana
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