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A toy gun used to fire marbles into the air has a spring with k=50.0N/m. The spring is compressed 2.83 cm, and it launches a 6.14 gram marble straight up into the air from ground level. How high does the marble go if air resistance is neglected?
In the Bohr model of the hydrogen atom, what is the de Broglie wavelength for the electron when it is in the n = 2 level
Suppose you board a space ship when you are 20 years old and travel to a star located 43 light years from earth. If the ship travels at 0.993 c, how old will you be when you arrive?
A block of mass m is accelerated across a rough surface by a (massless) rope passing over an ideal pulley and connected to a second mass m2. Derive an expression for the acceleration of the sliding block
The frequency of a steam train whistle as it approaches you is 538Hz. After it passes you, its frequency is 486Hz. How fast was the train moving
A sample of 755 moles of nitrogen gas is maintained at aconstant pressure of 1.00 atm in a flexible container.The gas is heated from 40.2oC to177oC. Calculate the change in internal energy
A light bulb emits light uniformly in all directions. The averageemitted power is 150.0 W. At a distance of 4 m from the bulb,determine (a) the average intensity of the light,(b) the rms value of the electric field, and(c) the peak value of the elect..
A novice skier, starting from rest, slides down a frictionless 37.0° incline whose vertical height is 175 m. Explain how fast is she going when she reaches the bottom?
In addition, snow exerts a retarding force on the sled that points opposite to the direction of motion, and has a magnitude of 57 N. Find out the acceleration of the sled and child.
A crate of mass 10.2 kg is pulled up a rough incline with an initial speed of 1.52 m/s. What is the change in kinetic energy of the crate
question1a dolphin located in sea water at a temperature of 26c emits a sound directed toward the bottom of the ocean
The x and y components of a vector A are -25.0 m +40.0 m. respective y. What is the angle between the direction of A and positive direction of x?
An electric field of 254,000 N/C points due west at the certain spot. What are the magnitude and direction of the force that acts on the charge of -8.1 µC at this spot.
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