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What are (a) the energy, (b) the momentum, and (c) the wavelength of the photon that is emitted when a hydrogen atom undergoes a transition from the state n = 3 to n = 1?
A mechanic jacks up the front of a car to an angle of 8.0 degrees with the horizontal in order to change the front tires. Calculate the magnitude of the torque excerted by the jack
Two capacitors are connected to a battery. The battery voltage is V = 70 V, Determine the total energy stored by the two capacitors
A circuit contains sic 60 W lamps with a resistance of 240 ohm each and a 10 ohm heater connected in parallel. The voltage across the circuit is 120 V. Find the current in the circuit.
Calculate the force of gravity on a spacecraft 32000 km (5 earth radii) above the Earth's surface if its mass is 1800 kg. N (toward the earth)
A wave on a string has an amplitude of 0.32 m, a frequency of 120 Hz, and a wavelength of 1.4 meters. What is the maximum speed of a point of the string
An eagle can determine that two light brown shrews sitting 1.0 cm apart on a pathway 125 m below her are in fact two shrews rather than a small rat. estimate the diameter of her pupil
A 2.5-m-long steel wire in a musical instrument has a radius of 0.02 mm. When the wire is under a tension of 91 N, how much does its length change
A spring of constant 290 N/m is used to launch a 1.2 kg block along a horizontal surface whose coefficient of sliding friction is 0.27
Suppose that when you ride on your 7.60kg bike the weight of you and the bike is supported equally by the two tires. What is your weight
Beginning with expressions for the reactance of a capacitor and an inductor, derive an expression for the resonant frequency
Units of km
A 75 g piece of ice at an initially unknown temperature is placed into a glass of 350 g of water sitting at room temperature when it is 75ºF in the room. The glass and ice come to thermal equilibrium at 4ºC.
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