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A UV laser emits light that has a wavelength 350nm. If 1.23*10^18 photons are emitted in 10ns, what is the power of laser?
An engine operates between temperatures of 280 K and 700 K at 62.0 % of its maximum efficiency. how much work does the engine do
a parallel-plate capacitor has circular plates of 8.90 cm radius and 1.70 mm separation.a calculate the capacitance.b
At a rock concert, the engineer decides that the music isn’tloud enough. He turns up the amplifiers so that the amplitude ofthe sound where you are sitting increases by 50.0%.
A bicyclist is finishing his repair of a flat tire when a friend rides by with a constant speed of 3.6 m/s. How much time does it take until he catches his friend
Batman (mass = 95.9 kg) jumps straight down from a bridge into a boat (mass = 683 kg) in which a criminal is fleeing. The velocity of the boat is initially +8.67 m/s. What is the velocity of the boat after Batman lands in it?
In a rotor ride, which is a large hollow cylinder that is rotated rapidly around its central axis, people are rotated at a high speed. What minimum speed must the cylinder have if the rider is not to fall when the floor drops
A simple pendulum, 2.0 m in length, is released with a pushwhen the support string is at an angle of 25 from the vertical. what is its speed at the bottom of the swing
A copper wire of radius a = 0.331 mm has an aluminumjacket of outer radius b = 0.459 mm. There is a currenti = 2.23 A in the composite wire. Take the resistivity for copper and aluminum to be 1.69 x 10-8Ω·m and2.75 x 10-8Ω·m.
A certain alarm clock ticks four times each second, with each tick representing half a period. What is the torsion constant of the hairspring
If the separation between the two plates is double the value calculated in part (a), what potential difference is required for the capacitor to store charge of magnitude 260 pC on each plate
Susan is cleaning her house and dust particles are released into the air while she dusts. If two 7.0x10-14C pieces of dust exert an electrostatic force of 5.0x10-12N on each other, how far apart are the dust particles at that time?
A variable-frequency AC generator with maximum voltage 31 Volt is connected across a 9.8 × 10-8 F capacitor. Find at what frequency should the generator be operated
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