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What is the peak voltage across the capacitor? The generator frequency is now changed so that the circuit is in resonance. What is that new (resonance) frequency?
If each pellet is in contact with the wall for 0.80 ms, what is the magnitude of the average force on the wall from each pellet during contact?
What is the charge of the capacitor 1.95 time constants after the circuit is closed? What is the charge after a long time?
Find the angle between the direction of motion of the second ball and the original direction of motion of the cue ball. Find the origional speed of the cue ball.
If R = 12 cm, M = 370 g, and m = 40 g (below), find the speed of the block after it has descended 50 cm starting from rest. Solve the problem using energy conservation principles. Repeat with R = 5.
What is the maximum speed of a truck that you are sure will be stopped by this road, even if the frictional force of the road surface is negligible?
A particle of mass m = 4.24×105 eV/c2 moves in a three-dimensional box with edge lengths L1=0.54 nm, L2=1.08 nm, and L3=1.08 nm. Find the energies of the ground state and the next 5 excited s
A crate is pulled by a hoist a distance of 3.4m across the flat truck bed in 8 seconds. Determine the work done in moving the crate and the power of the hoist when the coefficient of friction is 0.6
How much (a) energy per cycle is delivered as heat to the room and (b) work per cycle is required to run the freezer? Give your answers in kJ.
If the heat pump were a Carnot heat pump (a Carnot engine working in reverse), how much energy would be transferred as heat to the room for each joule of electric energy consumed?
A Carnot engine whose low-temperature reservoir is at 19.7°C has an efficiency of 26.8%. By how much should the Celsius temperature of the high-temperature reservoir be increased to increase th
(a) What is the entropy change of a 15.2 g ice cube that melts completely in a bucket of water whose temperature is just above the freezing point of water? (b) What is the entropy change of a 4.27 g
Question: What is the probability of the electron in thee ground state of a hydrogen atom being found outside a sphere defined by Bohr radius?
After the collision, the orange disk moves along a direction that makes an angle of 35.0° with its initial direction of motion. The velocities of the two disks are perpendicular after the collis
What is the wavelength of the radiowaves emited by the radio station?
What is the force between the ball and the racket if the time that they interact is 0.08 s? Assume the force is constant.
A 5.41 x 10-5 H solenoid is constructed by wrapping 70 turns of wire around a cylinder with a cross-sectional area of 8.90 x 10-4 m2 When the solenoid is shortened by squeezing the turns closer togeth
(a) Calculate the current in the wire needed to create a 5.0×10-5 T (1/2 gauss) field at this distance. (b) What is unreasonable about this result? (c) Which assumption or premise is responsib
An ac generator has a frequency of 2.2 kHz and a voltage of 240 V. An inductance L1 =6.0 mH is connected across its terminals. Then a second inductance L2 =10 mH is connected in parallel with L1. Fi
Suppose that the inductance is zero (L = 0 H) in a series RCL circuit. The rms voltages across the generator and the resistor are 54 and 28 V, respectively. What is the rms voltage across the capaci
Two identical capacitors are connected in parallel to an ac generator that has a frequency of 650 Hz and produces a voltage of 24 V. The current in the circuit is 0.6 A. What is the capacitance of
(a) Find the power lost in heating the wires if the power is transmitted at 1800 V. (b) A 100:1 step-up transformer is used to raise the voltage before the power is transmitted. How much power is no
The primary coil is plugged into a standard 120-V outlet. The current in the secondary coil is 1.9 x 10-3 A. Find the power consumed by the air filter.
Find the emf induced in the toroid when the current decreases from 2.5 A to 1.1 A in a time of 0.15 s.