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A 6.2\({\rm ft}\) tall shopper in a department store is 18\({\rm ft}\) from a convex security mirror, What is the mirror's radius of curvature
A certain ohmic resistor has a resistance of 45 ohms. A second resistor is made of the same material but is two times as long, What is the effective resistance of the two resistors in series
The Hale Telescope The 200-inch-diameter concave mirror of the Hale telescope on Mount Palomar has a focal length of 16.9, What is the magnification of her image
A person drops a cylindrical steel bar (Y = 6.0 × 1010 Pa) from a height of 2.00 m (distance between the floor and the bottom of the vertically oriented bar). The bar, of length L = 0.58 m, ra
A series ac circuit contains a 250? resistor, a 20.0mH inductor, a 3.50?F capacitor, Find the average power delivered to the entire circuit
A 171 kg block of ice at 0.0°C is placed in a large lake. The temperature of the lake is just slightly higher than 0.0°C, and the ice melts very slowly, What is the entropy change of the uni
In a series R-L-C circuit, L = 0.205H , C = 80.5?F and the voltage amplitude of the source is 260V, What is the resonance angular frequency of the circuit
In reality, the COP of the heat pump will only be 60 percent of the ideal value. What is the minimum power of the electric motor when the COP is 60 percent of the ideal value
A 2100 kg truck traveling north at 41 km/h turns east and accelerates to 54 km/h, What is the change in the truck's kinetic energy
When the coil of a motor is rotating at maximum speed, the current in the windings is 4.33 A. When the motor is first turned on, calculate the resistance of the windings.
If you put a 0.28 kg mass 15 cm from the axis of a massless disk, and you apply a 0.4 N force on a string wrapped at the disk's edge, what is the resulting angular acceleration
If you apply a 4 N force on a string wrapped around an object that has an inertia of 0.03 \mathrm{kg\:m}^2 , what is the angular acceleration you expect from the falling object
In a series R-L-C circuit, the phase angle is 40.5?, with the source voltage leading the current, Find the reactance of the inductor
A parallel-plate capacitor is constructed with circular plates of radius 5.5×10?2m . The plates are separated by 0.23mm, Find the value of the dielectric constant, ?.
In a series R-L-C circuit, R = 320? , XC = 260? and XL = 600? . The average power consumed in the resistor is 60.0W. What is the rms voltage of the source
When an ion accelerates through a potential difference of 2240V, What is the charge on the ion
A 13.1 k? resistor and a capacitor are connected in series and then a 12.0 V potential difference is suddenly applied across them, Calculate the time constant of the circuit
A 260(omega) resistor is in series with a 9.50×10?2H inductor and a 0.56 (mu)F capacitor. Compute the impedance of the circuit at a frequency of f1 = 500 Hz
An air-filled parallel-plate capacitor has plates of area 2.50 cm2 separated by 2.00 mm. The capacitor is connected to a 3.0-V battery, What is the magnitude of the uniform electric field between the
A father racing his son has half the kinetic energy of the son, who has one-third the mass of the father, What is the original speed of the father
A loudspeaker of mass 18.0kg is suspended a distance of h = 2.00m below the ceiling by two cables, What is the Tension T in each of the cables
Two plates of area 30.0 cm2 are separated by a distance of 0.0150 cm. calculate the potential difference (voltage) between the two plates
Visible light passes through a diffraction grating that has 900 slits per centimeter, What is the difference between these wavelengths
Calculate the magnetic force per meter between two such lightning bolts separated by 10 meters. (This is mainly to give a feeling for the strength of the magnetic field)
The focal length of the human eye is approximately 1.7 cm. What is the f-number for the human eye in bright light, when the pupil diameter is 3.0mm