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The ball has a mass of m and is fixed to a rod having a negligible mass. If it is released from rest when theta=0, determine the angle theta at which the compressive force in the rod becomes zero.
A parallel plate capacitor has a capacitance of 6.7 µF when filled with a dielectric. The area of each plate is 1.4 m2 and separation between the plates is 9.40 10-6 m. What is the dielectric
Two semicircular rods, one with a 100.0 mm radius R1 and the other with a 180.0 mm radius R2, have a common center of curvature C, and carry equal charges of magnitude Q=25.00 mC distributed uniform
The nucleus of 8Be, which consists of 4 protons and 4 neutrons, is very unstable and spontaneously breaks into two alpha particles (helium nuclei, each consisting of 2 protons and 2 neutrons). (a)
It is placed in a constant magnetic field, with a strength of 4.82E-3 T, that is horizontal and perpendicular to the wire. As the wire moves upward starting from rest, what is its acceleration? Negl
During this process, no net charge is removed from or added to the two-sphere system. After the spheres are separated, what is the net charge on sphere B?(c) Justify your answer to part (b). This pa
A light bulb has a resistance of 210 . It is connected to a standard wall socket (120 V rms, 60.0 Hz). (a) Determine the rms current in the bulb. A (b) Determine the rms current in the bulb after a
A 28.0 mH inductor has a reactance of 2.20 k. (a) What is the frequency of the ac current that passes through the inductor?
A spaceship approaches an asteroid and sends out a radio signal with proper frequency 6.5 x 10^(9) Hz. The signal bounces off the asteroid's surface and returns shifted by 5 x 10^(5) Hz. What is th
What is the minimum magnitude of the force F, parallel to the plane, that will prevent the sled from slipping down the plane?
A bead is able to slidealong a small wirein the form of a parabola. the parabola is rotating with constant angular velocity about it vertical symmetrical axis. write down the equation of motion of t
The normal human eye has maximum visual acuity with a pupil size of about 3 mm. For larger pupils, acuity decreases due to increasing aberrations; for smaller pupils, acuity decreases due to increas
A loaded penguin sled weighing 90 N rests on a plane inclined at 20° to the horizontal. Between the sled and the plane the coefficient of static friction is 0.29, and the coefficient of kinetic fr
A projectile is at the highest point in its path. Is its acceleration at this instant greater than, less than, or equal to its acceleration just after it was launched? My initial thought is equal to
Calculate the ratio of the drag force on a passenger jet flying with a speed of 1100 km/h at an altitude of 10 km to the drag force on a prop-driven transport flying at two-thirds the speed and half
A 11µ F capacitor is joined in series with a 35µ F capacitor and a 12 Volts battery. A) What is the potential difference across the first capacitor?
A stone thrown horizontally from a height of 5.92 m hits the ground at a distance of 13.50 m. Calculate the speed of the stone as it hits the ground. Neglect air resistance.
Light of wavelength 466 nm is incident normally on a film of water 1.0 µm thick. The index of refraction of water is 1.33. (a) What is the wavelength of the light in the water?
A motor is designed to operate on 132 V and draws a current of 9.4 A when it first starts up. At its normal operating speed, the motor draws a current of 3.90 A. (a) What is the resistance of the ar
Force from an auxiliary motor: 9 N, 20 degrees E of N Force due to the wind: Fwind What is the net force (Fnet) acting on the boat? ? N ?degrees N of E What is the force of the wind (Fwind) on the b
In a wire with a 1.09-mm2 cross-sectional area, 5.17 × 1020 electrons flow past any point during 3.73 s. What is the current in the wire? Find the current density.
(a) What equal positive charges (in Coulombs) would have to be placed on two celestial objects with masses 7.18 x 1026 and 9.79 x 1021 kg to neutralize their gravitational attraction? (b) What mass o
An electron in a certain region of space has an electric potential energy given by U(x) = [(7.60*10^-15 J)x + (4.80*10^-16 J/m)x^3] in terms of its position on the x-axis. Determine (a) the electric
A one kilomole of an ideal gas under goes a reversible isothermal expansion from a volume of 5 liters to a volume of 10 liters at a temperature of 20 degrees Celsius What is the change in entropy of
The electric field 4.00cm from a very long charged wire is ( 2300N/C ,toward the wire). What is the charge (in nC) on a 1.0-cm-long segment of the wire?