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An object is placed in front of a converging lens in such a position that the lens (f = 13.1 cm) produces a real image located 22.0 cm from the lens. What is the image distance of this new image
When a converging lens is used in a camera (as in the first drawing), the film must be placed at a distance of 0.170 m from the lens to record an image of an object that is 4.70 m from the lens
A shaving/makeup mirror is designed to magnify your face by a factor of 1.21 when your face is placed 19.5cm in front of it
Two sinusoidal waves of the same frequency travel in the same direction along a string. what is the amplitude (in cm) of the resultant wave
A small moon of a giant planet has an orbital period of 1.43 days and an orbital radius of 4.69 multiply.gif 105 km. determine the mass of the planet
A satellite moves in a circular orbit around Earth at a speed of 4439 m/s. Determine the period of the satellites orbit
A motor contains a coil with a total resistance of 10 ohms and is supplied by a voltage of 120V. What is the current the instant the motor is turned on
The drawing shows three identical rods (A, B, and C) moving in different planes. Find the magnitude of the motional emf for the rods
A 12-kg block initially slides at 18 m/s on a flat rough surface and eventually stops. what is the entropy change of the system
A Carnot engine takes an amount of heat QH = 111 J from a high-temperature reservoir at temperature TH = 1030 °C, Find the amount of work that is obtained from this process
Consider a Carnot engine that works between thermal reservoirs with temperatures of 1030.0 K and 297.0 K. How much energy is delivered to the cooler reservoir
With each cycle, a 2430-W engine extracts 2080 J from a thermal reservoir at 90 °C and expels 1510 J into a thermal reservoir at 20 °C. How much time does each cycle take
A long, narrow horizontal slit lies 1.00 µm above a plane mirror, which is in the horizontal plane. Find the distance from the mirror to the first maximum
A spring is mounted from the ceiling. As a mass is attached, the spring stretches 1.04 m. What will be the frequency of the resulting oscillation
In a hot star, because of the high temperature, an atom can absorb sufficient energy to remove several electrons from the atom. Find the wavelengths of the next three spectral lines nearest to the lin
When responding to sound, the human eardrum vibrates about its equilibrium position. What is the frequency (in Hz) of the eardrum's vibrations
A 84.3-kg horizontal circular platform rotates freely with no friction about its center at an initial angular velocity of 1.67 rad/s. Find the angular velocity of the platform with its load
A laser-beam is fired through the air into a solid block of diamond (don't ask where we got it, it's a secret). What is the angle of refraction within the diamond
Light in vacuum is incident on the surface of a glass slab. In the vacuum the beam makes an angle of 41.5° with the normal to the surface, What is the index of refraction of the glass
A carbon resistor is made of a cylinder of carbon, of diameter 7.4 mm. what is the length of the cylinder
A student is looking at a monochromatic light source and is looking for the third bright fringe. At what angle should the student look for the third bright fringe
A wheel of diameter 24.0 cm is constrained to rotate in the xy plane, about the z axis, which passes through its center. What is the torque about the rotation axis at this instant
An object with a mass of m = 4.8 kg is attached to the free end of a light string wrapped around a reel of radius R = 0.225 m, Determine the magnitude of the acceleration of the object
In a physics lab experiment for the determination of moment of inertia, a team weighs an object and finds a mass of 3.38 kg. What is the moment of inertia of the object
A gate is free to rotate without friction about its hinges at H. The gate is initially at rest. Compute the magnitude of the mud's angular momentum about H