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A shopper standing 2.40 m from a convex security mirror sees his image with a magnification of 0.240. What is the focal length of the mirror
A camera lens used for taking close-up photographs has a focal length of 23.5 mm. The farthest it can be placed from the film is 33.5 mm. What is the closest object that can be photographed
Light of a wavelength of 661.1 nm is received from a star that is emitting light of wavelength of 659.6 nm. How fast is the star moving relative to the earth
A certain type of propeller blade can be modeled as a thin uniform bar 2.80m long, find the maximum angular acceleration the blade could achieve
A flywheel having constant angular acceleration requires 4.40s to rotate through 169rad . Its angular velocity at the end of this time is 110rad/s. find the angular acceleration of the flywheel
A copper beaker of mass 0.20 kg contains 0.10 kg of water at 20.0 C. A block of silver of mass 100 g at 90.0 C is added to the beaker of water. What is the heat lost by the silver
A metallic, spherical Christmas tree ornament has a diameter of 16.00 cm. find where will he see his reflection in the mirror
A 500-turn circular coil with an area of 0.0500 m^2 is mounted on a rotating frame, What is the instantaneous emf in the coil at the moment that the normal to its plane is parallel to the field
A 20.0L tank contains 0.225kg of helium at 18.0%u2218C. The molar mass of helium is 4.00g/mol. How many moles of helium are in the tank
The dial on an FM radio contains numbers ranging from about 88 to about 108. What is the corresponding range of wavelengths
A 28.0kg child plays on a swing having support ropes that are 2.10m long. How fast will she be moving at the bottom of the swing
Light of wavelength 380 nm is required to cause electrons to be ejected from the surface of a metal. What is the kinetic energy of the ejected electrons
A perscription for a corrective lens calls for +1.5 D. The lensmaker grinds the lens from a "blank" with n=1.55, What should be the radius of curvature of the other surface
A flat coil of wire of 18 turns and area 4 m^2 is placed in a uniform magnetic field of 0.6 T. Determine the magnetic flux through the coil
Three resistors, of 8.0 %u03A9, 12 %u03A9, and 24 %u03A9, are in parallel, and a current of 20 A is drawn by the combination. Determine the potential difference across the combination
You note that your prescription for new eyeglasses is -3.75 D. What will their focal length be
In a series R-L-C circuit, L=.165H C=85.0uF and the voltage amplitude of the source is 200V. What is the resonace angular frequency of the circuit
A solenoid is designed to prodcue a 2.78*10^-2 T magnetic field near its center. It has a radious of 1.4cm, What total length of wire is required to make this solenoid
To fit a contact lens to a patient's eye, a keratometer can be used to measure the curvature of the cornea-the front surface of the eye. Determine the radius of curvature of the cornea
Two particles are created in a high-energy accelerator and move off in opposite directions. What is the speed of the second particle, as measured in the laboratory
What is the wavelength of EM radiation that ejects 2.00-eV electrons from calcium metal, given that the binding energy is 2.71 eV
What quantum number of the hydrogen atom comes closest to giving a 100- nm-diameter electron orbit, What is the electron's speed in this state
A soap film whose index of re%uFB02ecetion is 1.33 is suspended in air. When sunlight strikes the film nearly perpendicularly, Find the thickness of the film
Two 2.0 cm x 2.0 cm square electrodes, spaced 0.4 mm apart, are connected to a 10 V battery. What is the charge on each electrode
A transformer has input voltage and current of 12 V and 6 A, and an output current of 0.8 A. how many turns are on the primary side