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Unpolarized light is incident on a system of 4 polarizers. Where the preferential direction of the second is 20 degrees with respect to the first, What is the intensity of the transmitted light
A 70.0-g object connected to a spring with a force constant of 25.0 N/m oscillates with an amplitude of 6.00 cm on a frictionless, horizontal surface. Find the total energy of the system
A car is traveling away from you at 40.0 mi/h. The car horn produces a sound at a frequency of 480 Hz. What frequency do you hear
A uniform disk of mass M = 5.6 kg has a radius of 0.14 m and is pivoted so that it rotates freely about its axis. What is the torque being exerted by this force about the rotation axis
What frequency is heard by an observer who hears the 450-Hz siren on a police car traveling at 35 m/s away from her
An unknown gas has a density of 1.584 kg/m3 at STP. (STP, for standard temperature and pressure, What is the gram molecular mass
a sodium atom emits a photon with wavelength 818 nm shortly after being struck by an electron
A galvanometer with a full-scale sensitivity of 800uA and a coil resistance of 54 ohms is to be used to build an ammeter designed to read 6.0A at full scale
A freezer of resistance 14.5ohms is connected to a 110V source. What is the power delivered when this freezer is on
A newly discovered planet has a mass of 7.88 x1026 kg, and has a satellite whose mass is 6.44 x 1011 kg. what is the gravitational attraction between them
the overhead cable for a street trolley is strung horizontally 5 m above the ground. What is the magnetic field at street level directly under the cable
Suppose that the dipole moment associated with an iron atom of an iron bar is 2.7 x 10-23 J/T. Assume that all the atoms in the bar, What is the dipole moment of the bar
A certain EM wave has a wavelength of 4 X 10 ^-7 m and a speed of 2.5 X10^8 m/s in a partcular material ( not a vacuum). what is the wavelength of this wave in a vacuum
A photon with an initial wavelength of 1.390Ã-10-11 m Compton scatters from an electron which is initially at rest. compute the kinetic energy of the scattered electron
The nucleus of an atom has a radius of about 7.9Ã-10-15 m. The electron is normally at a distance of about 3.4Ã-10-11 m from the nucleus, Find the volume of the nucleus
You are shining ultraviolet light on a gas of an unknown element. You know that an electron starts in a ground state with an energy of -16.30 eV. What is the energy of the first photon emitted
A railroad car of mass 2.44 104 kg, is moving with a speed of 3.96 m/s. It collides and couples with three other coupled railroad cars, What is the speed of the four cars after the collision
a heat engine operates between a hot reservoir at 950 degree celcius, what is the maximum possible efficiency
An air-core solenoid is attached to a 6 V battery via a switch. The switch is closed, what is the resistance and inductance of the coil
A certain EM wave has a wavelength of 4e-7 m and a speed of 2.5e8 m/s in a particular material (not a vacuum). What is the wavelength of this wave in a vacuum
an ac power generator produces 60 a (rms) at 4000 v. the voltage is stepped up by an ideal transformer, what is the turn ratio of the transformer
A thermodynamic system undergoes a process in which its internal energy decreases by 455 J. Find the energy transferred from it by heat
a series rlc ac circuit has resistance r = 200 ohms, inductance l = 0.500 H, capacitance c = 4.00 uf, frequency 60.0 hz, What are the maximum voltages across the elements
A 1.0 μF capacitor has a potential difference of 6.0 V applied across its plates. how much additional energy does the capacitor store
A disk having mass M and radius R spins about an axis through its center and prependicular to the flat face of the disk at angular velocity. calculate the moment of inertia of the rod about one end