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A 86-mW vertically polarized laser beam passes through a polarizer whose polarizing angle is 25° from the horizontal. What is the power of the laser beam when it emerges from the polarizer?
Two polarizers are out of alignment by 30°. If light of intensity 7.57 W/m2 and initially polarized halfway between the polarizing angles of the two filters passes through the two filters, what
Every day our Earth receives 1.55×1022 J energy from the Sun. If we were able to use 0.75 percent of this energy to accelerate spaceships, then how many missions would be possible in one year?
Light of wavelength 671 nm is incident on a single slit. The central bright fringe is 2.60 cm wide on a flat screen that is 77.4 cm from the slit. What would be the width of the central bright fri
A thin layer of oil of refractive index 1.18 is spread on the surface of water (n=1.33). If the thickness of the oil is 260 nm, then what is the wavelength of visible light in air that will be pre
The interference pattern shows a peak at the center of the screen (m=0) and then alternating minima and maxima.What is the path length difference between the waves at the first maximum (m=1) on the sc
One bright summer day a swimmer is floating with her head just above the surface of a large lake where the water has index of refraction n = 1.38. Nearby she sees a tall wooden post emerging from t
The atomic ratio of Uranium-235 to Uranium-238 in current uranium is 1:139. What was the ratio of these two isotopes when the natural reactor went critical. Show your work.
Calculate and compare the electron densities of a piece of aluminum 1 cm thick and a piece of iron of the same density thickness. Show your work & please be sure to compare.
Assuming the specific heat of the body is the same as water, calculate the temperature rise due to a total body dose of 10 Gy (1000 rad). Show your work.
A neutron passes two points 1.0 meter apart in 1.0 microsecond. Calculate the neutron's energy in units of both joules (J), ergs and electron volts (eV). Show all
A) When the energy in the inductor is 2/3 of its maximum value, what is the voltage across the resistor? The inductor ?
A solenoid with 500 tunrs per cm, length 18cm, radius of r=10mm and a resistance of R=20 . The coil carries a current i=2A . What is the rate of change of the current in the coil ?
When the energy in the inductor is 2/3 of its maximum value, what is the voltage across the resistor? The inductor ?
The solenoid carries a current i=7sin(wt) a) what is the magnetic field through the small coil? b) What is the flux though the small coil? c) What is the rate of change of flux through the small coi
An inductor of L=0.7H and a charged capacitor C=5F with Q =20C are connected to each other. How much energy is stored in the capacitor initially? When the current in the circuit is 1/2 its maximu
Neglecting the variation of T with altitude and using the average surface temperature of 290K and the number average molecular weight of 29 for air, calculate the atmospheric pressure at the top of
For N2 at 25oC and 1.00 atm calculate the number of collisions per second made by one molecule; the number of collisions per second per cubic centimeter; compare these values to N2 at 25oC and 1.0*1
Dry air had a CO2 mole fraction of 0.00038 in 2007 (compared with 0.00032 in 1965). Calculate the total mass of CO2 that strikes 1 cm^2 of one side of a green leaf in 1 s in dry air at 25oC and 1.00
At what temperature will H2 molecules have the same rms speed at O2 molecules have at 20oC? Solve this problem without claculating vrms for O2. Show all calculations.
If the temperature of the rod increases by 70.4°C, calculate its increase in length. (Use 9.0×10-6 °C-1 for the coefficient of linear expansion for glass. Use this value to find the co
When you take a bath, how many kilograms of hot water (48.8°C) must you mix with cold water (13.6°C) so that the temperature of the bath is 36.5°C? The total mass of water (hot plus cold
A 0.335 kg iron horseshoe that is initially at 420°C is dropped into a bucket containing 20.3 kg of water at 22.1°C. What is the final equilibrium temperature (in °C)? Neglect any heat t
To help keep his barn warm on cold days, a farmer stores 832 kg of solar-heated water (Lf = 3.35E+5 J/kg) in barrels. For how many hours would a 2.07 kW electric space heater have to operate to prov
a particle with spin 1 has orbital angular momentum l=0. what are the possible values for the total angular momentum quantum number j?