Physics Ray Optics Level: University
Wave opticsAn FM radio station has a frequency of 107.9 MHZ and uses two identical antennas mounted at the same elevation 12.0 m apart. The antennas radiate in phase. The resulting radiation pattern has a maximum intensity along a horizontal line perpendicular to the line joining the antennas and midway between them. Assume that the intensity is observed at distances from the antennas that are much larger than 12.0m. At what angles (measured from the line of maximum intensity) the intensity is maximum and at what angle is it zero.
Physics Ray Optics Level: University
InterferenceCoherent light from a sodium-vapor lamp is passed through a filter that blocks everything except for the light of a single wavelength. It then falls on two slits separated by 0.460 mm. In the resulting interference pattern on a screen 2.20 m away adjacent bright fringes are separated by 2.82 mm. What is the wavelength?
Physics Ray Optics Level: University
ReflectionProve that a ray of light reflected from a plane mirror rotates through an angle 2 theta when the mirror rotates through an angle theta about an axis perpendicular to the plane of incidence.
Physics Ray Optics Level: University
RefractionA horizontal parallel-sided plate of glass having a refractive index of 1.52 is in contact with the surface of water in a tank. A ray coming from above in the air makes an angle of incidence of 35 degrees with the normal to the top of the surface of the glass. What angle does the ray refracted into the water makes with this angle does the ray refracted into the water makes with this angle on the refractive index of the glass?
Physics Alternating Current Level: University
When the switch is closed describe what the two measuring devices connected in parrallel will display for you. ( use diagrams if necessary) will the output data change over time? and if it does will it ever stop?(b) Open the switch after a few moments describe what the two measuring devices connected in parallel will be displaying use diagrams if necessary) will the output data change over time and if it does will it ever stop?
Question Diagram
Physics Current Electricity Level: University
Find the magnitude and direction of the current through R1 and R2 in the circuit assuming each battery has an internal resistance of 1.2 ohms.
(b) What is the voltage drop across R1?
(c) What is the power dissipated in R2?
Question Diagram
Physics Electrostatics Level: University
CapacitorA parallel plate capacitor is constructed with circular plates of radius 0.750 cm and plate separation 0.0500 mm. If the capacitor is connected across a 37.2V source find.
(a) The capacitance.
(b) The surface charge in each plate.
(c) The energy stored in the capacitor.
(d) The electric field between plates.
(e) If a slab of plastic with dielectric constant K = 3.6 is inserted between the plates of the capacitor What will the capacitance be?
Physics Waves And Oscillations Level: University
Closed PipeWhat is the length of the tube of a simple wind instrument closed at one end whos fundamental is also 400Hz if the speed of sound is 343 m/s in air?
(b) What is the frequency of the first overtone of each instrument?
Physics Waves And Oscillations Level: University
Speed of wave in stringA string of a violin is 32 cm long between fixed points with a fundamental frequency of 440 Hz and a linear density of . 00061 kg/m.
(a) What is the wave speed
(b) What is the tension in the string?
Physics Current Electricity Level: University
OHM S LawA lightning bolt contains approximatly 10,000 V of electricity. The resistance of the human body to DC current is approximatly 1786 OHM S. What is the current flowing through your body if hit by lightning?
Physics Current Electricity Level: University
Current powerA Christmas light set consist of 40 identical bulbs in series across a 120V line. If the total power used is 140 W what is the resistance of each bulb?
Physics Electrostatics Level: University
Coulombs LawThree charges lie along the x-axis. The positive charge q1 = 15 uC is at x = 2M and a positive charge q2 = 6 uC is at the origin. Where must a negative charge q3 be placed on the x-axis so that the resultant force will be 0? (Answer 0.78m)
Physics Electrostatics Level: University
Coulombs LawThree equal charges of +6 uC are spaced along a line. The end charges are 2 m from the central charge. What are the magnitude and direction of the force on each charge.
Physics Heat & Thermodynamics Level: University
HeatA Carnot engine takes in 100 J at 100 degrees C. At the end of the cycle 50 J are exhausted. What is the temperature of the exhaust.
Physics Heat & Thermodynamics Level: University
HeatA Carnot engine operating at 30 percent efficiency exhausts heat into a heat sink at 283 C. By how much would the temperature of the heat reservoir need to be raised to increase the engine efficiency to 45 percent .
