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1. The so-called "hydrogen alpha (Ha) line" is a specific wavelength of red light caused by excited atomic hydrogen. It is frequently used when studying the Sun. The wavelength of Ha is 656.3 nm, or 656.3*10-9 m. The speed of light in vacuum is 3*108 m/s. What is the frequency ( in units of cycles per second, or 1/s) of Ha in vacuum?
2. Light is incident at angle A from a media with n = 1.5 to one with n = 2.0 as shown in the figure. What is the minimum value for A so that there is total internal reflection at point P, which is at the interface between the n = 2 and n = 1 materials?
3. An object of height 5 cm is placed 30 cm in front of spherical concave mirror. If the image is real and 10 cm high, what is the radius of curvature of the mirror?
4. Two lenses are placed on the x-axis. The first lens is a diverging lens with focal length 4cm placed at x = -2cm. The second lens is a converging lens with focal length 7cm placed at x = 8cm. If an object is placed at x = -18cm, what is the position of the image on the x-axis? (Find the answer to the nearest centimeter)
5. In the above problem, which of the following characterizes the final image when compared to the original object?a. Correctly oriented.b. Upside down.c. Backwards (right to left reversal).d. Upside down and backwards.
A series RCL circuit includes a resistance of 298 ohm, an inductive reactance of 649 ohm, and a capacitive reactance of 415 ohm. The current in the circuit is 0.317 A. What is the voltage of the alternator?
question1a football lineman charges an opponent with a force of 175lbs in direction of 310 degrees. the opponent
Two converging lenses are separated by 23.20 cm. The focal length of each lens is 12.20 cm. Determine the final image distance relative to the lens on the right
A parallel-plate capacitor with circular plates is beingcharged. Consider a circular loop centered on teh central axis andlocated between the plates. what is the displacement current between the plates
q1. an airplane is flying horizontally with the speed of 1300kmh while an engine falls off. neglecting air resistance
How many J of energy must be removed when 156 g of steam, at a temperature of 175.0 °C, is cooled and frozen into 156 g of ice at 0 °C.
Find the center of mass of a system composed of three spherical objects with masses of 3.4kg , 2.3kg , and 4.2kg and centers located at (-6.2m , 0), (2.0m , 0), and (2.8m , 0), respectively.
A car is traveling at 25 m/s when the brakes are applied and it comes to rest after 5 s. How far did it travel while the brakes were applied
An object that is launched straight up from the ground reaches maximum height H and falls straight back down to the ground, Express the average speed over the entire trip as a function of H and T
A sound wave moving through water has a frequency of 256Hz and a wavelength of 5.77m.What is the speed of sound in water.
Jet fighter planes are launched from aircraft carriers with the aid of their own engines and a catapult. determine the work done on the jet by the catapult
batted straight back to Lonnie with a return speed of 60 m/s. If the bat is in contact with the ball for .050 s, illustrate what is the impulse experienced by the ball.
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