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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.
four identical particles each having charge q and mass m are released from rest at the vertices of a square of side l.
A uniform 20.0 kg chain 2.00 m long supports a 55.0 kg chandelier in a large public building. Find the tension in the bottom link of the chain
A circuit consists of a 9.0-V battery connected to three resistors (37 ?, 17 ?, and 150 ?) in series. Find the current that flows through the battery
Two boats start together and race across a 46 km wide lake and back. Boat A goes across at 44 km/h and returns at 48 km/h. Boat B goes across at 27 km/h, and its crew, realizing how far behind it is getting, returns at 69 km/h. Turnaround times are n..
An electron collides elastically with a hydrogen atom that is initially at rest. Assume all the motion occurs along a straight line. What fraction of the electron's initial kinetic energy is transferred to the atom? (Take the mass of the hydrogen ato..
A 2.0-kg block is attached to a spring with a spring constant of 24N/m. If the spring is stretched 10 cm from its equilibrium position and released from rest, the maxium velocity attained by the mass is?
Consider a relativistic particle of mass m and kinetic energy T. Derive an expression for the particle's speed u in terms of T and m. Find the percent discrepancy for each case
An electrical load operates at 240 V rms. The load absorbs an average power of 8 kW at a lagging power factor of 0.8. Calculate the complex power of the load
a skier is accelerating down a 30.0deg hill at 4.00 ms2 .a what is the vertical component of her acceleration?b how
A proton moving eastward with a velocity of 5.0 x 103m/s enters a magnetic field of .20 T pointingnorthward. What is the magnitude and direction of the force that acts on the proton?
The eyepiece of a microscope has a focal length of 1.25 cm and the objective lens focal length is 1.26 cm. If the tube length is 17.0 cm, what is the angular magnification of the microscope
We wish to design an ac generator using an armature on which is wound a flat tight rectangular coil (8.00 cm x 20.0 cm) of 150 turns. Determine what angular speed should the coil turn
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