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Which of the following is not true of all electromagnetic waves, only one answer is correct,
A. The electric and magnetic fields must be perpendicular to each other.B. the wave is a trasverse wave.C. Only wavelengths of 400 to 700 nm are allowed.D. In Vacuum, the speed of the wave is given by c. the speed of light.
The Bunker Hill Monument is a 67 m tall granite obelisk that contains 294 steps. If it takes a 735N person 15 minutes to climb to the top, calculate the power of this person
A ship is floating on a lake. Its hold is the interior space beneath its deck; the hold is empty and is open to the atmosphere. What volume of water per second leaks into the ship
A box of books is initially at rest a distance D = 0.515 m from the end of a wooden board. Find the speed of the box as it reaches the end of the board
Water flows straight down from an open faucet. The cross-sectional area of the faucet is 2.2 × 10-4m2, find the cross-sectional area of the water stream at a point 0.11 m below the faucet
The sun can be considered an ideal blackbody radiator at a temperature of 5900K, What is the peak wavelength of the distribution
A 30 g steel ball bounces elastically on a steel plate, always returning to the same maximum height h = 14.2 m. What is the time interval between bounces
Photorefractive keratectomy (PRK) is a laser-based surgery process that corrects near- and farsightedness by removing part of the lens of the eye to change its curvature and hence focal length. What is the energy of a single photon
You exert a force of 21 N on the head of a thumbtack. The head of the thumbtack has a radius of 5 mm. What is the pressure on your thumb
A helium atom (mass of helium atom = 6.646 x 10-27 kg), initially at rest, emits a photon of energy 40.8 eV. What is the speed of the Helium atom after releasing this photon
A positron (q = +e) moves at 4.6 107 m/s in a magnetic field of magnitude 0.50 T. The magnetic force on the positron has magnitude 1.5 10-12 N. What is the angle between the velocity and the field
reviews the concepts that are important to this problem. A light bulb is wired in series with a 119-? resistor, What is the resistance of the light bulb
The speed of sound in air at 0 degrees C is 331 m/s. If the density of air is 1.29 kg/m^3, then what is the bulk modulus of air
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