Physics Units Level: Misc Level
The federal deficit in 1992 was 376 billion dollars.Assume each person in the U. S.has a piggy bank filled with nickels, and that each of us wants to contribute our nickels to help pay off the deficit.If the U S population in 1992 was 255 milion. How many nickels would each person contribute? Show setup with units and use exponents in your calculations and answer.
Chemistry Mole Concept Level: Misc Level
Assume that there are 6.02 *10 to the power of 23 atoms of aluminum in 27.0 grams of Al metal.One empty aluminum can weighs 13.8 grams. If you have two dozen empty Al cans, how many atoms of Al would you have?Show setup with units.
Physics Heat & Thermodynamics Level: Misc Level
A pound of fat contains 3500 Calorie of energy. Jogging burns off 150 Calorie per mile. How far in miles, would you have to jog to burn off 6.00 pounds of fat?Show units in calculations.
Physics Ray Optics Level: Misc Level
How could you distinguish experimentally between unpolarized light and circularly polarized light?
Physics Ray Optics Level: Misc Level
Beyond what distance will it be no longer possible to resolve the headlights of a car, 1.1 meters apart, when these are viewed through a telescope of aperture 3 cm?
Physics Ray Optics Level: Misc Level
Find the ratio of the focal lengths of a glass lens in water and in air, the refractive indices of the glass and water being 1.5 and 1.33, respectively.
Physics Ray Optics Level: Misc Level
What is the speed of light in a clear plastic material whose refractive index is 1.4 ?
Physics Heat & Thermodynamics Level: Misc Level
Calculate the work done by a gas in expanding isothermally from a volume of 1 liter at a pressure of 5 atm to 2 liters.
Physics Kinetic Theory Of Gases Level: Misc Level
Calculate the total translational kinetic energy of a molecule of gas at 20 degrees C.
Physics Heat & Thermodynamics Level: Misc Level
How many calories of heeded to convert 40 g of ice at a^ C=, 20 C to steam at 200 C at atmospheric pressure.
Physics Waves And Oscillations Level: Misc Level
Find the speed of waves on a string that is under a tension of 150 N.The string has a mass of 0.20 g per meter length.
Physics Waves And Oscillations Level: Misc Level
A metal rod 70 cm long is clamped firmly at one end. When stroked lengthwise, it gives off a 1400 Hz tone. Find the speed of compressional waves (sound) in the metal.
Physics Waves And Oscillations Level: Misc Level
A device is used to measure the speed of sound in air. By raising and lowering a metal can with a rubber tube attached to the bottom the water level in a tube mounted next to the movable can can be changed. Using a 2500 Hz tuning fork, resonances are found at two values for L ( which is the distance from the top of the tube to the top of the water level in the tube ) separated by 6.7 cm. No resonances exist for water levels in between. What is the speed of sound in air according to these results?
Physics Waves And Oscillations Level: Misc Level
A spring is 3.0 m long and it vibrates in three segments to a frequency of 200 Hz. What is its wavelength? b) fundamental resonance frequency and the speed of the waves on the spring?
Physics Waves And Oscillations Level: Misc Level
A heavy weight hangs at the end of a 140- m cable. A worker at the top of the cable notices that when he strikes the top of the cable sideways,the pulse hits the weight after a time of 4.0 seconds. a) With about what frequency must he vibrate the top end if the cable is to resonate in its fundamental? b) in its first overtone?
