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A drop of water on a countertop reflects light from a flower held 2.4 cm directly above it. The flower's diameter is 1.8 cm, What is the focal length of the water drop
Consider two samples of liquid: one mole of water H2O and one mole of ethanol C2H5OH. The density of water is 1.0 g/mL, and the density of ethanol is 0.785 g/mL. Answer each of the following questio
Fish are hung on a spring scale to determine their mass (most fishermen feel no obligation to report the mass truthfully). How far apart are the half-kilogram marks on the scale
You are at a rock concert, and the sound intensity reaches levels as high as 100 dB. Calculate the amplitude of this oscillating force
The ternary compounds called chlorofluorocarbons, or Freons, have proved to be very valuable as refrigerants and as cleaning agents for circuit boards. Unfortunately, in the atmosphere these compoun
A 10cm -diameter cylinder contains argon gas at 10 atm pressure and a temperature of 60?C . A piston can slide in and out of the cylinder. What is the final length of the cylinder
A compound is known to contain 51.27% carbon and 27.30% oxygen by mass. Each molecule contains two atoms of oxygen. What is the molar mass of this substance
A pendulum clock has an aluminum pendulum exactly 1.0m long when the clock is calibrated perfectly. The temperature increases by 9?C. By how much is it off at the end of one day
How much heat (in ) is evolved in converting 1.00 of steam at 130.0 to ice at -50.0? The heat capacity of steam is 2.01 and of ice is 2.09
A 1.50 mole sample of an ideal gas at 28.5 degrees C expands isothermally from an initial volume of 22.5dm^3 to a final volume of 75.5dm^3
A piece of gold foil has a volume of 0.645cm^3. If the piece of gold measure 10.0 cm by 12.5cm, what is the thickness of the foil
a 20 kg cart that is to be rolled up a 5 meter long 2 meter high ramp. what would be its velocity when it reached the bottom
Two equally charged, 1.00 g spheres are placed with 2.00 cm between their centers. find the magnitude of the charge on each sphere
A 46.0-kg child takes a ride on a Ferris wheel that rotates four times each minute and has a diameter of 20.0 m. What is the centripetal acceleration of the child
An air puck of mass m1 = 0.15 kg is tied to a string and allowed to revolve in a circle of radius R = 1.1 m on a frictionless horizontal table. What is the horizontal force acting on the puck
the absolute portential at the exact center of a square is 3.0v when a charge of +Q is located at one of the squares corners. What is the absolute potential at the squares center
The internal energy of a gas is 1000j. The gas is compressed adiabatically and it's volume deceases by 400cm^3. What is internal energy of gas
A parallel plate capacitor is connected to a battery. The space between the plates is filled with air. Find the electric field inside the dielectric
The technique known as potassium-argon dating is used to date old lava flows and thus any fossilized skeletons found in them, What is the age of a piece of solidified lava with a 40Ar/40K ratio of 0.3
A quarter-pound hamburger with all the fixings has a mass 220g . The food energy of the hamburger is 2.4MJ. What is the energy equivalent of the mass of the hamburger
An unstable particle at rest breaks up into two fragments of unequal mass. The mass of the lighter fragment is equal to 2.80 multiply.gif 10-28 kg, determine the speed of the heavier fragment
6.63 mol of argon gas is admitted to an evacuated 158.85 cm3 container at 48.95oC. compute the final pressure
An aqueous solution is 28.0% by mass ethanol, CH3CH2OH, and has a density of .957 g/mL. What is the molality of ethanol in the solution
An astronaut travels from a distant star to the Earth at speed 0.992c. What is the distance from the star to the Earth as measured by an observer on the Earth