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Glucose is present in bacterial cells at a concentration ofabout 1 mM. What is the concentration of glucose expressed asmg/mL? How many molecules of glucose are contained in a typical E.coli cell (a
A meter stick is held vertically with one end on the floor and is then allowed to fall. Find the speed of the other end when it hits the floor, assuming that the end on the floor does not slip. (Hin
A sample of a compound contains 0.90 g of element A and 0.60 g ofelement B. If the atomic weight of A is 60 g/mole and that of B is40 g/mole, then what is the empirical formula for this compound?
Use 344 for the speed of sound in air and assume that the source and listener are both far enough from the doorway for Fraunhofer diffraction to apply. You can ignore effects of reflections.
A 90-nm-thick coating is applied to the lens. What must be the coating's index of refraction to be most effective at 480 ? Assume that the coating's index of refraction is less than that of the lens
What is the minimum coating thickness that will minimize the reflection at the wavelength of 704 where solar cells are most efficient? Solar cells are given antireflection coatings to maximize their
A lithium salt used in lubricating grease has the formula LiCnH2n+1O2. The salt is solublein water to the extent of 0.036g per 100.0g of water at 25C. The osmotic pressure of the solution is found t
Looking straight downward into a rain puddle whose surface is covered with a thin film of gasoline, you notice a swirling pattern of colors caused by interference inside the gasoline film.
Copper is sometimes coated on the bottom surface of cooking pans. Copper has a specific heat of 0.385 J/g 0C. A25.0-g sample of copper heated to 85.0 0C is dropped into water at an initial temperatu
A block is on a horizontal surface (a shake table) that is moving back and forth horizontally with simple harmonic motion of frequency 1.28 Hz. The coefficient of static friction between block and s
Suppose the insulating qualities of the wall of a house come mainly from a 4.0 inch layer of brick and an R-19 layer of insulation. What is the total rate of heat loss through such a wall, if its to
A 150.0-g sample of metal at 80.0°C is added to 150.0 g of H2O at 20.0°C. The temperature rises to23.3°C. Assuming that the calorimeter is a perfect insulator,what is the specific heat o
Determine the density of an unknown liquid if the exact mass of 10.00 ml of this unknown at 25 0C is equal to 8.2148 g. (Report theanswer with the appropriate number of significant figures)
A 15-μF capacitor and a 30-μF capacitor are connected in series, and charged to a potential difference of 50 V. What is the resulting charge on the 30-μF capacitor?
Consider two separate 1 litre vessels connected via a small tap which is initially closed. The first vessel contains 0.2 mole ofNH3 and the second vessel contains 0.4 mole ofCH4.
The coefficient of static friction between block and surface is 0.662. How great can the amplitude of the SHM be if the block is not to slip along the surface?
You are given a cube of silver metal that measures1.012 cm on each edge. The density of silver is 10.5 g/cm3. The cube is composed of6.08x1022 silver atoms. Because atoms arespherical, they cannot
Assuming that a cube has a volume of3.7x10-19cm3, calculate the length of each edge of the cube. Enter a number with the correct number of significant figures.
Would the rank be from the inner most surface to outer because of the density of the field lines relating to magnitude?
To recrystallize a solid, the solvent used must dissolve very little solid when cold and a lot of solid when hot. Explain why thesolid should dissolve very little when the solvent is cold.
The notes are all of fundamental frequencies. To play a note of frequency 575 Hz, how far down the string must one place a finger?
When 35.6 L of ammonia and40.5 L of oxygen gas at STP burn nitrogen monoxide and water is produced. After the reaction return to STP how many grams of nitrogen monoxide is present.
A ground state H-atom absorbs a photon of wavelength 84.10 nm, andits electron attains a higher energy level. The atom then emits two photons: one of wavelength 3221 nm to reach an intermediate leve
The precipitate was separated from the supernatant liquidin (1) and was found to be insoluble in hot water. The precipitateturned grey-black upon addition of 6M NH3.