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A mole of hydrogen gas was found to have an average De Broglie's wavelength of 1A (10^-10m), the approximate length of the H-H bond. What temperature is the gas kept at?
Provide an expression for the relative probability of finding a population of particles in the box in the second excited state relative to the ground state at 10000K
A small sphere with a charge of -5.8 multiplied by 10-7 C is placed in a uniform electric field of magnitude 1.7 multiplied by 106 N/C pointing to the west. What is the magnitude and direction of the
A guitar string has a tension T, length L, and diameter D. Give the multiplicative factor by which the fundamental frequency of the string changes under the following conditions: (a) The tension in
A certain diatomic molecule vibrates with a characteristic frequency v= 2.45x10^9s^-1 (these are microwaves). Calculate the relative population of the ground state and first excited state at 1K.
If the concentration of RNA in a solution is 0.01mg/mL, calculate its absorbance at 260nm. Assume a path length of 1 cm and each base to have an average molecular weight of 330.
A hammer thrower accelerates the hammer (mass = 7.30 kg) from rest within four full turns (revolutions) and releases it at a speed of 28.0 m/s. Assuming a uniform rate of increase in angular velocit
In a Mossbauer effect experiment, the change in frequency of a 3.5 x 10^18 Hz electromagnetic wave can be detected if the source and absorber have a relative speed of 0.03 mm/s with respect to each
In water, without the enzyme, the reaction proceeds with a rate constant of 0.039s^-1 at 26C. In the presence of the enzyme in water, the reaction proceeds with a rate constant of 1.0 x 10^6 s^-1 at
King Arthur's knights fire a cannon from the top of the castle wall. The cannonball is fired at a speed of 52 m/s and at an angle of 34°. A second cannonball that was accidentally dropped hits
Hydraulic engineers in the United States often use, as a units of volume of water, the acre-foot, defined as the volume of water that will cover 1 acre (where 1 acre = 43560 ft2) of land to a depth
Calculate the energy associated with each of the three wavefunctions of lowest energy, in order of increasing energy. Provide an expression for the average distance from the nuclues for the 2s and 2p
A platinum resistance thermometer has resistances of 220.0 when placed in a 0°C ice bath and 262.8 when immersed in a crucible containing a melting substance. What is the melting point of this s
An explorer is caught in a whiteout (in which the snowfall is so thick that the ground cannot be distinguished from the sky) while returning to base camp.
The near point for your myopic uncle is 10 cm. Your own vision is normal; that is, your near point is 25 cm. Suppose you and your uncle hold dimes (which are 1.7 cm in diameter) at your respective
An object has a weight of 0.874 N. It is suspended from a scale, which reads 0.704 N when the piece is submerged in water. What are the volume and density of the piece of metal?
A mixture of He,Ar, Xe and has a total pressure of 2.60 atm. The partial pressure of He is 0.350 atm, and the partial pressure of Ar is 0.200 atm. What is the partial pressure of Xe?
Calculate the mass of the counterweight. Assume that Peter starts from rest. Calculate the tension in the line supporting the actor.
In standardizing a solution, what would happen if instead of putting HCl solution into a buret and standardized NaOH solution into a beaker when performing a titration?
A Steel guitar string has a Tension, T, a length, L, and a diameter, D. Give the multiplicative factor by which the fundamental frequency of the string changes under the following conditions:
What Celsius temperature,T2 , is required to change the volume of the gas sample in Part A ( T1= 35 degrees celsius, V1= 1120 L) to a volume of 2240 L?
A charge of -2.355 µC is located at (3.055 m, 4.501 m), and a charge of 1.800 µC is located at (-2.372 m, 0). (a) Find the electric potential at the origin.
A 10.0 L gas cylinder has been filled with 7.40 moles of gas. You measure the pressure to be 3.90 atm. What is the temperature inside the tank?
A balloon is floating around outside your window. The temperature outside is 15 degrees celsius, and the air pressure is 0.700 atm. Your neighbor, who released the balloon, tells you that he filled
Imagine that you have an ideal gas in a 8.90 L container, and that 1550 molecules of this gas collide with a square-inch area of the container at any given instant.