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X rays of wavelength 2.63 Ao were used to analyze acrystal. the angle of first order diffraction (n=1 in the bragg eq)was 15.55 degrees.
He finds that the acceleration due to gravity is constant at 0.8 m/s2.
The mole fraction of an aqueous solution of titanium(IV) iodite is0.328. Calculate the molarity of the titanium(IV) iodite solution,if the density of the solution is 1.15 g mL-1.
The space shuttle is the most complex machine ever built and the first orbital spacecraft designed for partial reusability. It has a mass of 2,209,203 kg and is capable of taking up to 11 astronaunt
Carbon diselenide (CSe2) is a liquid at roomtemperature. The normal boiling point is 125oC, and themelting point is -45.5oC. Carbon disulfide(CS2) is also a liquid at room temperature with normalboili
An observer in S' moving along x axis at speed v relative to S also observes two flashes, but the blue flash occurs 6μs before the red. What is the magnitude and direction of v?
A 70 kg. skydiver reaches a teminal velocity of 50 m/s. At what rate is the drag force dissipating his kinetic energy? How does this rate compare with his rate of change in potential energy?
Two source points S1 and S2 are emitting waves with wavelength .5m they are 1.75m apart. If a sound detector was to circle around the midpoint of the two sources, how many points are exactly in phas
A deep-sea diver uses a gas cylinder with a volume of 10.0L and acontent of 51.2 g of O2 and 32.6 g of He. Calculate the partial pressure of each gas and the total pressure if the temperature of the
a) Find the speed of the rock when it reaches the lowest point of its trajectory? b) What is the maximum tension in the string?
Draw lewis and line bond structures for formaldimine,CH2NH. How many electrons are shared in thecarbon-nitrogen bond? What is the hybridization of thenitrogine atom?
A roller coaster car starts with a speed of 12 m/s at point A (30 meters above the horizontal surface), travels down a hill and levels out at point B (15 meters above the horizonta surface), then tr
An electron in a hydrogen atom in the n = 6 energy level emits 109.4 kJ/ mol of energy in a transition to a lower energy level. To what energy level does the electron fall?
Muscles are attached to bones by elastic bundles called tendons. For small stretches, tendons can be modeled as springs obeying Hooke's law. Experiments on the Achilles tendon found that it stretche
A certain reaction has the following general reactionaA=bBAt a particular temperature and [A]0=2.00x10^-2 M,concentration versus time data were collected for this reaction,and a plot of ln[A] versus
An object of mass 10.0 kg is initially at rest. A 100 N force causes it to move horizontally through a distance of 6.00 m. What is the change in the kinetic energy of this object?
The liquid-drop model of the nucleus suggests that high-energy oscillations of certain nuclei can split ("fission") a large nucleus into two unequal fragments plus a few neutrons.
Calculate the frequency of the electromagnetic waves produced whenthe electrons in a mole of hydrogen atoms change from the fifth tothe second energy level.
Given the most common mineral in limestone is calcium carbonate, illustrate how thes limestone objects are corroded by sulfuric acid in polluted air.
The tension in the rope is 40 N, and the coeffient of friction between the block and the surface is mu k = 0.25. a). If the block travels a distance of 4.5 m. along the surface, what is the work done
When 2-methylpropene is bubbled into dilute sulfuric acid at room temperature, it appears to dissolve. What new substance has been formed?
In an experiment, an inclined plane is set up. A 200 g mass is placed on a car, and the car is placed at the bottom of the inclined plane. The object is to find the correct hanging weight that will
The radius of gold is 144 pm, and the density is 19.32 g/ml. Does elemental gold have a face-centered cubic structure or a body centered cubic structure? Show all work please.
An electron moves in a circular path perpendicular to a uniform magnetic field with a magnitude of 2.12 mT. If the speed of the electron is 1.51 x 107 m/s, determine the following. The time interval
In normal blood, there are about 5.4 x 109 redblood cells per milliliter. The volume of a red blood cell is about90 x 10-12 cm3, and its density is 1.096g/mL. How many liters of whole blood would b