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A 100 W point source radiates yellowish-green light of wavelength 555 nm uniformly in all directions. how far from the source could the light be detected
Rank the following ionic compounds in order of increasing attraction between their ions: BaO, BaCl2, and CaO.
The student starts with 0.97 moles of benzoic acid and 7.8 moles of methanol. At the end of the experiment 0.9 moles of methyl benzoate are isolated
Jonathan is riding a bicycle and encounters a hill of height h. At the base of the hill, he is traveling at a speed vi. What is the change in potential energy stored in Jonathan's body
Phosphorous pentachloride forms from phosphorus trichloride and chlorine: PCl3(g)+Cl2(g)->PCl5(g) given: ?Ssys=-170.2J/K, ?Ssurr=295.0J/K, ?Stotal=124.8J/K, reaction is spontaneous under standar
a copper puece of mass 140g and of temperature 240 degree is placed into 360g of water at temperature 25 degree. Find the final equilibruim temperature
The possible compounds are listed below. Two methods of positive identification are required for each compound. Benzoic acid benzoin 1,4-dibromobenzene flourene o-Toluic Acid 4-aminoacetophenone
A hammer slides down a roof of angle theta (respect to ground). It slides along the roof distance D. Find how far from the base of the building the hammer lands
A 304 turn solenoid has a radius of 5.00 cm and a length of 20.0 cm, Find the inductance of the solenoid
A technician wraps wire around a tube of length 33 cm having a diameter of 8.1 cm. what is the self-induced emf in the solenoid
A technician wearing a circular metal band on his wrist moves his hand into a uniform magnetic field of magnitude 2.2 T in a time of 0.48 s. find the magnitude of the average emf induced in the band
Transcranial magnetic stimulation (TMS) is a noninvasive technique used to stimulate regions of the human brain. Determine the induced emf within a circle of tissue of radius 1.2 mm
Heart pacemakers are often powered by lithium-silver chromate "button" batteries. The overall cell reaction is: 2 Li(s) + Ag2CrO4(s) ? Li2CrO4(s) + 2 Ag(s) The overall cell potential is 3.5V. What i
Consider the reaction A? B Assuming ?G?f (A) = 8.066 kJ/mol and ?G?f (B)= 12.24 kJ/mol, what is the equilibrium constant for this reaction at 25 oC
A light bulb is wired in series with a 122-? resistor, and they are connected across a 120.0-V source. What is the resistance of the light bulb
A weak acid HA (pKa = 5.00) was titrated with 1.00 M KOH. The acid solution had a volume of 100.0 mL and a molarity of 0.100 M. Find the pH at the following volumes of base added and make a graph of
A current of 1mA is passed through a slab of semiconductor material of thickness 1mm with a magnetic field of 0.1 T applied in the perpendicular direction. Estimate the band gap energy for the mater
Tritium (symbol T) is produced in the upper atmosphere by neutron cosmic rays primarily through the 14N(n,T)12C and 16O(n,T)14N reactions.
A vertical straight wire carrying a 9.0 A current exerts an attractive force per unit length of 7.0X10^-4 N/m on a second parallel wire 8.0 cm away
Explain, mechanistically, why the observed result of the bromination of trans-stilbene is anti addition of bromine, as opposed to syn addition
The ferromagnet gadolinium has a Curie temperature of 298 K and each atom has J=7/2 and g=2. Find the value of the molecular field at low temperatures
An electrically neutral model airplane is flying in a horizontal circle on a 4.0-m guideline, which is nearly parallel to the ground. Find the magnitude of the charges
Balance the following equation in basic conditions. Phases are optional. SO3 2- + Co(OH)2 yields Co + SO4 2-
Assume the mostly infrared radiation from a heat lamp acts like a continuous wave with wavelength 1.50 µm. Find the peak magnetic field strength