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A parallel-plate capacitor with a plate area of 8.0 x 10^-2 m^2 and a plate separation of 1.0 x 10^-4 m is filled with polyethylene. If the potential difference between the plates is 2.0 x 10^4 V, w
Commercial platinum resistance thermometers are often manufactured with a resistance of 100.0 Ω at 0.0 degrees Celsius. The temperature coefficient of resistivity is 3.9 x 10^-3/degree Celsius
The electromagnet of a bell is constructed by winding copper wire around a cylindrical core, like thread on a spool. The diameter of the copper wire is 0.45 mm, the number of turns in the winding is
You need to load 10 μg of protein in 10 μL per well of agel. This needs to be in 1X buffer and in a total volumeof 100 μL. You are given a 25 μg/μL solution ofa protein, a 10X sample
A conducting wire of length 2.0 m is connected between the terminals of a 12-V battery. The resistance of the wire is 3.0 Ω. What is the electric current in the wire? What is the electric fiel
A soulution is 0.0010M in each cations, Ag+,Hg2+2, and Pb+2. The Ksp valuesfor AgCl,Hg2Cl, and PbCl2 are1.8x10-10, 1.2x10-18, and1.7x10-5. Calculate the concentration of Cl-needed to begin the pr
35 mg of benzoic acid is dissolved in 10 ml of water. this aqueous solution is then extracted with 5 ml of dichloromethane. it is determined that the water layer now only contains 4 mg of benzoic ac
The electric current in the lightbulb of a flashlight is 0.50 A. How much electric charge flows through the lightbulb in one hour? How many electrons pass through the lightbulb.
A point charge, q, of magnitude 1x10^-6 Coul, is place a distance a = 10cm from a neutral conducting sphere of raduis R = 5cm. a. What is the net force on the point charge?
A solution is made by replacing solid calcium flouride into pure water. The calcium ion concentration in this solution was found to be 1.1x10^-6 M, what would the numerical value for Ksp be for cal
If there is an 7.0 km/h ocean current running in a direction 20 N of E, what is the velocity of the ship with respect to the land?
A Styrofoam cup holding 98 g of hot water at 1.00 x 102°C cools to room temperature, 19.7°C. What is the change in entropy of the room? (Neglect the specific heat of the cup and any change i
Calculate the Ki for a competitive in hibitor whose concentration is 4 x10-4 M that raises the Km of the substrate by 25%.
The moon orbits the earth at a distance of 3.8X10^8 m. Assume that this distance is between the centers of the earth and the moon and that the mass of the earth is 5.98X10^24 kg. Find the period for
Radium-226 decays by alpha emission to radon-222. suppose that 25.0% of the energy given off by one gram of radium is converted to electrical energy.
Two identical blocks are stacked one on top of the other. The bottom block is free to slide on a frictionless surface. The coefficient of static friction between the blocks is 0.35. What is the maxi
What must be the molecular mass of a gas if its molecules are tohave a root-mean-square speed at 25oC equal to that of the M-16 rifle bullet (2180 mi/h)?
If you reduced a pure sample of R-benzoin with sodiumborohydride, you will form hydrobenzoin. How many stereoisomers would you form from the reaction above? Why?
If you took an IR of the starting material for benzoin condensation and an IR of the benzoin formed in the reaction, what peak do you expect to see disappear from starting material to product?
An electron has a velocity of 1.81×104 m/s (in the positive x direction) and an acceleration of 2.11×1012 m/s2 (in the positive z direction) in uniform electric and magnetic feilds. If th
(a) How long does it take the boat to reach the buoy? (b) What is the velocity of the boat when it reaches the buoy?
1) A travelling wave train has a wavelength 0.5m, speed 20m/s. Find the wave frequency.
Suppose two 200.0 L tanks are to be filled seperately with the gases Helium and Hydrogen. What mass of each gas is needed to produce a pressure of 135atm in it's respective tank at the temperature 2
A 0.14 kg pinecone falls 17m to the ground, where it lands with a speed of 12 m/s. a) How much work was done on the pinecone by air resistance? Use two significant figures.
Magnesium metal reacts with HCL to produce hydrogen gas according to the equation:Mg + 2HCL yields MgCl2 + H2 . If2.15g of Mg reacts completely, what volume of hydrogen can be produced at ST