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The distance x traveled by a motorboat in t seconds after the engine is cut off is given by x=k-1ln (kv0t+1), where v0 is the velocity of the boat at the time the engine is cut and k is constant.
Diamonds have successfully been prepared by submitting graphite tohigh pressure. Calculate the approximate minimum pressure needed using ΔfG=0 for graphite andΔfG=2.90 x 103 J/mol fo
Write an equation that using the variable t to represent the time it takes to paint the room together that can be used to solve the problem.
To reach the equivalence point of a titration, 32.75 ml of 0.350M HCl was added to 25.0 ml of an NH3 solution of unknown concentration. what is the pH of at the equivalence point?what is the pH at t
Calculate the hydronium and hydroxide ion concentrations in the solution. Then calculate the mass of magnesim hydroxide needed to make 250ml of the solution.
Measured on the Richter scale, the magnitude of an earthquake of density I is defined as R = log (I/I0) where I0 is a minimum level for comparison. What is the Richter scale reading for an earthqua
A study of urban density shows that the population density A (in persons/mi2) is related to the distance s (in mi) from the city center by logeA=logep-vs+ns3.
Non-relativistic protons accelerated by a potential difference U form a round beam with current I. Find the magnitude and direction of the Poynting vector outside the beam at a distance r from its a
Suppose you have 20.81 g of water,initially at 25.00 oC, in a perfectly insulated container. You then add water which is at 83.71 oC tothe container until the combined sample of water has a
Estimate the amount of water this cyclist must evaporate per hour (through sweat) to get rid of excess body heat she produces. Assume a skin emissivity of .70
A ball is thrown horizontally off of a 40-meter high cliff. It lands in the water 30 meters beyond the edge of the cliff. Find the speed with which the ball was thrown.
A solution of sodium iodide containing iodine-131 was given to apatient to test for malfunctioning of the thyroid gland. What fraction of the iodine-131 nuclei would remain undecayed after9.0 d?
Is it possible for there to be more than one solution for a triangle if you know two angles and one side length? What if you know two side lengths and an angle?
Suppose an electron is released from rest in a uniform electric field whose strength is 5.90 x 103 V/m. (a) Through what potential difference will it have passed after moving 1.00 cm?
Determine two coterminal angle (one positive and one negative) for each angle. Give your answer in radians. Find the complement and supplement of each angle.
The plane is released when it has been displaced 0.50 meter from its equilibrium position by the catapult. What is the approximate energy acquired by the airplane from the catapult during takeoff?
The amount of lactic acid,HC3H5O3, produced in a sample of muscle tissue was analyzed by reaction with hydroxide ion.Hydroxide ion was produced in the sample mixture by electrolysis.
An open box with square base is to have a total of 75ft^2 of tin in it's sides and base. What are the dimensions of the box if it's volume is to the maximized?
A uniform electric field of magnitude 250 V/m is directed in the positive x direction. A positive 12-μC charge moves from the origin to the point (x,y) = (20cm, 50cm). (a) What is the change in the
A simple Atwood's machine uses two masses, m1 and m2. Starting from rest, the speed of the two masses is 3.0 m/s at the end of 10.0 s. At that instant, the kinetic energy of the system is 100 J and
In a town called Steelers-Rile, the population is 15,000. The population is increasing at a rate of 3% per year. What is each town's population after 10 years?
You have to prepare a pH 4.8 buffer, and you have the following 0.10Msolution avaliblie: formic acid , sodium formate, propionic acid, sodium propionate, phosphorice acid and sodium dihydrogen phosp
A series AC circuit contains the following components: a 150 resistor, an inductor of 250 mH, a capacitor of 2.00 , a source with = 210 V operating at 50.0 Hz. Calculate the (a) inductive reactance,
Let f(x)=x 2-2 calculate the average rates of changeof f on the intervals [1,3], [1,2], [1,1.5], and [1,1.1]. Find an expression for the average rate of change of f on the interval [1,1 + h], where h
The small wheel has a radius of 2.4 and accelerates at the rate of 7.1 , and it is in contact with the pottery wheel (radius 20.0 ) without slipping. Find the angular acceleration of the pottery whe