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A playground Merry-Go-Round has a mass of 291 kg which can be viewed as being uniformly distributed over a disk of radius 2.4 m. What is the new rotation rate assuming the child remains at the rim
Calculate the pH during the titration of 10.00 mL of 0.400 M hypochlorous acid with 0.500 M NaOH. First what is the initial pH (before any NaOH is added). The Ka for HOCl is 3.0 x 10-8 M. 2.What is
Block A has a mass of 2 kg and rests on a smooth table. What is the acceleration in m/s2 of the two blocks
To get up on the roof, a person (mass 70.0 kg) places a 6.00-m aluminum ladder (mass 10.0 kg) against the house on a concrete pad with the base of the ladder 2.00 m from the house. calculate the mag
Calculate the entropy change for the system and the surroundings. The heat of fusion of water is 6.02 kJ/mol; Cp (water)=4.184 J/K/g, Cp(ice)=2.094 J/K/g.
Explain how the rate of the forward reaction compares to the rate of the reverse reaction at equilibrium
An aluminum rod is 17.0 cm long at 20°C and has a mass of 350 g. what is the change in length of the rod
Calculate the individual concentrations of C and of D in the following unknown mixture: Compound C: Absorbance at 365nm = 0.150 Absorbance at 470nm
One mole of an ideal gas (Cv=3/2R) is heated at (a)constant pressure and (b) constant volume from 298Kto 353K. Calculate delta_S for both cases.
A researcher uses a converging lens with focal length 310 mm to view a specimen. The lens is placed 130 cm from the specimen. Where will the image be located
One mole of N2, one mole of O2, and 0.5 mol of H2 are at 25 oC and 1 atm. The final total pressure of the mixture is 1 atm. Calculate delta_S on forming the mixture.
A string with a mass m = 5.00 g and a length L = 9.00 m has one end attached to a wall; the other end is draped over a small, what is the fundamental frequency of its vibration
An object rotates about a fixed axis, and the angular position of a reference line on the object is given by ? = 0.60e8t, what are the magnitudes of the point's
how much work can be done by the engine as it operates through one cycle, how much heat is given off during the isothermal compression, what is the entropy change (for the gas) during the isothermal
a sphere of radius a in free space is nonuniformly charged over its surface such that the charge density, Compute the total charge of the sphere
Consider a collection of 4 "Fermi" dice. That is, no two die may have the same face up. What is the average value of the sum of the dice
A 3.40-kg aluminum ball has an apparent mass of 2.10 kg when submerged in a particular liquid. Calculate the density of the fluid
Compute the voltage between the surface and the axis of a uniformly charged infinite cylinder of radius a
A charge of density p is distributed uniformly along an arc representing a half of a cirle of radius r. Determine the electric field intensity vector at an arbitrary point
A cube of edge length a in free sapace is charged over its volume with a charge density p(x)=p0 *sin(pi*x/a), Compute the total charge of the cube
Light from a star has an intensity of about 57×10-8W/m2. how far away is it from Earth
A reflecting telescope has a main mirror with fM = 620 mm. If an eyepiece with a magnification of 15 is used, what is the total magnification of the telescope
Why has fluorine been added? The structure is Cephalosporin.
Find delta heat formation of butane. C4H10 + 13/2 O2 ---> 4 CO2 + 5 H2O. Delta H comb= -2881.9 Delta Heat formation of CO2 = -393.5kJ/mol Delta Heat formation of H2O = -241.8kJ/mol What is the kJ
Calculate the total number of repayments Jonathon has to make to his brother and calculate the total amount Jonathon has to repay to his brother.