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A simple pendulum with a period T = 2.00 s is attached to the ceiling of an elevator which is initially at rest, Calculate the period of oscillations when the elevator accelerates downwards
A rocket, initially at rest on the ground, accelerates straight upward from rest with constant acceleration 49.0m/s2, Find the maximum height ymax reached by the rocket
A 460-Hz tuning fork causes resonance in the tube depicted in the figure below when the length L of the air column above the water is 18.3 and 55.8 cm, Find the speed of sound in air
A 10 g bullet traveling at 430m/s strikes a 13kg , 1.1-m-wide door at the edge opposite the hinge, What is the angular velocity of the door just after impac
A 130 lb subject did 33 lifts/min up a 30 cm step for 5 minutes, what was the work rate, power output and what was the total work done
A small, plastic sphere of mass m = 111 g is attached to a string There is an electric field of 122 N/C directed along the + x axis
calcualte the pH at one-half the equivalence pont and at the equivalence point for a titration of 50 mL of 0.100M acetic acid with 0.100M NaOH
what is the equilibrium pressures for each of the gases if the initial partial pressures are PHF = .500 atm, PH2=1.00x10^-3 atm, and PF2=4.00x10^-3 atm
Write a mechanism for the reaction of an alkyl halide with alcoholic silver nitrate which depicts the type of substitution which occurs. Explain how this mechanism accounts for the relative rate of
A student's car stalls right in front of a speed bump while she is on her way to physics class, If is 12.7°, what is the size of the force pulling the car in lbs
The largest estimate for the amount of water on the moon is currently 1000parts per million (i.e 1000g water per 1000000g of salt). if the moon is made primarily of a pyroxene mineral with formula F
A student is conductiong this experiment, but forgets to temper the lid. therefore it breaks while the hydrate is being heated. the student thinks carefully and replaces the old lid with a new one,
A bicycle break pad is pushed against the moving rim of the wheel with a force of 80 N and the dynamic coefficient of friction is 2.2, What is the shear modulus of the rubber that the pad is made fro
Explain how the calculated formula of the hydrate would be changed if water from the air is absorbed by the hot dry sample as it cools.
In the electrolysis of KI, NaBr, pure elemental iodine potassium, and soduim cannot be isolated. Discuss by using equation I2(s) I^-(ag)>I3^-(ag) Iodine equation
A particle of charge +15 µC and mass 2.00 10-5 kg is released from rest in a region where there is a constant electric field of +280 N/C
Water has a mass per mole of 18.0 g/mol, and each water molecule (H2O) has 10 electrons, How many electrons are there in 1.79 liters of water
Calculate the standard free energy change and the equilibrium constant for the following reaction at 25°C: (all aqueous solutions are 1 M) Au(s) + Ca2+ (aq) ? Au3+(aq) + Ca(s)
An undamped 1.42-kg horizontal spring oscillator has a spring constant of 29.9 N/m. While oscillating, it is found to have a speed of 2.53 m/s as it passes through its equilibrium positio
Using terms in the Hartree-Fock energy expression, explain why the lowest-energy triplet state of the He atom is higher in energy than the singlet state.
What wavelength is expected for light composed of photons produced by an n=3 to n=1 transition in a hydrogen?
Calculate the concentration of each reactant in trials 1 through 5 after the flasks contents have been combined but before the reaction takes place.
A driving force of the form F(t)=(0.237 N) sin(2pi*f*t) acts on a weakly damped spring oscillator with mass 5.72 kg, Find the amplitude of the oscillator's steady-state motion when the driving force h
what is the pH of a solution made by adding 5.42grams of potassium nitrite, to 727mL of .178 M nitrous acid(assume no change in volume takes place) and what is the pH of the solution after adding 49