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A charge +q is located at the origin, while an identical charge is located on the x axis at x = +0.42 m. find Where should the third charge be located
A reaction has a rate constant of 1.27×10^4/s at 29 degrees C and 0.234/s at 79 degrees C. What is the value of the rate constant at 18
A 10.0kg block of ice is sliding due east at 8.00 m/s when it collides elastically with a 6.00kkg block of ice, Determine the velocities of the blocks of ice
An RLC circuit is connected to a 220 V 60 Hz ac voltage source. Determine the power loss in the circuit
If you use 25.0 mL of the 0.24M sodium hydroxide solution to titrate a 0.40 M solution, how many mL of HCl will be used
A 250g , 25-cm-diameter plastic disk is spun on an axle through its center by an electric motor. What torque must the motor supply
A 0.5000-g sample containing NaHCO3, Na2CO3, and H2O was dissolved and diluted to 250.0 mL. A 25.00-mL aliquot was then boiled with 50.00 mL of 0.01255 M HCl. After cooling, the excess acid in the s
A student doing an experiment pours 0.160kg of heated copper shot into a 0.355-kg aluminum calorimeter cup containing 0.240kg of water. find the initial temperature of the shot
An atom of mass 3.32*10^(-26)kg oscillates in one dimension at a frequency of 10^13Hz, calculate the quantized energy levels
A 0.9092-g sample of wheat flour was analyzed by the Kjeldahl procedure. The ammonia formed was distilled into 50.00mL of 0.05063 M HCl; a 7.46-mL back-titration with 0.04917 M NaOH was required. Ca
A fox is chasing a bunny. The bunny is initially hopping east at 5 m/s when it first sees the fox. What was the bunny's average acceleration during this half-second interval
a heavy box of school books (mass is 50kg) was set down at rest on an inclined street (theta = 30 degrees). Draw a force Diagram of the box
A 3.4-m-tall, 40-cm-diameter concrete column supports a 2.0×105kg load, By how much is the column compressed
a little girl and her father are both playing on a merry go round in the park. what is the average angular velocity of the father
As an eager scientist on a hot summer day you wish to determine how much ice to buy to add to your cooler which is filled with 36 cans of soda which are warm at 81.7°F. how much ice needs
Why does fermentation preserve foods and why would a farmer purchase Rhizobium? Bacillus thuringiensis - most of the world's population relies on wheat for food.
A geiger-muller tube is a type of gas-filled radiation detector. It can detect particles like X-rays, alpha particles and beta rays (electrons). what is the density of the gas in this geiger tube
You drop a 297-g silver figure of a polar bear into the 203-g aluminum cup of a well-insulated calorimeter containing 257 g of liquid water at 21.7°C. What is the final temperature of the water,
If the speed of a particle is increased by a factor of 10, by what factor is its momentum changed, By what factor is its kinetic energy changed
a satellite orbits the earth a distance of 1.50x10^7m above the planet's surface and takes 4.89 hours for each revolution about the earth. what is the acceleration of this satellite
A fishing line has attached to it a hollow plastic float 2.65 cm in diameter and having a mass of 1.50 g. Find the mass of a lead weight
A reaction has a rate constant of 1.27×10?4/s at 29 degrees C and 0.234/s at 79 degrees C. A) Determine the activation barrier for the reaction. B) What is the value of the rate constant at 15
A Carnot engine works between temperatutes T1 = 495K and T2 = 302K. What is the Carnot coefficient of performance, KC, of the refrigerator
Describe how you would prepare each of the following aqueous solutions. - 230 g of a solution that is 0.60 molal in Na2CO3 starting with the solid solute. - 1.30 L of a solution that is 18.0% Pb(NO3
A 25.0-mL aliquot of vinegar was diluted to 250 mL on a volumetric flask. Titration of 50.0-mL aliquots of the diluted solution required an average of 34.88 mL of 0.09600 M NaOH. Express the acidity