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A railroad car of mass 2.00 x 10^4 kg moving at 3.00 m/s collides, What is the speed of the three coupled cars after the collision
A small hot air balloon is filled with 1.02 x 10^6 L of air (d=1.20 g/L). As the air in the balloon is heated, it expands to 1.13 x 10^6 L. What is the density of the heated air in the balloon
A wheel free to rotate about its axis that is not frictionless is initially at rest. A wheel free to rotate about its axis that is not frictionless is initially at rest
What is the mass of a magnesium block that measures 2.3 cm * 3.5 cm * 1.5 cm? The density of magnesium is 1.738 g/cm^3
If a 500.0g cart had its velocity change from 1.65 m/s to 1.23 m/s over a period of 2.50 seconds. Calculate and record the force acting
A reaction has a rate constant of 0.0686 sec-1; how long will it take (in minutes) until 0.198 mol/L of the compound is left, if there was 0.715 mol/L at the start? (give answer to 3 sig figs using
A jogger takes 49 minutes to run 22 times around a track that measures 0.25 mile. What is her average velocity in mph and m/s
Someone points out that a ball, if released from rest on a hill, will roll down the hill with increasing momentum. explain the Law of Conservation of Linear Momentum
Diamonds are measured in carats where 1 carat= 0.200 g. The density of diamond is 3.51 g/cm^3. What is the volume of a 2.50-carat diamond
Sea birds tuck in their wings and dive straight down into the water when hunting for fish near the surface. If a pelican starts a dive from 16.0 m, with what speed will it strike the water
Research and apply at least 1 creative approach to determining a solution to the problem of motivating your seasonal workers to do their best work. Explain why you believe this is the best approach
How would the results differ if you added sodium p-toluate instead of p-toluic acid to the two-layer mixture of tert-butyl methyl ether and water
two charged particles, Q1=+4.60 nC and Q2=-2.50 nC, are separated by 32.0 cm. What is the eletrical potential energy of the pair
While visiting the Albert Michelson exhibit at Clark University, you notice that a chandelier swings back, Calculate the frequency of oscillation (in Hertz) of the chandelier
What volume of gold would be equal in mass to a piece of copper with a volume of 140.0 mL? The density of gold is 19.3g/mL; the density of copper is 8.96 g/mL.
A reaction has a rate constant of 0.00704 sec-1, how long will it take (in minutes) until 0.212 mol/L of the compound is left, if there was 0.619 mol/L at the start
A rubber ball of mass 27.5 g is dropped from a height of 1.85 m onto a floor. What impulse was applied to the ball during the collision
A tuning fork with a frequency of 440 Hz is held just above the top of a uniform glass tube containing water. What is the speed of sound in air
Order these five gases that occur in the troposphere from most abundant to least abundant: Rn, CO2, CO, N2, Ar and O2.
Estimate is in constant FY 1995 dollars, while the SPANIEL program cost estimate is in constant FY 1999 dollars. Which one of the following is the most valid way of comparing the costs of these two
Draw additional molecules of sulfanilamide and hypothesize the intermolecular interactions that are most important for providing a stable and selective crystal structure
What would happened if HCl was accidentally used instead of Na2CO3 to extract caffeine from tea bags? Would you be able to fix your mistake. How
A 100 W lightbulb produces 4.0 W of visible light. What is the light intensity on a wall 3.0 m away from the lightbulb
Calculate the pH of the solution after the addition of 30ml of 0.1M NaOH. Draw the structure of the form is His predominating in solution at neutral pH.
Consider the reaction with the rate law, Rate = k[BrO3-][Br-][H+]2 By what factor does the rate change if the concentration of BrO3- is doubled and that of Br- is doubled? Just put in the number as