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A train is traveling up a 3.3 incline at a speed of 2.45 when the last car breaks free and begins to coast without friction. How long does it take for the last car to come to rest momentarily?
After the block is released, it leaves the spring and continues to travel upwards. What height above the point of release will the block reach if air.
An aqueous solution of 10.0 g catalase, an enzyme found in the liver, has a volume of 1.00 L at 27 o C. The solutions osmotic pressure at 27 o C is 0.74 torr. Calculate the molar mass of catalase.
A hunter wishes to cross a river that is 2.4 km wide and that flows with a speed of 6.0 km/h. The hunter uses a small powerboat that moves at a maximum speed of 9.5 km/h with respect to the water. W
Suppose 3 mol of neon (an ideal monatomic gas) at STP are compressed slowly and isothermally to 0.25 the original volume. The gas is then allowed to expand quickly and adiabatically back to its ori
a sample of a covalent compound with a mass of 1.350 g lowers the freezing point of 10.00 g of benzene by 3.66 when dissolved. what is the molar mass of the compound?
Find expressions for the phase evolution during time throughout the experiment using the boundary condition that phase is zero when the magnetization vector M is parallel to y'.
What volume of 0.200M HCl would be required to neutralize 30.00mL of 0.158M Ca(OH)2? Don't forget stoichiometry.
A proton orbits just at the surface of a charged sphere of radius 0.83 cm. If the speed of the proton is 4.96 X105 m/s, what is the charge on the sphere?
Write down an expression for the vertical velocity w(z) in terms of the constant S, the funnel radius r(z), and the density of water rhow (also constant). Pay attention to units. You can use rhow =
A car drives north at 46 for 10 and then turns east and goes 5.0 at 60 . Finally, it goes southwest at 30 for 6.0. What is the average velocity?
The vapor pressure of benzene (C6H6) is 120 torr at 27.0C, and its normal boiling point is 80.1C. What is the molar heat of vaporiza- tion of benzene?
If the coefficient of friction between the road and the tires on a rainy day is 0.1, what is the minimum distance in which the car will stop? What is the stopping distance when the road is dry and t
What friction force must act on the bottom of the ladder to keep it from slipping? Neglect the (small) friction force between the smooth wall and the ladder.
The helical molecule acts like a spring and compresses 1.23% upon becoming charged. Determine the effective spring constant of the molecule.
120L weather balloon is filled with 5.9 moles of helium has a small leak, if the helium rate is 10mmol/hr, what is the volume after 34 hours.
If electrical energy costs $0.080/kWh, what does it cost to raise the 200 kg of water in the tank from 15 degrees Celsius to 80 degrees Celsius?
A car is moving down a street at 59 km/h. A child suddenly runs into the street. If it takes the driver 0.80 s to react and apply the brakes, how many meters will the car have moved before it begin
How long will it take 10.0 mL of Cl2 gas to effuse through a porous barrier if it has been observed that 76.3 minutes are required for 10.0 mL of HCl gas to effuse through the same barrier?
Calculate the pH of the solution made by adding 0.50mol of HOBr and 0.30 mol of KOBr to 1.00 L of water. The value of Ka for HOBr is 2.0×10-9.
At t = 5.0 seconds, the cheetah is standing still, having knocked over the gazelle. What is the average acceleration of the cheetah from t = 0 to t = 5.0 seconds?
What is the difference in blood pressure (mm-Hg)between the top of the head and bottom of the feet of a 1.60 m tall person standing vertically
What is the percent yield of ferrous sulfide if the actual yield is 220.0 g and the theoretical yield is 275.6 g?
An object is 9.27 cm from the surface of a reflective spherical Christmas tree ornament 8.38 cm in diameter. What is the position of the image?
A roof tile falls from rest from the top of a building. An observer inside the building notices that it takes 0.15 s for the tile to pass her window, whose height is 2.2 m. How far above the top of