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A train has a speed of v = 66.5 km/h. If the acceleration experienced by the passengers is to be less than 0.35 g, find the smallest radius of curvature R acceptable for the track
The density of ocean water at a depth of 10,000 m is 1.071 g/mol and if 27 g of water at that depth contains 185 mg of potassium chloride, what is the molarity of potassium chloride in the sample
A pressure gauge on a welder's tank gives a reading of 22.4 psig.The barometer reading is 26.6 in. Hg. Calculate the absolute pressure in the tank in:
Pick and element or compound and state how many grams of that substance are needed to have a mole of that substance.
The activation energy of a certain reaction is 76.4 kJ/mol. How many times faster will the reaction occur at 42C than at 0C
A 1382-kg car is moving westward with a speed of 21.1 m/s, Find the velocity of the center of mass of the car-truck system
What is the density (in g/L) of a mixture of equal numbers of moles of N2 and CO2 gas in a 8.00 L container at 298K if the pressure exerted is 19.0 atm
Boron is to be converted into N-type by Phosphorous dopant, so that the resistivity at T = 100 C is 1.2 ohm-cm. all atom are fully ionized. calculate the doping density of Phosphorous and the resisti
In a Compton collision, if the wavelength of the photon is 1.00 pm and its deflected angle is 60.0°
A 0.221 g sample of sodium carbonate was titrated to a pale yellow endpoint with HCl. What is the concentration of HCl
A very light rigid rod of length 0.600 m extends straight out from one end of a metre long rod of mass M. Determine the period of oscillation of the system
The tripeptide alanyllysylaspartate contains four ionizable groups with pKas of 2.0, 3.9, 9.9, and 10.5. Calculate the pI for this molecule.
A heat engine extracts 50.0kJ of heat from the hot reservoir each cycle and exhausts 35.0kJ of heat. What is the thermal efficiency
what is the molecular formula for a substance that contains in 1.00 mole of sample 1.00 mole of S, 24.1 x 10^23 atoms of F, and 71.0 grams of Cl
A lens for a 35-mm camera has a focal length given by f = 40mm. What is the magnification of the image on the film
A piece of aluminum foil 1.00cm square and 0.550mm thick is allowed to react with bromine to form aluminum bromide.
A typical wall outlet voltage is 120 volts in the United States. calculate the number of turns on the secondary coil of the adapter transformer
The specific heat capacity of a substance is 0.62 J/(g?K) and its molar mass is 225 g/mol. Find its molar heat capacity.
A garden hose has an internal diameter of 1.5 cm. It's connected to a sprinkler that consists merely of an enclosure with 14 holes, At what speed does it leave the sprinkler
The concentration of Pb2+ in a commercially available standard solution is 1.000 mg/mL. What volume of this solution should be diluted to 6.0 x 10^2 mL to produce a solution in which the concentatio
What is the efficiency of a pump that uses 3.5kW of electrical power in raising 200 litters of water through a height of 12m in 10 seconds
Would your calculation of the atomic mass of the metal be too high or too low if your hot metal sample cooled off, unbeknownst to you, while being transferred to the calorimeter
A spring of stiffness 25 kN m-1 is compressed by an initial load of 5 kN, gradually applied, What is the total work done on the spring
A bomb is designed to explode 2.00 s after it is armed. The bomb is launched from earth and accelerated to an unknown final speed. What is the final speed of the bomb just before it explodes
A solution is prepared by dissolving 0.16mol of acetic acid and 0.16mol of ammonium chloride in enough water to make 1.0 L of solution.