Finding the speed of the airplane relative to air
After flying for 15 min in a wind blowing 42 km/h at an angle of 34° south of east, an airplane pilot is over a town that is 44 km due north of the starting point. What is the speed of the airplane relative to the air?
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Suppose that protons are fired towards the large flat side of a charged conducting plate. Initial speed of the protons is v0, and initial distance d. a) What is the minimum speed so that the protons will hit the plate?
Dimethylglyoxime, DMG, is an organic compound used to test for aqueous nickel(II) ions. A solution prepared by dissolving 65.0 g of DMG in 375 g of ethanol boils at 80.3°C. What is the molar mass of DMG?
Diethyl ether has a vapor pressure of 400.0 torr at 18°C. When a sample of benzoic acid is dissolved in ether, the vapor pressure of the solution is 342 torr. What is the mole fraction of benzoic acid in the solution?
A car is traveling over a hill. If, using a Cartesian coordinate system with origin O at the top of the hill, the hill;s profile is described by the function y=-(.003m^-1)x^2, where x and y are in meters, determine the minimum speed at which the c
The plates of a spherical capacitor have radii 31.0 mm and 32.0 mm. (a) Calculate the capacitance in picofarads. (b) What must be the plate area in square centimeters of a parallel-plate capacitor with the same plate separation and capacitance?
What critical value t* from Table C would you use for a confidence interval for the mean of the population in each of the following situations? An 80% confidence interval from a sample of size 7.
An unknown gas effuses at a rate that is only 0.468 times that of O2 at the same temperature. What is the molar mass of the unknown gas?
A lead ball is dropped into a lake from a diving board 18 ft. above the water. It hits the water with a certain velocity and then sinks to the bottom with this same constant velocity. If it reaches the bottom 5.60 s after it is dropped how deep is
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