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A person walks in the following pattern: 4.9 km north, then 1.5 km west, and finally 3.0 km south. (a) How far (in km) and (b) at what angle (measured counterclockwise from east) would a bird fly in
A black of mass m sliding on a frictionless table is attached to a horizontal string that passes through a tiny hole in the table.
A uniform stick is held horizontally and then released. At the same instant, one end is struck with a quick upwards blow. If the stick ends up horizontal when it returns to its original height, what
The laser in most supermarket barcode scanners operates at awavelength of 632.8 nm. What is the energy of a single photonemitted by such a laser? What is the energy of one mole of these photons?
A pendulum is made of a uniform stick of length L. It is allowed to swing in a vertical plane. Where should the pivot be placed on the stick so that the frequency of (small) oscillations is maximum?
The shark tank at an aquarium houses 5 sharks that deplete theaquarium water of a total of 50.00 grams of oxygen per hour. Waterfrom the tank is diverted through a bubbler unit that oxygenatesthe wa
A mercury barometer reads 770.0 mm on the roof of a building and 785 mm on the ground. Assuming a constant value of 1.29 kg/m3 for the density of air, determine the height of the building.
An object floats in water, with 55% of its volume submerged. What is its approximate density?
The equation, A = a*b*c becomes nonlinear at high concentrations of the absorbing substance. Suppose you prepare a solution with a very high absorbance that is suspect in not following the linear re
what is the tension in the string when the second ball directly beneath the first ball?
If you were monitring the titation by visible spectroscopy, what wavelength would you select for the data analysis? Why? How would you determine the end point of the tittaion based on the the recor
Positive point-charges of +16.5 μC are fixed at two of the vertices of an equilateral triangle with sides of 2.45 m, located in vacuum. Determine the magnitude of the E-field at the third vertex.
Terephthalic acid, used in plastics manufacture, contains only C, H, and O. Combustion of 19.81 mg of terephthalic acid sample produces 41.98 mg CO2 and 6.45 mg H2O. What is the empirical formula
If you were monitring the titation by visivle spectroscopy, what wavelength would you select for the data analysis? Why? How would you determine the end point of the tittaion based on the the recore
Three point charges have equal magnitudes, two being positive and one negative. These charges are fixed to the corners of an equilateral triangle, as the drawing shows. The magnitude of each of the
If a 1.00-g piece of gold (density = 19.32 g/cm3) is hammered into a sheet measuring 8.0 x 5.0 ft, what is the average thickness of the sheet in meters?
A spot of paint on a bicycle tire moves in a circular path of radius 0.33 m.When the spot has traveled a linear distance of 1.67 m, through what angle has the tire rotated? Give your answer in radia
A point is located in a polar coordinate system by the coordinates r= 2.5 m and 0= 35 degrees. Find the x- and y- coordinates of this point, assuming that the two coordinate systems have the same or
A body has a mass of 2000 kg. Determine the weight of the body expressed in N if it is (a) located on the surface of the earth, (b) it is located in a satellite orbiting at an altitude of 30,000 m,
What is the magnitude of the gravitational attraction between Saturn and Earth expressed in N. Assume that Earth and Saturn are aligned so that a straight line can be drawn from the sun through Eart
A sample of methane gas having a volume of 2.80 L at 25 degreesCelsius and 1.65 atm was mixed with a sample of oxygen gas having avolume of 35.0 L at 31 degrees Celsius and 1.25 atm. The mixture was
A satellite would have a mass of 200 kg on the surface of the moon. Determine the weight of the satellite in pounds when it is in orbit 10,000 mi. above the surface of the earth.
When 7.20 grams of H2SO4 (l) at 22.0oC are poured into a 94.0 gram mixture of ice and water containing 6.15 grams of ice, a solution of sulfurinc acid (aq)forms at a temperature of 13.0 oC.