A teenager is stealing gasoline from his father's car with a siphon with diameter of 12 mm. The heights in the figure are: z1 = 970 mm and z2 = 181 mm. Calculate the volumetric flow rate out of the tank. Round off the answer to two decimal digits in l/s, but enter your answer without the unit. Z₁ Answer: 22
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- Physicians use a machine called a spirometer to measure the maximum amount of air a person can exhale (called the forced vital capacity). Suppose you can exhale 4.0L. How many kilograms of air do you exhale? Assume that the density of air is 1.3 kg/m3.Your calculated density of aluminum is d = 2.7 g/cm³. The accepted value of the aluminum density is 2.70 g/cm³. The percent error (follow significant figures rules) is: Just put the number, no need for the % signOne mole of Gold (Au) atom has a mass of 197 g. We know that the density of gold is 19.30 g/cm3 in room temperature. Using those numbers, answer the following questions: a) What is the mass of a single gold atom in kg? b) Assume that gold atoms sit in a perfect cubic crystal structure. Estimate the distance between two gold atoms in meters. c) If we have a gold cube of 6 cm on each side, how many atoms can we fit along the edge of each side of the cube? d) What would be the mass, in kilograms, of the gold cube we discussed in part (c) (measuring 6 cm on each side)?
- The small capillaries in the lungs are in close contact with the alveoli. A red blood cell takes up oxygen during the 0.5 s that it squeezes through a capillary at the surface of an alveolus. What is the diffusion time for oxygen across the 1-μm -thick membrane separating air from blood? Assume that the diffusion coefficient for oxygen in tissue is 2×10^−11 m2/s. Give your answer to 1 significant figure.2 Density of water is 1000kg/m³. What is its density in units of g/cm? 3 A cylinder has length of 5.23 cm, a diameter of 2.75 cm, and a mass of 88.25 grams. Find the density of the cylinder in SI units. 4 A rectangular block has length 7.2 cm , breadth 5.4 cm and thickness 9 mm. What is the volume of the rectangular block in SI units?the shell is thin, but has a definite thickness. Calculate the (volume) density of the shell, in g/cm3. Here are the numbers: R = 28 cm M = 800 grams thickness = 0.3 mm
- Let Pa represent the density of aluminum and Pf that of iron. Find an expression of the radius (ra ) of a solid aluminum sphere that balances a solid iron sphere of radius rf on an equal-arm balanceFlow rate is expressed as gas velocity in cm/s. The gas is flowing through an open tubular column with an inner diameter of 0.25 mm. What volume flow rate (mL/min) corresponds to a gas velocity of 50 cm/s? (The volume of a cylinder is pr2 3 length, where r is the radius.)Juno is a construction worker. He has found a scrap piece of construction aluminum foil. The sheet has the dimensions of 1.00ft x 5.00ft. Juno knows the 3 aluminum density is 2. 70g/cm. He weighs it and finds its mass is 20.1 grams. Help Juno figure out how thick the sheet is. write your answer in millimeters and with the correct amount of significant figures.
- (a) What is the volume (in km3) of Avogadro’s number of sand grains if each grain is a cube and has sides that are 1.0 mm long? (b) How many kilometers of beaches in length would this cover if the beach averages 100 m in width and 10.0 m in depth? Neglect air spaces between grains.The atmospheric pressure at the time the video was taken was recorded by the National Weather Service as 30.10 inches of mercury, with the alternative measure of a sea level equivalent 1018.8 bar. What was the atmospheric pressure in the laboratory (we are only a few km from the Weather Service's station) in SI units? The standard unit of pressure is the pascal. For atmospheric pressure it is conventional to use kPa, kilopascal. Why is there a difference between the measured pressure locally and the sea level equivalent, apart from the continued use of imperial units for barometric pressure.A typical bathroom sink faucet releases about two gallons of water every minute. a) If it takes you 2.5 minutes to brush your teeth and you leave the water run for the entire time, how much water would be used? b) If you only run the water for 30 seconds, how much water would be used?