About 30% of the body of a person floating in the Dead Sea will be above the water line. Assuming that the human body density is 1.02 g/cm3, find the density of the water in the Dead Sea. Number i Units rad mm Save for Later Attempts: 1 of 5 used Submit Answer cm km Using multiple attempts will impact your score. h 20% score reduction after attempt 4 km/h cm/s km/s m^3 kW kPa MPa kN m^3/s g/cm^3 mg MW kg/s

About 30% of the body of a person floating in the Dead Sea will be above the water line. Assuming that the human body density is 1.02 g/cm3, find the density of the water in the Dead Sea. Number i Units rad mm Save for Later Attempts: 1 of 5 used Submit Answer cm km Using multiple attempts will impact your score. h 20% score reduction after attempt 4 km/h cm/s km/s m^3 kW kPa MPa kN m^3/s g/cm^3 mg MW kg/s

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter1: A Physics Toolkit

Section1.3: Measurement

Problem 19SSC

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Assume it takes 7.00 min to fill a 30.0-gal gasoline tank. (a) Calculate the rate at which the tank is filled in gallons per second. (b) Calculate the rate at which the tank is filled in cubic meters per second. (c) Determine the time interval, in hours, required to fill a 1.00-m3 volume at the same rate. (1 U.S. gal = 231 in.3)
The first atomic bomb was detonated on July 16, 1945, at the Trinity test site about 200 mi south of Los Alamos. In 1947, the U.S. government declassified a film reel of the explosion. From this film reel, British physicist G.I. Taylor was able to determine the rate at which the radius of the fireball from the blast grew. Using dimensional analysis, he was then able to deduce the amount of energy released in the explosion, which was a closely guarded secret at the time. Because of this, Taylor did not publish his results until 1950. This problem challenges you to recreate this famous calculation. (a) Using keen physical insight developed from years of experience, Taylor decided the radius rof the fireball should depend only on time since the explosion, t, the density of the air, , and the energy of the initial explosion, E. Thus, he made the educated guess that r=kEabtcfor some dimensionless constant kand some unknown exponents a,b, and c. Given that [E]=ML2T-2 , determine the values of the exponents necessary to make this equation dimensionally consistent. (Hint: Notice the equation implies that k=rEabtcand that [k]=1 ). (b) By analyzing data from high-energy conventional explosives, Taylor found the formula he derived seemed to be valid as long as the constant khad the value 1.03. From the film reel, he was able to determine many values of rand the corresponding values of t. For example, he found that after 25.0 ms, the fireball had a radius of 130.0 m. Use these values, along with an average air density of 1.25kg/m3 , to calculate the initial energy release of the Trinity detonation in joules (J). (Hint: To get energy in joules, you need to make sure all the numbers you substitute in are expressed in terms of SI base units.) (c) The energy released in large explosions is often cited in units of “tons of TNT” (abbreviated “t TNT”), where 1 t TNT is about 4.2 GJ. Convert yow answer to (b) into kilotons of TNT (that is, kt TNT). Compare your answer with the quick-and-duty estimate of 10 kt TNT made by physicist Enrico Fermi shortly after witnessing the explosion from what was thought to be a safe distance. (Reportedly, Fermi made his estimate by dropping some shredded bits of paper right before the remnants of the shock wave hit him and looked to see how far they were carried by it.)
dV An oil tanker aground on a reef is forming a circular oil slick about 0.1 foot thick. To estimate the rate (in cubic feet per minute) at which the oil is leaking from the tanker, it was found that the radius of the slick was increasing at 0.31 foot dt dR dV per minute (- = 0.31) when the radius R was 400 feet. Find using T 3.14. dt dt Tanker A=TR? V=0.1A R dV ft3 /min dt (Type an integer or a decimal. Round to the nearest whole number as needed.)
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DEA agents watch drug smugglers load cocaine onto a fishing boat in a Mexican river to transport it down the river to the ocean and then to Miami to estimate how much cocaine was loaded they measured how much further the boat sinks into the water after being loaded if the boats area at the water line is 50 m^2 and it sinks by 2 cm how much cocaine was loaded
Q5. Suppose that in vereniere rzulere measurament, Length is 4-32 cm, omd the stamdared is o. 085 cm. the meon deviation othere hand, On the in Screew gauge measurce ment, the mean readius is o.621 cm and the standared the deviation is o. 000 725 Calculate cm . volume (using przo pogation of erercore in reulere and ercrcoe reelation) fore Verrniere Scrrew gauge measurements .
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