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Given data: velocity, v = 12 m/s Kinetic energy, KE = 30000 J Solution: Write the equation to find…

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Caleulaste the Mary of clrives ouf-2 m/s and houw 30000 J of •a coo thost energy-.

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter1: Units And Measurement

Section: Chapter Questions

Problem 59P: Estimate the number of molecules that make up Earth, assuming an average molecular mass of 30 g/mol....

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I Work A. Sample Problems: 1 F= 200 Newtons d=50 meters W=? |F=5 Newtons W=75 Joules D=? Worksheet - Work & Power Problems noitudiadu? Formula: Substitution: Answer with unit of measure: IW-125 Joules d=10 meters Two won enoose Of mi F=? ozsom to rinu diw towanA Formula: Substitution: Answer with unit of measure: owesom to timu diw towanA Formula: Substitution: Answer with unit of measure: zoluol Or zba0002 76/ boar I If 150 Joules of work is needed to move a box 10 meters, what force was used?
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A 1.28-kg sample of water at 10.0 is in a calorimeter. You drop a piece of steel with a mass of 0.385 kg at 215 into it. After the sizzling subsides, what is the final equilibrium temperature? (Make the reasonable assumptions that any steam produced condenses into liquid water during the process of equilibration and that the evaporation and condensation don't affect the outcome, as we'll see in the next section.)
Many decisions are made on the basis of the payback period: the time it will take through savings to equal the capital cost of an investment. Acceptable payback times depend upon the business or philosophy one has. For some industries, a payback period is as small as 2 yeas) Suppose you wish to install the extra insulation in the preceding problem. If energy cost $1.00 per million joules and the insulation was $4.00 per square meter, then calculate the simple payback time. Take the average T for the 120-day heating season to be 15.0 .
If a marathon runner averages 9.5 mi/h, how long does it take him or her to run a 26.22-mi marathon?
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Amy 68 kg in mass eat a Sausage 'N Egg McMuffin and drink a medium size orange juice for breakfast. After breakfast, she decides to "work off" all the consumed energies by running up a 5-degree slope trail at 15 km/h. [Answer in 2 significant figures] Use 1 cal = 4.184 J. %3D Food Energy content in Cal Sausage 'N Egg McMuffin 480 Medium size orange juice 190 Activity on level ground Metabolic power (W) Running at 15 km/h 1150 [Answer in 2 significant figures] What is the necessary metabolic power for Amy? [Hint: You can model her power needs as the sum of the power to walk on level ground plus the power needed to raise her body by the appropriate amount. Assume that the efficiency of the body in using energy is 25%] How far did Amy run to work off all the energies she consumed?
i docs.yougle.com/forms E Under resting conditions che bady energy is being useci as folows O 2/sby t1e livor end splee O 20 %by thr skeletal musules Uncer resting conditions :he body energy is being used as folows.* O 19% by the brair O. 15%. by the kirlnry. Wa can write the first law of thermodynamics as: * O AJ=A, -AW. O AU=A0 +Aw.. Ikcal = J O 1 Kcel -4184). O 1koa -11181) IMet = kcalm2* O 1 met = 50 Kca /m hr O 1 rmrl =55 Ke /m hr 011 Many seople with high blood pressure can lower their blood pressure into e healthy range or keep their numbers in a healthy range by making lifestyle changes. Talk with your health care team about Grtting at Irant 150 minutos af O nhysiral ar:tivity anch wrak (ahni.t 30 minutes a day, 5 dayn a wenk) O smaking Blood pressure is measured using two nurmbers: O 120/30 mmHg." O 135/75 A small percentage (- %) of the food is excrotod in the fucos and urine.* O b-15% b- 15% l'age 3 of 1 Back Next Kaver atmit paaawerda Yegh Cang a Fors The fon wes createc…
In a refrigeration system, the refrigerant gas absorbs 21.39 kJ of energy while expanding against a0.278 atmosphere pressure from a volume of 0.0423 liters to a volume of 1.876 liters. What is the change in the internal energy of the gas? Note that 1 literxatmosphere is equal to .101.325 joule