Physics

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A rock sample contains 1/2 microgram of the parent radioactive isotope U-235 and 1/2 microgram of ... Started by ereecah	1 Replies 94 Views	Jul 27, 2018 by Bigfoot1984
If the efficiency of a reversible engine is 28., (a) what is its COP operated as a refrigerator? ... Started by viki	1 Replies 71 Views	Jul 27, 2018 by janieazgirl
An ideal fluid in a pipe of diameter 14. cm is moving at 6.0 m/s. (a) If the incompressible fluid ... Started by haleyc112	1 Replies 69 Views	Jul 27, 2018 by isabelt_18
John can hit a golf ball 310. m on Earth. On the moon's surface, g = g earth, so how far could he ... Started by drink	3 Replies 146 Views	Jul 27, 2018 by lou
Why won't a transformer work (stepup or stepdown potential) if a battery is connected across the ... Started by skymedlock	1 Replies 48 Views	Jul 27, 2018 by T4T
If the communication lifetime of civilizations in our galaxy is 10,000 years and our galaxy is 13 ... Started by Yolanda	1 Replies 51 Views	Jul 27, 2018 by kescobar@64
A rock sample contains 1/4 micrograms of the parent radioactive isotope K-40 and 3/4 micrograms of ... Started by OSWALD	1 Replies 99 Views	Jul 27, 2018 by kardosa007
What is the rms speed of a helium atom: (a) at 5. K? (b) at -196.C (the boiling point of N2)? (c) at ... Started by mcmcdaniel	3 Replies 77 Views	Jul 27, 2018 by kthug
A motorcycle stunt rider wants to jump a 179. m wide canyon. He arranges a ramp on one side so he ... Started by future617RT	1 Replies 151 Views	Jul 27, 2018 by eliasc0401
If a floating log is seen to bob up and down 15. times in a minute as waves pass by you, what is the ... Started by cmoore54	1 Replies 53 Views	Jul 27, 2018 by ghepp
What is the maximum theoretical efficiency possible for an engine operating between and 400C? ... Started by nramada	1 Replies 122 Views	Jul 27, 2018 by Cheesycrackers
The flywheel of a machine is rotating at 126 rad/s. Through what angle will the wheel be displaced ... Started by tingc95	3 Replies 93 Views	Jul 27, 2018 by Dunkey
The magnetic moment of a current loop does not depend upon A) the area. B) the current. C) the ... Started by darbym82	1 Replies 58 Views	Jul 27, 2018 by ebonylittles
The surface tension of water is 0.073 N/m. How high will water rise in a capillary tube of diameter ... Started by imanialler	1 Replies 247 Views	Jul 27, 2018 by Li Jun
The maximum torque is exerted on a current loop when the plane of the loop is at what angle to the ... Started by newyorker26	1 Replies 84 Views	Jul 27, 2018 by jaaaaaaa
If we place living cells in a nonpolar solvent like methane or ethane, A) their membranes will ... Started by deesands	3 Replies 98 Views	Jul 27, 2018 by joneynes
Arrange in order of increasing wavelength: blue, green, indigo, orange, red, violet, yellow. What ... Started by genevieve1028	1 Replies 93 Views	Jul 27, 2018 by kilada
Given that our galaxy has a volume of approximately 8 1012 ly3, what would be the average minimum ... Started by gonzo233	1 Replies 154 Views	Jul 27, 2018 by tranoy
Why are transformer cores made of laminated, rather than solid, magnetic material? What will be ... Started by tsand2	1 Replies 88 Views	Jul 27, 2018 by cclemon1
One side of a normal outlet is at 120 V AC, the other side is at A) -120 V AC. B) 0 V. C) 240 ... Started by oliviahorn72	3 Replies 73 Views	Jul 27, 2018 by Andromeda18
Suppose that the build-up of fatty tissue on the wall of an artery decreased the radius by 10. By ... Started by CORALGRILL2014	1 Replies 75 Views	Jul 27, 2018 by kkenney
The charge carried by one electron is e = -1.6 10-19 C. The number of excess electrons necessary to ... Started by cnetterville	1 Replies 84 Views	Jul 27, 2018 by ilianabrrr
The minimum current that will usually kill the average person is A) 10. A. B) 0.1 A. C) 1. A. ... Started by savannahhooper	1 Replies 36 Views	Jul 27, 2018 by fdliggud
Which of the following is NOT a basic requirement for chemically based life? A) a liquid medium ... Started by sdfghj	3 Replies 195 Views	Jul 27, 2018 by meryzewe
At what rate is the human body radiating energy when it is at 33C? Take the body surface area to be ... Started by jeatrice	1 Replies 155 Views	Jul 27, 2018 by kxciann