Physics

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When you float in fresh water, the buoyant force that acts on you is equal to your weight. When you ... Started by cookcarl	1 Replies 114 Views	Jul 29, 2018 by Cnarkel
An ice cube with large air bubbles in it floats in a brim-full container of water. When the ice cube ... Started by mmm	1 Replies 200 Views	Jul 29, 2018 by AngeliqueG
A floating ice cube contains small pieces of iron. The water level after melting will A) rise. ... Started by imanialler	1 Replies 124 Views	Jul 29, 2018 by Fayaz00962
A heavy iron ball is placed in an aluminum pie pan that floats in a bucket. The water level at the ... Started by TVarnum	3 Replies 66 Views	Jul 29, 2018 by amanda_14
When a barrel of water in a rowboat in a swimming pool is poured overboard, the pool level A) ... Started by SGallaher96	1 Replies 272 Views	Jul 29, 2018 by hanadaa
When a load of wood is thrown overboard from a boat in a swimming pool, the pool level A) rises. ... Started by go.lag	1 Replies 389 Views	Jul 29, 2018 by aruss1303
If the part of an iceberg that extends above the water were suddenly removed, the A) iceberg ... Started by naturalchemist	1 Replies 125 Views	Jul 29, 2018 by Joy Chen
About what percentage of molecules in the air make up the atmosphere below a 6-kilometer altitude? ... Started by lbcchick	3 Replies 106 Views	Jul 29, 2018 by zenzy
Atmospheric pressure is caused by the A) density of the atmosphere. B) weight of the atmosphere. ... Started by Kthamas	1 Replies 60 Views	Jul 29, 2018 by emily12345
When you observe the applications of pistons in lifting operations you're seeing A) Pascal's ... Started by justinmsk	1 Replies 68 Views	Jul 29, 2018 by momolu
At normal atmospheric pressure and temperature, 1 cubic meter of air has a mass of about A) 1.00 ... Started by Tazate	1 Replies 75 Views	Jul 29, 2018 by fur
The attraction between like substances, stickiness, is called A) adhesion. B) cohesion. C) ... Started by Themember4	3 Replies 99 Views	Jul 29, 2018 by nikmaaacs
A consequence of surface tension for water is A) capillary action. B) wet sand being firmer than ... Started by scienceeasy	1 Replies 95 Views	Jul 29, 2018 by memslove
A very lightweight horizontal loop of wire is suspended from a fine spring, lowered into water, and ... Started by Deast7027	1 Replies 61 Views	Jul 29, 2018 by djpooyouma
The energy source responsible for molecular motions in Earth's atmosphere is A) their own natural ... Started by pragya sharda	1 Replies 69 Views	Jul 29, 2018 by swimkari
When you place a stick in water and remove it, the stick is wet. If you instead place it in mercury ... Started by Ebrown	3 Replies 97 Views	Jul 29, 2018 by todom5090
Alcohol is less dense than water. If alcohol is used to make a barometer at normal atmospheric ... Started by jwb375	1 Replies 63 Views	Jul 29, 2018 by underwood14
What approximate weight of air is in a column 1-cm2 in cross section that extends from sea level to ... Started by WWatsford	1 Replies 63 Views	Jul 29, 2018 by braelync
When a suction cup sticks to a wall it is A) pulled to the wall by the vacuum. B) pushed to the ... Started by PhilipSeeMore	1 Replies 75 Views	Jul 29, 2018 by macagn
The mass of air inside an average mid-size automobile is about A) 0.2 kg. B) 2 kg. C) 20 kg. ... Started by KimWrice	3 Replies 99 Views	Jul 29, 2018 by shayla
The weight of air in a bathtub (about 1/3 cubic meter) is about the same as the weight of A) a ... Started by rmenurse	1 Replies 95 Views	Jul 29, 2018 by leeeep
It would be easier to pull the evacuated Magdeburg hemispheres apart if they were A) held upside ... Started by jc611	1 Replies 74 Views	Jul 29, 2018 by Mholman93
If one of the pair of Magdeburg hemispheres were fastened to a strong tree, the force needed by a ... Started by JGIBBSON	1 Replies 109 Views	Jul 29, 2018 by 31809pancho
When a gas in a container expands to twice its volume, its density A) halves. B) doubles. C) ... Started by kshipps	3 Replies 104 Views	Jul 29, 2018 by bigcheese9
A swimmer cannot snorkel more than a meter deep because air A) in the lungs cannot easily be ... Started by ereecah	1 Replies 66 Views	Jul 29, 2018 by prumorgan