Jou pour 750g of hot cof'fee iato aluminum mess is 2sg. You measured He 90°C. You thee cup wkose +emp ot the eotfee to be place 100g - (0°C in to the coffee, be the final eguilibriom te mop? ice, whese initial temp , wlaat eill is Ccoffoo 400O :4186 Cice i20oo Ca= 300 Lica z33400
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- loclk lyimy moot Sontace is Connect w ifh a p Cons tan Co mpressed a dis tance b 3.0 cn from ;h eỖwhhbr:uv. pos:týcn what issl done by sprwy foree 3.0 Cmg & SprAt sufficiently high temperatures, the thermal speeds ofgas molecules may be high enough that collisions may ionize amolecule (that is, remove an outer electron). An ionized gas inwhich each molecule has lost an electron is called a “plasma.”Determine approximately the temperature at which air becomesa plasma.In 1986, a gargantuan iceberg broke away from the Ross Ice Shelf in Antarctica. It was approximately a rectangle 160 km long, 40 km wide, and 250 m thick. C. How long, in years, would it take sunlight alone to melt ice this thick, if the ice absorbs an average of 100 W/m^2, 12.00 hours per day?
- F4 F6 gass containe r has a total wall area Cincluding the lid) of 1-75 m² and a wal thick ness of 1.5 cm. It's filled with 1000g of ice Completely melt at conductiví ty of glass at OC. How many seconds will it take to fusion Is 80 cal/g and Ther mal SC OELETE the ice ? (latent heart of is D-8 w/m k) BACKSPACE TAB a) 120 s S LOCK c) Q,8005 d:) 200 s ENTEcalculate The Pot ential of the p-n divider created in the re st from two 22 parches, one containing 3. donor atoms and the other Cont ain9 18 corresponding atoms at rom temperature if you knou that hi =1.9*10/m utBefore going in for an annual physical, a 70.0-kgkgperson whose body temperature is 37.0∘C Consumes an entire 0.355-literliter can of a soft drink (which is mostly water) at 12.0∘C What will be the person's body temperature TfinalTfinal after equilibrium is attained? Ignore any heating by the person's metabolism. The specific heat capacity of a human body is 3480 J/kg⋅KJ/kg⋅K. Is the change in the person's body temperature great enough to be measured by a medical thermometer? (A high-quality medical thermometer can measure temperature changes as small as 0.1∘C∘C or less.)
- How much energy is required to convert 0.10 kg of water at 100∘C to steam at 100∘C? Heat of vaporization at the boiling temperature for water is Lv = 2.256E6 J/kg Express your answer to two significant figures and include the appropriate units.Q2. (a) Starting with the assumptions made, show that according to Einstein’stheory of specific heat of solids, at very low temperatures Cv varies exponentially with temperature T . (b) Explain why the contribution of free electrons to the total specific heat of a metallic solid is negligible at high temperatures.An aluminum sphere is 8.40 cm in diameter. What will be its % change in volume if it is heated from 30∘C to 120 ∘C? Answer in terms of % .
- (6) An aluminum tube is 30000m long at 20oC. What is its length at (a) 1000C and (b) OoC?(3786g) of water that starts out at c) H ow much energy (Joules) is required to boil off 1 gallon 21.50C? (See pt. b above for useful constant.)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.)