need to nkow what a thermistor an controlling incubator does.
204035
thermistor is a type of resistor used to measure temperature changes, relying on the change in its resistance with changing temperature. Thermistor is a portmanteau of the words thermal and resistor.\n\nIf we assume that the relationship between resistance and temperature is linear (i.e. we make a first-order approximation), then we can say that:\n\nΔR = kΔT \nwhere\n\nΔR = change in resistance \nΔT = change in temperature \nk = first-order temperature coefficient of resistance \nThermistors can be classified into two types depending on the sign of k. If k is positive, the resistance increases with increasing temperature, and the device is called a positive temperature coefficient (PTC) thermistor, posistor or sensistor. If k is negative, the resistance decreases with increasing temperature, and the device is called a negative temperature coefficient (NTC) thermistor. Resistors that are not thermistors are designed to have the smallest possible k, so that their resistance remains almost constant over a wide temperature range.
267743
Try this http://www.solarwinds.net/ You can find out a lot about what the tool does.
447970
thermocouples are used to measure high temperatures.  click on the link for an explanation on how a thermocouple works.
151179
1.) Thermalcycler: machine that accomodates microcentrifuge tubes (or 96 well plates) and allows for a series of quick changes among set temperatures at set durations.  Vital for PCR and a host of other techniques.  Can double as a water bath.\n2.) Water bath: allows for uniformly holding a sample at a certain temperature.\n3.) Refrigerator: storage at cool temperature.\n4.) Freezer: storage at cold temperature.\n5.) Ultracold freezer: storage at liquid N temperature.\n6.) Incubator: storage at warm temperature (important for cloning of genes in bacteria).\n7.) Fume hood: pulls toxic fumes out of room.\n8.) Gel rigs: 1D agarose gel rigs, 2D gel rigs, acrylamide gel rig.  Used to separate and visualize genes and protein.\n9.) Centrifuge: Probably several of different sizes (and perhaps temperature).  Separate heavy or solid stages from lighter stages.\n10.) Shakers: ranging from mild agitation to vigorous vortexes.  Mixes substances and keeps them mixed.  You will regularly see these slowly going in the background of any genetics lab.\n11.) Microwave: cooking substances (like agarose).\n12.) Ethidium bromide bath (or other stains/destains): visualization of DNA/proteins in gels.\n13.) UV box with mounted camera: see EtBr flouresce and record.\n14.) Computers, binders, paperwork, shelves full of chemicals and platicware.\n15.) The following (among others) are often in cluster facilities or are seen in one person's lab but accessed by several geneticists:  automated sequencer, automated DNA extraction, microarray, cell imaging microscope, electron microscope, fragment sizer, etc.
623746
It is about negative feedback which involves:\n\n* Sense that temp has deviated from the homeostatic set point\n* That message is sent to the integrating system in the brain\n* Then an action potential is sent to the effector target to stimulate    muscles contraction to get the temp back up to the set point
163970
Take timer and thermometer.\n\nHeat the first metal, and check temperature every 5 seconds or so and write the temperature in a table.\n\nDo it with all the metals you want to check and compare the results.\n\nit should take about an hour depending on how many differnt metals you want to check, and it dont cost much.
461210
Keeping it below 3-4 deg C will keep it from hatching for a long time (try the fridge - but make sure it does not freeze). As soon as the temperature rises above a certain point, it will start to emerge.
591328
Theres a tool called a Handheld Anemometer, amazon has one inexpensive
100044
The conducting ink forms a resistor which does load the battery.  The thermochromic strip lies along the resistor and responds to the heat it generates.  The resistor is tapered, so its resistance per unit length increases as it gets narrower, and so does the temperature due to current flow.  The point along the strip where the temperature reaches the color-change value depends on the amount of current flowing in the resistor.  Thus the length of the changed color section indicates battery freshness.  This is a very approximate test.  A better tester loads the battery similarly, but measures the battery voltage under such loading.
435795
I believe you mean Beckman thermometer.  A web search will give you lots of sites and I believe most lab supply houses have them.  One example is given at the link, but the company is not endorsed by this anserer.
646323
1. Someone said heat rises - not true. Warm air is lighter than cold air, so warm air rises. The evaporator of the fridge being on top will give a more even 'cold' distribution. If the evaporator was on the bottom, the bottom of the fridge would always be colder than the top.\n2. Cold air is heavier than warm air. If the freezer is open on top, the cold air will not escape. If the freezer is upright, with no doors, the freezer will lose all of it's 'cold' air, it will spill out of the freezer.\n3. Radiation\n4. Pit vipers have an infrared sensor. It picks up the heat generated by the rat's body heat, in the form of radiation.\n5. speed of light.
398090
let us take 1kg  water at a initial temp = tdegrees\nthen dropp the metal in it\nnote the final temp\nheat lost by water=heat gained by metal\nnote the final equillibrium temp which would be same for the metal and water\nneglect the temp change of container
103904
ok ill try to explain cuz the guy before didnt. its all basically the same kinda questions.  using pv=nrt, 2 things stay constant  and 2 things change. and you put everything thatz constant on the right side, and then everything thatz changing on the left side. and you get a proportion relation, something like  p1v1 = p2v2  (for number 1 and 2), or p1/t1 = p2/t2. \nand the units are not important at all. the only units that are important is you have to have temperature in kelvin. \n\n1. so pv=nrt, and nrt stays constant in this. if it doesnt say anything about the number of mols changing or the temperature changing, assume its constant. \nso then p1v1 = p2v2. \n(99 kPa)(300mL) = (188kPa)v2\nv2 = (300mL) (99kPa) / (188kPa)\nv2 = 157.9787mL.\n\n2. same thing. p1v1 = p2v2\n(0.988atm)(1L) = p2 (2L)\np2 = (0.988atm) * (1L)/(2L)\np2 = 0.494atm.\n\n6.  so from pv = nrt. u gotta get all the constants on the right side. in this case, the constants are P and n. so divide both sides by p and t. \npv/pt = nrt / pt\nv/t = nr/p.     so if v changes, then t has to change accordingly to make sure that v/t is equal to nr/p at ALL times.\nso v1/t1 = v2/t2. \n(0.67L) / (89+273K) = (1.12L) / t2  \n(89+273K) * (1.12L) / (0.67L) = t2\nt2 = 605.134K\nt2 = 332 degrees celsius.
137484
A thermometer is the most common method...\n\nUsually weather thermometres use alcohol rather than mercury as it is cheaper, less hazardous than mercury, and you are unlikely to measure close to or above 75 degrees celcius (which is the boiling point of ethanol).\nA thermometer works by filling a tube with the alcohol, as the temperature increases then the alcohol expands, thereby increasing in volume and rising up the tube. When the temperature decreases then the ethanol contracts and takes less space, thereby moving down the tube.\nIf you were to heat an alcohol thermometer in a fire it will burst as the ethanol expands so much as to destroy the tube.\n\nSome thermometers have small parts in them that are pushed up the tube and when the temperature drops the parts are stuck ther until you shake them... this hepls measure a maximum temperature.\n\n\n\nThere are also electronic methods, however these are often dependant on the humidity (moisture in the air) as a conductor... you may see such instruments in a sauna close to the roof.\nOther electronic thermometers are dependant on metal strips that change shape due to heat, allowing small changes in temperature to be measured. Your toaster will use something similar as a thermostat.\n\nI dont know much about the electronic types...
415802
Hi Kitty,\nHere is what, I think, you need.\n\nExothermic, dH < 0, Entropy increases (dS > 0), Reaction is spontaneous and dG < 0\n\nExothermic, dH < 0, Entropy decreases (dS < 0), Reaction is spontaneous only at low temps, if |T dS| < |dH|\n\nEndothermic, dH > 0, Entropy increases (dS > 0), Reaction is spontaneous only  at high temps, if T dS > dH\n\nEndothermic, dH > 0, Entropy decreases (dS < 0), Reaction is not spontaneous, dG > 0
499727
Go with a line graph, that way you can also find out (or estimate) temperatures at times when you didnt measure it.
625296
A thermocuple might be the one you seek. \n\nThe seebeck effect on thermocouple uses this theory, as there are two different material soldered together to make a single V or U shaped bar, there is a point where those two metals met. When we heat that point, the heat will move the electron, and since one metal has different coefficient than the other, so the electron will move from one metal to the other, thus an electric current will be created.\n\nPeltier effect, uses the vice versa theory, thus if we put electrical current through that thermocouple, then the thermocouple will need to absorb heat from it surroundings, thus, it will lower the ambient temperature.\n\nI haven't got any clue on how effective does this "refrigerant" work, but I think It might, might, might, work..