The digital thermometers that we use in the lab today are similar to the ones that we use in our homes, but several years ago scientists used to use glass thermometers that contained a thin column of mercury to measure temperature. Why do you think we no longer use the mercury thermometers in the lab?

The digital thermometers that we use in the lab today are similar to the ones that we use in our homes, but several years ago scientists used to use glass thermometers that contained a thin column of mercury to measure temperature. Why do you think we no longer use the mercury thermometers in the lab?

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter8: Natural Convection

Section: Chapter Questions

Problem 8.26P

See similar textbooks

Similar questions

Discuss how you might measure the bulk modulus of a liquid.
For a gas, which of the following does not vary with temperature? - the gas soecific weight - the gas dynamic viscosity - the gas specific volume - the gas constant R - the gas density
During a mountain climbing trip it is observed that the water used to cook a meal boils at 93 °C rather than the standard 100 °C at sea level. At what altitude are the climbers preparing their meal? (See Physical Properties of Water (SI Units) and Properties of the U.S. Standard Atmosphere (SI Units) for data needed to solve this problem.) Wiley saids the answer is 2059.7m. I'd appreciate it if somebody would work it out for me
1. How did Galileo’s invention of the telescope support Copernican theory? 2. How has the changing technology increased our understanding of the universe?
A thin plate moves between two parallel, horizontal, stationary flat surfaces at a constant velocity of 5 m/s. The two stationary surfaces are spaced 4 cm apart, and the medium between them is filled with oil whose viscosity is 0.9 N⋅s/m2. The part of the plate immersed in oil at any given time is 2-m long and 0.5-m wide. If the plate moves through the mid-plane between the surfaces, determine the force required to maintain this motion. What would your response be if the plate was 1 cm from the bottom surface (h2) and 3 cm from the top surface (h1)?
Explain why an absolute temperature is defined and give its SI units.
At a shear rate of 10 s-1, the apparent viscosity of non-Newtonian liquid was found to be 1.0 Pa.s. At a shear rate of 100 s-1, the apparent viscosity of the same liquid was found to be 0.5 Pa.s. If the liquid follows power law behavior, determine the apparent viscosity (in Pa.s) at a shear stress of 10 Pa.
As he rides the train to work on a - 4ºC winter day, Mr. Trump notices that he can hear the click ofthe train going over the spaces between the rails. Six months later, on a 30ºC summer day, the railsare pushed together and he hears no clicks. If the rails are 5 meters long when the temperature is30ºC, how large a gap is left between the steel rails (α steel = 1.2 x 10 - 5 ºC -1 ) on the cold winter day?
When we take a shower with hot water, once we stop receiving water we experience a greater sensation of cold than if we had showered with cold water. Investigate and make an argument based on the concepts studied in physics (especially temperature and heat) and support your arguments with a development of equations or mathematical relationships that demonstrate your answer.
A father and son conducted the following simple experiment on a hot dog which measured 12.5 cm in length and 2.2 cm in diameter. They inserted one food thermometer into the midpoint of the hot dog and another one was placed just under the skin of the hot dog. The temperatures of the thermometers were monitored until both thermometers read 20°C, which is the ambient temperature. The hot dog was then placed in 94°C boiling water and after exactly 2 min they recorded the center temperature and the skin temperature of the hot dog to be 59°C and 88°C, respectively. Assuming the following properties for the hot dog: r = 980 kg/m3 and cp = 3900 J/kg·K and using transient temperature charts, determine (a) the thermal diffusivity of the hot dog, (b) the thermal conductivity of the hot dog, and (c) the convection heat transfer coefficient.
1. The boiling temperature of water is 100 °C. If you put boiling water in a mugplaced at the table top, you observed that after some time the water cools down,decreasing the temperature of water in the mug. Why is this so? Explain using theZeroth Law of Thermodynamics. What happens to objects when temperature increases? For instance, a jar cover an be removed by putting the cover in hot water. Why is this so?
(b). Calculate the capillary effect in mm in a glass tube of 4.4 mm diameter, when immersed in (1) water (2) mercury. The values of surface tension in contact with air are 0.0742 N/m and 0.66 N/m respectively. The contact angle for water =0° and mercury =130°.