How do scientists cool objects to absolute zero?
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Q: What is the vrms of hydrogen on the surface of the sun if its temperature is 5.36E3 degC? What is…
A: given that,M=1 gmol=10-3 kgmolT=5360 °C =5633 KR=8.314 Jmol K
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Q: The temperatures of objects A and B are measured, and it is seen that the temperature of B is 72 K…
A: Given TB-TA=72K Recall T=273.15+θWhere θ is in degree celsius.
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Q: How much heat does it take to vaporize 800 g of liquid nitrogen (N 2)?
A: The expression for the heat to vaporize is,
How do scientists cool objects to absolute zero?
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- Satellites designed to observe the radiation from cold (3 K) dark space have sensors that are shaded from the Sun, Earth, and Moon and that are cooled to very low temperatures. Why must the sensors be at low temperature?What is the vrms of hydrogen on the surface of the sun if its temperature is 5.36E3 degC? What is the vrms of hydrogen on the surface of the earth if its temperature is 21.2 degC?A window has heavy curtains in front of it. At night the curtains are closed to minimise heat loss. During the day the curtains are pulled aside exposing the glass window. How much heat is lost through the 1.0 m x 1.0 m square glass window pane that is 4mm thick when the inside temperature is 20 degree C and the outside temperature is -6 C (negative 6.0) in 12 hrs? ( 1m = 100 cm) (1m = 1000mm) %3D
- The next four questions use this description. Our Sun has a peak emission wavelength of about 500 nm and a radius of about 700,000 km. Your dark-adapted eye has a pupil diameter of about 7 mm and can detect light intensity down to about 1.5 x 10-11 W/m2. Assume the emissivity of the Sun is equal to 1. First, given these numbers, what is the surface temperature of the Sun in Kelvin to 3 significant digits? What is the power output of the Sun in moles of watts? (in other words, take the number of watts and divide it by Avogadro's number) Assuming that all of the Sun's power is given off as 500 nm photons*, how many photons are given off by the Sun every second? Report your answer to the nearest power of 10 (e.g. if you got 7 x 1024, give your answer as 25).If a mercury thermometer is immersed in hot liquid, the mercury level goes down at first and then goes up. Explain why this happens.How to find the number of atoms in an iron cylinder given its mass(g)?