Some incandescent light bulbs are filled with argon gas. What is Vrms for argon atoms near the filament, assuming their temperature is 3000 K? The atomic mass of argon is 39.948 u. m/s
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- Q1: Calculate electrons and holes concentration in a germanium sample . If T-300 K, Nd=5×10¹%/m³, N₁-0. Assume that n=2.4×10¹9/m³. (Ans: 5.97×10¹9/m³, 9.65×10¹8/m³)How many Rh R h atoms would have to be placed side by side to span a distance of 9.5 μm μ m ?Some incandescent light bulbs are filled with argon gas. What is vrms (m/s) for argon atoms near the filament, assuming their temperature is 2950 K? The atomic mass of argon is 3.948 u.
- Problems Q1: Calculate electrons and holes concentration in a germanium sample If T=300 K, Na-5×10¹%/m³, N₁-0. Assume that n=2.4×10¹⁹/m³. (Ans: 5.97×10¹⁹/m³, 9.65×10¹8/m³)Much of the gas near the Sun is atomic hydrogen. Its temperature would have to be 1.50 107 K for the average speed vrms to equal the escape speed of the Sun. What is that speed? The atomic mass of hydrogen is 1.008 10-3 kg/mol.A single-walled carbon nanotube has 2.3x 1019 carbon atoms per m2 along its surface. The nanotube diameter is 1.4 nm. (a) Find the mass density of the nanotube in kg/m3. (b) Compare your answer to (a) with the density of steel, about 7800 kg/m3.
- 2.00 mol of the helium is confined to a 2.00-L container at a pressure of 11.0 atm. The atomic mass of helium is 4.00 u, and the conversion between u and kg is 1 u = 1.661 ××10−27 kg. 1)Calculate vrms. (Express your answer to three significant figures.)Determine the number of atoms in a block of pure Gallium measuring 3 inch x 0.1 feet x 0.1 yards. Assume the atomic weight and density of Ga are 69.723 grams/mole and 5910 kg/cubic meter, respectively.A geiger-muller tube is a type of gas-filled radiation detector. It can detect particles like X-rays, alpha particles and beta rays (electrons). This is useful in quantizing the activity of a radioactive source or determining if an area containing radioactive material is safe to enter. Assuming that you have one mole of gas, if a geiger counter is filled with 9502 Pa of argon gas at room temperature (T = 21.1 C), what is the density of the gas in this geiger tube?
- Weight of the ozone layer 1.0p 1 Incredibly, the ozone layer in the upper atmosphere that protects us from the ultraviolet rays of the Sun varies somewhat but, on the average, would be less than one centimeter thick if it were brought down to sea level. Given that the density of ozone at sea level would be about 2.0 grams per litre, what is the total amount of ozone (in Tonnes) in the upper atmosphere when its sea-level thickness is 0.22 cm? Take the radius of the Earth to be 6400 km. (The volume of a thin skin around an object is the surface area of the object times the skin thickness.) Give your answer in gigatonnes, and do not specify units in the answer box. Answer Show feedback Updated just now 4What is the root mean square velocity, vrms, for Helium atom (He) at 66oC? Hint: How many amu does an He atom contain? 1 amu = 1.67 x 10-27 kg Boltzman's Constant, k = 1.38 x 10-23 J/K Give your answer in m/s to 4 significant figures (NO DECIMALS)Q. 8: K.E. per unit volume is given by 3 2 (a) E=P (b) E=3 3 (c) E = mv² (d) None of these (CET-2003)