A A 2.3 m long metal bar is heated so that temperature increase by 56°C. The...
A 2.3 m long metal bar is heated so that temperature increase by 56℃. The bar increases in length by 1.67 mm. The coefficient of linear expansion of the bar is; A. 15 x 10 -5 ℃ -1 B. 13 x 10 -5 ℃ -1 C. 11 x 10 -5 ℃ -1 D. 22 x 10 -5 ℃ -1 E. None of the above.
There are 5.00x10 26 atoms/m 3 in a container of argon gas (atomic mass number 40). The pressure in the container when the atoms have a rms speed of 350 m/s is: A. 4.53x10 4 N/m 2 B. 1.01x10 4 N/m 2 C. 1.01x10 5 N/m 2 D. 1.36x10 5 N/m 2 E. None of the above.
There are 5.00x10^26 atoms/m3 in a container of argon gas (atomic mass number 40). The pressure in the container when the atoms have a rms speed of 350 m/s is: A. 4.53x10^4 N/m2 B. 1.01x10^4 N/m2 C. 1.01x10^5 N/m2 D. 1.36x10^5 N/m2 E. None of the above.
A 1.00 kg copper bar is heated to atmospheric pressure so that its temperature increases from 20 ° C to 50 ° c. The density of copper is 8.92 x 103 kg and the coefficient of volumetric expansion is 4.5 x 10-5 (C0) -1 Determine the change in volume of the copper bar. (Remember that p = m / V)
An iron rod is 200 m long at 20°C. What will be the increase in length when heated to 220°C? The coefficient of thermal expansion of iron is 12 x 10-6 °C-1. A. 0.48 m B. 0.36 m C. 0.24 m D. 0.12 m E. 0.06 m
A 2.0 kg bar of copper is heated at atmospheric pressure so that its temperature increases from 20°C to 50°C. (a) What is the work done on the copper bar by the surrounding atmosphere? SOLUTION Conceptualize This example involves a solid, whereas the preceding two examples involved liquids and gases. For a solid, the change in volume due to thermal expansion is very small. Categorize Because the expanslon takes place at constant atmospheric pressure, we categorize the process as isobaric...
A rigid container holds both oxygen gas (O2) and nitrogen gas (N2) at 100°C. The atomic mass numbers for nitrogen and oxygen atoms are 14 and 16 respectively. Which statement describes their rms speeds? A. Vrms of O2 < Vrms of N2 B. Vrms of O2 = Vrms of N2 C. Vrms of O2 > Vrms of N2 D. All of the above. E. None of the above.
When rubidium ions are heated to a high temperature, two lines are observed in its line spectrum at wavelengths (a) 7.67 x 10-7 m and (b) 3.99 x 10-7 m. What are the frequencies of the two lines? What color are the lines? Choose the answer that best completes the following: The existence of atomic line spectra indicates that. . . the energy of a photon depends on its frequency. all orbitals in s subshells must be spherical in shape....
A metal bar of length 6.33 m and linear expansion coefficient of 2.74x105 /°C has a crack half-way along its length as shown in figure (a). After a 45.0-°C temperature rise, the metal buckles upward, having a height h above its original position as shown in figure (b). Find h Submit AnswerTries 0/14
The bronze bar 3-m long with a cross-sectional area of 350 mm2 is placed between two rigid walls. At a temperature of -20 oC, there is a gap Δ = 2.2 mm, as shown in the figure. Use α = 18 x 10-6/ oC and E = 80 GPa. (A)What is the increase in temperature in oC at which the compressive stress in the bar will be 30 MPa? (B) What is the final temperature in oC at which the...