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- Some incandescent light bulbs are filled with argon gas. What is vrms for argon atoms near the filament, assuming their temperature is 2500 K?Suppose that the average velocity (vrms) of carbon dioxide molecules (molecular mass is equal to 44.0g/mol ) in a ?ame is found to be 1.05105m/s. What temperature does this represent?(a) Estimate the specific heat capacity of sodium from the Law of Dulong and Petit. The molar mass of sodium is 23.0 g/mol. (b) What is the percent error of your estimate from the known value, 1230 J/kg ? `
- Thermal expansion (6) An aluminum tube is 30000m long at 200C. What is its length at (a) 1000C and (b) OoC? (7) What is the change in length of a rod made up of 2000m of copper and 1000m of aluminum placed end to end as it moved from an ice water bath to a steam bath? (8) A structural steel l-beam is 15m long when installed at 200C. How much will its length change over the temperature extremes -300C to 500C? ANS. 1.32cm (9) A metal rod made of some alloy is to be used as a thermometer. At OoC its length is 40000cm, and at 1000C its length is 40060cm. (a) What is the linear expansion coefficient of the alloy? (b) what is the temperature when its length is 39975cm? (10) A hole with diameter of 2cm is driled through a stainless steel pate at room temperature (200C). By what fraction (Dr/r) will the hole be larger when the plate is heated to 1500C? (11) Calculate the fractional change in volume (Dv/v) of an aluminum bar that undergoes a change in temperature of 300C.(6) An aluminum tube is 30000m long at 20oC. What is its length at (a) 1000C and (b) OoC?14.) A fixed mass of an ideal gas is heated from 60C to 90C at a constant volume. (a) 1m^3 and (b) 3m^3. For which case do you think will the energy be greater? a.(a) 1 m^3 since it's a smaller volume b.(b) 3 m^3 since it's a larger volume c.none of the cases d.same for both cases since Cv doesn't vary with volume
- A steel measuring tape used by a civil engineer is 50metres long and calibrated at 200C. The tape measures a distance of 35.694m at 350C. What is the actual distance measured? D = DLLT()0) a Coefficient of linear expansion of steel a = 1.2 x10-5 oC-1تسجيل hamid O PowerPoint Slide Show - Bio+ Physics- Lecture - PowerPoint Thermal expansion (6) An aluminum tube is 30000m long at 200C. What is its length at (a) 1000C and (b) OoC? (7) What is the change in length of a rod made up of 2000m of copper and 1000m of aluminum placed end to end as it moved from an ice water bath to a steam bath? عباس عبد القادر حم. . . (8) A structural steel l-beam is 15m long when installed at 200C. How much will its length change over the temperature extremes -300C to 500C? ANS. 1.32cm (9) A metal rod made of some alloy is to be used as a thermometer. At OoC its length is 40000cm, and at 1000C its length is 40060cm. (a) What is the linear expansion coefficient of the alloy? (b) what is the temperature when its length is 39975cm? شیماء صدام احمد (10) A hole with diameter of 2cm is drilled through a stainless steel pate at room temperature (200C). By what fraction (Dr/r) will the hole be larger when the plate is heated to 1500C? فرقان عادل منشد فر. . . (11)…RTI The molecules in a six-particle gas have velocities ₁ (201-30j) m/s V2 (10i+60j) m/s 73=(-501 +20j) m/s 7= 30i m/s Vs (40i-40j) m/s ₁=(-50 i 10j) m/s Calculate Varg Express the x and y components of the velocity in meters per second separated by a comma. Uz avg, Uy avg Submit Part B VD|| ΑΣΦ Request Answer W Calculate Davg- Express your answer with the appropriate units. ? m/s
- A copper sphere cools from 620C and 500C in ten minutes and to 420C in the next ten minutes. Calculate the temperature of the surroundings. What is the temperature of the body at the end of next eight minutes?1. (a) What is y if v = 0.250c? (b) If v = 0.500c?If AT C is the temperature difference of an object, then its value in kelvin will be, O a. ATC- 273 of O b. AT C +273 stion O C (AT°C *1.8) + 32 O d. same as the value is Celsius Electromagnetic waves are produced by An accelerated charge Ton O b. A static charge Oc Charged particles d. Charge moving with uniform velocity
