The Mach number of an aircraft that travels with a speed of 260 m/s in air at 20° C while it undergoes the compressibility effect will be: (Use speed of sound in air at 0° C: 331 m/s) Select one: a. M= 0.69 b. M 0.70 C. M 0.76

The molecules in a six-particle gas have velocities v₁ = (20î - 30) m/s v₂ = (40î +90) m/s V3 = (-802 +205) m/s V4 = 30î m/s V5 (402-405) m/s = v₁ = (-50-403) m/s Part A Calculate Vavg- Express the x and y components of the velocity in meters per second separated by a comma. Uz avg, Uy avg 0,0 m/s Submit ✓ Correct Part B Previous Answers Calculate Vavg- Express your answer with the appropriate units. Vavg0 Submit μA 6 m S 2 Previous Answers Request Answer ? X Incorrect; Try Again; 5 attempts remaining

52. Assuming the +x-axis is horizontal to the right for the vectors given in the following figure, use the analytical method to find the following resultants: (a) 11.671+ 8.991. (b) 9.011-6.401. (c) D + F. (d) 5.651 + 1.013. (e) D-F. (0) A+ 2F. (9) C-2D + 3F, and (h) A - 4D + 2F. 1. B = 5.0 B 53° A = 10.0 30° A D C = 12.0 8 60° ILL 10 30° F = 20.0

Carbon dioxide gas, CO2, travels at about 340 m/s at room temperature. What is the travel rate (velocity) of helium, He, at the same temperature?

a) What is the magnitude of energy (in MJ) that must be removed to freeze 377 L of water with a density of  999.8 Kg/m3 that is already at 0˚C [round your final answer to one decimal place]? {latent heats of water: Lf = 33.5 × 104 J/kg, and Lv = 22.6 × 105 J/kg} b) The magnitude of energy that must be added to melt the same mass of ice (already at 0˚C) would be greater than the amount of energy that had to be removed in order to freeze it. TRUE OR FALSE {latent heats of water: Lf = 33.5 × 104 J/kg, and Lv = 22.6 × 105 J/kg}

The following information about solid materials is taken from the Science Data Book (Tennant, 1971): Material Aluminium Brass Copper Glass Iron Steel Tin Linear expansivity (K-1) 23 x 10-6 18 x 10-6 17 x 10-6 9 x 10-6 11 x 10-6 15 x 10-6 23 x 10-6 a) Write a word equation to explain the meaning of the term 'linear expansivity'. b) A glass fibre used in an optical cable is 50 m long. Calculate the increase in length of the fibre if the temperature rises from 0 °C to 20 °C. you have calculated in (b) would change for a glass fibre

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Nuclear scientists have determined that a fourth state of matter exists: plasma. The state of plasma is reached when matter acquires a temperature so high that some of the molecules and atoms are broken down into ions and electrons. Stellar and interstellar matter mostly occur as forms of plasma. On Earth, plasma exists in the ionosphere, in flames, and in chemical and nuclear explosions. Matter in a controlled thermonuclear reactor also exists in a plasma state. Plasma is most like a gas. However, it differs from un-ionized gas in that it is a good conductor of electricity and heat. Scientists hope to understand the occurrence of plasma in nature and to harness it as an inexpensive energy source. 26. Based on the passage, how can the cost of developing thermonuclear power with plasma be defended? A. It is applicable to all technologies. B. A plasma power source can be used without special equipment. C. It can provide an inexpensive power source. bagga bniy D. It is almost perfected…

How much energy (in MJ) is needed to raise the temperature of 0.234 m3 of water from 15.1˚C to 76.2˚C [round your final answer to one decimal place]?   {specific heat of water = 4,180 J/(kg∙˚C); density of water = 990.1 Kg/m3}