2. จงแสดงวิธีรวมแรงและหาค่าแรงลัพธ์รวม ดังรูป คําตอบ: F =.. 25 N 135% ช่ 10 N 15 N N Oามุม............. 0 เทียบกับแกน X

0. The coffee's temperature is changing at a rate of r (t) = -8(0.8')'C per minute, with t in minutes. Estimate the coffee's temperature A cup of coffee at 90 C is put into a 20°C room when t = 10. when t Round your answer to two decimal places.

QUESTION 15 The volume of an automobile tire is 2.5 x 10 m3, the pressure of the air in the tire is 2.5 atm and the temperature is 25C . what is is the mass of air in grams ? The mean molecular mass of air is 29g. 1 atm = 1.01 x 105 Pa Calculate to 2 decimals. Chck Save and Submit 10 soee and submit. Click Save AL Answers to save all answers. Save All Answe 76 F Clear

1. Determine the following products using the correct sign: 1.11. 1.2J.=... 1.3 jxk.. 1.4xk..

Consider an ideal gas with an absolute temperature of ?1.T1. To what temperature would the gas need to be heated to double its pressure? Express the answer in terms of ?1.T1. ?2=   Consider an ideal gas with a volume of ?1.V1. To what volume would the gas need to be compressed to double its pressure? Express the answer in terms of ?1.V1. ?2=V2=

Calculate the volume of a container that holds 0.5 mole of an ideal gas at standard temperature and pressure. A. 0.0224 L B. 0.0112 L С. 12.4 L D. 224.0 L O A. В. С. D.

5. The speed of sound v (in m/s) is v= 331, T where T is the temperature (in K). If the 273 temperature is 303 K and is rising at 20.2 K/hr, how fast is the speed of sound rising? Hint: Use differentials.

1. To determine the density of a rectangular metal bar, Nadine-dong made the following measurements:length of 2.4 dm; width of 8.53 cm; height of 10 mm; mass of 3.6074 g. Calculate the density of themetal in kg/m3.                                                                                                                                                                2. The speed of sound in air at 313 K is about 354.94 m/s. Calculate this speed in miles per hour.3. Caffeine is a substance whose aroma can be detected by the human nose in the smallest amount. Thethreshold limit is 4.3 × 10^-11 grams per liter of air. If the current price of 25 g of caffeine is PhP 18.1,determine the cost (in PhP) to supply enough vanillin so that the aroma could be detected in a largeaircraft hangar with a volume of 3.0 × 10^8 ft^3.

6. A container filled with a sample of an ideal gas at the pressure of 1.5atm. The gas is compressed isothermally to one-fourth of its original volume. What is the new pressure of the gas?

The volume of an automobile tire is 2.5x10^-2m^3. The pressure of the air in the tire is 3.3 atm and the temperature is 25C°. What is the mass of air in grams? The mean molecular mass of air is 29g. Calculate to 2 decimals.