Did the mass of the flask and the air inside change? (i.e. is there a difference between M1 and M3)? Explain this result given Mass of flask with air: M1 = 318.73g Mass of heated flask with air: M3= 318.60g *What would you expect if you compared the evacuated flask, Mass of flask without air: M2= 317.64g, at the two different temperatures?

Additional Problem 5 For what uniform rate in r/min about axis C will the take U-tube the configuration shown? The fluid is mercury at 20°C. Ans: = 138.12 rpm 20 cm -Jª 10 cm 5 cm- B 12 cm

The density of a ring that may be silver, platinum, or a white gold alloy is being measured. Its mass under dry conditions is 4.29 g. In water at 20 °C having a density of 0.998 g/cm³, the mass is found to be 4.09 g. Think & Prepare 1. To find the density of an object you need its mass and volume. How can you accurately determine the volume of the ring? 2. How can you use the weightloss of the ring in water to determine the volume of the ring? What is the density of the ring? ✓ g/cm³ For comparison with the final answer (no need to enter an answer for this comparison), density of gold = 19.3 g/cm³ density of platinum = 21.45 g/cm³ density of silver = 10.49 g/cm³ density range of alloy = 14.7 g/cm³ to 16.9 g/cm³

T00005/ruliscreen 12000703/View McGraw-Hill Campus - ALEKS Science O GASES Interconverting pressure and force A cylinder measuring 5.2 cm wide and 6.2 cm high is filled with gas. The piston is pushed down with a steady force measured to be 24. N. piston cylinder gas Calculate the pressure of the gas insids the cylinder. Write your answer in units of kilopascals. Round your answe to 2 significant digits. kPa Explanation Check 62021 McGraw-Hill Education. All Rights Reserved Terms of Use étv A FEB 28

Search topics and skills Welcom Learning Diagnostic Analytics Recommendations Skill plans Math LO Language arts Science TX Standards Sixth grade * J.1 How does particle motion affect temperature? XU5 A substance has a higher temperature when its particles have a higher average kinetic energy. Imagine two different substances that are both pure, meaning they each contain only one type of matter. Each substance has a different temperature. Which two properties determine which substance has the higher temperature? the mass of each substance the mass of one particle in each substance the kinetic energy of the fastest particle in each substance the average speed of the particles in each substance Submit

Q3. Péclet number - We've seen the Péclet number Pé vl as a useful metric to D determine if stirring (Pé > 1) is more efficient than diffusion (Pé < 1) for mixing solutions. "Stirring" here can designate any process which applies a force on the molecules, resulting in a velocity v. a) Show that the Péclet number, like the Reynolds number, is unitless. Let's think about why scale (f) matters for mixing. 2-DNA, a DNA polymer containing 48,502 base pairs, has a diffusion coefficient of D field of 1 V/m, we can expect 1-DNA to reach a terminal velocity of 30 nm/s. 6.4 × 10-13m²s¬1. Under an electric b) Find the Péclet number for a system of dimension of e = 10 cm. This corresponds to the scale of most benchtop instruments used to manipulate or separate biomolecules. c) Find the Péclet number for a system of dimension of e to the scale over which most cellular processes occur. d) Find the scale l for which diffusion is just as efficient as electric field for displacing = 10 µm. This…

help please. Water in a hose with an area of 153 mm2 moves at 4 m/s, but then you cover part of the opening of the hose with your finger, and the water shoots out faster at 16 m/s . Find the area of the opening between your finger and the end of the hose in mm2. Note: you can leave the areas in mm2 since they'll cancel out.

Name Chapter 20 Gases Boyle's Law A movable piston encloses 0.78 m³ of gas in a cylinder. The piston is then pushed downward, changing the volume of the gas to 0.36 m³ and the pressure to 2.8 kPa. What was the original pressure of the gas? 1. Read and Understand What information are you given? initial volume of the piston = V₁ = 0.78 m³ final volume of the piston = V₂ = 0.36 m³ final pressure of the piston = P2 = 2.8 kPa 2. Plan and Solve What unknown are you trying to calculate? original pressure of the piston = P₁ What mathematical equation can you use to calculate the unknown? Boyle's law: P₁V₁= P₂V₂ Rearrange the equation to solve for the unknown variable. P₂V₂ P₁₂₁= Substitute the values you know into the equation. (2.8 kPa) (0.36 m³) 0.78 m³ P₁ = e8 to enolisoit = 1.3 kPa of Woled surgit odi 3. Look Back and Check Is your answer reasonable? Yes, the final pressure, 2.8 kPa, is about twice the original pressure, 1.3 kPa. Origirst grwollo obsmot Math Practice On a separate sheet of…

A gas at a fixed volume had a temperature change from 187.00 K to 65.25 K. At 65.25 K, the pressure was recorded as 188 Pa. What was the initial pressure? *USE THE EQUATION FOR GAY-LUSAAC’S LAW