2-3. Determine the magnitude of the resultant force FR F₁+F₂ and its direction, measured counterclockwise from the positive x axis. ban 20 = y -30° fo sedmem, 37916-300 F₁ = 250 lb 45° X F2 = 375 lb ybosadi bes 20E = 066
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- Check Your Understanding Figure 1.4 says the mass of the atmosphere is 1019kg . Assuming the density of the atmosphere is 1kg/m3 , estimate the height of Earth’s atmosphere. Do you think your answer is an underestimate or an overestimate? Explain why. How many piano tuners are there in New York City? How many leaves are on that tree? If you are studying photosynthesis or thinking of writing a smartphone app tot piano tuners, then the answers to these questions might be of great interest to you. Otherwise, you probably couldn’t care less what the answers are. However, these are exactly the soils of estimation problems that people in various tech industries have been asking potential employees to evaluate their quantitative reasoning skills. If building physical intuition and evaluating quantitative claims do not seem like sufficient reasons tot you to practice estimation problems, how about the fact that being good at them just might land you a high-paying job? For practice estimating relative lengths, areas, and volumes, check out this PhET (https://openstaxcollege.org/l/21lengthgame) simulation, titled “Estimation.”This was wrong. Can you solve this again with these numbers? What is the root mean square velocity, vrms, for Hydrogen molecules (H2) at 20oC? Hint: How many amu does an H2 molecule contain. 1 amu = 1.67 x 10-27 kg Boltzman's Constant, k = 1.38 x 10-23 J/K Give your answer in m/s to 4 significant figures (NO DECIMALS)Physics An average family of four uses roughly 1200 L (about 300 gallons) of water per day ( 1 L = 1000 cm³). How much depth would a lake lose per year if it uniformly covered an area of 20 km² and supplied a local town with a population of 50000 people? Consider only population uses, and neglect evaporation and so on. Express your answer using one significant figure. d= 195| ΑΣΦ ? cm/y
- (a) What is the coefficient of variation (CV)? Why do you study such variations? Explain using a real-life example.(b) Among the different measures of dispersion which one do you think is better and why?The following table gives the distribution of gas bills (GB’s) of some households (hhs) in a city- GB’s ($.’0) No. of hhs 375-450 41 450-525 95 525-600 31 600-675 61 675-750 19 (i) Calculate the ideal measures of dispersion.(ii) Make comments from your findings.I dont understand how to do this Using your FBD, derive an expression for tan θ in terms of FCoulomb and Fgravity, whereθ is half of the angle between the two pieces of tape at the apex of the tent shape. Hint:r is the length of the side of a right triangle opposite angle θ, and L is the hypotenuse ofthis triangle.1f: A-3)-J+K and B =1-3J +K calculate bhe veetos (ċ) sSo that Ā-B + Ĉsa
- EES CES Reconsider Prob. 1-62. Using EES (or other) software, plot the rate at which ice melts as a func- tion of the container thickness in the range of 0.1 cm to 1-63 1.0 cm. Discuss the results.S Can 6 PAR к Торс K Unit K In x K Moti = Cop K Unit S Spee S Topo S Math Micr eb.kamihq.com/web/viewer.html?source-filepicker&document_identifier=137VZR5BZOVSAIMOA55WU555_CvJ9NacO + 100 P e Interpreting Graphs Answer the questions following the graphs on each side Dietance va. Time 2 7 10 11 12 13 14 Time in soconds 1. From 1 second to 2 seconds, how fast is the object traveling. (Take the difference in distance and divide it by the time in between the 2 distances) 2. Is the object going as fast between 9 and 12 seconds as it is between 1 and 4 seconds? How can you tell? 3. What is the motion of the object between 4 and 6 seconds? acerConvert 1.050 g/cm3into base SI units. Express your answer in scientificnotation with the correct number of significant figures.
- When you are swimming at the bottom of a pool, the water above and around you exerts force on your eardrum. Calculate the force (in N) exerted on your eardrum when you are at the bottom of a pool that is 5.0 m deep. Assume that the area of your eardrum is 1 cm^2 and the density of water is 1000 kg/m^3 (10,000 cm^2 = 1m^2) (Ans: 5N) To solve this, which of the following equation/s should you use (check as many that best applies) O Q = mL O F1_ F2 A1 A2 O F=ma O A1V1= A2V2 O fEdA = denc €0 Ο ΔL αLo Δ . O du = dQ - dW or AU= Q- W O PV = nRT Pz +pgh2 + pv=P1+pgh1+ F Op= O as-S O P= pgh O e=! Tc 1- Tn Ow-ov V2 W = O Fp = P fluidgV submerged Op =m/V F = 4πεο O Tk = T+273.15KFigure E1.28 y В (15.0 m) D (10.0 m) 30.0° 53.00 25.0° Č (12.0 m) A (8.00 m) d. Solve for A • C and C• Ā.can you pls answer it step by step? the answer should be Q=-6150 J but idk how. thank you