Numerade

Questions asked

BEST MATCH

11. A 65.0-kg crate is pulled across the floor by a horizontal rope with tension 275 N, starting from rest, resulting in displacement of 12.0 m. The coefficient of kinetic friction between the crate and the floor is 0.350. (a) Calculate the work done by the force of tension (b) Calculate the work done by the force of friction $F_k = \mu_k N = (0.350)(275) = 96.25 N$ (c) Calculate the net work done on the crate (d) Calculate the kinetic energy of the crate after it has been moved by 12m $\frac{(65.0)(12)^2}{2} = 4.68 \times 10^3 N$ 12. (a) Calculate the stopping distance of a 1200-kg car initially moving at 22 m/s if it skids to a stop on a dry road that has a coefficient of kinetic friction 0.90 with the tires. $W_{net} = \Delta KE$ $\frac{1200}{(22)(0.90)} = 49.1 m$ $v_f^2 = v_i^2 + 2a\Delta x$ (b) What would be the stopping distance on a wet road, if the coefficient of kinetic friction is reduced to 0.30? $W_{net} = \Delta KE$ $\frac{1200}{(22)(0.30)} = 16.4 m$

View Answer

BEST MATCH

1. Define Molecular Biology and its significance in human health and diseases. 2. Name the scientists who discovered i) Microscope, ii) a Cell, iii) Nucleus, and iv) Chromosomes. 3. In 2-3 sentences, describe the significance of Mendel's work that laid the foundation for major areas of biology such as genetics and molecular biology. 4. Describe in 2-3 sentences how the work of Thomas Morgan on flies supported Mendel's work. 5. In 2-3 sentences, describe the contribution of the following scientists towards discerning the structure of DNA: i) Griffith, ii) Avery, McLeod, and McCarty, iii) Hershey and Chase, iv) Linus Pauling, v) Maurice Wilkins and Rosalind Franklin, vi) Meselson and Stahl. 6. How did the research work of Rosalind Franklin help Watson and Crick propose their model of DNA structure? What technique did she use? 7. What is Chargaff's rule? What will be the percentage of Guanine if Adenine is 14% in the total genome of a newly discovered organism? 8. What will be the percentage of Guanine if Adenine is 28% in the total genome? 9. Name the molecules that constitute a nucleotide monomer. 10. What is the difference between a deoxyribose sugar and a ribose sugar? Draw their structures respectively. 11. What is the role of a phosphate molecule in DNA? How does this property of DNA help in agarose gel electrophoresis? 12. What is a phosphodiester bond and which carbon atoms does it involve? 13. Which radioactive atom was used to prove that DNA replicates in a semi-conservative fashion? 14. Which radioactive atoms were used to prove that DNA is the molecule responsible for mediating the pathogenicity of bacteriophages? 15. Define Major and Minor Grooves in the structure of DNA. 16. How many bases constitute one turn in B, A, and Z DNA? 17. What is the distance between two consecutive bases in DNA? 18. How many bases are present in one turn of the DNA helix? 19. How many minimum amounts of turn could be expected in a DNA molecule if the length is 180 base pairs? 20. What is the diameter of B DNA? 21. Draw chemical structures of nucleotides A and T, as well as G and C, showing the double (A=T) and triple (G=C) hydrogen bonds.

View Answer

BEST MATCH

The figure gives the probability distribution for nitrogen gas. The scale of the horizontal axis is set by $v_s = 1140$ m/s. What are the (a) gas temperature and (b) rms speed of the molecules?

View Answer

BEST MATCH

The upper surface of a 75-cm-thick solid plate ($k = 237 \text{ W/m K}$) is being cooled by water with temperature of 20°C. The upper and lower surfaces of the solid plate maintained at constant temperatures of 60°C and 120°C, respectively. Given. The thermal conductivity of the solid plate is given as $k = 237 \text{ W/m-K}$. The thermal conductivity of water at the film temperature of $T_f = \frac{(60°C - 20°C)}{2} = 40°C$ is $k_{fluid} = 0.631 \text{ W/m-K}$. 2. value 10.00 points Determine the water temperature gradient at the upper plate surface. The water temperature gradient at the upper plate surface is -45071 K/m.

View Answer

BEST MATCH

a) How can you tell which mechanism will cause a slender column to fail under compressive load (how to tell if it will fail by buckling or yielding)? b) Give one of the factors/questions used to calculate the \"RPN\" in the DFMEA (not your responses, but there were 3 questions - do you recall one or more?). c) If a helical spring is produced using a ductile material, and it is loaded in compression with a force that varies in magnitude over time (small force, then a larger one, then a small one again, etc) can you apply VonMises criteria to determine if failure is likely? (explain not just yes/no) d) If one wishes to calculate wear rate or total wear, what information is needed?

View Answer

BEST MATCH

Using the clipper circuit shown. Plot the Vo using an input of $V_p = 6$ V for the following cases: (100 points) a. Ideal diode b. All diodes are germanium

View Answer

BEST MATCH

Q2. Using the following financial statements for Pamplin Inc.: (8 Points) BALANCE SHEET FOR YEAR 2012 and 2013 ('000 $) ASSETS Cash $ 200 $ 150 Account Receivable 450 425 Inventory 550 625 Current Asset 1,200 1,200 Plant and Equipment 2,200 2,600 Less: Accumulated Depreciation (1.000) (1.200) Net Plant and Equipment 1,200 1,400 Total Assets 2,400 2,600 LIABILITIES AND OWNERS EQUITY Accounts Payable 200 150 Notes Payable-current 9% 0 150 Currents liabilities 200 300 Bonds (8 1/3% interest) 600 600 Owners Equity Common Stock 300 300 Paid-in capital 600 600 Retained earnings 700 800 Total owners' equity 1,600 1,700 Total Liab. and owners' equity 2,400 2,600 Income Statement for Year 2012 and 2013 ('000 $) Sales (All credit) 1,200 1,450 COGS 700 850 Gross Profit 500 600

View Answer

BEST MATCH

Calculate the annual rate of change in credit card balances between the end of 2019 and the end of Quarter 1 2021. Provide your comments on the potential causes of this change. 19:Q1 - 0.85 19:Q2 - 0.87 19:Q3 - 0.88 19:Q4 - 0.93 20:Q1 - 0.89 20:Q2 - 0.82 20:Q3 - 0.81 20:Q4 - 0.82 21:Q1 - 0.77

View Answer

BEST MATCH

1. If the given is on a 12-hour time format, convert it into a 24-hour time format and vice versa. 1. 15:40 6. 8:30 p.m. 11. 1:25 a.m. 16. 21:30 2. 6:20 a.m. 7. 4:30 p.m. 12. 19:25 17. 23:20 3. 17:15 8. 21:45 13. 11:20 p.m. 18. 9:15 a.m 4. 6:10 a.m. 9. 5:55 p.m. 14. 18:15 19. 20:12 5. 7:25 a.m. 10. 10:40 p.m. 15. 21:55 20. 16:30

View Answer

BEST MATCH

In a class of 75 students, 8% ended the class with an A. How many students received A's? 06 09 08 3

View Answer

diana j.