# Lisa

Questions and answers by visitors named Lisa

## Questions

1. ### How did Drs. Peter and Mary Grant verify Darwin’s theory of natural selection?(1 point)

by studying a different group of organisms by assessing changes in another animal trait by finding new species that adapted to a different environment by making

How are the governments of jordan and kuwait different from the governments of the united Arab Emirates and oman? A. Citizens of jordan and kuwait can vote. B. Jordan and kuwait have monarchs**** C. The king of jordan and emir of

4. ### What is 66 2/3% of 891?

PLEASE show me the steps on how you got the answer to this question...

6. ### 38. Which of the following sentences contains a helping verb? (1 point)

Eduardo looked in the basement, but the puppy wasn’t there. Sakkom hung wind chimes because she loves the sound. Roger has never performed a solo in his life. The leader of the troop

7. ### How much heat, in kilojoules, is associated with the production of 273kg of slaked lime, Ca(OH)2?

CaO(s)+H2O(l)-->Ca(OH)2(s) delta H=-65.2kJ

8. ### Linear Functions Unit Portfolio

Directions: Complete each of the tasks outlined below. Cab companies often charge a flat fee for picking someone up and then charge an additional fee per mile driven. Pick a U.S. city and research the rates of two different

12. ### Animals break down glucose (C6H12O6) as a source of energy according to the following overall reaction.

C6H12O6(aq) + 6O2(g) �¨ 6CO2(g) + 6H2O(l) What mass in grams of CO2(g) is produced from the reaction of 15.0 g of glucose?

13. ### Consider the reaction.

4Fe(s) + 3O2(g) �¨ 2Fe2O3(s) If 0.500 mol of Fe reacts with 0.400 mol of O2, what are the limiting reactant and the theoretical yield in moles of Fe2O3 for the reaction, respectively?

17. ### Consider the following reaction that occurs when natural gas is burned.

CH4(g) + 2O2(g) �¨ CO2(g) + 2H2O(g) How many moles of water are produced when 6.2 mol of methane are burned? Assume that there is more than enough oxygen present.

19. ### 1. A 2.5 kg mass at rest on a horizontal surface is acted upon by an applied horizontal force of 150 N. A frictional force of 100 N acts on the mass. How much work is done on the mass?

my answer: would the work be 0? 2. When a rock is thrown straight up in

20. ### In a baseball a pitcher can accelerate a .15kg ball from rest to 98 mi/h in a distance of 1.7m

a) what is the average force exerted on a ball during a pitch? b)If the mass of the ball is increased, is the force required of the pitcher increased, decreased

21. ### Can someone please check my answers? How are the governments of Jordan and Kuwait different from the governments of the United Arab Emirates and Oman?

Citizens of Jordan and Kuwait can vote. B. Jordan and Kuwait have monarchs. C. The king of Jordan and emir

23. ### When x is increased by 5, the result is 60% of increasing x by 15. What is the value of x?

I got this far: x+5 = 0.60(x+15) x+5 = 0.60x + 9 x = 0.60x + 4 What is the next step?

24. ### 1. In moving an object of mass 10 kg through a distance of 8.0 m, 40 J of work is done. The average force exerted is?

my answer: 320N 2. What is the kinetic energy of a 20 kg object moving at a speed of 10 m/s? my answer: 1000J 3. the gravitational

25. ### If the mid-Atlantic Ocean is spreading at 3.0 cm per year, how many years has it taken for it to reach its present width of about 5000 km?

Express your answer to two significant figures and include the appropriate units.

26. ### Two fire wardens are stationed at locations A and B, which are 50 km apart. Each warden sights the forest fire at C. Given that angle CAB is 52 degrees and CBA is 43.0, find the distance from C to the nearer warden, to the nearest 0.1 km

1. Asthma is associated with environmental conditions. True 2. Only one-half of U.S. children with asthma follow their doctor's advice about medication. False 3. The percentage of overweight children has increased only marginally

29. ### Read the following line from "Not Waving but Drowning."

"Poor chap, he always loved larking And now he's dead" a. detached b. pleased c. objective d. critical NOT WAVING BUT DROWNING Stevie Smith Nobody heard him, the dead man, But still he lay moaning: I

30. ### If y is directly proportional to

x and y = 65 when x = 33, find y if x = 44 . (Round off your answer to the nearest hundredth.)

32. ### LOGIC and ARGUMENTS – the simple elements

Arguments are Composed of THREE PARTS: 1) Premises = basic, commonly accepted reasons – the “why’s,” and “how’s.” 2) Inferences = reasoned “guesses” or based assertions connecting conclusion to

34. ### 2NaN3(s)==>2Na(s) + 3N2(g)

How many liters of N2 are produced at STP if the air bag contains 114g of NaN3 ?

36. ### Which are structures in eukaryotic cells?

Select all that apply. mitochondria DNA nucleus plasmid

41. ### 10. David has a small business and is working on an Excel worksheet to help manage his inventory. David

realizes cell E14 has the wrong output. To check the problem, David should first select cell E14 and look at the _______ to check the formula. A. range

43. ### Ms. Sue Can You Help Me Answer This Question?

During the early 1800s, the United States tried to make peace with other countries in order to grow and develop. Give an example of one of these peace efforts and briefly explain what it hoped to accomplish.

45. ### 1. Which of the following best shows the transfer of heat by radiation?

my answer: c 2. Which of the following best shows the transfer of heat by convection? my answer: b 3. Water has specific heat of 4200 J per kilogram per degree celsius. This means that

46. ### Many dairy cows now receive injections of BST, a hormone intended to spur greater milk production. A group of 53 Jersey cows increased average milk production from 43 to 52 pounds per day, with a standard deviation of 4.8 lbs.

Is this evidence that the

49. ### For the following equilibrium system, which of the following changes will form more CaCO3?

CO2(g) + Ca(OH)2(s) <--> CaCO3(s) + H2O(l) deltaH(rxn) = -113 kJ My choices are: a) Decrease temperature at a constant pressure (no phase change) B) Increase volume

51. ### i'm having trouble calculating this. can someone help please?

A \$7,000, 4%, 120-day note, dated March 20, is discounted on July 15. Assuming a 3% discount rate, the bank discount is: a) \$1.74 b) \$1.77 c) \$7.11 d) \$17.68 e) None of these .

54. ### Hydrogen is generated by passing hot steam over iron, which oxidizes to form Fe3O4, in the following equation:

a. if 625 g of Fe3O4 is produced in the reaction, how many moles of hydrogen are produced at the same time? b. how many moles of iron would be

55. ### If there are 12 candidates in a city election. The winner will be the mayor and the runner up will be the vice mayor. How many different combinations of mayor and vice-mayor are possible?

Would it be 12P2 = 132 ? o:

56. ### How do you rename a fraction? Like

2/9 in eighteenths

59. ### Could you please explain this problem step by step, thank you!

You are planning to make an open rectangular box that will hold a volume of 50 cubed feet. What are the dimensions of the box with minimum surface area?

63. ### (x-8)(x-k) = x^2-5kx+m

In the equation above, k and m are constants. If the equation is true for all values of x, what is the value of m?

64. ### Consider the combustion of liquid methanol,

CH3OH (l) CH3OH (l) +3/2O2 (g) = CO2 (g) + 2H2O(l) H = -726.5 kJ What is for the reaction represented by this equation? Express your answer using four significant figures

70. ### -4x (little 2) =0

Not sure what name the technique means. I know this is a Quadratic Equation.

71. ### A customer wants to mail a package.

The postal clerk determines the cost of the package to be \$18.95, but only 6¢ and 9¢ stamps are available. Can the available stamps be used for the exact amount of postage for the package? Why or why not?

78. ### A circle is inside a square.

The radius of the circle is decreasing at a rate of 4 meters per day and the sides of the square are increasing at a rate of 2 meters per day. When the radius is 3 meters, and the sides are 19 meters, then how fast is the AREA

79. ### An inverted pyramid is being filled with water at a constant rate of 25 cubic centimeters per second. The pyramid, at the top, has the shape of a square with sides of length 6 cm, and the height is 9 cm.

Find the rate at which the water level is rising when

81. ### Show that ∑ ((log 𝑛)^𝑞/𝑛^𝑝)

converges for −∞ < 𝑞 < ∞ and 𝑝 > 1.

82. ### Show that ∑ ((log 𝑛)

𝑞 /𝑛 𝑝 ) ∞ 𝑛=2 converges for −∞ < 𝑞 < ∞ and 𝑝 > 1.

84. ### O is a dibasic acid H2X .G is a solution containing 1.00g of NaOH in 250cm³ solution.

1) calculate the concentration of G in mol/dm³ 2) calculate the concentration of O in mol /dm³ 3) molar mass of acid given that 100cm³ of O contains 0.485g of the acid

85. ### O is a dibasic acid H2X .G is a solution containing 1.00g of NaOH in 250cm³ solution.

1) calculate the concentration of G in mol/dm³ 2) calculate the concentration of O in mol /dm³ 3) molar mass of acid given that 100cm³ of O contains 0.485g of the acid

86. ### Hydrogen gas reactions with nitrogen to form ammonia according to the following chemical equation:

H2(g) + N2(g) --> NH3(g) How many grams of H2 are needed to produce 12.15 grams of NH3? (express your answer as numeric only with 3 significant digits)

99. ### A student performs the reaction below in three experiments studying initial concentrations and initial rates. The data is summarised in the table below. Show all your work.

2 NO(g) + Br2(g) → 2 NOBr(g) a. What is the order of this reaction with respect to