# tammy

Popular questions and responses by tammy
1. ## Physics

you lift a 10 N physics book up in the air a distance of 1m at a constant velocity of .5m/s. What is the work done by the weight of the book? a) +10 J b)-10 J c) +5 J d)-5 J 10 N is the force of gravity and to find work you do this: W=F_g(change in

2. ## Physics

An ideal massless spring is fixed to the wall at one end. A block of mass M attached to the other end of the spring oscillates with amplitude A on a frictionless, horizontal surface. The maximum speed of the block is V_m. The force constant of the spring

3. ## Physics

A stone is thrown straight up. At the top of the path, the net force acting on it is (ignore air resistance) a) greater than its weight b) greater than zero, but less than its weight c) instantaneously equal to zero d) equal to its weight At the very top

4. ## Physics

A spring has a force constant of 100N/m and an unstretched lenght of .07 m. One end is attached to a post that is free to rotate in the center of a smooth table. The other end is attatched to a 1 kg disc moving in uniform circular motion on the table,

5. ## math

random sample of size 36 is taken from a population with mean 50 and standard deviation 5. Find P( x¯ < 51.5).

6. ## algebra

The denominator of a fraction is 3 more than twice the numerator. If both the numerator and denominator are decreased by 7 and the simplified result is 7/19 find the original fraction

7. ## Science

A golf ball and a ping-pong ball are dropped in a vacuum chamber. When they have fallen halfway down, they have the same... A.speed B.potential energy C.kinetic energy D.Rest Energy my thought is that its c, kinetic energy...but i'm not 100% sure

8. ## Middle Math

My math calculator prompted me with this question 6E-7. My answer to this question is 0.00000007

9. ## Chemistry

Write an equation for the reaction that takes place when each base is added to water. A) LiOH B) (CH3)2NH.

10. ## Physics

A wheel with rotational inertia I is mounted on a fixed, fricitonless axle. The angular speed w of the wheel is inccreased from zero to w_f in a time interval T. 1: What is the average net torque on the wheel during the time interval, T? a) w_f/T b)w_f/T^2

11. ## physics

A solid object floats with three-fourths of its volume beneath the surface of eater. What is the object's density? Give answers in g/cm^3. p_o=? p_object/p_water = v_water/v_object p_o/(1 g/cm^3) = ? for the volume side would it be 3/4 so that p_o/(1

12. ## Logic

Mrs. Orlof teaches two history classes, one in the morning and one in the afternoon. Yesterday she gave the same test to both classes. Anyone who failed the test must take a retest. Since a greater percentage of students who took the morning test failed

13. ## physics

How much absolute (total) pressure must a submarine withstand at a depth of 120m in the lake. Give answer in kPa. (Use 10m/s^2 for g). h=120m p_water = 1 g/cm^3 = 1000 kg/m^3 p_atmosphere = 101.3kPa P_total = ? P_water =density *g*h =1000*10*120 =1200000Pa

14. ## Physics

A plane flying horizontally at a speed of 50m/s and at an elevation of 160m drops a package. two seconds later it drops a second package. How far apart will the two packages land on the ground? a)100m b)162m c)177m d)283m i think the answer is a) I got

15. ## Physics

Suppose that a car traveling to the West (-x direction) begins to slow down as it approaches a traffic light. make a statement concerning its acceleration. a) the car is decelerating and its acceleration is positive b)the car is decelerating and its

16. ## O Chemistry

In the reaction p-aminophenol + acetic anhydride --> acetaminophen , 4.5 ml of water is added into the flask with the p-aminophenol and acetic anhydride at the beginning of the experiment. What is the purpose of this water?

17. ## Organic chemistry

What are two reasons why the crude product in most reactions is not pure?

18. ## Math

What did the baby buzzard say when it saw an orange in the nest I got misspelled jumbo

19. ## Math- Statistics

A random sample of size 36 is to be selected from a population that has a mean μ = 50 and a standard deviation σ of 10. * a. This sample of 36 has a mean value of , which belongs to a sampling distribution. Find the shape of this sampling distribution. *

20. ## Physics

A ball is tossed straight up from the surface of a small spherical asteroid with no atmosphere. The ball goes to a height ewual to the asteroid's radius and then falls straight down towardd the surface of the asteroid. What forces if any act on the ball

21. ## Math

Chelsea had made six of seventeen free-throw attempts. How many consecutive free throws must she make to raise her percentage of free throws made to exactly 50 percent?

22. ## Chemistry

How many carbon atoms are there in a diamond (pure carbon) with a mass of 50 ?

23. ## chemistry

How many moles of gas must be forced into a 5.0 L tire to give it a gauge pressure of 33.6 psi at 28 ∘C? The gauge pressure is relative to atmospheric pressure. Assume that atmospheric pressure is 14.8 psi so that the total pressure in the tire is 48.4

24. ## science

Object A and B both start at rest. They both accelerate at the same rate. However , object A accelerates for twice the time as object B. What is the distance traveled by object A compared to that of object B? a) the same distance B) twice as far c) three

25. ## Physics

When a block slides a certain distance down an incline the work done by gravity is 300 J. What is the work done by gravity if this block slides the same distance up the incline? a) 300 J b) zero c) -300 J d) It cannot be determined without knowing the

26. ## chemistry

After the precipitation of the Group I cations as chlorides by the reaction with HCl, nearly all of the precipitate dissolves in hot water. Which ion(s) are present? Which ion(s) are absent?

27. ## Physics

Two chunks of ice are sliding on a frictionless frozen pond. Chunk A, with a mass ma= 5.0 kg, moves with initial velocity va1= 2.0 m/s parallel to the x-axis. It collides with chunk b, which has a mass mb= 3.0 kg and is initially at rest. After the

28. ## stat

smith is a weld inspector at a ship yard. he knows from keeping track of good and substandard welds that for the afternoon shift 5% of all welds done will be substandard. If smith checks 300 of the 7500 welds completed that shift, what is the probability

29. ## Math

How you can quickly calculate the mean of the following test scores without adding the numbers. 76,73,78,75

30. ## Psychology

Star and her brother, Mike, produce roughly the same levels of male hormones and female hormones. Given this information, it is likely that: Answer Star and Mike have not yet reached puberty. Star has reached puberty but Mike has not. Mike has reached

31. ## Sociology

What does the author think best explains the number of lower-class offenders in the criminal justice system? a) They have higher offending rates. b) They have higher rates of recidivism. c) There are both disparities in crime rates and discrimination in

32. ## science

A ball of mass m is attached by two strings to a vertical rod. as shown above. The entire system rotates at constant angular velocity about the axis of the rod. a)Assuming is large enough to keep both strings taut, find the force each string exerts on the

33. ## Biology

Cellular Respiration and Photosynthesis co-exist as paired metabolic processes. Photosynthesis uses light energy to convert carbon dioxide into glucose, a simple sugar, in two steps, the light dependent and light independent reactions. Oxygen is produced

34. ## physics

A rectangular box of negligible mass measures 5m by 1m by .5m. How many kgs of mass can be loaded onto the box before it sinks in the water? V=5*1*.5 = 2.5m^3 density of water =1g/cm^3 =1000 kg/m^3 I also know that when the density of the mass is greater

35. ## Chemistry

I am completely lost in chemistry. Everything the teacher says sounds like a different language to me and I am usually really good in the class. Can someone help me do this problem please? An element "E" is present as 10E (The 10 is like an exponent to the

36. ## Math

On a map scale is shown is 1 inch equals 5 miles. If an island is 2.5 in.² on the map what is the actual area of the island

37. ## chemistry

How many joules of heat are removed to completely covert 70.0 grams of water to ice at zero Celcius?

38. ## Chemistry

consider the reaction at 298K. 2H2S(eq) + SO2-----3S(s) + 2H2O (g). Calculate Grxn under these conditions. PH2S=2atm Pso2 =1.5 atm PH2O + 0.01atm

39. ## algebra

A 24 meters pole is held by a three guy wire into vertical position. Two of the guy wires are of equal length. The third wire is 5 meters longer than the other two and is attached to the ground 11 meters farther from the foot of the pole than the two equal

40. ## math

Emily spent 1/2 of her money at the grocery store. Then, she spent 1/2 of what was left at the baker. Next she spent 1/2 of what was left on a cd. She spent the remaining \$6.00 on lunch. How much money did she start with ?

41. ## Physics

A 0.5 kg air-hockey puck is initially at rest. What will its kinetic energy be after a net force of 0.8 N acts on it for a distance of 0.5 m?

42. ## Intro to Healthcare Statistics

Discuss how statistics are generated and how statistical information is used by healthcare organizations. Explore the NC State Center for Health Statistics at the following website and discuss at least two types of statistic health information that NC

43. ## cist1305

third edition exercise 2 an object oriented approch to programming logic and design

44. ## Sociology

Which statement would Kennedy’s New York City “pedestrian stop” analysis most likely echo? a) Descriptions of crime suspects dictate who the police stop. b) The race of crime suspects dictates who the police stop. c) Witnesses to crime tend to be

45. ## Algebra

Use symbols to write the expression and then evaluate it Thirty six squared divided by six cubed The given expression symbol is? Evaluate it

46. ## algebra

If a baseball player hits a homerun and runs the bases, what is his displacement?

47. ## history

what were vietcong hideouts?

48. ## Math

From an 8 inch by 10 inch rectangular sheet of paper, squares of equal size will be cut from each corner. The flaps will then be folded up to form an open-topped box. Find the maximum possible volume of the box.

49. ## Math

Use the distributive property to rewrite this expression, then simplify the new expression if possible; -4(z+3)

50. ## Algebra

write a numerical expression for the phrase & simplify 129 less than -34

51. ## Science

Calculate how much 95% ethyl alcohol will be required to dissolve 075g sulfanilamide at 78 degree Celsius. Knowing that solubility of sulfanilamide is 210 mg/ml at 78 degree Celsius, 14mg/ml at 0 Degree Celsius.

52. ## math 116

The average speed, s, was between 110 and 120 mph. translate to a inequality

53. ## statistics

A consumer magazine has contacted a simple random sample of 33 owners of a certain model of automobile and asked each owner how many defects had to be corrected with in the first 2 months of ownership. The average number of defects was x with (with line

54. ## Social

How similar or dissimilar are the experiences of U.S. minorities today? Does the difference in French and U.S. citizenship laws have any impact on the acceptance and integration of minorities into society? How so? I have had such a hard time finding any

55. ## physics

Which of the following statements is not true? a)the horizontal component of velocity cannot be larger than the total velocity b)the vertical component of velocity cannot be larger than the total velocity c)Neither horizontal nor vertical components of

56. ## Algebra II

Bolivian coffee sells for \$4.59 per pound, and Columbian coffee sells for \$5.95 per pound. How many pounds of each coffee should be mixed to produce 4000 pounds of a mixture that will be sold for \$5.10 per pound? I think this is a system of equations but

57. ## Physics

An example of a force which acts at a distance is a) tension b) weight c) friction d) normal force Isn't the answer c) the further an object goes the more resistance?

58. ## Physics

When a football in a field goal attemp reaches its max height how does its speed compare to its inital speed? a)it's zero b) it is less than its inital speed c)it is equal to its inital speed d)it is greater than its inital speed since at the max height

59. ## Physics

A car starts from rest and accelerates at 5m/s^2 for 4s, then maintains that velocity for 3 seconds and then decelerates to a rate of 2m/s^2 for 3 seconds. How far does the car travel? I would have to add the total distance throughout the trip. And to find

60. ## Physics

Which of the following is an accurate statement? a) a vector cannot have zero magnitude if one of its components is not zero b) the magnitude of a vector can be less than the magnitude of one of its componenets c) if the magnitude of vector A is less than

61. ## Physics

When is the average velocity of an object equal to the instantaneous velocity? a) always b)never c) only when velocity is constant d)only when velocity is increasing at a constant rate c) would be the answer since you could cross out a). I do know that

62. ## science

An average human heart rate is 70 beats per minute. How many times it beats over 70 year lifetime? use scientific notation. 365 = the number of days in a year 70 years /1 * 365 days / year = 25,550 25,550/1 * 24 hours/ day = 613,200 613,200/1 * 60 minutes/

63. ## ALGEBRA

Find all positive values for k for which each of the following can be factored. I have 2 problems i think i got the one right but not sure the second one i have no idea where to even start 2x^3+16x^2-40x=2x(x^2+8x-20) (x-2)(x+10)=8x this one i am stumped

64. ## Math

What is the relationship between the point (4,7) and the vector (4,7)? Illustrate with a sketch.

65. ## Chemistry

Human blood contains glucose at a typical concentration of 0.100% (W/V). At this concentration, how many grams of glucose would be found in one liter of human blood?

66. ## Math

Let f(x)= -3x+4 and g(x)= -x^2 +4x+1. Find and simplify g(k)

67. ## Math

Give an example of a function from everyday life.(fill in blanks):______ depends on_____, so _____is a function of _______.

68. ## Math

Simplify each expression. Sqrt of 128m^3n^5/sqrt of 81mn^7

69. ## science

I'm doing a lab for Le Chatelier's Principle. I'm concerned that all my answers sound very similar. Can someone help me and let me know if my answers are making sense? ~Thanks 1.) How is the reaction Zn(OH)2 Zn^+2 + 2OH- affected by adding OH- I think

70. ## Intro to Chemistry

When calcium carbonate is added to hydrochloric acid, calcium chloride, carbon dioxide, and water are produced. CaCO3(s)+2HCl(aq)=CaCl2(aq)+H2O(l)+CO2(g) How many grams of calcium chloride will be produced when 27.0 g of calcium carbonate are combined with

5pi over 4

72. ## Biology

How many calories are required to heat 10 ml of water from 25 degrees Celsius to 35 degrees Celsius?

73. ## personal finance

If you believe that a firm will grow rapidly in the future, you should buy its? a. common stock b. notes c.preferred stock d. notes

74. ## Texas Southern University

In a respresentative study,a sample of n = 100 adolescents with a history of group participation is given a standardized self-esteem questionnaire. For the general po;ulation of adolescents, scores on this questionnaire form a normal distribution with a

75. ## History

Which of the following was Eisenhower's most significant legislative achievement? A. The Highway Act of 1956 B. The establishment of modern Republicanism C. The extension of Social Security benefits D. Increasing the minimum wage

76. ## English

Which of the following statements about literary movements is not true?

Three of every seven sales transactions at Dollar Discount are on credit cards. What percent of the transactions are NOT credit card sales? (Round percentages to the nearest tenth.)

78. ## Math

In a group of 37 children, 14 had a dog, 20 had a cat, and 12 had both a dog and a cat. How many children had neither a dog nor a cat as a pet? 23 8 35 15 Is the answer 15? I think it is 15

79. ## Math-Algebra

The area of a rectangle is represented by 5x^2+19x+12. What is the length?

80. ## Math-Geometry

I have to calcualte the volume of a cone. The height is 2.1 ft, and the base is 2 inches. I keep coming up with the answer of 8.792 cu ft. There is 4 choice answers given: 0.061 ft,0.610 ft,6.125 ft and 2.016 ft. I have tried several calculators, none of

81. ## Science

How many grams of oxygen gas would be needed to react with 75 grams of hydrogen gas

82. ## PHYSICS

A bicycle is turned upside down while its owner repairs a flat tire. A friend spins the other wheel and observes that drops of water fly off tangentially. She measures the heights reached by drops moving vertically (see figure). A drop that breaks loose

83. ## Inductively

how do you do reason inductively evaluate (1)50 explain reasoning?

84. ## chemistry

how many cars are there in a long freight train, if it takes the entire train 2.30 minutes to pass a station at 45mph? each car is 40 ft long.there are 5280.0 feet in a mile.

85. ## College math

1.Find the height to the nearest foot of a tree that makes a 50-foot shadow when a 2 ft. 6 in. pole is used to make a shadow of 3 feet.

86. ## algebra

(72÷(-4)+3(-4))/(5-(-5))

87. ## algebra

(72÷(-4)+3(-4))/(5-(-5))

88. ## algebra

(72÷(-4)+3(-4))/(5-(-5))

89. ## History

Why was it so difficult for Great Britain to control the New England colonies?

90. ## Algebra

Find the area of a rectangle heating-duct grill having a length of 2yd and a width of 17/4yd

91. ## Algebra

What is the equation for finding the revenue if you have a pizza selling for \$15.00, total cost of \$55.00 and labor is \$4.00.

92. ## algebra

The length of an altitude of a triangle is 1/3 the length of the side to which it is drawn. If the area is 6 square cm., then what is the length of the altitude?

93. ## Analytical Chemistry

When BaCl2-H2O (s) is dried in an oven, it loses gaseious water: BaCl2-H2O BaCl2(s) + H2O (g) enthalpy change - 63.11 kJ/mol at 25 degrees C entropy change - +148 J/(K-mol) at 25 degrees C Calculate the vapor pressure of gaseous H2O above BaCl2-H2O at

94. ## Organic Chemistry

What would happen to the caffeine if the sublimation step were performed at atmospheric pressure?

95. ## chemistry

Which one of the gollowing represents the theoretical yield, in grams, of precipitate for the double displacement reaction if 25.0 mL of 1.75 M aqueous calcium nitrate is added to 15.0 mL of 1.50 M sodium phosphate?

96. ## Algebra

Divide: (25b^3+5b^2+34b+29)/(5b+3)

98. ## Principle of Accounting

t is stand accounting procedures, or GAAP, to make an adjusting entry to remove the current year�s principle from the long-term liabilities. This entry reduces the long-term liabilities and increases the current liabilities. You are the bookkeeper for