# confused

Popular questions and responses by confused
1. ## English

in which sentence is the underlined word the simple predicate? A. According to legend, THERE is buried treasure nearby. B. People with metal detectors SEARCH for it every weekend. C. So far, no treasure has BEEN found. D. Most treasure seekers leave here

2. ## Math

Is the product of 4/7 and radical 16 a rational or irrational number? Explain.

3. ## Physics

* At an accident scene on a level road, investigators measure a car's skid mark to be 58 m long. It was a rainy day and the coefficient of friction was estimated to be 0.38. Use these data to determine the speed of the car when the driver slammed on (and

4. ## college physics

a tennis ball is thrown straight up with an initial velocity of 22.5 m/s. it is caught at the same distance above the ground. a). how long does it take to reach its maximum height? b). how high does the ball rise? c). at what speed does it hit the ground?

5. ## physics

Henry hits a hockey puck in the positive x-direction at time, t ≈ t0. The puck is then stopped by a net starting at time, t ≈ t1. Which of the following curves could describe the acceleration of the hockey puck if we ignore any effects of friction? 1.

6. ## math

The 2 pulleys in the figure have radii of 15 cm and 8 cm, respectively. The larger pulley rotates 25 times in 36 seconds find the angular velocity of each pulley in radians per second. Find angular velocity of each pulley in radians per second.

7. ## Chemistry

A direct-current power supply of low voltage (less than 10 volts) has lost the markings that indicate which output terminal is positive and which is negative. A chemist suggests that the power supply terminals be connected to a pair of platinum electrodes

8. ## physics

1)A toy train is initially at rest on a track fastened to a bicycle wheel, which is free to rotate. How does the wheel respond when the train moves clockwise? When the train backs up? Does the angular momentum of the wheel-train system change during these

9. ## physics HELP MEEE SO CONFUSED

A spherical conductor has a radius of 14.0 cm and charge of 26.0 µC. Calculate the electric field and the electric potential (a) r = 10.0 cm, (b) r = 20.0 cm, and (c) r = 14.0 cm from the center.

10. ## chemistry

a 10.0mL vinegar sample was completely neutralized by 22.5mL 0.2M NaOH solution. calculate molarity and % of acetic acid in vinegar. please help

11. ## Science

Which of the following is a problem with using solar power as a main source of energy? A. People do not yet have the technology to use solar power*** B. The sun is not close enough to provide solar energy C. Power from solar energy contains a large amount

12. ## physics

A crate rests on a flatbed truck which is initially traveling at 17.8 m/s on a level road. The driver applies the brakes and the truck is brought to a halt in a distance of 33.1 m. If the deceleration of the truck is constant, what is the minimum

13. ## Physics

A tennis ball is dropped from 1.80 m above the ground. It rebounds to a height of 1.00 m (assume down to be negative). (a) With what velocity does it hit the ground? (b) With what velocity does it leave the ground? (c) If the tennis ball were in contact

14. ## Physics

A water wave is generated in a ripple tank by an oscillator that vibrates 50 times in 30 seconds. A given trough of the wave travels 50.0 cm in 15 seconds. What is the wavelength of the water wave? Produce all your workings. I got 50/30 = 1.67 vibrations

15. ## Math

A car traveled 36 miles in 45 minutes, the car traveled at a constant speed. If the the car continues to travel at this rate, which equation can be used to determine y, the total number of miles the car will travels in x hours?

16. ## General Chemistry

An electron in a hydrogen atom relaxes to the n = 4 level, emitting light of 114 THz. What is the value of n for the level in which the electron originated? I am halfway through, but uncertain as to how to simplify the problem to completion. (6.63 x 10^-34

17. ## chemistry

If the stockroom fails to dry the KHP to remove the waters of hydration, the student's calculated concentration for the standardized base will be (low, high, or unaffected) A drop of NaOH is hanging from the buret tip before the titration of KHP. Once the

18. ## physics

A spherical conductor has a radius of 14.0 cm and charge of 26.0 µC. Calculate the electric field and the electric potential (a) r = 10.0 cm, (b) r = 20.0 cm, and (c) r = 14.0 cm from the center. how do i calculate k?

19. ## Chemistry

The aquation of tris(1, 10-phenanthroline)iron(II) in acid solution takes place according to the equation: Fe(phen)3^2+ + 3H3O + 3H2O==> (Fe(H2O)6^2+ + 3 phenH^+ If the activation energy is 126 kJ/mol and frequency factor is 8.62 x 1017 s-1, at what

20. ## Math

how can you break apart arrays when you multiply by 3?

21. ## Chemistry

HOBr (aq) H+ (aq) + OBr- (aq), Ka = 2.3 x 10^-9 Hypobromous acid, HOBr, is a weak acid that dissociates in water, as represented by the equation. (a) Calculate the value of [H+] in a solution of HOBr that has a pH of 4.95. Ans: 1.1 * 10^-5 M (b) Write the

22. ## Chem

Ascorbic acid, H2C6H6O6, is a diprotic acide with a K1= 7.9 E-5 and a K2=1.6E-12. In a .005 M aq solution of ascorbic acid which of the following species is present in the lowest concentration. 1. H2O 2. H3O 3. H2C6H6O6 4. HC6H6O6 5. C6H6O6

23. ## American government

If a majority of committee members support a bill, what is likely to happen to it? A. The committee will pigeonhole the bill B. the committee will report the bill favourably to the floor C. The committee will rewrite the bill D. The committee will report

24. ## Physics

A person's body is producing energy internally due to metabolic processes. If the body loses more energy than metabolic processes are generating, its temperature will drop. If the drop is severe, it can be life-threatening. Suppose a person is unclothed

25. ## Epidemiology

Identify the study design best described by the scenarios or research questions presented below. Provide a two-sentence rationale for your answer. Choose from: • Ecologic • Cross-sectional • Case-control • Retrospective (Historical) Cohort •

y + 1.2y + 1.2z Someone told me that the answer was 2.2y + 1.2z 1. Is that true? 2. How did the 1.2y turn into 2.2y?

27. ## Biology

which of the following list structures from smallest to largest? A. chromosome, supercoil, coil, nucleosome, double helix B. chromosome, coil, double helix, nucleosome, super coil C. double helix, nucleosome, coil, super coil, chromosome D. nucleosome,

28. ## Physics

When the pendulum bob reaches the mean position, the net force acting on it is zero. Why then does it swing past the mean position?

29. ## Chemistry

A 0.5224g sample of an unknown monoprotic acid was titrated with 0.0998M of NaOH. The equivalence point of the titration occurs at 23.82 mL. Determine the molar mass of the unknown acid.

30. ## Physics

When the pendulum bob reaches the mean position, the net force acting on it is zero. Why then does it swing past the mean position?

31. ## Texas History

What troubled Manuel de Mier y Teran when he visited Texas, which he reported to the Mexican government? I picked "A. the amount of slavery in the state" because he was angry that Americans who arrived didn't respect the rule of "no slavery". Then I'm

32. ## math

find v for the following question.. the tip of the airplane propeller 3m long, rotating 500 times per minute (hint r=1.5m)

33. ## Chemistry

You have a stock 0.100 M solution of KMnO4 and a series of 100-mL volumetric flasks. What volumes of the stock solution will you have to pipet into the flasks to prepare standards of 1.00, 2.00, 5.00, and 10.0x10^-3M KMnO4 solutions? I tried using

34. ## Physics

A car is going 20m/s when they see a traffic light 200m ahead turn red. The traffic light is known to stay red for 15s. The driver wants to reach the light as it turns green. It takes them 1s to press the breaks and the car slows down at a constant rate.

35. ## physics

A 63.8 kg woman lifts herself 36.6 cm each time she does a chin-up. What force does she exert in lifting herself to the chin position? And, how much positive work does she do in pulling herself up once?

36. ## Physics

What is the angle of refraction of a light ray that enters the surface of a calm lake from air at an angle of 45o to the normal? The refractive index of water is 1.333. I don't even know how to start this or what the formula is. Thanks for your help in

37. ## physics

A particle travels horizontally between two parallel walls separated by 18.4m. It moves towards the opposing wall at a constant rate of 7.2m/s. Also, it has an acceleration in the direction parallel to the walls of 2 m/s^2. a) What will its speed be when

38. ## math

A Ferris wheel 28.0m in diameter rotates once every 21.0s. What is the ratio of a person's apparent weight to her real weight at the top? What is the ratio of a person's apparent weight to her real weight at the bottom?

39. ## chemistry

Kc=5.85x10^-3 at 25 degrees C for the reaction N2O4(g)2NO2(g) fifteen(15.0) grams of N2O4 is confined in a 5.00-L flask at 25 degrees C. Calculate(a) the number of moles of NO2 present at equilibrium and(b) the percentage of the original N2O4 that is

40. ## physics

A bow with a spring constant of 398 N/m has an arrow placed in it and pulled back a distance of 0.6 m. If the arrow is shot straight up in the air how high will it go? Assume the mass of the arrow is 0.16 Kg.

41. ## chemistry

A 30.0 mL sample of phosphoric acid is titrated with 18.0 mL of 3.0 M NaOH solution. What is the molarity of the phosphoric acid?

42. ## physics

Sprinting near the end of a race, a runner with a mass of 70 kg accelerates from a speed of 6 m/s to a speed of 9 m/s in 2 s. (a) What is the runner's average acceleration during this time? (b) To gain speed the runner produces a backward force on the

43. ## Physics

Which of the following equations describes the condition for observing the fourth bright fringe in Young's double-slit interference pattern? Assume n = 0 for the central bright fringe. Which of the following equations describe the condition for observing

44. ## physics

1. If the voltage impressed across a circuit is constant but the resistance increases by a factor of 15. By what factor does the current change? 2. If the resistance of a circuit remains constant while the voltage across the circuit decreases by a factor

45. ## American government

In both the house and senate, a bill introduced by a member is next a. Given a number b. Scheduled for floor debate c. Sent to a standing committee d. Sent to the president I read the text and I think the answer is D, am I wrong?

46. ## Elementary Statistics

There are 100 questions from an SAT test, and they are all multiple choice with possible answers of a,b,c,d,e. For each question, only one answer is correct, find the standard deviation for the numbers of correct answers for those who make random guesses

47. ## economics

In the following examples, state how you would use the principle of marginal analysis to make a decision. a. Deciding how many days to wait before doing your laundry b. deciding how much library research to do before writing your term paper c. Deciding how

48. ## chemistry

Benzene has a heat of vaporization of 30.72kj/mol and a normal boiling point of 80.1 C . At what temperature does benzene boil when the external pressure is 445 ? This is how I am solving this problem, but when I enter the answer it says im wrong. Can

49. ## calculus

The function f is twice differentiable, and the graph of f has no points of inflection. If f(6)+3, f'(6)=-1/2, and f"(6)=-2, which of th following could be the value of f(7). A.)2 B.)2.5 C.)2.9 D.)3 E.)4 the answer is A. but what are the steps to reach

50. ## Chemistry

Adding water to some chemicals can be dangerous because large amounts of heat are liberated. Which of the following does NOT liberate heat when water is added to it? KNO3 (the answer) NaOH Na CaO H2SO4 I guessed Na simply because it's the only one that's

51. ## Reaction rates

The reaction, C2H5Br --> C2H4 + HBr, has a rate constant k = 0.0000100 s-1 at 363 °C and k = 0.000479 s-1 at 427 °C. What is the rate constant for the reaction at 725 K? Round your answer to 3 significant figures.

I am going to have questions to answer on this passage, and it's very difficult to understand so if anyone could please help me paraphrase or give me a summary, it would help a lot. Thanks. Genius or originality is, for the most part, some strong quality

53. ## physics

1. How much acceleration does a 747 jumbo jet of mass 31600 kg experience in takeoff when the thrust for each of four engines is 30000 N? 2. Two boxes are seen to accelerate at the same rate when a force F is applied to the first and 5F is applied to

54. ## Chemistry

An enzymatic hydrolysis of fructose was allowed to proceed to equilibrium at 25 degrees C. The original concentration of fructose-1-p was .2 M, but when the system had reached equlibrium the concentration of fructose 1-p was only 6.52 * 10 -5 M. Calculate

55. ## physics

1. If our sun shrank in size to become a black hole, using the gravitational force equation, explain why the Earth's orbit would not be affected. 2. Strictly speaking, you weigh a tiny bit less when you are in the lobby of a massive skyscraper than you do

56. ## Chemistry

Three samples of an unknown acid are titrated with 0.4901 M NaOH. The average equivalent weight of the acid using the data below is g/equiv mass of unknown vol NaOH trial 1: 1.02 27.72 trial 2: .522 14.22 trial 3: .742 20.02

57. ## Chemistry Cell notations

Enter the balanced chemical equation including states that describes the electrochemical cell that is represented by the cell notation as shown. Pt(s) l H2O(l) l O2(g) l H+(aq) ll H+(aq), Cr2O72-(aq), Cr3+(aq) l Pt(s)

58. ## physics A

A net charge of 47 mC passes through the cross-sectional area of a wire in 19.0 s. (a) What is the current in the wire? 1 A (b) How many electrons pass the cross-sectional area in 1.0 min? 2 . electrons

59. ## chemistry

What mass of hydrogen peroxide should result when 1.50g of barium peroxide is reacted with 25.0mL of 0.50 M hydrochloric acid?

60. ## calculus

The sides and diagonal of the rectangle above are strictly increasing with time. At the instant when x=4 and y=3, dx/dt=dz/dt and dy/dt=k(dz/dt). What is the value of k at that instant. solved for z with pythagorean theorem and stuck at that step. z=5

61. ## statistics

you draw two cards from a standard deck of 52 cards, but before you draw the second card, you put the first one back and reshuffle the deck.

62. ## chemistry

In distillation components of a mixture are separated into groups of molecules with simi- lar 1. densities. 2. melting points. 3. None of these 4. bond energies. 5. boiling points. Filtration is which method of separation? 1. physical 2. chemical

63. ## physics

1. How much does it cost to operate a 75 W lamp continuously for 1 week if the power utility rate is 7/kWh?

64. ## physics

1. (a) How far below an initial straight-line path will a projectile fall in eight seconds? (b) Does your answer depend on the angle of launch or on the initial speed of the projectile? the answer is no. but defend it. 2. Why is it important that a

65. ## Physics

Which of the following is an example of diffuse reflection? light reflected from the surface of a dry asphalt roadway light reflected from the surface of a calm lake light reflected from the surface of glossy paper light reflected from the surface of a

66. ## college algebra word problem

Here's the problem I was asked: You are visiting your parents on a farm. They have asked you to design a small rectangular-shaped vegetable garden along an existing wall in their backyard. They wish to surround it with a small fence to protect their plants

67. ## chemistry

If you filled three balloons with eaqual volumes of hydrogen, argon, and carbon dioxide gas all at the same temperature and pressure, which ballon would weigh the most? The least?

68. ## chemistry

the standard state free energy of hydrolysis of acetyl phosphat is G= -42.3 kJ/mol. Calculate the free energy change for the acetyl phosphate hydrolysis in a solution of 2mM acetate, 2 mM phospate and 3 nM acetyl phospahte.

69. ## like-kind exchanges

My homework question is to name the four broad types of like-kind exchanges? Are they 1) Receipt of boot 2) Giving boot 3) Assumption of liabilities 4) Three-party exchanges I wasn't sure. There are five types defined at this web site:

70. ## Physics

In the figure a uniform, upward electric field of magnitude 1.90 × 103 N/C has been set up between two horizontal plates by charging the lower plate positively and the upper plate negatively. The plates have length L = 19.0 cm and separation d = 1.60 cm.

an aquarium is in the shape of a right rectangular prism. each side of the aquarium is a rectangle that is 10 in wide and 8 in high. when the aquarium is tilted, the water in it just cover an 8 in by 10 in end, but only three-fourths of the rectangular

72. ## math help needed bad

how do I make a box and whisker plot with the numbers 13,13,20,21,21,22,24,27? I put them all in order but since there is only 8 numbers i do not know how to find the median,the lower quartile,upper quartile the lowest value and the highest value. Please

73. ## physics

A hockey puck slides with an initial speed of 52.3 m/s on a large frozen lake. If the coefficient of kinetic friction between the puck and the ice is 0.02, what is the speed of the puck after 11.8 s?

74. ## Chem

.1 M HCl + .1 M NaCl .1 M HF + .1 M NaF .1 M HBr + .1 M NaBr Which of the above would be considered buffers?

75. ## finance *repost*

According to the Value Line Investment Survey, the growth rate in dividends for JCPenney for the previous 10 years has been -10 percent. If investors feel this growth rate will continue, what is the required return for JCPenney stock? Does this number make

76. ## Human Resource Management

"Create a diagram in PowerPoint® or Word mapping job opportunities starting from, or advancing to, the position focused on in your final project." For the diagram, I chose the tree diagram template in PowerPoint. My position is "Web Design." I have been

77. ## Physics

A rocket is launched at an angle of 56.0° above the horizontal with an initial speed of 103 m/s. It moves for 3.00 s along its initial line of motion with an acceleration of 31.0 m/s2. At this time its engines fail and the rocket proceeds to move as a

78. ## chemistry half reactions

How do i solve this half reaction with Mg(OH)2(s) --> Mg(s)? Complete and balance the displayed half reaction in basic aqueous solution taking into account the electrons. Mg(OH)2(s) → Mg(s)

79. ## algebra

A principal of \$5000 was invested in a savings account for 4 years. If the interest earned for the period was \$400, what was the interest rate? i know this is 1.5 % or at least I think it is but how do i write it out? Use the equation I=Prt, where

80. ## physics

If there were no air drag, how fast would drops fall from a cloud 2.4 kilometer above the Earth's surface? Answer in m/s.

81. ## physics

Bertrand Russell wrote, "I think we must retain the belief that scientific knowledge is one of the glories of man. I will not maintain that knowledge can never do harm. I think such general propositions can almost always be refuted by well-chosen examples.

82. ## Math

The world record for cycling a stretch of 20 kilometers is 26 minutes. This corresponds to an average speed of, approximately, (A) 29 mph (B) 46 mph (C) 32 mph (D) None of these

83. ## Calculus

The region between the graphs of x=y^(2)and x=2y is rotated around the line y=2. The volume of the resulting solid is... I've tried this five times and no luck. Please help. I think my a=o and b=2. I would appreciate the help.

84. ## Physics

Light cannot be linearly polarized by: transmission reflection diffraction diffraction

An astronaut drops a golf ball to the surface of the moon from a height of 1.5m. The golf ball has a velocity of 2.24 m/s right before it lands on the moon (assume this height to be zero). What is acceleration due to gravity on the moon?

86. ## math help needed bad

I'm really confused on how to answer this question. Can someone help me to figure this out? Thank you A survey about the student government program at a school finds that of 245 students: -218 like the program -27 students think this program is

87. ## Physics

I've been working on this problem for close to an hour now and keep getting very wrong numbers... The two objects with different mass (m1 = 5.0 kg and m2 = 3.0 kg) in the Atwood's machine shown in the figure are released from rest, with one object at a

For this question, use the information for Sports Baseballs, Inc. Sports Baseballs, Inc. is a corporation that manufacturers and sells baseballs across several states in the Southeast. It had sales of \$2.7 million during the last year. Expenses were as

89. ## math

A woman is sitting in a boat at anchor on a lake. Her boat bobs up and down once every 2.0·s. She notices that when the front of her 3.0·m long boat is at one wave crest, a second crest is at the middle of her boat, and a third is at the end. What is the

90. ## math(trig)

1) A 6-ft propeller turns at 1200 revolutions per minute. Compare the angular velocity of the tip with the angular velocity at a point 10 in. from its center. 2) What is the angular velocity of a point on the tread of a 15-in. diameter tire on a car

91. ## Physics

A bullet of mass 5.15 g is fired horizontally into a 2.74 kg wooden block at rest on a horizontal surface. The coefficient of kinetic friction between block and surface is 0.185. The bullet comes to rest in the block, which moves 1.84 m. (a) What is the

92. ## chemistry

Which element has atoms that can form single, double, and triple covalent bonds with atoms of the same element? the choices are florine, oxygen,carbon and hydrogen. i also need a explanation of why its the right answer. thanks for helping :) How do we see

93. ## trigonometry

Points on the terminal sides of angles play an important part in the design of arms for robots. Suppose a robot has a straight arm 10 inches long that can rotate about the origin in a coordinate plane. If the robot's hand is located at (10, 0) and then

94. ## statistics

A politician claims that she will receive 65% of the vote in an upcoming election. The results of a properly designed random sample of 100 voters showed that 49 of those sampled will vote for her. Is it likely that her assertion is correct at the 0.05

95. ## math

c=2πr c= 7.12 pi= 3.14 find value of r -rounded to 2 decimal points

96. ## math(trig)

1) What's the linear velocity of a point on the tip of a 6-ft propeller turning at 1200 revolutions per min? 2) A gear is driven by a chain that travels 90m/min. Find the radius of the gear if it makes 50 revolutions per minute.

97. ## math

A marksman's chance of hitting a target with each of his shots is 60%. (Assume that the shots are independent of each other.) If he fires 30 shots, what is the probability of his hitting the target at least 20 time? First, I found the mean by multiplying

98. ## statistics

A professor knows that in her class 37% of the students have passed an Algebra course, 29% have passed an English course, and 21% have passed both courses. If one student is selected at random from this class, find the probability that: c) the student did

99. ## chemistry

If 380. mL of 0.4294 M aqueous CaBr2 and 250. mL of 0.5880 M aqueous SO42- are reacted stoichiometrically according to the equation, how many mol of CaBr2 remained? Al2(SO4)3(aq) + 3 CaBr2(aq) → 2 AlBr3(aq) + 3 CaSO4(s)