# shay

Popular questions and responses by shay
1. ## Chemistry

which sign of chemical reaction is not detectable by sight?

2. ## Algebra

Graph the line whose x-intercept is -8 and whose y-intercept is -7

3. ## Pre calculus

Find cos theta and cot theta if sin =1/4 and tan theta

4. ## Physics

Please check my answers: The voltage across a 10-ohm resistor carrying 3 amps must be? I got 30 volts-v=?, I=3 amps, R= 16 ohm. v= 30 amps * 10 ohm=30 volts A 4-ohm resistor is connected in parallel with a 6 ohm resistor. What is the total resistance of

5. ## chemistry

Radon-222 undergoes alpha decay.what is the nuclear equation

26. ## math

four diesel ships left a port at noon;january2,1953.the first ship returns to this port every 4 weeks, the second every 8, the third every 12,and the fourth every 16.when did all four ships meet again in the port?

27. ## Math

A plane is flying with an airspeed of 190 miles per hour and heading 140°. The wind currents are running at 25 miles per hour at 165° clockwise from due north. Use vectors to find the true course and ground speed of the plane. (Round your answers to the

28. ## english

what do i capitalized in this sentence.john grisham is the author of "the street lawyer".

29. ## algebra

Write a rule for the pattern. -3,-9,-14,-47,-141,.....

30. ## chemistry

What is the complete ionic equation for the double displacement reaction: CuNO3(aq) + K2S(aq)= what is the chemical name and formula of this chemical reaction? plsss. need help

31. ## Chemistry

Would you expect a chemical change to be always accompanied by a physical change? Explain?

32. ## chemistry

Reacting Mg with acid solution to form Mg salt and Hydrogen gas. What are the: 1.general reaction type 2. Chemical equation include phase 3. complete ionic equation include phase 4. chemical equation for the reaction between magnesium with water

33. ## chemistry

For each of the following bonds, indicate the positive end with \delta^{+} and the negative end with \delta^{-}. Write an arrow to show the dipole for each. 1. Si-Cl 2. Se-F 3. Br-F 4. N-H 5. N-P

34. ## physics

A tennis ball is thrown vertically upward with an initial velocity of +7.5 m/s. What will the ball’s velocity be when it returns to its starting point? The acceleration of gravity is 9.81 m/s 2 . Answer in units of m/s How long will the ball take to

35. ## physics

A ﬂowerpot falls from a window sill 25.3 m above the sidewalk. What is the velocity of the ﬂowerpot when it strikes the ground? The acceleration of gravity is 9.81 m/s 2 . Answer in units of m/s How much time does a passerby on the sidewalk below have

36. ## English

which of the following is an example of a fragment? A) When Ted went to work, Bob went home. B) Although Ted went to work and Bob went home. C) Bob went to work although Ted went to work. D) Although Ted went to work, Bob went home. I Think the answer is

37. ## physics

What is the kinetic energy of a 20 kg dog that is running at a speed of 7.3 m/s (about 16 mi/h)?

38. ## Physics

When a pair of identical resistors is connected in series which of the following is the same for both resistors: voltage across each, power dissipated in each, current through each? What about if the resistors are different from each other?

39. ## math

Operations with scientific notation Perform the indicated operation. Each final answer must be written in scientific notation. 1. (2.34*10^5)*(-4*10^-8) 2. (4*10^3)*(4.5*10^-3) 3. (5*10^5)*(4.3*10^2)

40. ## Chemistry

The following solutions are combined in a calorimeter to determine the enthalpy of the neutralization reaction. 100.0 mL sodium hydroxide, NaOH, of unknown concentration an excess of 1.3732 M hydrochloric acid, HCl. The experimental value for q is

41. ## Language arts

how does Squeaky feel about taking care of Raymond? A) She complains about it. B) It makes her feel important. C) She ignores him. D) She feels protective of him.***

42. ## math

Justin writes the letters I-L-L-I-N-O-I-S on cards and then places the cards in a hat. What is the probability of picking an N? 8/1 7/1 1/8 1/7

43. ## math 107

Suppose you want to have $600,000 for retirement in 35 years. Your account earns 7% interest. a) How much would you need to deposit in the account each month?$ b) How much interest will you earn?

54. ## chemistry

when two solutions are mixed and a new color is observed is this color change an indication that a chemical reaction has occurred? Explain why?

55. ## chemistry

decomposition of water to form elemental Hydrogen and Oxygen gas. What will be the balanced chemical equation, type of reaction and the driving force of the reaction?

56. ## chemistry

what is the gas formed when baking soda is added to vinegar? complete the reaction: NaHCO3(s) + CH3COOH(aq)

57. ## chemistry

Is there a gas formed if you heat a sugar? What will be its identity

58. ## chemistry

The half-life for the radioactive decay of calcium-47 is 4.5 days.If a sample has an activity of 4.00uCi after 13.5 days, what was the initial activity of the sample?

59. ## chemistry

When californium-249 is bombarded by oxygen-18, a new isotope and four neutrons are produced. Express your answer as a nuclear equation.

60. ## Physics

A person walks 13.9◦ north of east for 2.51 km. Another person walks due north, then due east to arrive at the same location. How far due north would this person walk? How far due east would this person walk?

61. ## math

tracy had coffee once a day, and the special blend she bought at Donna's Coffee Stop cost about $3.00 a cup. Max bought coffee at Donna's coffee stop twice a day. He bought several different types of special blends that cost$.400 a cup on average 3. Tracy

62. ## Math

Find the remainder when 13^18 + 19^12 is divided by 247.

63. ## Math

Find the units digit in 23^7777 by looking for mod 10.

64. ## English

Using the lists of possible answers, use the letters assigned to the characters/people to identify who would be the speaker of each of the following paraphrases/quotations: 1)I think we'll all be destroyed by the A-Bomb,so why should I care about anything?

65. ## English

Which of these is the properly punctuated sentence? a)Ted went to work and Bob went home. b)Ted went to work; and Bob went home. c)Ted went to work. And Bob went home d)Ted went to work, and Bob went home. Would the correct answer be D?

66. ## English

Which of the following is correct? a) We were supposed to go to the game today, but it rained. b)We were suppose to go to the game today, but it rained.

67. ## English

Which of the following is correct? a)Who's toothbrush is floating in the toilet? b)Whose going to Dairy Queen with me? c)Whose jacket is that? d)b&c I believe the answer is C

68. ## algebra

completely factor the following expression. 16a^2-40ab+25b^2

69. ## intermediate algebra

factor completely. Remember to look first for a common factor. If a polynomial is prime, state this. -4t^2+64 -(4t^2-64 =((2t)^2-8^2) (a^2-b^2)=(a+b)(a-b)

70. ## algebra

Essay. Show all work. the rectangular swimming pool is given by 2x^2-5x-3 ft.^2. One side length of the pool is given by 2x+1 feet. What is an algebraic expression for the other side length of the pool? Simplify this, and include correct units as part of

71. ## Algebra II

Solve the problem. The profit made when t units are sold, t>, is given by P²-36t+320. Determine the number of units to be sold in order for P>0 (a profit is made).

72. ## Algebra

The length of a rectangle is three times its width. If the area of the rectangle is 300cm, find its perimeter.

73. ## geometry

This is a two-column proof requiring 6 answers for each column. Given: line AB is perpendicular to line CD. Prove: m angle 2 + m angle 4 + m angle 7 = m angle 1.

* What is the difference between lobbying and bribery? * What argument could the SLOC members make that the payments made do not fit the definition of an illegal bribe (under the FCPA)? * What do you think is the appropriate punishment for the violation of

as dr. andrea mogan listens to allison sanchez describe her ailments, she jots down her insights and treatment ideas. a health records specialist will later enter these _______ into allison's electronic medical record a. diagnostic reports b. medication

76. ## Math 213 Elementary Math

Use the definition of less than to show each of the following: a. 2 < 4 b. 3 < 100 c. 0 < 3

simplify the following expressions involving complex numbers. (3+2i)-(-7-i) 10 + 3i how did you do that? can you show me this one and explain how this time? (3+2i)(-7-i) or even (3-2i)^2 you would do 3+2i=5i, then -7-i=7i then 5i+7i=12i (3+2i)-(-7-i) =

78. ## algerbra

mrs. johnson is 3 times as old as her son. ten years agoe she was 5 times as old as her son was then. what is the two equations for this problem? let x = son's age and y = Mrs. Johnson's age. ============================ y=3x is one equation. 10 years ago

79. ## Calculus

Hello. I would appreciate it if someone could check my answers. I'm sorry it is so long. 1.) Let R denote the region between the curves y=x^-1 and y=x^-2 over the interval 1

80. ## Chemistry

What are the values of q, w, ΔU, ΔH, ΔS, ΔSsurr, and ΔSuniv for the following constant pressure process for a system containing 0.956 moles of CH3OH ? CH3OH(g, 122.0 ºC, 1.00 atm) ⟶ CH3OH(l, 34.0 ºC, 1.00 atm) Assume that CH3OH(g) behaves as an

81. ## chemistry

One mole of O2(g) undergoes the following change in state. O2(g, 299 K, 4.38 bar) ⟶ O2(g, 252 K, 6.79 bar) What is ΔS for the gas? Assume ideal gas behaviour. The constant pressure molar heat capacity for O2(g) is Cp,m = 29.10 J K−1 mol−1.

82. ## chemistry

A sample of gas is compressed from 12.93 L to 3.83 L using a constant external pressure of 4.89 atm. At the same time, 1,957 J of heat flows into the surroundings. What is the internal energy change for the gas?

83. ## chemistry

What is w when 3.93 kg of H2O(l), initially at 25.0 ºC, is converted into water vapour at 157 ºC against a constant external pressure of 1.00 atm? Assume that the vapour behaves ideally and that the density of liquid water is 1.00 g/mL.

84. ## Chemistry

Consider the neutralization between the following two solutions: 100.0 mL 0.9285 M hydrochloric acid, HCl 150.0 mL 1.8269 M sodium hydroxide, NaOH How many moles of water are produced by this neutralization?

85. ## Social studies

What were some influences on self-government? Select all that apply. ~Commentaries on the laws of England ~ The Columbian bill of rights ~English bill of rights ~ Poor Richards almanac

86. ## Physics

A state trooper’s car sends out a radar signal at a frequency of 14 GHz. Find the wavelength of this signal. The wave speed is 2.998 × 108 m/s. Answer in units of m

93. ## Maths

There are Number cards ”3”、”4”、”5” with 10 cards each ，choose any 8 cards to sum up to 31,then what is the maximum number of cards “3” in the combination?

Allie was making a cookie recipe that called for 30 chocolate chips. She wants to make 2 batches of cookies. How many chocolate chips does she need? 1 group = 30 30+30=60 or 2x30=60 ?