# Posts by nick

Total # Posts: 1,360

1. ### Chemistry

Need help with Chemistry, thanks in advance! For the system: 2H2O(g) ? 2H2(g) + O2(g) ; at equilibrium 27.0g of H2O, 0.25g of H2 and 16.0g of O2 was found in a 5.0L flask. Calculate the equilibrium constant, Keq.
2. ### Chemistry

When 400ml of a 0.01M MgCl2 solution is mixed with a 300ml if a NaOH solution at pH 9.0, a precipitate will form. True or False?
3. ### Trigonometry

Prove cot u - cot 2u=cosec 2u?
4. ### math

graph the function and use graph to find the indicated limit f(x) = 7e^x, Lim x --> 0 F(x)

124
6. ### Calculus

If an arrow is shot upward on Mars with a speed of 52 m/s, its height in meters t seconds later is given by y = 52t ? 1.86t2. (Round your answers to two decimal places.) What is the average speed over the given time intervals? (i) [1, 2] (ii) [1, 1.5] (iii) [1, 1.1] (iv) [1, 1...
7. ### Calculus

If an arrow is shot upward on Mars with a speed of 52 m/s, its height in meters t seconds later is given by y = 52t ? 1.86t2. (Round your answers to two decimal places.) What is the average speed over the given time intervals? (i) [1, 2] (ii) [1, 1.5] (iii) [1, 1.1] (iv) [1, 1...
8. ### Calculus

Find the average speed over the given time intervals.
9. ### Calculus

If an arrow is shot upward on Mars with a speed of 52 m/s, its height in meters t seconds later is given by y = 52t ? 1.86t2. (Round your answers to two decimal places.) (i) [1, 2] (ii) [1, 1.5] (iii) [1, 1.1] (iv) [1, 1.01] (v) [1, 1.001]
10. ### Science

Explain the reaction (iron sulpide) using the Big Idea of Energy?
11. ### precalc

find the standard form of the hyperbola, the center and vertices given the foci (0, -+8) and asymptotes at y=4x
12. ### Chemistry

In an experiment, 95.0 mL of 0.225 M silver nitrate was mixed rapidly with 47.5 mL of 0.225 M calcium chloride in a coffee cup calorimeter. If a reaction occurred, was it exothermic or endothermic? If the reaction started at 23.7 °C, what is the final temperature of the ...
13. ### Math

In the early months of some year, one site added 0.5 million new accounts every day. At this rate, how many days would be needed to add 40 million new accounts?
14. ### Math

A car has a fuel efficiency of 33 miled per gallon.(a) Find a function G that calculates the number of gallons required to travel x miles. (b)If the cost of gas is \$4 per gallon, find the function C that calculates the cost of fuel to travel x miles.
15. ### Sociology

How would a conflict theorist analyze the attitude about the feminist perspective?
16. ### chem

1m^3= cm^3 is it 1000000cm^3?
17. ### Physics 1

its 0.5 seconds nvm
18. ### Physics 1

no my bad its 30 seconds.

.50seconds
20. ### algebra

Mark, Tony, and Grant decided to eat a 72-inch sub in one sitting. They divided it so that Tony (the big eater) would eat 8 inches less than triple what Mark would eat. That left Grant with a portion that was 5 inches longer than Mark's portion. How big was each person'...
21. ### math

find the reference angle, quadrant, and rotational angle for the point (3,-8)
22. ### calc

can you just answer my question?
23. ### Phase Transformation

Concentration vs Distance plots resemble _____________ . Lognormal distribution Binomial distribution Lorentzian distribution Gaussian distribution
24. ### Phase Transformation

Change in Gibbs free energy is _____ related to interfacial energy and _____ related to radius of precipitate. directly, inversely inversely, directly directly, directly inversely, inversely
25. ### Phase Transformation

Which of the following phase diagram shows liquid immiscibility ? Eutectic Peritectic Monotectic Eutectoid None of these

5/8
27. ### history

Explain how the Lend/Lease Act meant that the United States really wasn't being "neutral" before they joined WWII.
28. ### Math

MIKE has a dog pen with an area of 120 sq. Feet. What is its width?
29. ### Math

What is 7/2 into a proper fraction?
30. ### Statistics

The correlation coefficient between X and Y is the same as the correlation coefficient between Y and X. True - If you were to find the correlation coefficient with a given data set for x and y, it would have the same correlation coefficient value as y and x. Can you check if ...

1 bc 2c 3a
32. ### Chemistry

What volume will 11.2 grams of H2 gas occupy at 25.1oC and a pressure of 758 mmHg?
33. ### Genetics

Alkaptonuria is a recessive trait. If tow parents are carriers(heterozygous, unaffected), what is the chance they would have: A. 2 children, both with alkaptonuria? B. 3 children, all 3 not having alkaptonuria? C. 5 children, the first 3 not having alkaptonuria and the last 2 ...
34. ### Math

Lisa is running around the circular track x^2+y^2=10000, whose radius is 100 meters, at 4 meters per second. She starts at point (100,0) and runs in the counterclockwise direction. After 30 minutes of running, what are her coordinates?
35. ### Math

Using suffix notation and the summation convention, prove that u.del*u= w x u+ del(1/2q^2) where w= del x u and q= /u/?
36. ### Math (Tensor Notation)

Using suffix notation and the summation convention prove that u.del(u)= w x u + del(1/2q^2) where w= del x u and q=/u/
37. ### stats

Industry standards suggest that 18% of new vehicles require warranty service within the first year. Jones Nissan, sold 11 Nissans yesterday What is the probability that less than three of these vehicles require warranty service?
38. ### Math

I need help solving equation it says to round to the neatest hundredth if needed the problem is 9- 6(1-5a)=-26
39. ### pre calc

-1less or equal to x less then 4, state raltion represented by y=[2x]+1 by listing ordered pairs
40. ### Calculus

the sum of three positive numbers is 40. The first plus three times the second plus four times the third add up to 80. Select the numbers so that the product of all three is as large as possible.
41. ### Physics

A tension spring opposes being stretched, but offers no resistance to being compressed (think of a slinky!). A tension spring, with an equilibrium length of 1.25 m, is suspended by one end from a ceiling at a height of 2.5 m above the ground; a mass of 100 g is attached to the...
42. ### calculus

A rectangular poster is to have 50 squared inches for printed matter. It is to have a 1? inch. margin on each side and a 2? inch. margin at the top and bottom. Find the dimensions of the poster so that the amount of paper used is minimized. Horizonatal width= Vertical Height=
43. ### math

A rectangular poster is to have 50 squared inches for printed matter. It is to have a 1? inch. margin on each side and a 2? inch. margin at the top and bottom. Find the dimensions of the poster so that the amount of paper used is minimized. Horizonatal width= Vertical Height=
44. ### Social studies

Helping u is correct
45. ### Physics

A car is proceeding at a speed of 14.0 m/s when it collides with a stationary car in front. During the collision, the fist car moves a distance of 0.350 m as it comes to a stop. The driver is wearing her seat belt, so she remains in her seat during the collision. The driver&#...
46. ### Science

Help pzzzzzz Sound in an empty room can be very loud,with many echoes.Describe three ways to make the room quieter?
47. ### Algebra 2

By graphing the system of constraints, find the values of x and y that maximize the objective function. 2x+y<=300 x+y<=200 x=>0 y=>0 maximum for p=x+2y
48. ### maa central

a set is composed of marbles with different colors, namely: 5 blue marbles, 3 red marbles and 2 gren marbles.What is the fractional form of blue marbles?

50. ### Math

If there are 35 kids in a class and 22 are girls what is the ratio of girls to boys in the class
51. ### Math

3. (2.56 x 10^6) x (3.56 x 10^2) = a. 9.1136 x 10^12 b. 91.136 x 10^8 c. 9.1136 x 10^8 d. 91.136 x 10^12 4. In a recent year, the population of California was about 2.52 x 10^7 people. Its land area is about 4.05 x 10^5 km2. What was the average number of people per square ...
52. ### math

Find the angle of depression from the top of a lighthouse 191 feet above the water level to the water line of a ship 4 miles offshore.
53. ### chemistry

Gold has a latent heat fusion of 64.5 J/g. How much energy is required to melt 20.0 g of gold?
54. ### chemistry

Ethyl alcohol has a heat of vaporization of 850. J/g. What mass of ethyl alcohol can be boiled using 15000 J of energy?
55. ### chemistry

A student melts 50.0 grams of ice using 16650 J of energy. What is the heat of fusion of ice?
56. ### American History

Hello there! I believe the answer is, B! Hope I helped, join me on Brainly(dot)com
57. ### physics (super hard)

a carnival ride is designed with seats that carry two people weighing 910.0 N each. the seats itself weights 630 N.each seat is connected to central spindle by one chain and rotates on a radios of 6.07 meters. the ride is designed to rotate fast enough that the seats swing out...
58. ### physics

a grandfather clock is designed to have a pendulum which swings a mass at the end of the chain in a horizontal circular motion. the pendulum is designed to swing 7 degrees off of the vertical. the chain is 1.50 meters long and the maximum tension in the chain is 12.0 N. ...
59. ### physics

an 85kg concrete block rests on a flat surface with coefficient of static friction us=0.42. find the maximum force that can pull on the block with, angle of 38 degrees above the horizontal without moving the block? please help and show work

helpppp
61. ### physics

determine the minimum radios of a highway curve which has banking angle of 5.74% over which vehicles will travel at 110km/h. assume that there is no friction between the road and the tires. calculate the radios?

=16*15 = 240
63. ### math

Five years after purchase, a machine has a value of \$300. The depreciation rate is 26% per year. Calculate the value of the machine when it was bought five years ago.?
64. ### math

One sign blinks every 9 seconds. The other sign blinks every 15 seconds. In how many seconds will they blink together again
65. ### Math

The minute hand of a colck is 10cm long.How far does the minute hand move in 1 hour?
66. ### Algebra Word promblems

Use linear calculator
67. ### math

Use an integer to represent the change in the airplane's height. An airplane descends 5,000 feet.
68. ### math

use an integer to represent the change in the airplanes height.an airplane descends 5,000 feet.
69. ### English

I don't know what to use...which answers do i use because i have 2 day left until the end of the school year
70. ### math

The first one is C. Im pretty sure.
71. ### Math

What is the perimeter in meters of a rectangle that is 13 meters long and 10 meters wide
72. ### pysics

550 g of water (cw = 4186 J/kg.K) at 75°C is poured into an 855 g aluminum (cw =900 J/kg.K) container with an initial temperature of 11°C. What is the final temperature of the system, assuming no heat is exchanged with the surroundings? Select one: a. 75 °C b. 59 &...

On a print with a scale of 1/2=1FOOT HOW much would a 20 ft hallway be in inches?

true
75. ### mental math

if 600 divde 6 =100 then 602 divde 6 = n
76. ### Statistics

Listed below are body temperatures for four subjects measured at two different times in a day. Body Temperature (°𝐹) 𝑎𝑡 6 𝑎𝑚: 98.0,97.0,98.6,97.4 Body Temperature (°𝐹) 𝑎𝑡 6 𝑝𝑚: 98.0,97.6,98...
77. ### Stastics

The UMUC bookstore states the average textbook costs \$119. A randomly selected sample of 26 new textbooks at the UMUC bookstore had a mean price of \$123.45 and sample standard deviation of \$15.23. Use a 0.05 significance level to test the claim that the mean price of textbooks...

thanks 100%
79. ### Math

If an oval is 225 yards how many feet of fence go around it fence is sold by foot how o I figure it out
80. ### chemistry

dHf=-99.4 kJ/mol (AgNO3) dHf= -795.0 kJ/mol (CaCl2) Got these from the sheet
81. ### Language arts unit 3 lesson 5 second read

Jesus Christ you guys sure are thick.. Do your work next time!
82. ### Math

How many apples will it take to get 27kg 8 divided by ? equals 27kg
83. ### Physics

A man completes 31 lengths of a 50 metre pool with an average speed of 0.9 km/h. What is the magnitude of his average velocity vector in Standard SI units?
84. ### History

this is deppressing time to get in bed and cry for three days again

Isn't is b?
86. ### Math

What is the rate of the current if a canoe travels 22mph
87. ### Chemistry

Using your knowledge of chemical migration, outline the two most possible chemical migration pathways for non-polar C9H12 that has been spilled onto an open field on a warm spring day.
88. ### Physical Education

Definitely C.
89. ### Math

In the questions below P(x,y) means “x and y are real numbers such that x + 2y = 5”. a) Determine whether the statement ∃x∀yP(x,y) is true. b) Negate the statement ∃x∀yP(x,y).
90. ### math

if don gecewicz invested \$6000 at 8% interest compounded quarterly, find the amount after 7 years
91. ### Physics

The figure shows an arrangement in which four disks are suspended by cords. The longer, top cord loops over a frictionless pulley and pulls with a force of magnitude 93.4 N on the wall to which it is attached. The tensions in the shorter cords are T1 = 61.4 N, T2 = 41.5 N, and...
92. ### Math

You live 2 3/4 miles from school. In the morning, you walk 1/3 mile directly toward school to the bus stop. Later, when you get off the bus, you walk home the same distance. How many miles do you ride to and from school each day?
93. ### Health

Mac N is right! i got a 9/10 but only cuz i put down the wrong answer for
94. ### Math

Use the distributive property to solve the equation 8+1/7x=9.

thx guys
96. ### physics

A piece of luggage is being loaded onto an airplane by way of an inclined conveyor belt. The bag, which has a mass of 15.0 kg, travels 4.50 m up the conveyor belt at a constant speed without slipping. If the conveyor belt is inclined at a 30.0° angle, calculate the work ...
97. ### Math plz help someone.

rosa quilts a square rug that has an area of 400 square inches. what is the length on each side of the rug? A. 14 B.16 C.18 D.20
98. ### math

Elaine is making a model of a house that she designed. She wants to put wood molding around two rooms in the model. She measures and finds that she needs feet of molding for one room and feet of molding for the other room. She has feet of molding
99. ### Chemistry

Would you expect H 2 SO 3 to be oxidized to H 2 SO 4 in our natural environment? Please explain using the molecules in our environment and the concept of oxidation states.

P(x)=6x-x^2/100 - 50+3x P(x)=-x^2/100 + 3x-50 a=-x^2/100 b=3x c=50 h= -b/2a h= -3/2(1^2/100) h= -3/0.02 h= -150 aka positive 150 when graphed.
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