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Peter
Questions (461)
Fill each blank with a coordinating word or phrase and proper punctuation in order to form a combined sentence.
1.Exercise has
8 answers
872 views
A flask contains 0.528 g of acid and a few drops of phenolphthalein indicator dissolved in water. The buret contains 0.200 M
0 answers
511 views
A box weighing 8.0 kg has to be moved from the floor to the back of the truck, using a ramp 2.5 m long inclined at 30°. The
1 answer
564 views
A ice cream shop sells 4 flavors of ice cream, assume that all orders of two scoops are equally likely, what is the probability
1 answer
551 views
A spacecraft in orbit around the moon measures its altitude by reflecting a pulsed 10Mz radio signal from the surface. If the
1 answer
1,383 views
2NO(g)+O2(g)<->2NO2(g) has KP = 2.77 × 1011 at 25 °C. Suppose a mixture of the reactants is prepared at 25 °C by transferring
4 answers
533 views
Society often forces individuals to act a certain way. The manipulation of blending into the masses in order to follow the
0 answers
383 views
At 25 oC, Kc = 0.145 for the following reaction in the solvent CCl4.
2BrCl <----> Br2 + Cl2 A solution was prepared with the
2 answers
3,342 views
At 25 oC, Kc = 0.145 for the following reaction in the solvent CCl4.
2BrCl <----> Br2 + Cl2 A solution was prepared with the
0 answers
824 views
What is the molarity of an HCl solution if 14.0mL HCl solution is titrated with 22.6mL of 0.155 M NaOH solution?
1 answer
708 views
A sample of nitrogen gas is collected over
water at a temperature of 23°C. What is the pressure of the nitrogen gas if the
1 answer
664 views
If a 1.5V battery stores 5.0kj of energy,for how many minutes could it sustain a current of 1,2A?
1 answer
3,870 views
If there are 5 liters of oxygen gas (O2) at 300 K and 400 torr, what will it weigh?
Answer in units of g. Do I use the Ideal gas
3 answers
1,877 views
How much Na is needed to react with H2O to
liberate 179 mL H2 gas at STP? Answer in units of g Please help me with what formulas
1 answer
1,332 views
Work it out. How many joules of heat is given out when pieces of iron of mass 50g and specific heat capacity =460kgk cools from
5 answers
830 views
Newton law of cooling and cooling collision.
1 answer
522 views
240N
0 answers
315 views
Write on Newton law of cooling and cooling collision.
1 answer
484 views
Consider what you have learned about American history during the period of 1862 the early 1900s how did the stories by Mark
3 answers
2,343 views
A pilot of an airplane flying at 12,000 feet sights a water tower. The angle of depression to the base of the tower is 25°.
1 answer
1,934 views
Is the period of f(x) = 2cos(3x - ð) 2ð/3?
2 answers
380 views
The density of ice is 0.9168 g/cm3.
The density of water is 0.9998 g/cm3. Calculate the difference between ΔU (internal energy)
1 answer
805 views
How much copper is in 4.722 mol of copper(II)
chloride? Answer in units of g What should I do?
0 answers
336 views
Balance this chemical equation.
K4Fe(CN)6 + KMnO4 + H2SO4 ---> KHSO4 + Fe2(SO4)3 + MnSO4 + HNO3 + CO2 + H2O
2 answers
3,072 views
A 150N block rests on a table. The suspended mass has a weight of 73N.
a) What is the magnitude of the minimum force of static
2 answers
3,625 views
A 150N block rests on a table. The suspended mass has a weight of 73N.
a) What is the magnitude of the minimum force of static
0 answers
636 views
What amount of energy is required to completely ionize 21.5 grams of carbon atoms in the gas phase (C(g)) if the ionization
1 answer
722 views
Which element is located in the family represented by ns²np³?
A) Ti B) Se C) AS D) I E) Sb
2 answers
485 views
Which statement concerning the electrons surrounding the nucleus of an atom is NOT correct?
a) When 2 electrons pair together,
1 answer
1,818 views
Calculate the density of a substance in pennyweights per peck that has a volume of 0.371 hogsheads and a mass of 41.6 kg.
1
7 answers
2,123 views
Let f(x) = 2x-1 and g(x) = 4-x. Find all values of x for which f(x) < -1 or g(x) <3. solution set in interval notation.
1 answer
927 views
Thomas needs a b in his class. his current test scores are 88, 83, 86 and 72. his final exam is worth 3 test scores. In order to
2 answers
1,275 views
Is the difference of quotient of f(x) = -3x² -x equal to -3h - 6x - 1?
1 answer
382 views
Calculate the frequency of radiation with a wavelength of 1.27 × 104 °A (angstroms).
Answer in units of s^−1. I got
5 answers
815 views
Please can you explain what this question means. I don't understand the question especially 'carbon'.
Design your own carbon to
4 answers
551 views
Elements with an even number of protons and neutrons
A. never undergo alpha decay emission. B. have a single magic number of
0 answers
519 views
Naturally occurring boron is 80.20% boron-11 (of atomic mass 11.01 amu) and 19.80% of some other isotope form of boron. What
3 answers
1,966 views
Find two quadratic functions, one that opens upward and one that opens downward, whose graphs have the given x-intercepts.
(-3,
1 answer
1,943 views
Write the standard form of the quadratic function that has the indicated vertex and whose graph passes through the given point.
V
1 answer
1,543 views
Is this grammatically correct?
However, through influence by Lord Henry Wotton with his words, “Don’t squander the gold of
1 answer
349 views
Is this sentence grammatically correct?
In the novel, Picture of Dorian Gray, by Oscar Wilde, the character Dorian Gray conveys
1 answer
504 views
I need help sketching the graph of a piecewise function.
f(x) = { x² if |x|≤1, -x² if |x|>1
1 answer
419 views
How do I find the minimum or maximum of this y = 2x³ + 3x² - 12x? It makes 2 curves.
1 answer
707 views
Determine the open intervals on which the function is increasing, decreasing, or constant.
f(x) = 3 f(x) = x^(2/3) f(x) =
1 answer
2,848 views
Determine whether the equation represents y as a function of x.
|y| = 4 - x If I plug in 5, then I get -1, but it also means 1.
1 answer
633 views
Which sets of ordered pairs represent functions from A to B? Explain.
A = {a, b, c} and B = {0, 1, 2, 3} A. {(a, 1), (c, 2), (c,
1 answer
7,314 views
Write the first four terms of the sequence defined by the recursion formula.
a1 = 6 and an = 3an-1 for n ≥ 2
2 answers
1,357 views
The percent decrease from 5 to 4 is how much less than the percent increase from 4 to 5?
A. 0% B. 5% C. 15% D. 20% E. 25%
3 answers
500 views
If θ represents an angle such that sin2θ = tanθ - cos2θ, then sin θ - cosθ =
A. -√2 B. 0 C. 1 D. 2√2 What equation can
3 answers
1,799 views
A gas is sealed in a container with rigid walls that allow heat to flow through them. A thermal process takes place on the gas.
1 answer
488 views
A large air-filled 0.1-kg plastic ball is thrown up into the air with an initial speed of 16 m/s. At a height of 4.7 m, the
1 answer
1,569 views
Please help.
Concentrated hydrochloric acid is a 38% w/w solution of HCL in water and has a density of 1.18g/ml. How many
1 answer
614 views
Please help.
Concentrated hydrochloric acid is a 38% w/w solution of HCL in water and has a density of 1.18g/ml. How many
2 answers
726 views
(x-16)^2=64
2 answers
312 views
Outline a separation scheme for isolating pure isopentyl acetate from the reaction mixture.
1 answer
1,571 views
Determine whether the pair of lines are parallel, perpendicular, or neither.
1)f(x)=2/3x+1 2)2y+3x=1
1 answer
375 views
Y=x^3-6x^2+9x-4.calculate the average rate of change of y with respect to x.
1 answer
446 views
A tank consists of a right circular cylinder at height (h)surmounted by a hemisphere at a radius (r) with an outlet atthe top.
0 answers
629 views
hello i am doing a recearch project on Hong Kong and one of the questions are: what are your countries Fiscal and monentary
4 answers
551 views
I'm confused on the rule of multiplication and the rule of addition. When do I use each to determine the probability of a
0 answers
384 views
The observed distribution of offspring was: black-red 1,070; black-white 177; green-red 180; green-white 1,072. Based on these
2 answers
1,157 views
Jessica has no dimples and attached ear lobes. Jessica's mother has dimples and detached ear lobes, and her father has no
1 answer
514 views
Solve each equation below for x. (Use logarithms.)
10^(2x^(2)-5x+11) = 10000 9^(2(x-1)) = √(27)
1 answer
440 views
You have 20 grams of phosphorus-32 that decays 5% per day. How long will it take for hlaf of the original amount to decay?
3 answers
2,787 views
Who benefited from the growth of classical liberalism during the industrial revolution? Who did not benifit from it?
Why didn't
2 answers
457 views
Who benefited from the growth of classical liberalism during the industrial revolution? Who did not benifit from it?
Why didn't
0 answers
821 views
1. MES (2-(N-Morpholino)ethanesulfonic acid) is a common buffer used in biochemistry labs to stabilize proteins. The pKa for MES
3 answers
1,646 views
In how many places does
y=4x^2-2x-5 cross the x axis?
1 answer
303 views
My son is grade 4
his homework have question is : when you multiply any number by 1,what is the product ? Please help !!!!
4 answers
526 views
when you multiply any number by 1,what is the product ?
1 answer
271 views
solve 3^x=4^(x-2)
1 answer
317 views
An orange grower finds that she gets an average yield of 40 bushels per tree when she plants 20 trees on an acre of ground. Each
0 answers
682 views
What is the maximum product of two numbers whose sum is 22? What numbers yield this product?
2 answers
7,376 views
A rancher is fencing off a rectangular area with a fixed perimeter of 76 m. What dimensions would yield the maximum area? Find
1 answer
1,634 views
Consider a circle centered at (2,4). What are the coordinates of the center of the translated circle if we replace x with x-3
1 answer
462 views
Find the equation of the parabola that goes through the given points.
(1,2) (0,5) (-1,14)
1 answer
430 views
The perimeter of a rectangle RSTV is 44 ft. Find the least value of the diagonal RT.
1 answer
475 views
what are 4 main disadvantages of visiting other countries?
1 answer
292 views
Show that for any complex number z, |z| = |-z|. (Hint: Let z = a + bi.)
1 answer
374 views
A ball, of mass 0.3Kg, is held on the inside of a smooth hemispherical bowl at a height 0.15 m above the base. It is then
1 answer
539 views
R is bounded by Y=2x-x^2 and the x-axis. Find the centroid of R. Sketch the region.
0 answers
494 views
Two forces, 422 N at 24� and 278 N at 29� are
applied to a car in an effort to accelerate it. mass of the car is 3000kg Find the
1 answer
438 views
Which functional group is most likely to be responsible for an organic molecule behaving as a base (-OH donator / H+ acceptor)?
A
1 answer
904 views
If a protein's primary structure is predetermined or directed by a "source." what might this "source" be?
0 answers
442 views
There are 20 amino acids that cells use to build the numerous amounts of proteins that are essential for life. If a protein
0 answers
937 views
When x² - 3x + 2k is divided by x + 2, the remainder is 7. Find the value of k. Use synthetic division to do so.
1 answer
3,329 views
When two rational expressions are divide, the quotient is 5x² + 3x + 12 + 7/(x + 5. What are the two polynomials?
2 answers
1,352 views
(4a³b + 5a²b² + a⁴ + 2ab³)÷ (a² + 2b² + 3ab)
3 answers
954 views
A falling skydiver has a mass of 123 kg.
(a) What is the magnitude of the skydiver's acceleration when the upward force of air
2 answers
1,234 views
A box is sliding up an incline that makes an angle of 12.0° with respect to the horizontal. The coefficient of kinetic friction
1 answer
1,228 views
Factor.
-16 + 17(5-y²)-(5-y²)² and [x + y + 1][x² - x(y + 1)+(y + 1)²
1 answer
355 views
Factor.
(y-1)⁴ - (y-1)²
1 answer
309 views
1/16(x)^3a + 1/2(y)^(6a)(z)^(9b)
2 answers
284 views
Factor.
2x⁴ + x³ + 2x² + 4x - 24
1 answer
586 views
Solve for x.
x³ + ax² - a²x - a³ = 0
1 answer
588 views
Solve for x.
2x² - 5bx + 4cx - 10bc = 0
2 answers
580 views
1:3 and 1:2
Which one is a larger ratio? What does it mean for a ratio to be larger or smaller? Thank you.
0 answers
322 views
Can anyone check this text and if there are any mistakes, fix it?
I am writing to complain about the advertisement for your new
2 answers
870 views
Calculate the mean and standard deviation of the probability distribution created by rolling a dice. Either show work or explain
0 answers
358 views
Solve 5x + 12y = 47 using Diophantine equations.
1 answer
491 views
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