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The chemical formula for phosphorus trichloride is PCI (little 3). In one or two sentences, explain how would you build a ball
1. 35 answers
2. 4,680 views
Hi all,What is the mass defect of: p + d −→ 3^2He + γ. where 3^2He is just helium-3
1. 0 answers
2. 209 views
How does the mean lifetime of a deuteron (d) in the core of the Sun compare with the mean lifetime of a proton (p) in the core
1. 1 answer
2. 611 views
I was walking along from one place to another, half on the sidewalks and half on the lawns, I was happier on the lawns because I
1. 0 answers
2. 401 views
I narrowed this down to two answers, is it a or d?The picture shows Native American children in front of a school. What shift in
1. 1 answer
2. 884 views
I’m way behind in class and can’t remember this material. The question says “Solve each equation. If exact roots cannot be
1. 1 answer
2. 353 views
Suppose that X and Y are described by a joint PDF which is uniform inside the unit circle, that is, the set of points that
1. 8 answers
2. 3,972 views
The random variable X has a PDF of the formfX(x)={1x2,0,for x≥1,otherwise. Let Y=X2 . For y≥1 , the PDF of Y it takes the
1. 1 answer
2. 2,076 views
If a positive charge moves from a higher voltage to a lower voltage, does the kinetic energy increase or decrease?
1. 0 answers
2. 634 views
Which of the following were the results of the study that the team of psychologists led by thomas fritz found out about the
1. 0 answers
2. 495 views
Which sentence has a misplaced modifier?-When looking out the window, they say the first leave fall. -They gave sandwiches to
1. 2 answers
2. 375 views
A projectile is launched from Earth’s surface and reaches a maximum height of h. Assume that h << RE, where RE is the radius
1. 0 answers
2. 338 views
Find the value of c and d which allow you to keep equality while completing the square5(n^2-4n+c)=f(x)+d
1. 0 answers
2. 198 views
Let X be an exponential random variable with parameter λ=2. Find the values of the following. Use 'e' for the base of the
1. 2 answers
2. 3,296 views
Let X be an exponential random variable with parameter λ=2. Find the values of the following. Use 'e' for the base of the
1. 1 answer
2. 1,119 views
Read the following excerpt from after the winter by Claude McKay.And we will seek the quiet hill Where towers the cotton tree,
1. 4 answers
2. 994 views
Damon is cute
1. 1 answer
2. 261 views
which of the following is greater than 4.3 × 10⁹A. 2.1 × 10⁹ B. 3.2 × 10⁹ C. 5.3 x 10⁹ D. 7.4 × 10⁸ Answers: 1. C
1. 2 answers
2. 418 views
An equation, f, has a domain of all whole numbers and has a range of all real numbers. Does the equation represent a function?
1. 2 answers
2. 812 views
Differentiate the following function from first principlesf(x)= 5x/(3-x)
1. 1 answer
2. 611 views
A is partly constant and partly varies with B. When B =5, A=19 and when B=10, A=34. Find A when B is 7
1. 1 answer
2. 534 views
Calculate the pH of the solution formed when 20mL of 0.100 mol/L HNO_3 is added to 30 mL of 0.050 mol/L KOH.
1. 1 answer
2. 520 views
Hi, I need help with this because I cannot seem to figure it out. History just confuses me. I have to identify whether these
1. 2 answers
2. 441 views
1. Carbon Dioxide gas has a mass of 86.3 grams. If the molar mass of the sample is 44.2 grams, how many moles of CO2 are present
1. 6 answers
2. 694 views
Which of the reactions are spontaneous (favorable)?a. 2H2O(g)⟶2H2(g)+O2(g) Δ𝐺=457 kJ/mol b. CH4(g)+2O2(g)⟶CO2(g)+2H2O(l)
1. 1 answer
2. 3,301 views
π/2∫ sin(x)cos(x) dx π/6
1. 1 answer
2. 320 views
Find all solutions to the given trigonometric equation in the interval 0, 2𝜋 : sin2x=cos2xsinx
1. 1 answer
2. 428 views
i need help!1. How would a weaker jet stream help to cause extreme flooding? a. It would allow storm systems to stall in an
1. 3 answers
2. 4,319 views
One model for the spread of rumors is one where it is assumed that the rate of spread is proportional to the product of the
1. 1 answer
2. 755 views
Please help me!How does climate change affect energy in the atmosphere? a. Decreased ice causes less energy to be reflected. b.
1. 2 answers
2. 1,669 views
Please check my answers.Drag each item to the correct location to show when each occurred. 1. Event that occurred billions or
1. 10 answers
2. 7,686 views
Which factors contribute to ocean acidification and which factors contribute to ocean warming?
1. 0 answers
2. 8,311 views
The quadratic function f is negative only on the open interval (−2, 1/4 ) and its graph passes through the point (−1, −5).
1. 1 answer
2. 509 views
Given that the normal boiling point of CCl4 is 77 °C, which of the following statements about the process below is/are correct?
1. 0 answers
2. 825 views
Which identifies the 16th century movement to address the abuses of the Roman Catholic Church, resulting in the establishment of
1. 2 answers
2. 470 views
At an ocean depth of 20 meters, a buoy bobs up and then down 2 meters from the ocean's depth. Four seconds pass from the time
1. 1 answer
2. 718 views
A researcher observes and records the height of a weight moving up and down on the end of a spring. At the beginning of the
1. 1 answer
2. 937 views
A sine function has the following key features:Period = π Amplitude = 2 Mid-line: y=−2 y-intercept: (0, -2) The function is a
1. 1 answer
2. 863 views
A sine function has the following key features:Frequency = 1/4π Amplitude = 2 Mid-line: y = 2 y-intercept: (0, 2) The function
1. 1 answer
2. 678 views
A sine function has the following key features:Period = 4 Amplitude = 3 Mid-line: y=−1 y-intercept: (0, -1) The function is
1. 1 answer
2. 850 views
A sine function has the following key features:Frequency = 14π Amplitude = 2 Mid-line: y = 2 y-intercept: (0, 2) The function
1. 1 answer
2. 1,001 views
1. Which of the following layers is farthest from Earth's center?a. outer core b. mesosphere c. asthenosphere d. lithosphere 2.
1. 1 answer
2. 1,824 views
If a pizza could have some (or none) toppings out of cheese, pepperoni, ham, sausage, and mushrooms. How many different kinds of
1. 1 answer
2. 824 views
Analyze the results of a cross between two organisms that are both heterozygous for two different genes (AaBb). Use a Punnett
1. 7 answers
2. 3,508 views
I need help on this one question!9. Explain the key training, education, and certification preparation needed for medical
1. 0 answers
2. 1,135 views
Can someone please check my answers?1. Which of the following administrative abilities will the medical assistant not be
1. 19 answers
2. 6,835 views
1. Which of the following layers is farthest from Earth's center?a. outer core b. mesosphere c. asthenosphere d. lithosphere 2.
1. 30 answers
2. 18,562 views
Can I have some help doing some of my math homework?9. Dory bought 2 computers on sale for $210.99 each. He sold them to his
1. 16 answers
2. 718 views
CHECK MY ANSWER PLEASE!?6. Based upon the 2010 census data, the total population of the us is 308,745,538 people. Approximately,
1. 4 answers
2. 3,710 views
Which statements describe an aquifer? Select the three correct answers.-can be created only by digging or drilling -layer of
1. 1 answer
2. 1,015 views
Stumped on this question - please explain!If sin A = 0.35, cos A = 0.94, sin B = 0.58, and cos B = 0.81, what is sin(A + B)? Am
1. 1 answer
2. 2,722 views
I need help, please.1. In a local water supply, lead levels have increased due to corroded pipes. Drag each item to indicate
1. 11 answers
2. 9,719 views
1. Select the three ways water and energy are consumed in the production of store-bought bread.a. Water is consumed to transport
1. 20 answers
2. 4,134 views
1. Which statements describe an aquifer? Select the three correct answers.a. can be created only by digging or drilling b. can
1. 3 answers
2. 1,574 views
What is the value of x?
1. 2 answers
2. 261 views
1. Which statements describe an aquifer? Select the three correct answers.a. can be created only by digging or drilling b. can
1. 16 answers
2. 8,246 views
Hello! I'm a little stumped on a question asking about domain restrictions and why they are necessary to inverse trigonometric
1. 1 answer
2. 834 views
13. A(-5,-4) -> A1 is a glide reflection where the translation is (x,y) -> (x+6,y), and the line of reflection is y=3. What are
1. 3 answers
2. 4,094 views
I need help, please! Only two questions, I don't know the first one.1. Suppose that a report shows that, for a given year, the
1. 6 answers
2. 7,066 views
Which of the following statements about ozone are true? Select the two correct answers.a. Most ground level ozone is released by
1. 6 answers
2. 8,425 views
The reaction between nitric oxide (NO) and oxygen to form nitrogen dioxide (NO2) is a key step in photochemical smog formation.2
1. 2 answers
2. 1,778 views
If vector v has an initial point at (2, 3) and a terminal point at (6, 6) and vector w has an initial point at (3, 2) and a
1. 1 answer
2. 3,524 views
Measure the length across the room where the pennants will br placed( if you measured in feet you will need to convert to
1. 3 answers
2. 505 views
Explain how a clonal population of lymphocytes would be formed when a pathogen invades the body
1. 1 answer
2. 583 views
Monochromatic light (vacuum = 661 nm) shines on a soap film (n = 1.33) that has air on either side of it. The light strikes the
1. 2 answers
2. 788 views
A particle with a charge of -3.2 μC and a mass of 4.0 x 10-6 kg is released from rest at point A and accelerates toward point
1. 1 answer
2. 1,085 views
Using a specific example, prove the vector property: For vectors u⃗ and v⃗ and scalar p > 1, show p(u⃗ +v⃗ )=pu⃗
1. 1 answer
2. 409 views
An aircraft pilot wishes to fly from an airfield to a point lying S20oE from the airfield. There is a wind blowing from N80oE at
1. 1 answer
2. 755 views
Can someone please help me with science test answers!!Why do scientists use models of natural systems? A- Scientist use models
1. 29 answers
2. 7,734 views
Which was a significant reason middle colonies were more favorable to farmers than New England? Select all that apply.A-the
1. 1 answer
2. 1,802 views
Which are the best solutions for reducing the mine production of copper and conserving copper ore? Select the two correct
1. 3 answers
2. 7,485 views
In a fraction with a denominator of 15, which value could the numerator be to produce a repeating decimal?
1. 1 answer
2. 471 views
This for Connery’s academy lesson 11 unit 2(Answers might change over time ) What can you infer from this sentence near the
1. 1 answer
2. 375 views
Can someone check my answers?1. Choose the answer that best matches the word in italics. Samantha tried to look *impassive* when
1. 4 answers
2. 7,222 views
21. What was significant about Mauryan emperor Asoka?I am having trouble answering this.. Please help? :\ This is the only
1. 17 answers
2. 1,971 views
Which statement describes a volcano that is classified as dormant?a. It has never erupted. b. It is not expected to ever erupt
1. 3 answers
2. 6,052 views
Scientists wondered how volcanoes could be located so far from tectonic plate boundaries until one proposed the idea of
1. 10 answers
2. 9,115 views
How do you divide 0.75 by 1.2?
1. 3 answers
2. 512 views
I need help. I have a math problem that says "Divide 0.75 by 1.2.", do I put the 1.2 on the outside and the 0.75 on the inside
1. 3 answers
2. 357 views
A car passed a point on a course at exactly 12 noon and maintained a speed of 60 km/h. A second car passed the same point 1 hour
1. 3 answers
2. 1,118 views
For a certain function, f'(x)=3+x. For what value of x does the function have a stationary point? What type of stationary point
1. 2 answers
2. 551 views
Find the stationary point on the curve y=x^2-1 and show that it is a minimum point by checking the derivative on both sides of
1. 1 answer
2. 710 views
Prove that y=x^3 is monotonic increasing for all x /= 0.
1. 1 answer
2. 769 views
In a physics lab, Kate and Rob use a hanging mass and pulley system to exert a 2.45 N rightward force on a 0.500kg cart to
1. 1 answer
2. 3,621 views
State the domain for which the inverse function is decreasing.Don't really understand this question...
1. 4 answers
2. 487 views
How could we ensure the inverse of y=x^2 is a function?
1. 1 answer
2. 471 views
Is y=(x+1)(x-3) an odd, even, or neither function?f(x)=(x+1)(x-3) = x^2-2x-3 substitute in f(-x) f(-x)=(-x)^2-2(-x)-3 = x^2+2x-3
1. 1 answer
2. 376 views
Sketch one example of each of the following functions of the form y=ax^2+bx+c and y=k(x-b)^2+c, where a,b,c and k are constants.
1. 1 answer
2. 438 views
Does the position of the parabola change when the constant 'k' is changed in the function -- y=kx^2Position remains the same,
1. 1 answer
2. 432 views
Find the intersection points for the circles:(x+2)^2+(y-3)^2=25 and (x-1)^2+(y+4)^2=16
1. 1 answer
2. 403 views
I remember packing and repacking the small container a hundred times, trying to arrange everything so nothing essential would
1. 1 answer
2. 518 views
Nine years ago Sally was three times older Bob. In eight years time, the sum of their ages will be 78. What are their current
1. 1 answer
2. 655 views
H2S + 2NaOH -> Na2S + 2H2O2.48g of sodium hydroxide is dissolved in water and 1.30g of hydrogen sulfide bubbled through the
1. 3 answers
2. 875 views
44.01g o CO2 gas at 25 deg. celcius and 100kPa = 1.00 mol = how many litres?
1. 1 answer
2. 455 views
Lead can be extracted from the mineral galena, PbS. What is the maximum mass of lead that could be obtained from 1.0 tonne (1000
1. 2 answers
2. 1,679 views
How do you balance:C3H8 + O2 --> CO + H2O
1. 2 answers
2. 1,849 views
Potassium phosphide and sulfur are formed when potassium sulfide and phosphorus react.K_2S+P -> K_3P+S (after balancing) =
1. 2 answers
2. 2,883 views
What was the significance of the Battle of Tannenberg in World War I?a.) The incoming British military forces amply supplied the
1. 3 answers
2. 816 views
x/x-2 + x-1/x+1 =-1How do I solve this?
1. 1 answer
2. 976 views
8. How did the Great Depression affect Europe?a. American workers emigrated to Europe in large numbers to find jobs. b.
1. 3 answers
2. 1,021 views

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