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Stephen
Questions and answers by visitors named
Stephen
Questions (137)
A hiker started to climb up the hill at 6:00 am and either kept climbing up or rested at some place(s). He reached the top at
5 answers
asked by
Stephen
1,835 views
A class has 10 boys and 12 girls. In how many ways can a committee of four be selected if the committee can have at most two
6 answers
8,475 views
In an experiment, 23.0 g of ice at –25°C is converted into steam with a temperature of 124°C. How much heat is required for
2 answers
610 views
Given the enthalpies of formation for the following substances, determine ƒ´Hrxn for
Cl2(g) + C2H2Cl2(g) „_ C2H2Cl4(g)
3 answers
681 views
At which point is more silt in the water in the mountains or on flatland why
9 answers
1,623 views
Calcium carbonate of mass 10g was heated until there was no further change
A. Write an equation for the reaction B. Calculate the
4 answers
1,309 views
In triangle ABC,A=54.2°,B=71.8°,a=12.4cm,find b
6 answers
411 views
Why is it unlikely to find earthquakes at depths greater then 300km? (something to do with the athenosphere)
According to the
1 answer
530 views
Consider a space habitat that consists of a rotating cylinder. If the variation in g between one's head and feet is to be less
1 answer
606 views
How do you add this?
-5/6 + 1/2 -5/6 + 1/2= 8/6 I know to find the lowest common denominator,which is 6, but the numerator is
1 answer
481 views
The lowest recorded temperature in Sweden is -38 degrees and the lowest
recorded temperature in Russia is -68 degrees. How much
1 answer
517 views
Proofread Please!!!
¡El acontecimiento que ha ocurrido hoy eso ha dado lugar a este día que era extraordinario ha sido que he
2 answers
596 views
" A condition of gravitational and bouyant equilibrim between earth's litosphere and asthenosphere" ... is what?
1 answer
388 views
What is the smallest cube that is diveisible by 16 but is not a perfect square?
1 answer
331 views
How can you tell that Iron and Sulphur have formed a mixture before they are heated?
1 answer
414 views
At the school store Juanita bought two books and a backpack for a total of $26 before tax. Each book cost less than $8. Find
2 answers
652 views
How do you find the definite integral of an absolute function?
∫_0^3|2x-3| lower limit= 0 upper limit = 3
5 answers
653 views
I instructed the patient to return tomorrow.
return = adverb modifying verb is tomorrow. The gentleman was unusually talkative
3 answers
804 views
I want to improve the flow of this sentence. I would greatly appreciate any insight, minor or major. Here is the sentence, which
2 answers
458 views
A block of mass M hangs from a rubber cord. The block is supported so that the cord is not stretched. The unstretched length of
6 answers
1,341 views
How much heat energy is released to surrounding when 15.0 g of water at 35°C is converted into ice with a temperature of
3 answers
457 views
In an experiment, 230 kJ of heat energy are released to the surroundings when steam is converted to liquid water. Calculate the
2 answers
561 views
What will be the final temperature of a 22.0 g piece of iron (Cp = 25.09 J/K • mol), initially at 25°C, if it is supplied
1 answer
401 views
Given the reaction shown below, calculate:
(a) The amount of NO2, in grams, generated from reactants if 300.23 kJ of heat energy
2 answers
571 views
If I invest £25,000 a year each year for 16 years and get a 5% return what will my total capital be ?
1 answer
283 views
Three gases (8.00 of methane, , 18.0 of ethane, , and an unknown amount of propane, ) were added to the same 10.0- container. At
2 answers
1,016 views
What do you call a high island that rises from the deep ocean floor on a volcanic foundation?
1 answer
306 views
What do you call a high island that rises from the deep ocean floor on a volcanic foundation?
1 answer
345 views
In a patent-driven market, using the concept of minimum efficient scale of production, explain what would happen to competiton
1 answer
409 views
What is the answer to: The plane was purchased new in 2006; therefore, x = 0 represents the year 2006. X - axis (horizontal)=
1 answer
431 views
The table below shows the measured dimensions of a prism, and the maximum and minimum possible values based on the greatest
4 answers
3,011 views
Add parentheses to 9+8*7-6*5+4*3+2 so that the value of the expression is 105
1 answer
337 views
Helping my child study. Are there any online guides that can help me teach how to predict the products of a reaction.
i.e. _
1 answer
419 views
Helping my child study. Are there any online guides that can help me teach how to predict the products of a reaction.
i.e. _
3 answers
516 views
Helping my child study. Are there any online guides that can help me teach how to predict the products of a reaction.
i.e. _
4 answers
971 views
5+2(4y-4)=3(2y-1)solve
1 answer
328 views
2/3(5/4+2d) + 1/3=2/5
1 answer
414 views
When 15.3g of NaNO3 was dissolved in water inside a constant pressure
calorimeter, the temperature fell from 25.00 °C to 21.56
3 answers
1,103 views
Cell formulas are usually displayed in the cell, while the contents are displayed in the name box T or F ??
1 answer
448 views
A rectangular box has a square cross-section and the sum of its length and the perimeter of this cross-section is 2 m. If the
2 answers
817 views
A 70 kg man carrying a 10 kg suit case climbing a ladder of 5 m in two minute, power developed by the man is (g=10 m/s2 ).?
2 answers
518 views
a/b + b/a = x
a/b - b/a = y in the equation above, if a is (not equal) to 0 and b is (not equal) to 0, which of the following
3 answers
297 views
The sum of two numbers that differ by one is x. In terms of x, what is the value of the lesser of the two numbers?
a. x+1/2 b.
3 answers
331 views
AB+BA = 1A4
In the correctly worked out addition problem above, A and B represent two different digits. What digit does A
2 answers
597 views
a/b + b/a = x
a/b - b/a = y in the equation above, if a is (not equal) to 0 and b is (not equal) to 0, which of the following
1 answer
272 views
what is the french of I love you?
3 answers
432 views
A) What is the velocity of the flowerpot when it strikes the ground? The acceleration of gravity is 9.81 m/s2 ?
B) How much time
3 answers
656 views
A flowerpot falls from a window sill 37.6 m above the sidewalk.?
A) What is the velocity of the flowerpot when it strikes the
3 answers
1,161 views
I am a number between 0.23 and 0.31. I have 3 digits. All of my numbers are the same. What number am I?
1 answer
252 views
I am a number between 0.23 and 0.31. I have 3 digits. All of my numbers are the same. What number am I?
3 answers
302 views
A car has a mass of 1.34 × 10^3 kg.
If the force acting on the car is 6.46 × 10^3 N to the east, what is the car’s
1 answer
362 views
A horizontal force of 234 N causes a 350 N object to accelerate across a horizontal floor. if the coefficient of friction is
1 answer
411 views
Find the amount of solute deposit when 200 cm 3 of the solution is cooled from 55oc to40oc.
2 answers
496 views
The expression log(x^n/ radical y)is equivalent to
1. n log x - 1/2 log y 2. n log x- 2 log y 3. log (nx) - log (1/2y) 4. log
5 answers
3,027 views
y = √3x + 2 cos(x), 0 ≤ x < 2π
Find a derivative y'.
1 answer
346 views
A 650N man jumps out of a window into a fire net 8m below. The net stretches 1.5m before bringing the man to rest and tossing
2 answers
592 views
A perfectly cylindrical container standing upright with a top and bottom(an oil drum or coke can for example) of area A has an
2 answers
535 views
25 milliliters of tartaric acid solution is titrated against 31 milliliters of NH4OH. What is the normality of the NH4OH?
1 answer
437 views
what is the result of using 75g of dihydronoxybutanedioric acid in one liter of H2O in a titration?
I do not have a answer.
4 answers
1,056 views
25mL of tartaric acid solution is titrated against 31mL of NH4OH. What is the normality of the NH4OH? Please explain how to work
1 answer
462 views
I have been knocking around this question for what seems to be an eternity. We have not gotten that far in this class so this is
1 answer
347 views
14) Given the following vectors, find the magnitude and direction:
• A = 47 m and the angle is 0° • B = 62 m and the angle
1 answer
430 views
How do i do them? :l
7. At 2:00 P.M., the angle between the hour and minute hands on a clock is 60° (approximately 1.05
2 answers
564 views
1. The curve y=10/2x+1 -2 intersects the x-axis at A. The tangent to the curve at A intersects the y-axis at C.
(i) Show that the
3 answers
2,743 views
How many Liters of a 5.00 M Zn(NO3)2 would be needed to react with 200 g of (NH4)2S?
1 answer
288 views
Given Zn(NO3)2 + (NH4)2S = ZnS + 2NH4NO3 (molar mass of Zn(NO3)2 189 g, molar mass of (NH4)2S 68 g), what is the molarity of a
2 answers
913 views
If you add 100 g of salt to 5 Kg of cooking water, how will it effect the boiling point? (molar mass of NaCl 58.5 g,
1 answer
400 views
Critically discuss 5 ways in which the environment problems impacts on the community.
1 answer
444 views
I need help with debug
Debug06-02 // Program lets user input scores on four tests // Average is computed and letter grade is
3 answers
1,435 views
Use a sum-to-product formula to rewrite cos5w+cos2w as a product.
2 answers
687 views
How did the discovery of neutrons change the atomic model?
4 answers
964 views
What type of a bond is a metal cation likely to form?
1 answer
406 views
a boy notices a special needs student sitting by himself during recess. How can he get the student involved in a meaningful way?
3 answers
427 views
what part of the carbon process is responsible for the release of carbon at a p[power plant
combustion photosynthesis digestion
4 answers
862 views
Solve using the annihilator method Y"-8y'+20y=5xe^(4x) sin (2x)
2 answers
498 views
If there is a grid and you are going to draw three different rectangles so that each has an area of 12 square units and they all
2 answers
1,003 views
The number 2 is chosen to begin a ladder diagram to find the prime factorization of 66. What other numbers could have been used
9 answers
1,223 views
Pain says she should get $3 discount on the price of each shirt and a $3 discount on the price of each pair of jeans. Part 1
4 answers
820 views
how many molecules of N2 could fit in a 2.00L soda bottle at 23C and 755mmHg
3 answers
1,786 views
Ranee keeps £360 in a savings account for a year. At the end of the year she gets £13.50 in interest.Work out the interest
6 answers
342 views
In a sale of electrical equipment, the price of all goods is reduced by .
Work out the sale price of the following. a A DVD
7 answers
582 views
A football match between United and City is watched by 24 000 spectators.
Of the 24 000 spectators, 14 112 support United and
6 answers
515 views
BH Holding Inc. is considering undertaking a capital project, costing $8 million today. in addition, the project will be
2 answers
546 views
Rationalize numerator.
((sqrt7)-3/4)(sqrt7+3/sqrt7+3) I got that the answer is 7-9/4sqrt7+12= -2/4sqrt7+12
1 answer
360 views
5^-1/2 x 5x^5/2(5x)^-3/2=
1/sqrt5 x sqrt5x^5 x 1/sqrt5x^3= ??? I need to simplify and I need help understanding what the next
5 answers
437 views
Solve the complex fraction
((t^2/sqrt t^2+1)-sqrt t^2+1))/t^2 Is the LCD to multiply by sqrt t^2+1????? Please help!
1 answer
409 views
Simplify
5^-1/2 * 5x^5/2 (5x)^-3/2 My final answer was x/sqrt5
5 answers
542 views
t^2/�ã(t^2+1) - �ã(t^2+1)
------------------------- t^2 Is the final answer -1/t^2 sqrt(t^2+1)
3 answers
350 views
Factor by removing the common factor with the lesser exponent
2x(x-5)^-3 -4x^2(x-5)^-4 I don't really know how to do this. The
3 answers
534 views
Simplify.
-x^3(1-x^2)^-1/2 -2x(1-x^2)^1/2 ------------------------------- x Do I first start by getting rid of the negative
1 answer
366 views
Change these fractions to twentieths and then arrange them in order of size, smallest first.
7/20 2/5 3/4 7/10
7 answers
4,114 views
Why did the Spanish and French start fighting?
Question from Social Studies weekly week 8 for 4th graders.
7 answers
1,064 views
Altitudes $\overline{XD}$ and $\overline{YE}$ of acute triangle $\triangle XYZ$ intersect at point $H$. If the altitudes
12 answers
4,347 views
Point $G$ is the midpoint of median $\overline{XM}$ of $\triangle XYZ$. Point $H$ is the midpoint of $\overline{XY}$, and point
2 answers
638 views
The question goes as follows:
Two trains are moving toward each other at speeds 17 mph and 43 mph. How far apart are they 1
5 answers
1,830 views
How does the boiling point of ethane (CH3CH3) compare with that of ethanol (CH3CH2OH)?
1. The boiling point of ethane is higher
5 answers
3,858 views
What effect will dissolving larger amounts of salt in a beaker of water have on the concentration and conductivity of the
6 answers
2,041 views
Context: The function v(t) represents the velocity of a particle moving along a horizontal line at any time, t, greater than or
4 answers
1,277 views
Just out of curiosity, is it okay to use the phrase "and so" in a sentence? Like "Johnathan knew that he had to help the boy
4 answers
575 views
Is the word "and" still considered a coordinating conjunction if it is being used in a list rather than to connect two
4 answers
911 views
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