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david
Questions and answers by
david
, page 3
Questions (508)
few other questions.
1.) Suppose you expend 430 kilocalories during a long walk, how many liters of ice water at 0 degrees do you
2 answers
607 views
An object is solid throughout. When the object is completely submerged in ethanol alcohol., its apparent weight is 15.2 N. When
4 answers
1,371 views
how do I calculate what temperature is needed to heat 52 grams of ethane to occupy 1200ml?
5 answers
306 views
. What must happen in order for a sound wave to form?
A. An electric current must flow. B. A certain frequency must be reached.
3 answers
756 views
A 52 g mountain climber, start from rest, climbs a vertical distance of 730 m. At top, she is again at rest. In the process, her
5 answers
2,697 views
in outo engine whith no pollusion controls, about 5% of the fuel(assume 100%actane c8H18)is unburned .calculate the mass and
1 answer
378 views
equation of circle passing through P(10,3), Q(11,8), and R(7,14).
1 answer
367 views
prove that out of the rectangles under the curve = e raised to the power of -xsquared on the x axis and upper vertices on the
1 answer
832 views
Find the mean for each set of data. Round to the nearest tenth if necessary.
12, 20, 8, 15, 16, 14, 7, 5, 11, 8, 14 a. 11.8 b.
29 answers
1,036 views
one type of probability used everyday is: a)experienced probability
b)scientific probability c)frequency of occurence d)none of
2 answers
995 views
the solutions to the system of equations y= 2x and y =-x + 3 is
a)2,1 b)(-1,2) c)2,-1) d)(1,2)
5 answers
369 views
the solution to the system of equations y= 2x and y = -x + 3 is
a)2,1 b)(-1,2) c)2,-1) d)(1,2)
4 answers
2,169 views
a christmas tree is 34 feet tall. it casts a shadow 24 feet long. toms christmas tree is standing beside the tree at rockefeller
2 answers
1,107 views
o Find a movie review in an online publication for a movie currently playing in theaters. Post the link to the review for the
3 answers
468 views
joe has a mass of 50 kg and sally has a mads of 30 kg. they sit in class with a separation of 0.5 meters. Find hhe gravitational
3 answers
656 views
francisco designed a triangular garden surrounded by three square gardens. the area of garden c (the largest garden) is 400 sq.
1 answer
486 views
how many grams of ethenol do i need to burn in excess oxygen in order to recover 5.0 g of h2o in a 75% yield
1 answer
361 views
26 1/4- 5 3/10
1 answer
238 views
should the film "Speak" be studied in english 9?Why?
"Speak"by Laurie Halse Anderson
3 answers
448 views
draw me an indifference curve where someone does not value integrity very much compared to income
1 answer
852 views
Adams Enterprises’ noncallable bonds currently sell for $1,120. They have a 15- year maturity, an annual coupon of $85, and a
5 answers
2,180 views
If you inject carbon nanotubes into the body, can we produce antibodies against it?
some ideas: - my answer is yes and no... the
1 answer
395 views
The lengths of what are considered "1 inch bolts are found to be normally distrubted with a mean of 1.001 inches and a standard
3 answers
540 views
the best way to describe classical Greek art would (paragraph) example would include the statue
4 answers
414 views
The amount of money in an account with continuously compounded interest is given by the formula A=Pe^rt , where P is the
3 answers
857 views
A 9ft. Ladder is leaning against a wall and make a 50 degree angle with the ground. How far is the ladder from the base of the
2 answers
486 views
In this summer school class there are 28 male students and 15 female students. An experiment is done that consists of selecting
1 answer
461 views
In our initial survey, the guess at the mean age for the class had a mean of 21.9 and a standard deviation 3.03.
Using this
1 answer
337 views
In our initial survey, the guess at the mean age for the class had a mean of 21.9 and a standard deviation 3.03.
Using this
1 answer
315 views
In our initial survey, the guess at the mean age for the class had a mean of 21.9 and a standard deviation 3.03.
Using this
1 answer
337 views
In our initial survey, the guess at the mean age for the class had a mean of 21.9 and a standard deviation 3.03.
Using this
1 answer
362 views
In a survey, the guess at the mean age for the class had a mean of 21.9 and a standard deviation of 3.03.
Given that Normally
1 answer
394 views
What evidence do you see, in the book Dancing Skeletons, of a holistic study?
3 answers
773 views
X horsepower is equal an 20lb. Object traveling at 90mph. Is it possible to solve for X? and if so, what does X equal?
1 answer
304 views
Damon, thanks for your answer. Consider that the 20lb object is being pulled behind a bid rig truck traveling at 90mph, can it
1 answer
334 views
A uniform beam 6m long and weighing 4kg rest on support p and q placed left and right 1m from each end of the beam. Weight of
3 answers
1,143 views
Hoshi walks 10 meters in 3 seconds.
A. What is her walking rate? B. At this rate, how long does it take her to walk 100meters? C.
23 answers
6,570 views
I need to know how to work this math problem: 3n + (-7) -5n +1
3 answers
768 views
a worker drops a wrench from the top of a tower 90m tall. what is the velocity wgen the wrench strikes the ground?
1 answer
442 views
how many liters of oxygen will react with 124.5 liters of propane
2 answers
492 views
A ramjet is to propel an aircraft at Mach 3 at high altitude where the ambient pressure is 8.5 kPaand the ambient temperature
3 answers
862 views
if there were two proteins samples of exactly the same concentration but one sample contained a protein having a significantly
1 answer
370 views
que planetas tndrian esas mismas manifestaciones
2 answers
90 views
use the given zero to find the remaining zeros of each function.g(x)=x^3+3x^2+25x+75;zero:-5i
1 answer
467 views
5th grade class of 16 students, one-half of the student arrived at school early, one-fourth arrived on time, and one-eighth
4 answers
508 views
what did galileo do in science that made him so famouse
1 answer
396 views
i to write a wellcome letter,wellcoming the new colonies to the United State and ease the fears
2 answers
773 views
why is it necessary to make up to the 250 ml mark while during dilution?
1 answer
277 views
Once a 28 kg crate is in motion on a horizontal
floor, a horizontal force of 51 N keeps the crate moving with a constant
1 answer
679 views
X is a complex number. but X is not equal to 1. X^2011=1
Compute the sum X^(2n)/((x^n)-1) where n=1,2,3...2010
1 answer
264 views
A farmer has 30yd of fencing and wants to enclose an area beside his barn. What are the dimensions of the region of maximal
2 answers
586 views
Use Cavalieri's Principle to find the area of the region.
In the example we see a "leaning tower" with base 'a' and height 'b'.
1 answer
420 views
wats 460 miles and 20 gallons as a unit rate
1 answer
418 views
A(n) 3.91 kg sphere makes a perfectly inelastic collision with a second sphere that is
initially at rest. The composite system
1 answer
753 views
my tank is 38 inches tall 45 inches in diameter. How many gallions does it hold?
1 answer
399 views
Having difficulty with the four frequency ,to use in a table and determine and find the range ..im not understanding whays
1 answer
317 views
Identify the capitalized part of speech in the following sentence:
You should be proud of him, FOR he's a "jolly good fellow."
2 answers
596 views
Draw a quadrangle below.Measure the sides to the nearest 1/2 inch.Write the length next to each side.Find the perimeter.
5 answers
441 views
A truck covers m in 8 s while smoothly slowing down to a final speed of 2.8 m/s.
(a) Find its initial speed. (b) Find its
1 answer
377 views
You have a 1 L container of a gas O 2 at 20°C and 1 atm. Subtracting the weight of the container, what is the mass of the gas?
1 answer
388 views
A circle of radius r is centered at the origin and a rectangle is inscribed. The area of the rectangle as a function is given by
2 answers
489 views
a one meter chain that weights one newton sits on a flat horizontal table that is one meter from the floor. the coefficient of
1 answer
468 views
Make an Maplet that does the simple calculator funtions as addition, subtraction, multiplication, division, factorial, sin(),
1 answer
824 views
When you spend $1 at the grocery store, the store doesn’t keep all of your money as profit. Some of it is reinvested in the
1 answer
474 views
¿Cuál frase es correcta?
El hijo del maestro, quien estuvo en mi clase, es muy inteligente. El hijo del maestro, a quien estuvo
1 answer
437 views
Escribe el cual (la cual, los cuales, las cuales) o lo cual en el espacio.
Nos invitaron a cenar con ellos, ____ fue una buena
1 answer
675 views
Write an equation of the hyperbola with foci (0, ) and (0, 2) and vertices of (0, ) and (0, 1).
2 answers
752 views
Which radioactive emanations have a charge of -1?
beta particles alpha particles gamma rays neutrons
4 answers
1,167 views
Write an equation for a parabola with vertex at (3,- 6) and focus at (3,- 4).
1 answer
386 views
Which of the following properties did Rutherford use in his experiment?
A. the negative charge of the alpha particles and the
2 answers
1,029 views
Surgery vs. placebo for the knee pain: Refer to Example 10. Is Arthroscopic Surgery Better than Placebo? Here we show MINITAB
1 answer
359 views
After watching golf on TV several times with her father, 7-year-old Michelle learned how to swing a club even before she
4 answers
337 views
A rolling ball moves from x1 = 3.2 cm to x2 = -4.2 cm during the time from t1 = 3.8 s to t2 = 6.1 s. What is its average
5 answers
1,762 views
(3,0),0,-4).solve for the following :
1 answer
237 views
(3,0),0,-4).solve for length, standard form.
1 answer
286 views
(3,0),0,-4).solve for length, standard form.thank you
1 answer
235 views
A roller coaster travels 196ft at an angle of 61.1° above horizantally. How far does it travel horizantally?
1 answer
354 views
Write a number which rounds to 66,000 when rounded to the nearest ten thousand
5 answers
1,133 views
A chemical distillation tower, 110 m high is supported by cables of length L that reach from the top of the column to the ground
1 answer
396 views
How many liters of gasoline are there in 165 gal (US) of a methanol-gasoline blend that is 11.0% by volume?
1 answer
346 views
It is estimated that one third of one per cent of the Earth’s surface receives more energy from the sun than the total
1 answer
400 views
It is estimated that one third of one per cent of the Earth’s surface receives more energy from the sun than the total
1 answer
454 views
explain the term carbonate error ..
1 answer
254 views
Why can a water-ethanol solution be used for recrystallization but not a water-hexane solution?
2 answers
802 views
The solubility of acetanilide in hot water (5.5 g/100 mL at 100C) is not very great, and its solubility in cold water (0.53
4 answers
4,495 views
Carborundum (silicon carbide) boiling chips are better than calcium carbonate chips in the recrystallization of an unknown,why ?
2 answers
637 views
Carborundum (silicon carbide) boiling chips are better than calcium carbonate chips in the recrystallization of an unknown,why ?
4 answers
1,528 views
• A student crystallized a compound from benzene and observed only a few crystals when the solution cooled to room
1 answer
829 views
A chemist conducted a recrystallization on 18.5 g of a solid and collected 12.5 g from the first, and 2.7 g from the second
2 answers
1,054 views
A hot recrystallization solution is not filtered unless absolutely necessary.give reason.
4 answers
1,982 views
An Erlenmeyer flask containing a hot solution is not tightly stoppered to prevent solvent loss during cooling. give reasons.
4 answers
1,502 views
The suction of a vacuum filtration apparatus is broken before the vacuum is turned off.give reason.
3 answers
1,399 views
Vacuum filtration is avoided when crystals are isolated from a very volatile solvent.
why?
4 answers
1,145 views
Four boxes of cereal are to be selected at random from a continuous process that
fills boxes labeled "Contents: 340 g." The
2 answers
543 views
If a rock is thrown upward on the planet Mars with a velocity of 13 m/s, its height in meters t seconds later is given by y =
3 answers
2,268 views
A chemical engineer designed a 625 ft long tailings channel to have a rhombus cross-section that is 9.5 ft deep, with walls
1 answer
374 views
A regular triangular pyramid has an altitude of 15.0 m and the base is 8.00 m on a side. Find the area of a section made by a
1 answer
840 views
This is the Crailsheim water tower in Baden-Württemberg, Germany. Its construction was completed in 1912.
The base of the tower
1 answer
460 views
i have 8 coins in my piggy bank. I have twice as many dimes as I have quarters. I have twice as many pennies as I have dimes. I
1 answer
364 views
it is not less than 40.
it is not greater than 70. it is not an odd number. it does not have an even number in the tens place. it
1 answer
419 views
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