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Luke
Questions and answers by visitors named
Luke
, page 2
Questions (209)
A 0.565 kg wood block is firmly attached to a very light horizontal spring (k = 185 N/m) as shown in Fig. 6-40. It is noted that
1 answer
498 views
In a common test for cardiac function (the "stress test"), the patient walks on an inclined treadmill (Figure 6-46). Estimate
7 answers
5,187 views
Two satellites, X and Y, orbit a planet in nearly circular orbits. Satellite X takes 20 days to complete one orbit, while
2 answers
702 views
Find the Least Common multiple of the two expressions: 24x^2-96 & 18x^2+18x-36
1 answer
408 views
A. She should scrap her present budget and start all over again.
B. It is clear that Lisa is just one of those people for whom
1 answer
371 views
John's gross income is $1,000 per month. Based on an assumption that 25% of his gross income will be withheld, he can expect his
1 answer
440 views
Ways to have energy in your house without having to use fossil fuels?
Use the sun has your light for solar energy Have solar
4 answers
580 views
Im doing a project about a book and here is one of my instructions.
In this third circle write four quotations from The Lightning
9 answers
379 views
"In this third circle, write four quotations from The Lightning Thief that relate to the center sketch. Document this quotation
1 answer
444 views
How do you play a dotted quarter note following that an eigth note tied with a quarter note???
1 answer
380 views
Why did Karjam Get a flat tire.
4 answers
681 views
Suzie (of mass 76 kg) is roller-blading down
the sidewalk going 12 miles per hour. She notices a group of workers down the
3 answers
768 views
A card is drawn at random from a full pack of playing cards. It is not put back. A second card is then drawn from the same pack.
1 answer
453 views
The probability of Joe is at work is 49%. The probability Joe is at home is 25%. What is the probability Jow is neither at Work
1 answer
439 views
A small block on a frictionless surface has a mass
of 70 g. It is attached to a massless string passing through a hole in a
4 answers
629 views
comparing and contrasting why is sodium hydrogen carbonate an effective antacid but sodium hydroxide is not?
1 answer
475 views
if 60% of students in the class were wearing sport shoes and 40% dress shoes, does it mean that everybody in the class were
1 answer
437 views
An unsecured astronaut is floating in deep space. He switches on a hand held drill. The drill bit begins rotating clockwise with
2 answers
588 views
When 4.76 g of a solid mixture composed of NH4Cl and CaCl2 was dissolved in 100.0 mL of water, the temperature of the water rose
5 answers
1,001 views
How much heat (in kilojoules) is liberated by the combustion of 7.01 g of magnesium? Include the sign in your answer. H+-1203kJ
2 answers
477 views
How much methane, in grams, must be burned to release 542 kJ of heat? H=-802kJ
4 answers
3,125 views
Microwaves are used to heat food in microwave ovens. The microwave radiation is absorbed by moisture in the food. This heats the
7 answers
2,363 views
In the spectrum of a specific element, there is a line with a wavelength of 656 nm. Use the Rydberg equation to calculate the
2 answers
1,118 views
Use an enthalpy diagram to calculate the lattice energy of CaCl2 from the following information. Energy needed to vaporize one
5 answers
6,810 views
Some time ago, a U.S. citizen traveling in Canada observed that the price of regular gasoline was 0.771 Canadian dollars per
2 answers
702 views
How many grams of water could have its temperature raised from 25 ºC (room temperature) to 100 ºC (the boiling point of water)
3 answers
895 views
14) A lawn fertilizer is rated as 7.04% nitrogen, meaning 7.04 g of N in 100 g of fertilizer. The nitrogen is present in the
2 answers
667 views
13) Mercury is an environmental pollutant because it can be converted by certain bacteria into the very poisonous substance
4 answers
2,512 views
12) Naturally occurring argon is composed of 0.3365% of 36Ar (atomic mass, 35.9675 u), 0.0632% of 38Ar (atomic mass, 37.9627 u),
4 answers
1,125 views
18) Aspirin is a monoprotic acid called acetylsalicylic acid. Its formula is HC9H7O4. A certain pain reliever was analyzed for
2 answers
1,237 views
24) It was found that a 20.00 mL portion of a solution of oxalic acid, H2C2O4, requires 6.69 mL of 0.200 M K2Cr2O7 for complete
4 answers
1,845 views
A mixture of N2, O2, and CO2 has a total pressure of 928. torr. In this mixture the partial pressure of N2 is 31.0 cm Hg and the
2 answers
580 views
Methane is formed in landfills by the action of certain bacteria on buried organic matter. If a sample of methane collected from
7 answers
566 views
When a sample of neon with a volume of 683 mL and a pressure of 0.792 atm was heated from 19.0 to 76.0 °C, its volume became
4 answers
428 views
A mixture of ammonia and oxygen is prepared by combining 0.330 L of NH3 (measured at 0.790 atm and 22°C) with 0.210 L of O2
2 answers
773 views
How many milliliters of O2 are consumed in the complete combustion of a sample of hexane, C6H14, if the reaction produces 325 mL
4 answers
2,123 views
Methane is formed in landfills by the action of certain bacteria on buried organic matter. If a sample of methane collected from
3 answers
1,231 views
A mixture of ammonia and oxygen is prepared by combining 0.250 L of NH3 (measured at 0.700 atm and 20°C) with 0.160 L of O2
3 answers
493 views
A solution of acetic acid, CH3COOH, has a concentration of 0.218 M and a density of 1.00 g mL-1. What is the molality of this
4 answers
2,181 views
At 21.0 °C, a solution of 23.71 g of a nonvolatile, nonpolar compound in 30.64 g of ethylbromide, C2H5Br, had a vapor pressure
4 answers
636 views
Benzene reacts with hot concentrated nitric acid dissolved in sulfuric acid to give chiefly nitrobenzene, C6H5NO2. A by-product
7 answers
889 views
A saturated solution is made by dissolving 0.325 g of a polypeptide (a substance formed by joining together in a chainlike
4 answers
696 views
A saturated solution is made by dissolving 0.252 g of a polypeptide (a substance formed by joining together in a chainlike
3 answers
1,262 views
Benzene reacts with hot concentrated nitric acid dissolved in sulfuric acid to give chiefly nitrobenzene, C6H5NO2. A by-product
2 answers
868 views
A proton, traveling with a velocity of 6.8 × 106 m/s due east, experiences a magnetic force that has a maximum magnitude of 8.6
1 answer
498 views
A proton, traveling with a velocity of 6.8 × 106 m/s due east, experiences a magnetic force that has a maximum magnitude of 8.6
1 answer
487 views
Show that "¬p Λ q is logically equivalent to p → ¬q" . I'm not sure if the conditional identity is correct, but what I did
4 answers
745 views
5/7 * 9/10 = 9/14
Should my answer be 45/70 or 9/14?
3 answers
323 views
2/11 * 264 = 528/11
Is the answer correct?
1 answer
356 views
A rectangle is inscribed into the region bounded by the graph of f(x)=(x^2-1)^2 and the x-axis, in such a way that one side of
4 answers
1,146 views
Find the point on the curve y^2=4x closest to the point (8,0).
My Work: Using the Distance formula- my answer i got was
4 answers
481 views
Find the point on the curve y^2=4x closest to the point (8,0).
My Work: Using the Distance formula- my answer i got was
4 answers
447 views
Carl is looking to buy a farm. While looking at a potential property, Carl wants to know the height of the silo. He measures a
1 answer
462 views
I am given triangle EDF with angles E and F being congruent. What is the perimeter of the triangle if ED= 2x+8, EF= 3x-6, and
2 answers
624 views
A student was required to prepare 250.0 mL of a hypochlorous acid/sodium hypochlorite buffer in which the concentration of the
3 answers
845 views
The curves y=sinx and y=cosx intersects twice on the interval (0,2pi). Find the area of the region bounded by the two curves
2 answers
555 views
If a cost of a function is C(x) = (49 ln x) / (28-3x), find the marginal cost when x = 7
3 answers
301 views
Is this sentence punctuated correctly?
At elementary school, my teacher delighted in handing me worksheets crowded with row upon
10 answers
591 views
One phone company charges $12 per month plus $.05 per minute after the first 500 minutes. A second phone company charges $10 per
2 answers
630 views
A roulette wheel has 38 slots, numbered 0, 00, and 1 to 36. Two slots are green, 18 of the others are red, and 18 are black.
a)
3 answers
1,738 views
The scale model of a rectangular patio will be enlarged by a scale factor of 2.5 to create the actual patio. The actual patio
2 answers
752 views
Find the volume of the solid obtained by rotating the region under the graph of the function f(x)=2x+1 about the x-axis over the
2 answers
907 views
How do I find the vertical and horizontal asymptotes of
f(x)= (x+2)/(5x^2) Wouldn't one of them be (I,-I)? How do I solve this?
2 answers
554 views
Pineapple has high requirements for the fertilizer elements nitrogen (N), potassium (K), and iron (Fe), and relatively low
2 answers
536 views
-1.4b + 10= -18
1 answer
248 views
in a class, 3/5 of the girls and 1/6 of the boys wear spectacles. If 3/4 of those who are wearing spectacles are girls, what
2 answers
500 views
Two buckets of sand hang from opposite ends of a rope that passes over an ideal pulley. One bucket is full and weighs 110 N ;
3 answers
1,180 views
Fe2O3 + Fe + H2SO4 → FeSO4 + H2O
How would I balance this using oxidation numbers? Is the Fe2 being reduced and the Fe being
2 answers
775 views
Two tetrahedral dice are thrown; one is red and the other is blue . The number on which each lands is noted, the faces being
3 answers
1,258 views
how does a rodeo star get around?
13 answers
3,155 views
From a group of 10 people, 5 men and 5 women, six are to be chosen to serve on a committee.
a) In how many ways can the committee
4 answers
1,008 views
5. A grating with 400 lines per mm is illuminated with light of wavelength 600.0 nm.
(a) Determine the angle at which the maxima
2 answers
1,106 views
Two numbers add up to 20. The sum of their square is 20 less than 3 times their product. Formulate equations and find the
1 answer
439 views
A rock is thrown straight up at 22.0 m/s from a roof of a 30.0 m tall building. After rising, the rock falls on the street
4 answers
1,472 views
If a solid state lithium battery produced 5.00 mA in 8.25 h, then the mass, in milligrams, of lithium consumed would be?
2 answers
495 views
If a current of 3.00 A is applied to a cell containing a 400g copper anode, determine the final mass of the copper anode after
2 answers
540 views
A 2.80-g sample of haematite ore containing Fe3+ ions was dissolved in a concentrated acid and the solution was diluted to 250
2 answers
567 views
If angle x and y are in the same quadrant , and sin x=3/5 and cos y=5/13, determine the value of sin(x-y) .
2 answers
912 views
Has a negative -5/13
Steve. If angles x and y are in the same quadrant and sin x =3/5 and cos y= -5/13 determine the value of sin
1 answer
364 views
1. Silicon dioxide reacts with carbon upon heating to produce silicon carbide (SiC) and carbon monoxide.
SiO2(s) + 3C(s) = SiC(s)
4 answers
2,036 views
A chemical substance is draining from a conical filtering system at a rate of 100 cubic centimeters per minute into a
2 answers
524 views
The most effective buffer solutions have equal concentrations of salt and acid (or base). Find the pH of a buffer solution with
2 answers
661 views
Drag and drop the correct justifications into the boxes.
4(x−2)+1=9 : subtraction property of equality 4x−8+1=9 :combine like
2 answers
599 views
Use the ion-electron method to write and balance the net ionic equation for each of the following reactions.
MnO41- + Sn(OH)31-
2 answers
598 views
A bus travels 70km/h for xhours and then at 80km/h for (0.5x+3) hours. If the total distance traveled is 460km, find x to the
1 answer
324 views
A bus travels at 70km/h for x hours and then at 80km/h for 0.5(x+3) hours. the total distance travelled was 460km. Determine x
1 answer
334 views
Use geometry to evaluate integral[-3,3] for:
f(x)= { √(4-(x+1)^2), -3≤x≤1 { |x-2| - 1, 1<x≤3 A. 2pi + 1 B. 2pi - 1 C. pi
4 answers
574 views
Give a brief summary of Home Place by guy vanderhaeghe.
2 answers
518 views
Sorry if this is a silly question, but can anyone algebraically explain to me how these two equations are equivalent.
360/(180-x)
1 answer
351 views
Choose the pairing that is an example of archival materials a acid free paper such as superglue basalt construction paper salt
6 answers
1,185 views
Choose the pairing that is an example of archival materials a acid-free paper superglue be salt construction paper for the glass
3 answers
997 views
And angle measures 53° what are the measures of the angles complement and supplement a complement 37° supplement 137° be
17 answers
4,940 views
The measure of angle a is 124° what is the correct classification for angle a is it
Acute right obtuse straight
7 answers
1,132 views
A garden hose is used to fill a drum with water. The hose is held 0.88 m above the ground. The cross-sectional area of the 2.0
3 answers
1,043 views
Whats a funny acrostic joke for beryllium
1 answer
412 views
What will be the luck numbers 5 out 90 at a given period of time?
1 answer
267 views
A driver of a car going 95 km/h suddenly sees the lights of a barrier ahead. It takes the driver 0.55 s before he applies the
1 answer
356 views
A driver of a car going 95 km/h suddenly sees the lights of a barrier ahead. It takes the driver 0.55 s before he applies the
3 answers
556 views
There are 40 oranges in a box 3 twelfths of them are gone off how many are gone off
2 answers
204 views
John is at a local bait shop; he wants to buy bait for his fishing trip. At the store, they are selling live bait for $12 a
4 answers
1,105 views
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