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Questions Asked on September 29, 2013

a body is under of 2 forces 7n and 10n find the resultant of 2 forces if (a)the forces are parallel and act in thesame direction
1. 12 answers
2. asked by johnson
3. 5,488 views
An oil prospector will drill a succession of holes in a given area to find a productive well. The probability that he is
1. 2 answers
2. asked by Katy
3. 5,236 views
How many moles of carbon are needed to react with 525 g of hematite2FeO3+6C->4Fe+3Co2 idk how to convert moles of fe2o3 to
1. 2 answers
2. asked by Julie
3. 5,032 views
A bottle of 12.0 M hydrochloric acid has only 35.7 mL left init. What will the HCl concentration be if the solution is diluted
1. 1 answer
2. asked by Alexandra
3. 4,184 views
Consider the reaction2 Al2O3(s) ! 4 Al(s) + 3 O2(g) . �H = +3339.6 kJ/mol What is the change in heat when 0.455 L of a 3.60 M Al
1. 1 answer
2. asked by Anonymous
3. 3,973 views
Assume 10% of the engines manufactured on an assembly line are defective. If engines are randomly selected one at a time and
1. 1 answer
2. asked by Katy
3. 3,953 views
What are the benefit of letting the solutions of HCl(aq) and NaOH(aq) sitovernight?
1. 6 answers
2. asked by Quratulann
3. 3,015 views
The political movement that brought Africans together in the 1950s was known as ________.a. imperialism b. salt trade c.
1. 29 answers
2. asked by A
3. 2,941 views
At the beach, 3 children pull on a floating toy. Child 1 plus with a force of 15N [N 24°E], child 2 pulls south and child 3
1. 1 answer
2. asked by keisha
3. 2,827 views
Ms. Santiago has many pens in her desk drawer. She says that if you divide the total number of pens by 1, 2, 3, 4, 5, or 6, you
1. 8 answers
2. asked by Shohanur
3. 2,796 views
A store has 2 times as many hooded sweatshirt as crewneck sweatshirt. The total number of sweatshirts is 36. How many hooded
1. 3 answers
2. asked by Ms.Vargas
3. 2,794 views
A mixture of C3H8 and C2H2 has a mass of 2.6g . It is burned in excess O2 to form a mixture of water and carbon dioxide that
1. 2 answers
2. asked by bobert
3. 2,696 views
A cyclist maintains a constant velocity of5.2 m/s headed away from point A. At some initial time, the cyclist is 251 m from
1. 1 answer
2. asked by Monica
3. 2,532 views
You are traveling at a constant speed υM, and there is a car in front of you traveling with a speed υA You notice that
1. 3 answers
2. asked by kolam
3. 2,430 views
Magnesium metal burns in oxygen to form magnesiumoxide, MgO. (a) Write a balanced equation for the reaction Why is it
1. 2 answers
2. asked by Julie
3. 2,396 views
You had $22 to spend on four raffle tickets. After buying them you had $6. How much did each raffle ticket cost?
1. 3 answers
2. asked by Brendan
3. 2,358 views
If 26.0mL of AgNO 3 is needed to precipitate all the Cl −ions in a 0.750-mg sample of KCl (forming AgCl), what is the molarity
1. 1 answer
2. asked by ally
3. 2,286 views
Word Problem page 19John and Al are in a 15 km race. John averages 4.4 m/s during the first half of the race and then runs at a
1. 2 answers
2. asked by Walter
3. 2,229 views
In the early 1900s, Alfred Wegener noticed that some of the Earth's continents looked like they might fit together like a jigsaw
1. 11 answers
2. asked by M
3. 2,156 views
1) A billboard on level ground is supported by a brace, as shown in the accompanying diagram. The measure of angle A is 15
1. 1 answer
2. asked by lili
3. 2,059 views
Given the forces Fa= 2.3 N [S 35° W], Fb= 3.6N [N 14° W] and Fc= 4.2N [S 24°E] calculate the following:Fa + Fb + Fc
1. 2 answers
2. asked by keisha
3. 1,833 views
A microbiologist measures the speed of a swimming bacterium. The bacterium covers a distance of 2.16 microns in 5.0 seconds. The
1. 2 answers
2. asked by Mary
3. 1,453 views
Carbon monoxide reacts with oxygen to formcarbon dioxide by the following reaction: 2CO(g) + O2(g) --> 2CO2(g) �change in H for
1. 1 answer
2. asked by Anonymous
3. 1,450 views
How long would it take for 2.2 x 10^-4 mol H2 to effuse through the same orifice as the 2.2x 10^-4 mol N2? (It takes 105s for N2
1. 3 answers
2. asked by Nikki
3. 1,411 views
Find the measure of each angle.Angle A is half as large as its complement angle B
1. 1 answer
2. asked by J
3. 1,409 views
A group medical practice has 40,000 patients. Charts vary in thickness from 1/4 to 1 inch thick. The average of all charts is
1. 3 answers
2. asked by Lysa
3. 1,362 views
What is the compound formula forCation: Na+ and Anion: CN-
1. 1 answer
2. asked by Sabrina
3. 1,320 views
Vector has a magnitude of 8.10 units and makes an angle of 52.0° with the positive x-axis. Vector also has a magnitude of 8.00
1. 1 answer
2. asked by Griet
3. 1,311 views
Word Problems pages 18-19A sailboat heads north at 3 m/s for 1 hour and then tracks back to the southeast (at 45 degrees to
1. 1 answer
2. asked by Walter
3. 1,270 views
The question asks me to find the absolute error using the true value=.1025M, and the mean=.1077The answer I got was .0052...how
1. 1 answer
2. asked by kristine
3. 1,262 views
Concentrated sulfuric acid (18.3 M) has a density of 1.84 g/mL.How many moles of H2SO4 are in each milliliter of solution?
1. 1 answer
2. asked by Anonymous
3. 1,249 views
As you look out of your dorm window, a flower pot suddenly falls past. The pot is visible for a time t, and the vertical length
1. 0 answers
2. asked by koler
3. 1,240 views
How would you solve these compound inequalities word problems?1. The human ear can distinguish sounds between 20Hz and 20,000
1. 1 answer
2. asked by Pam
3. 1,222 views
Calculate the density of a substance in pennyweights that has a volume of 0.287hogsheads and a mass of 55.25kg.1 pennyweight=
1. 1 answer
2. asked by Kacie
3. 1,219 views
how do you find the concentration of an ion remaining after a reaction is complete???
1. 1 answer
2. asked by Anonymous
3. 1,212 views
Problem 4- Speedy car, driving at 30 m/s. The driver suddenly observes a slow-moving van 155 m ahead traveling at 5 m/s in the
1. 2 answers
2. asked by Maryam
3. 1,205 views
Two protons in a molecule are 3.80 multiplied by 10-10 m apart. Find the electrical force exerted by one proton on the other.Mag
1. 0 answers
2. asked by physics
3. 1,187 views
I am a grade 11 student and want to follow careers linked to geograpy . My problem is that most of the careers I am in
1. 3 answers
2. asked by felicia
3. 1,117 views
Wilhelm Wundt is known for his research relating to introspection. During the use of this technique, participants receive:
1. 1 answer
2. asked by hah
3. 1,103 views
if line MS is a median of triangle MNQ. Line QS equals 3a-14, line SN equals 2a + 1, and the measurment of angle MSQ equals
1. 1 answer
2. asked by steve
3. 1,064 views
Two blocks of masses m and 2m are held in equilibrium on a frictionless incline as in the figure. In terms of m and θ, find the
1. 1 answer
2. asked by kay
3. 983 views
How many atoms of hydrogen are in a mixture of 3.49x10^23 molecules of H2O and 78.1g of CH3OH?
1. 2 answers
2. asked by Madison
3. 968 views
if your smoke detector contains 0.10 mg of 241Am, how long will it take to decay 1.25 * 10^-2mg
1. 1 answer
2. asked by Mel
3. 932 views
5x+10y +15z-15x+10y-5z+5x-10y-5z / (5x+10y+15z)-(15x+10y-5z)+(5x-10y-5z)a. 1/3 b. 1 c. x+2y+z / x-2y+3z d. x-2y-z / x+2y-3z e.
1. 5 answers
2. asked by Tomas
3. 910 views
Post a behavioral research situation that could use a Pearson coefficient research study and a chi square research study.
1. 2 answers
2. asked by high school
3. 903 views
animals posses sensory powers that humans lack. Homing pigeons fly with great speed and accuracy when with messages to faraway
1. 1 answer
2. asked by Anonymous
3. 902 views
daydreaming can be an expression of:A) repression B) denial C) sublimation D) projection My answer is D
1. 1 answer
2. asked by Dee
3. 901 views
Which of the following statements about John D. Rockefeller is most accurate?A. He founded the Standard Oil Company when he was
1. 3 answers
2. asked by carolyn
3. 895 views
A rod 14.0 cm long is uniformly charged and has a total charge of -20.0 µC. Determine the magnitude and direction of the
1. 0 answers
2. asked by physics
3. 889 views
Which of the following describes the economies of Ghana and the Democratic Republic of the Congo (DRC)?a. Ghana has a stable,
1. 4 answers
2. asked by Anonymous
3. 886 views
Problem 3- If a bug can jump straight up to a height of 0.5 m.a) what is its initial speed as it leaves the ground? b) How long
1. 3 answers
2. asked by Maryam
3. 837 views
Problem 2- A car is stopped at a traffic light. It then travels along a straight road so that its position from the light is
1. 2 answers
2. asked by Maryam
3. 826 views
a body is under of 2 forces 7n and 10n find the resultant of 2 forces if (a)the forces are parallel and act in thesame direction
1. 1 answer
2. asked by johnson
3. 817 views
A mixture of C3H8 and C2H2 has a mass of 2.6g . It is burned in excess O2 to form a mixture of water and carbon dioxide that
1. 0 answers
2. asked by bobert
3. 809 views
How many mL of 0.416 M of HCl are needed to dissolve 8.68 g of BaCO3?2HCl(aq)+BaCO3(s)=BaCl2(aq)+H2O(l)+CO2(g)
1. 1 answer
2. asked by christa
3. 796 views
How does altitude affect the freezing, melting and boiling points of water?
1. 3 answers
2. asked by A
3. 789 views
A standard deck of cards contains 52 cards. Of these cards there are 13 of each type of suit (hearts, spades, clubs, diamonds)
1. 1 answer
2. asked by Alex
3. 778 views
A standard deck of cards contains 52 cards. Of these cards there are 13 of each type of suit (hearts, spades, clubs, diamonds)
1. 1 answer
2. asked by Alex
3. 753 views
people in countries with tend to be happierA) high incomes B) low incomes C) more civil liberties D) high incomes and more civil
1. 5 answers
2. asked by Dee
3. 745 views
what was the most significant reform that Peter the Great implemented in Russia?
1. 7 answers
2. asked by Anonymous
3. 743 views
Hello.I am a tutor. I tutor second grade students. I need a good website that will give me great tips on how I can better teach
1. 2 answers
2. asked by Qiayamah
3. 728 views
light from the sun takes approximately 8 minutes to reach earth. If the light travels at a speed of 3 x 10 raised to 8 meters /
1. 1 answer
2. asked by chetan
3. 725 views
Assume 10% of the engines manufactured on an assembly line are defective. If engines are randomly selected one at a time and
1. 1 answer
2. asked by Katy
3. 714 views
Help a brother out!!! please!!!Nitroglycerin, C3H5N3O9 decomposes to form N2,CO2,H2O, and O24(C3H5N3O9)-> 6N2+12O2+10H20+O2
1. 2 answers
2. asked by bob
3. 711 views
A roller-coaster car with a mass of 550 kg starts at rest from a point 46 m above the ground. At point B, it is 23 m above the
1. 0 answers
2. asked by Tammy
3. 705 views
A sailboat heads north at 3 m/s for 1 hour and then tacks back to the southwest (at 45 degree to north) at 2 m/s for 45 minutes.
1. 1 answer
2. asked by Walter
3. 702 views
Table salt, NaCl(s), and sugar, C12H22O11(s), are accidentally mixed. A 5.50-g sample is burned, and 3.10 g of CO2(g) is
1. 1 answer
2. asked by tata72
3. 688 views
Kelly plans to put her graduation money into an account and leave it there for 4 years while she goes to college. She receives
1. 1 answer
2. asked by joe
3. 687 views
A pilot of a single engine airplane flies at a constant speed of 200 km/h at a bearing of 25 degree north east there is 40 km/h
1. 2 answers
2. asked by Vian
3. 684 views
CuSO4+LiNo3Potassium sulfate+lithium nitrate Can someone help me figure out the equations for these two? Phases aren't required
1. 1 answer
2. asked by kelly
3. 675 views
I need to replace the verbs with on.i need help please. ex: Les gens admirent es belles couleurs du Paradisier. ex: On admire
1. 9 answers
2. asked by Person
3. 673 views
Wendell invests $10,000 in a stock portfolio made up of Petroleum Special at $30 per share, New shoes at $12 per share, and
1. 1 answer
2. asked by Walter
3. 665 views
From the edge of the rooftop of a building, a boy throws a stone at an angle 26.1° above the horizontal. The stone hits the
1. 1 answer
2. asked by mia
3. 653 views
There are 45 candies in a bowl, 20 red and 25 yellow. If two are taken from the bowl, what is the probability they will be two
1. 1 answer
2. asked by Alex
3. 645 views
He needs two adjacent rectangular enclosures - he has 300 feet of fencing.a. find a function that models the total area of
1. 1 answer
2. asked by emily
3. 644 views
Draw all the possible rectangles with a perimeter of 26 cm and whole number lengths of sides. For each rectangle, label the
1. 1 answer
2. asked by Molly
3. 633 views
Ms. Santiago has many pens in her desk drawer. She says that if you divide the total number of pens by 1, 2, 3, 4, 5, or 6, you
1. 4 answers
2. asked by Shohanur
3. 629 views
an airplane rolls down the runaway. compared to which reference point is the airplane in motion?
1. 1 answer
2. asked by Anonymous
3. 620 views
A student throws a baseball at a large gong 45 m away and hears the sound of the gong 1.35258 s later. The speed of sound in air
1. 2 answers
2. asked by Tristan
3. 616 views
cellular phone companies. 1. with this plan each person is charged $19.95 per month and $0.31 per minute 2. with this plan each
1. 2 answers
2. asked by louise
3. 614 views
Some bacteria get their energy from reduction of CO2 to CH4 by H2.1. How many electrons are required to reduce CO2 to CH4? 2.
1. 0 answers
2. asked by Kam
3. 614 views
Trucks often have signs on the back that say, “If you can’t see my mirrors, I can’t see you.” Explain the physics.
1. 0 answers
2. asked by Miss Angie
3. 613 views
A 50mL solution of NaOH is neutralized by adding 37.5 mL of 0.045 M HCL. What was the original concentration of the NaOH
1. 3 answers
2. asked by Julie
3. 613 views
trying to solve a point a slope word problem.you are scheduled to start your job at an oil change shop 2 hours after shop opens.
1. 1 answer
2. asked by aaron
3. 599 views
So im told to find the value of each variable. It's a X. One side equals 3xº and the other side says (80-x)º3x=80-x 4x=80 x=20
1. 2 answers
2. asked by J
3. 581 views
A total charge of 96.5 kC is passed through an electrolytic cell. What mass of copper will be produced from a copper(II)
1. 0 answers
2. asked by Gabriella
3. 580 views
Please help me figure out what I am searching for in this question.•Discuss your first theory(Rational Theory) and how
1. 3 answers
2. asked by Tom
3. 580 views
When a 0.101 kg mass is suspended at rest from a certain spring, the spring stretches 3.80 cm. Find the instantaneous
1. 2 answers
2. asked by Joe
3. 574 views
How would you use a number line to round 148 to the nearest ten.Explain.
1. 1 answer
2. asked by Jerry
3. 569 views
y = ½ x^2 – x +3 for 0≤x≤6(b) Calculate the mid- ordinates for 5 strips between x = 1 and x= 6, and hence use the
1. 1 answer
2. asked by kg
3. 569 views
How many grams of NH3 are required to make 52.7g H2O in the following reaction : 4NH3+6NO->5N2+6H2O
1. 1 answer
2. asked by bob
3. 565 views
What volume of 0.140 M HCl is needed to neutralize 2.53g of Mg(OH)_2
1. 1 answer
2. asked by Em
3. 564 views
For this question, you need to apply what you learned about temperature controls to two locations on Earth. Discuss how the 5
1. 1 answer
2. asked by Lexi
3. 562 views
consider a stationary nucleus of mass M. show that the minimum energy the photon must have to create an electron-positron pair
1. 0 answers
2. asked by prerana
3. 537 views
how do you construct a age pyramid. i have the age class and observed individuals how do i get the present in each age class
1. 1 answer
2. asked by donna
3. 537 views
Math Problem page 18Wendell invests $10,000 in a stock portfolio made up of Petroleum Special at $30 per share, Newshoe at $12
1. 0 answers
2. asked by Walter
3. 537 views
Two spheres are cut from the same uniform rock. One has a radius r1 = 4.50 x 10-2 m and mass M1. The mass of the second sphere
1. 1 answer
2. asked by Joe
3. 535 views
amount of matter in an object
1. 1 answer
2. asked by neil
3. 535 views
What mass of KCl \rm KCl is needed to precipitate the silver ions from 13.0mL mL of 0.200 M M AgNO 3 \rm AgNO_3 solution
1. 2 answers
2. asked by Anonymous
3. 534 views
all personality variables are:A) highly heritable B) unconscious C) theoretical constructs D) easily assessed with
1. 6 answers
2. asked by Dee
3. 528 views

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