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2012
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Questions Asked on October 23, 2012

a small rock with mass 0.20 kg is released from rest at point A which is at the top edge of a large, hemispherical bowl with
1. 3 answers
2. asked by Frankie
3. 19,300 views
Complete and balance the molecular equation, including phases, for the reaction of aqueous ammonium bromide, NH4Br, and aqueous
1. 2 answers
2. asked by Kelly
3. 13,627 views
2. Mrs. Whimsey’s class is having a pizza party. If there are 16 students and 4 pizzas cut into 8 slices, what answer choice
1. 17 answers
2. asked by Esther
3. 7,439 views
From a boat on the lake, the angle of elevation to the top of a cliff is 26°35'. If the base of the cliff is 85 feet from the
1. 2 answers
2. asked by Ashley
3. 6,399 views
Ted Andrews bought 15 shares of Clark Company stock at $14.875. He sold them a month later at $20.375. What was his profit?
1. 24 answers
2. asked by Esther
3. 5,773 views
A single conservative force = (6.0x - 12) N where x is in meters, acts on a particle moving along an x axis. The potential
1. 1 answer
2. asked by member of physics
3. 5,452 views
Julie is digging a square area in her backyard for a vegetable garden. If the area is 52 square feet, what is the approximate
1. 9 answers
2. asked by Math
3. 4,627 views
Calculate the change in entropy that occurs when 17.68 g of ice at -12.7°C is placed in 54.05 g of water at 100.0°C in a
1. 1 answer
2. asked by Sarah
3. 4,341 views
A woman 5 ft tall walks at the rate of 5.5 ft/sec away from a streetlight that is 16 ft above the ground. At what rate is the
1. 3 answers
2. asked by Anonymous
3. 4,288 views
ignition of mgnh4po4*6h2o produces nh3, h2o and magnesium pyrophosphate, Mg2P2O7. complete and balance the equation for this
1. 1 answer
2. asked by Andrea
3. 4,284 views
If p(x) is a cubic polynomial such that p(0) = 0, P(2) = -4 and P(x) is positive only when x > 4 find p(x).
1. 1 answer
2. asked by Sam
3. 4,033 views
Determine the normal force for a laundry basket with a mass of 4.7 kg in each of the following situations(a) at rest on a
1. 1 answer
2. asked by Dakota
3. 3,896 views
2. Contrast the metric units of distance, time, and speed. Describe the relationship between them.
1. 2 answers
2. asked by Bella
3. 3,801 views
Air pressure at sea level is 30 inches of mercury. At an altitude of h feet above the, air pressure, P, in inches of mercury, is
1. 4 answers
2. asked by Andy
3. 3,794 views
A crate pushed along the floor with velocity \vec{v} _{i} slides a distance d after the pushing force is removed.If the mass of
1. 2 answers
2. asked by nhan
3. 3,343 views
On a standardized test, Phyllis scored 84, exactly one standard deviation about the mean. If the standard deviation for the test
1. 2 answers
2. asked by Tanyetta
3. 3,277 views
When a number is decreased by 30%of itself, the result is 28. What is the number?
1. 1 answer
2. asked by Angel
3. 3,125 views
A 7900- helicopter accelerates upward at 0.90 while lifting a 1100- frame at a construction site.A) What is the lift force
1. 1 answer
2. asked by Freddy
3. 3,082 views
How many calories of heat are required to change 1 gram of ice at 0°C to liquid water at 0°C?
1. 1 answer
2. asked by Jodie
3. 2,988 views
A human hair is approximately 55 µm in diameter.Express this diameter in meters. Answer in units of m
1. 1 answer
2. asked by Karen
3. 2,773 views
Which of the following statements are TRUE? Select all that apply.An isolated system is one in which objects inside the system
1. 2 answers
2. asked by member of physics
3. 2,769 views
Why do you think Sir Gawain flinched when the Green Knight brought his ax down, but the Green Knight did not flinch when he was
1. 1 answer
2. asked by Beth
3. 2,719 views
When 80% of a number is added to the number, the result is 252. How do I find the number?
1. 1 answer
2. asked by Gene
3. 2,689 views
Two fewer than a number doubled is the same as the number decreased by 38. Find the number.If n is "the number," which equation
1. 7 answers
2. asked by Monica
3. 2,668 views
What mass of sodium bicarbonate reacts with 225 mL of 6.00 M HCl?
1. 1 answer
2. asked by Petreg
3. 2,573 views
In "The Canterbury Tales" Chaucer uses the pilgrimage primarily as a device to ___________.A.emphasize the characters' religious
1. 3 answers
2. asked by Beth
3. 2,542 views
ron is tiling a countertop. he needs to place 54 square tiles in each of 8 rows to cover the counter. he,wants to randomly place
1. 3 answers
2. asked by stephie
3. 2,540 views
how many milliliters of 0.250 M KMnO4 are needed to react with 3.55 grams of iron(II)sulfate, FeSO4? the reaction is as follows:
1. 1 answer
2. asked by robert
3. 2,427 views
Two cars start from the same point at the same time. One travels north at 25 mph, and the other travels east at 60 mph. How fast
1. 5 answers
2. asked by Allison
3. 2,398 views
the color change at the endpoint should persist for 30 seconds. explain why the time lapse is a good titration technique.
1. 1 answer
2. asked by ashley
3. 2,318 views
suppose an elephant and a feather fall from a skyscraper. in the presence of air resistance, the elephant would fall faster
1. 3 answers
2. asked by kyle
3. 2,292 views
Find the present value of the ordinary annuity. Please round the answer to the nearest cent.$2,000 per semiannual period for 7
1. 2 answers
2. asked by Anonymous
3. 2,226 views
A 3.75-G SAMPLE OF IRON ORE IS TRANSFORMED TO A SOLUTION OF IRON(II)SULFATE, FeSO4,AND THIS SOLUTION IS TITRATED WITH 0.150 M
1. 2 answers
2. asked by malissa
3. 2,203 views
In determining the heat capacity of a calorimeter, 50ml of water at 56*C is added to 50ml of water at 23*C. After about five
1. 1 answer
2. asked by Josh
3. 2,124 views
Compute the number of vinyl tiles, measuring 10 in. each side, needed to tile a kitchen measuring 20ft. by 16ft. _____tiles
1. 2 answers
2. asked by Ashley
3. 2,093 views
The drawing shows a collision between two pucks on an air-hockey table. Puck A has a mass of 0.025 kg and is moving along the x
1. 3 answers
2. asked by Sam
3. 2,053 views
10. From the 2010 census data, the population of Texas was about 2.5 x 107 people. Florida’s population was about 1.9 x 107.
1. 2 answers
2. asked by Esther
3. 1,976 views
A ball is attached to one end of a wire, the other end being fastened to the ceiling. The wire is held horizontal, and the ball
1. 1 answer
2. asked by John
3. 1,942 views
A girl is skipping stones across a lake. One of the stones accidentally ricochets off a toy boat that is initially at rest in
1. 2 answers
2. asked by Elizabeth
3. 1,903 views
Chelsie saves 1/5 of her allowance and spends 2/3 of her allowance at the mall. What fraction of her allowance remains?
1. 4 answers
2. asked by nathan
3. 1,857 views
John runs at 4.6 m/s for 7.53 s along the xaxis. How far does John run? Answer in units of m AND What relationship should be
1. 1 answer
2. asked by Sadie
3. 1,855 views
The asteroid belt circles the sun between the orbits of Mars and Jupiter. One asteroid has a period of 10 Earth years.a) What is
1. 1 answer
2. asked by Caitlin
3. 1,842 views
One third of the students in mrs. hayko's class walk to school. Of the students who do not walk, four-fifths take the bus.a)
1. 2 answers
2. asked by Cherie
3. 1,743 views
If 0.500 mol NaN3 react, what mass in grams of nitrogen would result?
1. 1 answer
2. asked by Ariana
3. 1,714 views
If a rod is moving at a velocity equal to 1/2 the speed of light parallel to its length, what will a stationary observer observe
1. 1 answer
2. asked by Laurie
3. 1,703 views
For the following reaction, 3.93 grams of carbon tetrachloride are mixed with excess methane (CH4). The reaction yields 4.10
1. 1 answer
2. asked by Kaitlin
3. 1,671 views
The following four lenses are placed together in close contact. Find the focal length of the combination.Lens 1- F'= +200mm Lens
1. 5 answers
2. asked by Help please
3. 1,618 views
A FALSK CONTAINS 49.8 mL OF 0.150 CALCIUM HYDROXIDE. HOW MANY MILLILITERS OF 0.500 SODIUM CARBONATE ARE REQUIRED TO REACT
1. 1 answer
2. asked by HAMZA
3. 1,567 views
A hydrogen atom has a diameter of about10.1 nm. Express this diameter in meters, millimeters, and micrometers.
1. 2 answers
2. asked by Katie
3. 1,561 views
The wavelength of the electromagnetic waves is 200 nm. Which of following regions does it belong to?visible light region ultra
1. 1 answer
2. asked by Anonymous
3. 1,540 views
Astronomers can calculate the mass of a planet by using the orbital parameters of one of its moons. Consider a hypothetical
1. 1 answer
2. asked by Emily
3. 1,532 views
A box slides down a plane 8 m long that is inclined at an angle of 30 degrees with the horizontal. If the box starts from rest
1. 2 answers
2. asked by Alex
3. 1,500 views
What gases escaped during the sodium bicarbonate washing for the preparation of Synthetic Banana Oil lab. The isopentyl acetate,
1. 1 answer
2. asked by Vai
3. 1,498 views
Show that the equation x^3+ x^2-3=0 has no rational roots, but that it does have an irrational root between x=1 and x=2
1. 1 answer
2. asked by Sam
3. 1,484 views
find the points on the curve x^2+xy+y^2=7 (a) where the tangent is parallel to the x-axis and (b) where the tangent is parallel
1. 1 answer
2. asked by toma
3. 1,477 views
A proton and an electron enter perpendicular to the direction of the magnetic field. The speed of the proton is twice the speed
1. 1 answer
2. asked by Physics Failure
3. 1,458 views
A dentist causes the bit of a high-speed drill to accelerate from an angular speed of 1.20x10^4 rad/s to an angular speed of
1. 1 answer
2. asked by Sam
3. 1,448 views
At what temp do hydrogen molecules, H2, have the same rms speed as nitrogen molecules, N2, at 455 C? At what temperature do
1. 0 answers
2. asked by Ted
3. 1,446 views
cotx-cos^(3)xcscx
1. 1 answer
2. asked by Sophia
3. 1,442 views
jonah and his,friends go apple picking. jonah fills 5 baskets. each basket holds 15 apples. if 4 of jonahs friends pick the,same
1. 4 answers
2. asked by stephie
3. 1,434 views
knowing that one mole of KHP, C8H5O4K, reacts with one mole of NaOH, what mass of KHP is required to neutralized 30.0mL of the
1. 1 answer
2. asked by tierra
3. 1,414 views
The maximum current in an AC circuit is 3.0 Amperes. What is the rms value of the current in the AC circuit?0.5 A 2.1 A 3.0 A
1. 1 answer
2. asked by I'm on anon
3. 1,391 views
A circular loop with 30 turns and area of 0.25 m2 rotates at 100 rad/s. The axis of rotation of the loop is perpendicular to the
1. 1 answer
2. asked by Liam
3. 1,390 views
QUESTIONS (vvv)(1) Solve the system by subsitution 2x + y = -11 3 - 4y = 11 (2) Solve the system by elimination 2x + 6 = -12 5x
1. 1 answer
2. asked by Robert
3. 1,361 views
Which of the following best describes the difference between a mixture and a pure substance?A. A mixture is made up of more than
1. 1 answer
2. asked by Anonymous
3. 1,357 views
To convert a temperature in degrees Celsius to degrees Fahrenheit multiply the Celsius temperature by 9/5 and then add 32 F Is a
1. 2 answers
2. asked by Ashely
3. 1,356 views
Choose an ecosystem to research with regard to abiotic factors and how organisms in that particular ecosystem depend on those
1. 1 answer
2. asked by S
3. 1,344 views
2. When a 625g mass is attached to a vertical spring, the spring stretches by 16cm. How much mass must be attached to the spring
1. 1 answer
2. asked by Quita
3. 1,330 views
A fire hose has a circular cross-section which has a diameter of 20 cm. The hose is full of water and the water in the hose is
1. 1 answer
2. asked by Maria
3. 1,317 views
How do you envision applying your sketching skills in other classes?
1. 2 answers
2. asked by meee
3. 1,315 views
If you know the frequency of any form of electromagnetic radiation, you can determine its wavelength as for all electromagnetic
1. 1 answer
2. asked by Fail
3. 1,308 views
Samuel solved the equation h – 234 = 1,192 and found the solution to be h = 958. Is he correct? He is right I think because
1. 6 answers
2. asked by Jake
3. 1,293 views
1. This is the study of beauty and art. (1 point)ethicsharmony unity aesthetics 2. This view refers to how realistic the subject
1. 12 answers
2. asked by all about me
3. 1,291 views
Directions: Wrie each sentence. Change the underlined phrase to show possession. The honesty of children is refreshing. The
1. 2 answers
2. asked by robin
3. 1,275 views
Find the energy stored in the solid flywheel of mass 8.0×104 and radius 1.8 when it's rotating at 290
1. 1 answer
2. asked by John
3. 1,264 views
What happens to the atomic number of the daughter nucleus if it is formed after the emission of the beta particle?The atomic
1. 0 answers
2. asked by eothwoie
3. 1,261 views
For a normal population with µ = 100 and σ = 20:1. What is the probability of a particular score being greater than 110? 2.
1. 1 answer
2. asked by Komal
3. 1,245 views
Which of the following statements are FALSE? Select all that apply.In an isolated system where only conservative forces cause
1. 1 answer
2. asked by member of physics
3. 1,240 views
You are the manager of a monopoly, and your demand and cost functions are given by P = 300 – 2.5Q and C(Q)=1000 + 2.5Q2.a.At
1. 1 answer
2. asked by Turner
3. 1,226 views
A 83-kg man stands on a spring scale in an elevator. Starting from rest, the elevator ascends, attaining its maximum speed of
1. 1 answer
2. asked by ari
3. 1,211 views
Of 480 consumers polled, some purchase ice cream, some purchase frozen yogurt, and some purchase both. If 260 people polled
1. 2 answers
2. asked by Anna64
3. 1,211 views
Block 1, of mass1 = 0.550kg , is connected over an ideal (massless and frictionless) pulley to block 2, of mass2 , as shown. For
1. 2 answers
2. asked by Samantha
3. 1,211 views
You are the manager of a firm which produces according to the cost function C(Q) = 75+5Q2. Determine the profit maximizing
1. 0 answers
2. asked by Turner
3. 1,209 views
A source of light and a screen lie in the same plane, 3 metres in front of a plane mirror, the mirror surface being parallel
1. 1 answer
2. asked by Need help please!
3. 1,206 views
What is the old woman’s perspective on poverty as shown in these lines?Poverty is, though wanting an estate, / A kind of
1. 0 answers
2. asked by Beth
3. 1,195 views
Calculate the future value of an ordinary annuity consisting of annual payments of $1,000 for 4 years if the payments earn
1. 1 answer
2. asked by kerry
3. 1,191 views
A lead bullet with a mass of 8.50 g traveling at 4.80 x 102 m/s strikes a 2.00 kg block of wood and is embedded in it. Both the
1. 1 answer
2. asked by Lola
3. 1,176 views
pedro gets 8 hours of sleep each night. how many hours does pedro sleep in a yeat with 365 days? please solve the problem?
1. 4 answers
2. asked by stephie
3. 1,171 views
What does the curved line represent in the graph?
1. 0 answers
2. asked by terra
3. 1,169 views
If there is 1/6 of a cake and Mitchell only wants 3/12 of it, how much of the cake does he want? Please help!!a)1/6 b)4/18
1. 2 answers
2. asked by Esther
3. 1,167 views
3. A 2000 kg sports car moves in a horizontal circular path of 150 m\radius at a constant speed of 80 m\s.a. magnitude of
1. 0 answers
2. asked by Shannon
3. 1,160 views
A descent vehicle landing on the moon has a vertical velocity toward the surface of the moon of 38.8 m/s. At the same time, it
1. 3 answers
2. asked by Erin
3. 1,157 views
For the first part of this question I got 12.12m/sB. With the help of a friend the boy measures the height to which the ball
1. 1 answer
2. asked by Josh
3. 1,146 views
1. A rescue plane flying horizontally at an altitude of 500 m and velocity of 300 m\s east drops a food supply packet to plane
1. 1 answer
2. asked by Shannon
3. 1,145 views
I am learning about scarcity in my SS 6th grade and I am unsure about this question.Which sentence best tells the effect of
1. 3 answers
2. asked by Larry
3. 1,140 views
Can someone please explain this problem step by step.How would you prepare 1000.0ml of 0.600M NaOH solution starting from
1. 1 answer
2. asked by Tasha
3. 1,115 views
In an experiment conducted using the Young's double-slit apparatus, the separation between the slits is 20 µm. A first-order
1. 2 answers
2. asked by Flux
3. 1,114 views
Assuming that the gases are ideal, calculate the amount of work done (in joules) in the following reaction. Is work done on or
1. 0 answers
2. asked by Heather
3. 1,103 views
how much heat is absorbed by contacting 10 grams of 100 degree C steam by a students hand.
1. 0 answers
2. asked by Anon
3. 1,103 views
By accident, a large plate is dropped and breaks into three pieces. The pieces fly apart parallel to the floor, with v1 = 2.75
1. 0 answers
2. asked by Elizabeth
3. 1,096 views

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