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Questions Asked on February 26, 2014

1. Which of the following is an example of matter? (1 point) leaves shadows light from the sun sound 2. Which of the
1. 45 answers
2. asked by Jenna
3. 18,674 views
how much energy is released to the environment by 50.0 grams of condensing water vapor?
1. 3 answers
2. asked by khasan
3. 7,875 views
Is the relation a function{(14,15),(5,7),(3,10),(11,1),(5,8) yes or no
1. 19 answers
2. asked by snow
3. 5,738 views
Sort the following chromium compounds by whether the cation is chromium(II) or chromium(III). Cr2S3, Cr3P2, Crl3, CrO, CrBr2,
1. 1 answer
2. asked by mysterychicken
3. 5,613 views
Isaiah walks 3 miles due north, turns and then 5 miles due east. How far is he from his starting point?
1. 7 answers
2. asked by quenton
3. 5,025 views
which of the following tetrahedral molecules is polar? please explainCH4 CF4 CH3F thanks
1. 1 answer
2. asked by Johnny
3. 4,478 views
skier of mass 79 kg is pulled up a slope by a motor-driven cable.(a) How much work is required to pull him 80 m up a 30° slope
1. 1 answer
2. asked by Muriel
3. 3,532 views
In 1898 L. J. Bortkiewicz published a book entitled The Law of Small Numbers. He used data collected over 20 years to show that
1. 2 answers
2. asked by Ashley
3. 3,361 views
Convert theta = pi/4 to rectangular equation
1. 2 answers
2. asked by Megan...very confused
3. 3,344 views
In which of the following pairs of compounds are both members of the pair molecular compounds?PCl3 and LiBr CCl4 and KOH NaH and
1. 1 answer
2. asked by layla
3. 3,293 views
1. which of earth’s spheres contain most of its mass?A. atmosphere b. hydrosphere c. geosphere d. biosphere
1. 6 answers
2. asked by PIIZAA SJDHFSKDFJS
3. 3,209 views
A)A block rests on a horizontal frictionless surface. A string is attached to the block, and is pulled with a force of 60.0 N at
1. 1 answer
2. asked by Tsion
3. 2,943 views
Calculate the total heat energy needed to convert 110g of ice at -10°C to steam at 110°C..?
1. 1 answer
2. asked by Tiffany
3. 2,861 views
Which graph best represent following expression|x-1|>2
1. 1 answer
2. asked by molly
3. 2,739 views
If 34.1 grams of pentane (C5H12) are burned in excess oxygen, how many grams of H2O will be produced?
1. 2 answers
2. asked by Anonymous
3. 2,596 views
a period 2 nonmetal, X, forms the molecular compound NX3. Which of the following are also correct formulas for molecular
1. 1 answer
2. asked by layla
3. 2,421 views
A 70-kg circus performer is fired from a cannon that is elevated at an angle of 43° above the horizontal. The cannon uses
1. 1 answer
2. asked by Anonymous
3. 2,382 views
Long distance Phone Company A charges a base rate of $5.00 per month plus 4 cents a minute that you're on the phone. Long
1. 2 answers
2. asked by Adina
3. 2,367 views
Calculate the heat required to raise the temperature of 10kg of copper from 20°C to 30°C (S.H.C. of copper = 400J/kg k).
1. 3 answers
2. asked by Ebenezer
3. 2,324 views
A horse pulls a cart with a force of 180.0 N at and angle of 33.0° with respect to the horizontal and moves along at a speed of
1. 2 answers
2. asked by Sam
3. 2,254 views
Instant cold packs, often used to ice athletic injuries on the field, contain ammonium nitrate and water separated by a thin
1. 1 answer
2. asked by Smith
3. 2,033 views
In 1846, the population of San Francisco, California, was only 200. By 1852, the city's population was 36,000.Which contributed
1. 4 answers
2. asked by Jenna
3. 2,022 views
If ABC ~ DEF and the scale factor from ABC to DEF is 1/6, what are the lengths of DE,EF , and DF, respectively?
1. 2 answers
2. asked by QUILO
3. 2,017 views
which figures will always be similar to each other?A.two rectangles B.two trapezoids C.two equilateral triangles D.two hexagrams
1. 7 answers
2. asked by bonn
3. 1,982 views
2.Which answer best describes the main benefit of the steam engine?A)It was used to create road-building materials. B)It was
1. 10 answers
2. asked by #1Student
3. 1,968 views
The ionization constant Ka of an indicator HIn is 1.0x10^-6. The color of the nonionized form is red and that of the ionized
1. 1 answer
2. asked by Taylor
3. 1,961 views
if f(x)= x+(1/x), find f'(x) using the limit definition of derivative.Please show steps!!! Thank you!!!
1. 1 answer
2. asked by Tenshi
3. 1,931 views
The angle of elevation from a point on the ground to the top of a tree is 39.8 degrees. The angle of elevation from a point 51.7
1. 1 answer
2. asked by Anonymous
3. 1,889 views
Please Help!For the following, which type of t-test is required? (a) Studying the effects of a memory drug on Alzheimer’s
1. 1 answer
2. asked by jamie
3. 1,848 views
My problem is:When Christy takes her pet dog for a walk, the dog walks at a very consistent pace of 0.45 m/s. There are 20.1 m
1. 3 answers
2. asked by Brady
3. 1,783 views
The builders of the pyramids used a long ramp to lift 21000-kg (21-ton) blocks. If a block rose 1.0 m in height while traveling
1. 1 answer
2. asked by marie
3. 1,715 views
Karl can afford car payments of $235 a month for 48 months. The bank will lend him money to buy a car at 7.75 percent interest.
1. 1 answer
2. asked by Alec
3. 1,594 views
Crossfade Co. issued 15-year bonds two years ago at a coupon rate of 6.9 percent. The bonds make semiannual payments.Required:
1. 3 answers
2. asked by Alec
3. 1,489 views
When 10.00g of phosphorus is burned in O2(g) to form P4O10(s), enough heat is generated to raise the temperature of 2990g of
1. 0 answers
2. asked by John
3. 1,431 views
The number of failures of a testing instrument from contamination particles on the product is a Poisson random variable with a
1. 1 answer
2. asked by Ashley
3. 1,430 views
Using who/whom whoever/whomeverAt red lights, my friend tries to race whoever pulls up beside him. Susan, who was in an ugly
1. 4 answers
2. asked by Anonymous
3. 1,368 views
Calculate the temperature found when 10kg of water at 100°C is mixed with 20kg of water at 40°C.
1. 3 answers
2. asked by Ebenezer
3. 1,360 views
What was "Manifest Destiny"?a. the idea that Americans of European descent were superior to Native Americans b. the idea that
1. 5 answers
2. asked by Wendy
3. 1,324 views
One tablespoon of peanut butter has a mass of 17g . It is combusted in a calorimeter whose heat capacity is 130kJ/∘C . The
1. 1 answer
2. asked by Sarah
3. 1,298 views
When a 2.00-kg object is hung vertically on a certain light spring described by Hooke's law, the spring stretches 3.17 cm.(a)
1. 0 answers
2. asked by Muriel
3. 1,219 views
Suppose that the profit, p, for selling bumper stickers is given by p(x) = 0.1x2 + 8x - 50.What is the minimum number of bumper
1. 2 answers
2. asked by Rachel
3. 1,207 views
suppose x is a uniform random variable with c=40 and d=70. find the standard deviation of x
1. 1 answer
2. asked by sydney
3. 1,177 views
Take into account the Earth's rotational speed (1 rev/day) and use 5 significant figures.(a) Determine the necessary speed, with
1. 0 answers
2. asked by Anonymous
3. 1,161 views
The drawing shows a parallel plate capacitor that is moving with a speed of 30 m/s through a 3.1 T magnetic field. The velocity
1. 1 answer
2. asked by Dee
3. 1,156 views
A rock is dropped off of a bridge into the water below. If the initial velocity was zero, and the well is on Earth (g = 9.8
1. 1 answer
2. asked by Anonymous
3. 1,142 views
the number of nonbonding electrons exceeds the number of bonding electrons in the lewis structure of which of the following
1. 1 answer
2. asked by layla
3. 1,127 views
An airplane pilot fell 355 m after jumping without his parachute opening. He landed in a snowbank, creating a crater 1.4 m deep,
1. 0 answers
2. asked by Anonymous
3. 1,124 views
Calculate the temperature found when 10kg of water at 100°C is mixed with 20kg of water at 40°C.
1. 2 answers
2. asked by Ebenezer
3. 1,118 views
A 500 kg roller coaster starts from rest at point A (Fig. 6.29) and rolls freely (no friction) to point B where the brakes are
1. 0 answers
2. asked by Anonymous
3. 1,115 views
A 630. mL flask contains O2 at a pressure of 0.75 atm and a temperature of 20°C. What mass of O2 is present?I know you Use PV =
1. 3 answers
2. asked by Chelsey
3. 1,099 views
Will you please check my work?I'm supposed to "Use square roots to solve the following equations; round to the nearest
1. 2 answers
2. asked by Student
3. 1,061 views
A sample of gas at a temperature of 37.0°C has a pressure of 725 torr and occupies a volume of 3.44 L.a. Use Boyle’s law to
1. 1 answer
2. asked by Chelsey
3. 1,054 views
Circle the following quadrilateral that does Not have at least one pair of consecutive sides congruent. (A) rhombus
1. 1 answer
2. asked by Anna
3. 1,053 views
MR CHEN WANTS TO BUY 27 BLUE PENS AND 35 RED PENS. THE PENS ARE SOLD IN PACKAGES OF 8.HOW MANY PACKAGES OF BLUE PENS MUST HE BUY
1. 3 answers
2. asked by JAMIE THOMAS
3. 1,052 views
A farmer needs to build a rectangular corral for his animals. He has 200 yards of fencing available. He needs to make 4 pens.
1. 2 answers
2. asked by Madeline
3. 1,025 views
If it requires 5.5J of work to stretch a particular spring by 2.3cm from its equilibrium length, how much more work will be
1. 0 answers
2. asked by ALI
3. 1,018 views
The forests of the Pacific Northwest are just one of the many different ______________ in the United States where many people
1. 3 answers
2. asked by Chelsea
3. 995 views
What is the molarity of a solution composedof 2.23 g of potassium iodide (KI) dissolved in enough water to make 0.181 L of
1. 1 answer
2. asked by Roberta
3. 985 views
A wooden block of mass m = 2.3 kg starts from rest on an inclined plane sloped at an angle 26 degrees from the horizontal. The
1. 0 answers
2. asked by Sydney
3. 981 views
I've tried and tried to answer this question..I just hate math and math hates me. So let's get to the point why you are all here
1. 2 answers
2. asked by Jenna
3. 963 views
The weights of male babies less than 2 months old in the United States is normally distributed with a mean of 11.5 pounds and a
1. 2 answers
2. asked by Jeri Jackson
3. 962 views
A thundercloud has an electric charge of 43.2 C near the top of the cloud and -38.7 C near the bottom of the cloud. The
1. 0 answers
2. asked by Il
3. 954 views
The law of large numbers tells us what happens in the long run.Like many games of chance, the numbers racket has outcomes so
1. 0 answers
2. asked by PLEASE HELP!!!!!!!!!
3. 946 views
Mercury(II) Oxide decomposes upon heating, producing elementalmercury. This reaction has an enthalpy value of 90.8 kJ/mol. How
1. 1 answer
2. asked by johnny
3. 926 views
1. Consider a 1.00g unknown sample that contains 62.0% sodium carbonate and 38.0% sodium bicarbonate, NaHCO3, by mass. When this
1. 1 answer
2. asked by Mia
3. 925 views
You have tied a short length of rope to the handle of a bucket full of water, and are swinging the bucket in a vertical circle
1. 3 answers
2. asked by Anonymous
3. 904 views
You want to save $200 a month for the next 24 years and hope to earn an average rate of return of 11 percent. How much more will
1. 1 answer
2. asked by Alec
3. 904 views
Thesis: My favorite thing to do is listen to music.Transition-- Cool Closing Sentence: "Sing like no one is listening, dance
1. 4 answers
2. asked by Anonymous
3. 886 views
Two insulated wires, each 2.70 m long, are taped together to form a two-wire unit that is 2.70 m long. One wire carries a
1. 1 answer
2. asked by Dee
3. 884 views
An astronaut of mass 80 kg lands on a planet,the radius of which is half that of the earth and the mass of which is three times
1. 1 answer
2. asked by natty
3. 862 views
A can of soda at 80°F is placed in a refrigerator that maintains a constant temperature of 37°F. The temperature T of the soda
1. 2 answers
2. asked by rox
3. 855 views
What is the future worth of $1,000 in month 1, $1,040 in month 2, and amounts increasing by $40 per month through month 12, at
1. 0 answers
2. asked by SP
3. 847 views
1. Alexander Calder invented this type of art.fiber art mobiles ******** stabiles public art 2. Today, decisions in planning,
1. 5 answers
2. asked by Wendy
3. 838 views
In lab, I weighed out and found the molarity of 1.108g Na2C2O4 and 1.100g K3Fe(C2O4)3. I titrated an average of 0.0335L of the
1. 1 answer
2. asked by Tricia
3. 828 views
The weights of male babies less than 2 months old in the United States is normally distributed with a mean of 11.5 pounds and a
1. 1 answer
2. asked by Jeri Jackson
3. 826 views
what is the correct name for k2o
1. 2 answers
2. asked by Johnny
3. 815 views
A 20kg child slides down a long slide in a playground. She starts from rest at a height of 25m. When she is part way down the
1. 1 answer
2. asked by Robert
3. 815 views
This is my problem:When Christy takes her pet dog for a walk, the dog walks at a very consistent pace of 0.45 m/s. There are
1. 2 answers
2. asked by Brady
3. 815 views
Two masses are attracted by a gravitational force of 0.48 N. What will the force of attraction be if the distance between the
1. 1 answer
2. asked by Anonymous
3. 814 views
i don't understand the question a and b. so question a, it have to be add all?When he was young, Captain Conundrum mowed lawns
1. 0 answers
2. asked by victoria
3. 812 views
150.0 mL flask contains 740. g of N2 at 0°C.What is the pressure in atm. What is the pressure in torr? What is the pressure in
1. 3 answers
2. asked by Chelsey
3. 782 views
Your "weight" on Earth is a measure of the gravitational force between you and the Earth. What would your "weight" be on Mars?
1. 1 answer
2. asked by koko
3. 781 views
A 1.50 ✕ 103-kg car starts from rest and accelerates uniformly to 19.3 m/s in 11.7 s. Assume that air resistance remains
1. 0 answers
2. asked by Muriel
3. 779 views
In lab, I weighed out and found the molarity of 1.108g Na2C2O4 and 1.100g K3Fe(C2O4)3. I titrated an average of 0.0335L of the
1. 1 answer
2. asked by Tricia
3. 779 views
Vanadium has several oxidation states. write correct formulas for vanadium (iii) oxide and vanadium (v) oxide.
1. 0 answers
2. asked by jason
3. 772 views
There were some boys and girls in the school hall at first. 40% of the boys and 10% of the girls left the school hall. As a
1. 2 answers
2. asked by SRI
3. 771 views
write a recursive formula for 8,6,4,2,0 then find a14
1. 0 answers
2. asked by kiddy
3. 769 views
A rancher wants to enclose a rectangular area and then divide it into four pens with fencing parallel to one side of the
1. 1 answer
2. asked by EB
3. 769 views
What are the reasons for the rapid emergence of AIDS as a worldwide epidemic?
1. 1 answer
2. asked by Anonymous
3. 759 views
a 2250 kg car is traveling at 20 m/s to the west. the force required to stop the car at 7890 N to the east. How long will it
1. 1 answer
2. asked by Karen
3. 749 views
A 45.0g bullet is fired on a 2.0kg wooden block which is resting on a horizontal surface with a coefficient friction of 0.4 . If
1. 2 answers
2. asked by gie
3. 746 views
Im working on "Finding the Area and Circumference of a circle" I have a question. Is the circumference half of the area? I was
1. 3 answers
2. asked by SandpitTurtle
3. 744 views
Calculate [OH−] for 1.90mL of 0.190M NaOH diluted to 1.50L .
1. 1 answer
2. asked by JJ
3. 732 views
One gram of platinum has 3.09 × 1021 atoms, and each platinum atom has 78 electrons.How many electrons are contained in 4.00 g
1. 1 answer
2. asked by Rachel
3. 720 views
the diameters of ball bearings produced in a manufacturing process can be described using a uniform distribution over the
1. 1 answer
2. asked by sydney
3. 719 views
At a temperature of 57oC, a gas inside a 5.30 L metal canister has a pressure of 4000 torr. If the temperature is decreased to
1. 3 answers
2. asked by Chelsey
3. 715 views
Using who or Whom1. Who told you about our plans? 2. Who is our greatest scientist? 3. Whom did Armando send for? 4. Who are
1. 1 answer
2. asked by Anonymous
3. 700 views
f(x)=6x^3+19x^2+8x-5find all the zeros of the given function
1. 1 answer
2. asked by Andy
3. 697 views
I have a graph here. The vertex is(4,-4), then the points (3,-3) and (5,-3), then the points on the x axis are (2,0) and (6,0),
1. 4 answers
2. asked by Student
3. 694 views
Need help on this one. Trying to decide between a and b. Sarah wants to invest in capital goods in order to increase the
1. 1 answer
2. asked by Brandi
3. 691 views

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