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Laura

Questions (719)

In what ways is Bohr's model of the atom similar to and different from Thomson's model?
1. 4 answers
2. 2,142 views
What is the momentum (in kg m/s) of a 131- kg football player running at a top speed of 9.9 m/s?What is the momentum of a 9.32-
1. 1 answer
2. 1,009 views
Joe is making a rectangular mosaic with colored tiles. He will use 20 tiles to make his design. What are all the different
1. 1 answer
2. 522 views
A highway curve with a radius of 800 m is banked properly for a car traveling 100 km/h. If a 1620- kg Porshe 928S rounds the
1. 0 answers
2. 686 views
The air velocity of helicopter Hal is 200km/h due west. Hal's ground velocity is 180km/h in the direction N80*W. Determine the
1. 2 answers
2. 709 views
A room measures 14 feet by 20. feet. How many tiles would it take to cover the deck if the square tiles measure 8.0 inches to
1. 3 answers
2. 842 views
Player lost 15 yards, gained 3,then 21 in three successive running plays. What was his total gain and loss
1. 1 answer
2. 499 views
How are mobile computing, Web 2.0, and social media changing how IT systems are used?
1. 1 answer
2. 469 views
In September, the hospital has 23.652 admissions. Of these, 1,569 were readmissions. What is the hospital's readmission rate
1. 1 answer
2. 463 views
A moving picture theater usually took in $220 an evening on ticket sales. The manager found out that by reducing the price of
1. 3 answers
2. 524 views
I need help with the below math problem. I have to write out the steps to show the answer.2(x - 14) + 3 = 7x + 5
1. 3 answers
2. 437 views
Congress's adoption of the declaration of independence confirmed a decisive shift in the conflict between the colonies and
1. 2 answers
2. 758 views
In the mid-eighteen century, how did native americans influence relations between european nations? between britain and the
1. 2 answers
2. 686 views
In the SN2 mechanism, considering that the nucleophile attacks at the same time as the leaving group leaves, what would the
1. 0 answers
2. 490 views
How did tea change the life in Europe?
1. 24 answers
2. 1,474 views
If you separate the socks with equal charges 4 x10-9 C until they’re 7 cm apart, what force will each sock exert on the other?
1. 0 answers
2. 1,052 views
Match the following terms about analytical precipitations to their definitions:A.) Coprecipitation B.) Adsorption C.) Absorption
1. 3 answers
2. 2,123 views
If say 70 mL of water is heated vs 100 mL of water, would the temperature be different or does the amount of the substance not
1. 2 answers
2. 505 views
The pulley is light and frictionless. Find the mass M1, given that M2 (7.00 kg) is moving downwards and accelerates downwards at
1. 1 answer
2. 556 views
Can someone pleases explain what this sentence means...this sentence is talking about the middle class in France."They viewed
1. 1 answer
2. 444 views
A moving 3.20 kg block collides with a horizontal spring whose spring constant is 224 N/m.The block compresses the spring a
1. 2 answers
2. 3,614 views
A moving 3.20 kg block collides with a horizontal spring whose spring constant is 224 N/m.The block compresses the spring a
1. 3 answers
2. 721 views
A moving 3.20 kg block collides with a horizontal spring whose spring constant is 224 N/m.The block compresses the spring a
1. 0 answers
2. 699 views
What is 0.7g of SO2 ..and how would you do this equation? Thanks,
1. 1 answer
2. 311 views
How many moles in 0.7g of SO2 ..and how would you do this! Thanks
1. 1 answer
2. 382 views
Which remained strongly organized and grew more powerful as the Western Roman Empire collapsed?the military command the
1. 2 answers
2. 1,601 views
A 0.355-kg object undergoing SHM has ax = 2.30 m/s2 when x = 0.235 m. What is the time for one oscillation?
1. 1 answer
2. 2,208 views
A ball, of mass 0.3Kg, is held on the inside of a smooth hemispherical bowl at a height 0.09 m above the base. It is then
1. 1 answer
2. 509 views
Read the following poem and answer the question that follows."I Like to See it Lap the Miles" by Emily Dickinson I like to see
1. 4 answers
2. 4,333 views
Read the following short excerpt of student writing. Use your vocabulary and grammar knowledge to determine which suggestions
1. 1 answer
2. 1,570 views
Read the following short excerpt of student writing. Use your vocabulary and grammar knowledge to determine which suggestions
1. 2 answers
2. 2,345 views
Read the sentence below and answer the corresponding question.Despite their differences, my father and mother had an __________
1. 5 answers
2. 1,598 views
Which of these sentences contains an oxymoron?A. Mr. Keynes was a workaholic who found vacations to be about as relaxing as six
1. 5 answers
2. 2,624 views
from "EXTRICATING YOUNG GUSSIE"by P.G. Wodehouse She sprang it on me before breakfast. There in seven words you have a complete
1. 3 answers
2. 967 views
What impact did Emperor Constantine's establishment of the “New Rome” (Constantinople) have on the Roman Empire?A.The
1. 4 answers
2. 2,274 views
an insect flies 20ft in 1 s. how fast does the insect fly in miles per hour?
1. 4 answers
2. 1,908 views
If the symbol X represents a central atom, Y represents outer atoms, and Z represents lone pairs on the central atom, the
1. 1 answer
2. 1,744 views
If the symbol X represents a central atom, Y represents outer atoms, and Z represents lone pairs on the central atom, the
1. 1 answer
2. 2,369 views
cost in 2005 is 15.00cost on 2009 is 20.50 Consumer price index (20.50/15.00)x100=137 I understand that part but my professor
1. 1 answer
2. 469 views
Microwave ovens emit microwave energy with a wavelength of 13.0 cm. What is the energy of exactly one photon of this microwave
1. 2 answers
2. 3,040 views
Are truth-in-sentencing laws a good idea? What are their implications for crime control? for due process? for costs to the
1. 1 answer
2. 420 views
two questions..1a) How much discretion should prosecutors, judges, and parole board members have in administering the criminal
1. 3 answers
2. 1,485 views
Find the coordinates of the midpoint of a segment having the given endpoints. Then find the distance between the endpoints.1.
1. 1 answer
2. 648 views
Mrs. Jones owns 100 shares of stock in Daimler-Benz valued at 16.5 Euros per share. What is the value in $U.S. of her stock if:0
1. 0 answers
2. 455 views
1)The study of geography includesa)living in a dessert b)growing food c)predicting the weather d)studying people e) wearing
1. 4 answers
2. 546 views
An object is moving with constant velocity -->vWhich situation is impossible in such a circumstance? 1. One force acts on the
1. 2 answers
2. 2,789 views
Consider a coin which is tossed straight up into the air. After it is released it moves upward, reaches its highest point and
1. 1 answer
2. 872 views
Hi,I was hoping someone could double check a chemistry answer for me. I am trying to calculate the Ksp of Ag2CrO4. This question
1. 2 answers
2. 2,859 views
A GARDENER HAS 60' of edging. She wants to use it to enclose a 120 square foot rectangular area. She does not have to use up all
1. 1 answer
2. 866 views
supposed that a liter of sample water contains 1.00 mmol of Ca2+ ions and 1.50 mmol HCO3- ions. how many millimoles of CaCO3
1. 1 answer
2. 2,968 views
I am having trouble with this equation and calculating the enthalpy of formation.2 NaHCO3 (s) --> Na2CO3 (s) + H2O (g) + CO2 (g)
1. 0 answers
2. 788 views
The balanced equation for the decomposition of sodium bicarbonate is 2 NaHCO3 (s) --> Na2CO3 (s) + H2O (g) + CO2 (g)delta H
1. 1 answer
2. 761 views
What is the difference between Descriptive and casual studies?
1. 1 answer
2. 588 views
What is the difference between experimental and ex post facto research designs?
1. 1 answer
2. 883 views
Find the equation of the tangent line to the curve at the given value of t:x=sin(t); y=(cos(t))^2; t=(pi/3)
1. 1 answer
2. 528 views
A farmer is planting squash plants that need 2 3/8 feet to spread out. He has an area along a fence that is 20 feet long. Round
1. 1 answer
2. 462 views
The triprotic acid H3A has ionization constants of Ka1 = 9.9× 10–2, Ka2 = 2.7× 10–8, and Ka3 = 5.9× 10–11.a). Calculate
1. 1 answer
2. 929 views
Phosphoric acid is a triprotic acid with the following pKa values:pKa1=2.148 pKa2=7.198 pKa3=12.375 You wish to prepare 1.000 L
1. 1 answer
2. 1,001 views
A wall pennant is in the shape of an isosceles triangle. Each of the two equal sides measures 18 in more than the third side,
1. 3 answers
2. 1,831 views
Suppose that 10.9 mL of HNO3 is neutralized by 83.9 mL of a 0.0021 < solution of KOH in a titration. Calculate the concentration
1. 0 answers
2. 658 views
Suppose that 10.9 mL of HNO3 is neutralized by 83.9 mL of a 0.0021 < solution of KOH in a titration. Calculate the concentration
1. 1 answer
2. 1,099 views
Jill Ley took out a loan to pay for her child's education for $60,000. The loan would be repaid at the end of 8 years in one
1. 1 answer
2. 809 views
Where do the perentheses go to solve this problem :7 - 6 x 7 DEVIDE 5 + 7 = -43 2/3
1. 0 answers
2. 384 views
At a certain temperature, 0.900 mol of SO3 is placed in a 2.00-L container.2SO3(g)<--> 2SO2(g)+O2(g) At equilibrium, 0.130 mol
1. 5 answers
2. 4,369 views
Phosphorus pentachloride decomposes according to the chemical equation:PCl5(g)<--> PCl3(g)+Cl2(g) Kc = 1.80 at 250 degrees
1. 3 answers
2. 1,588 views
solve the system of equations in three variables-3x+y-z=-10
1. 4 answers
2. 863 views
solve the system by substitution..-3x-5y=-17 4x=y-8
1. 3 answers
2. 513 views
Calculate the energy of a photon of frequency 35.0 MHz (MHz is a mega hertz or 1 x 106Hz).
1. 2 answers
2. 563 views
A water wheel has a radius of 15 ft. A river passing through the water wheel turns the wheel at 11 revolutions per minute(rpm).
1. 1 answer
2. 956 views
A water wheel has a radius of 15 ft. A river passing through the water wheel turns the wheel at 11 revolutions per minute(rpm).
1. 1 answer
2. 637 views
1. ~(RvR)2. I> (R*R) ~I
1. 0 answers
2. 273 views
What can we say about the force of an object when the mass increases and acceleration remains constant?
1. 1 answer
2. 798 views
A car and a truck are on the highway. Both need to accelerate at 7 m/s2in order to avoid an accident. a. Find the force acting
1. 1 answer
2. 422 views
A force of 20 N is applied to a box of books with a mass of 4kg. Find the acceleration of the box of books.
1. 1 answer
2. 476 views
determine whether the pair of equations represents parallel lines4x=5y-5 10y=10-8x
1. 1 answer
2. 648 views
a 0.30 kg mass attached to a spring is pulled back horizontally across a table so that the potential energy of the system is
1. 1 answer
2. 2,327 views
At the low point in its swing, a pendulum bob with a mass of 0.2 kg has a velocity of 4 m/s What is the Kinetic at the low
1. 1 answer
2. 3,484 views
Please solve the system with the elimination method. Explain each step as it is performed.5y = x 2x - 3y = 7
1. 1 answer
2. 549 views
On a 30 day calendar which begins on a Wednesday and ends on a Thursday, what is the probability in a random drawing that the
1. 1 answer
2. 387 views
scientific notation for (5.5*10^-8)(8*10^-2)I got (5.5*8)(10^-8*10^-2) then 44*10^10 What am I doing wrong?
1. 2 answers
2. 333 views
cubic root of 27x^4 y^13
1. 2 answers
2. 420 views
how do you solve 2w^9(5w)(4w^10)
1. 1 answer
2. 307 views
how do you simplify kz(k+1/z)
1. 1 answer
2. 322 views
how to solve the formula for the indicated letter for x= w + y + z/4 for y
1. 1 answer
2. 307 views
determine the quantity of heat needed to convert 17.0g of solid mercury at -50.0C to mercury vapor at 25C . Specific heats: ,
1. 1 answer
2. 618 views
Consider the experiment of choosing the top 7 cards from a shuﬄed deck in two ways:(a) Without replacement. 1. What is the
1. 0 answers
2. 449 views
Chase scored 14 points on Monday, and he doubled his score each day thereafter. How many points did he score on Thursday?A. 224
1. 5 answers
2. 4,103 views
Solve the system using elimination.2x – 2y = –8 x + 2y = –1 And this one: Solve the system using elimination. 3x – y =
1. 1 answer
2. 1,324 views
Find a solution to the following system of equations.-5x + y = -5 -4x + 2y = 2
1. 1 answer
2. 1,958 views
Hey, I don't undertand how to solve this equation using substitution.3y = -1/2x + 2 y= x + 9
1. 1 answer
2. 404 views
The sum of two numbers is 82. Their difference is 24. Choose the system of equations that describes this situation. Solve by
1. 2 answers
2. 1,362 views
Solve the system of equations using substitution.y = x + 6 y = –2x – 3
1. 5 answers
2. 1,924 views
Solve the system of equations using substitution.y = 2x – 10 y = 4x – 8
1. 2 answers
2. 1,471 views
Identify the graph of the pair of equations as parallel, intersecting, or identical.y = 5x – 4 y = 5x – 5
1. 1 answer
2. 382 views
Does the system of equations have no solution, one solution, or infinitely many solutions?y = 2x – 3 y = –x + 3
1. 1 answer
2. 624 views
Does the system of equations have no solution, one solution, or infinitely many solutions?y = x + 4 y – 4 = x
1. 1 answer
2. 511 views
Which graph represents the following system of equations?y = 3x + 3 y = –x – 3
1. 2 answers
2. 2,117 views
When a metal pipe is cut into two pieces, the lowest resonance frequency in one piece is 244Hz and that for the other is 454Hz.
1. 0 answers
2. 1,015 views
Suppose I put 1 billion bacteria in a 10 ml tube of saline, mix well, and label this tube A. Answerthe following questions: 1.
1. 1 answer
2. 598 views
Suppose I put 1 billion bacteria in a 10 ml tube of saline, mix well, and label this tube A. Answerthe following questions: 1.
1. 1 answer
2. 558 views

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