Friday
April 18, 2014

Posts by anonymous


Total # Posts: 68,173

Science asap
1. Which of the following describes the correct sequence of events during the water cycle? precipitation → condensation → evaporation → runoff condensation → precipitation → runoff → evaporation runoff → condensation → evaporatio...

physics
A glider with a mass of 3 kg is moving rightward at a speed of 2 m/s on a frictionless horizontal air track. It collides with a stationary glider whose mass is 18 kg. If the collision is elastic, what is the speed of the gliders after the collision? Use SI units in your answer...

Dramatic Scenes
Do I have to end a one-word stage direction with punctuation? I remember my teacher saying we have to do so, but an example he gave us doesn't. For example: MARY.[Sadly] I'm ready to go. Do I need a period after "Sadly?"

SS
Yes, I know, but which principle of the two has more influence on religious art?

SS
What religious principle has more influence on Jewish, Christian, and Islamic art, the belief in one god or the messages from the prophets?

History
Military strength?

History
How would be more accurate to describe how Islam spread through the Middle East, through military strength or from imperial command?

economics
nvmd got it.

economics
Consider the problem of a competitive firm which has fixed costs of $1000, semi-fixed-costs of $1000, and variable costs given by q^2. What is the maximum market price at which the firm decides to supply zero?

Physics
Stan the strongman lifts a 524 kg dumbbell from the floor to 1.69 meters above the floor at a constant velocity. How much energy does it take Stan to lift the dumbbell?

english
For example, if it is a sport, then some people wonder why cheerleaders must also be concerned with the neatness and uniformity of their appearance. In addition, since cheerleading does not require an opposing group of cheerleaders, some people question whether it can be consi...

Grammar
Oops...the "th" was a typo. Guess I was still sleepy :). Thanks for the help!

Grammar
Complete the form as soon as possible, but no later than March 23th. Complete the form as soon as possible, but not later than March 23rd. Which sentence is correct?

Calculus
Show, using limits, that f(x) = x2 – x + 3, is continuous at x = 2.

physics
A spring cannon is fastened to a glider at rest on a horizontal frictionless air track. The combined mass of the cannon and the glider is 0.560kg. The cannon fires a ball with a mass of 50g horizontally at a speed of 14 m/s. How fast does the cannon-glider assembly move backwa...

Math
Find the missing dimension of the cylinder. Round your answer to the nearest whole number. 1. Volume = 84 in.^3 r = 6 in. h = ? 2. Volume = 650 cm^3 r = 8 cm h = ?

English Answer Check--Please, help me!
Oh. Alright. Thank you.

English Answer Check--Please, help me!
Are there any more clauses in the sentences that I may have overlooked?

Evaluate This One!
Are there any more clauses in the sentences that I may have overlooked?

English Answer Check--Please, help me!
Underline the clauses in the following sentences. Identify each as an adverb clause or a noun clause. 1. When _he discovered the data were corrupt_, Swift knew he had to do something. A: Adverb clause. 2. Henderson belived that _any Multivac provided_ was unreliable. A: Noun c...

English Answer Check--Please, help me!
Underline the clauses in the following sentences. Identify each as an adverb clause or a noun clause. 1. When _he discovered the data were corrupt_, Swift knew he had to do something. A: Adverb clause. 2. Henderson belived that _any Multivac provided_ was unreliable. A: Noun c...

Math
When given that the attendance to Taylor Swift concerts had been decreasing at a rate of 2% from 2009-2013. If the average attendance at her concerts in 2013 was 20,480 what would be the attendance in 2009? Also, what would be the domain and range?

Math
x^4 - 81 (x^2 + 9)(x^2 - 9) (x^2 + 9)(x + 3)(x - 3)

Math
How would you factor x^4-81?

math
2. How is the graph of y = –2x² – 5 different from the graph of y = –2x²? (1 point) It is shifted 5 units up. It is shifted 5 units down. It is shifted 5 units left. It is shifted 5 units right. 3. A model rocket is launched from a roof into a large fi...

science(check answers)
1) Depends. Potentially renewable resources (like aquifers) are renewable unless they're withdrawn faster than they can renew themselves, in which case they can be exhausted. 2) B. You can grow more plants to make more biofuel, so it's renewable. 3) D. 4) Not sure, but...

Math algebra
Just think of Patrick's subscriptions as the variable p. Charlie wants to sell twice as many as Patrick, so he's gonna sell 2p subscriptions. We know that they both need to sell at least (meaning greater than or equal to) 100 subscriptions, so... (Patrick) + (Charlie) ...

Math algebra
1) Charlie plans to sell twice as many magazine subscriptions as Patrick. If Charlie and Patrick need to sell at least 100 subscriptions in all, what inequality could be used to determine how many subscriptions, x, Charlie needs to sell? I really don't understand this.

Human biology please help
A) Enzymes B) Proteins

Math
-23m - (-35m) = -48 -23m + 35m = -48 12m = -48 m = -4

physics
A 50-kg box is being pushed a distance of 7.1 m across the floor by a force whose magnitude is 175 N. The force is parallel to the displacement of the box. The coefficient of kinetic friction is 0.19. Determine the work done on the box by each of the four forces that act on th...

physics
B) W = Fd (1.5 x 10^-4) = (0.37 - Fg)d (1.5)(10^-4) = (0.37 - 9.8m)d (1.5)(10^-4) = [0.37 - (9.8)(2.1)(10^-4)]d 0.00015 = 0.368d d = 0.0004076 meters A) KE + PE = KE + PE (1/2)mv^2 + (0) = (0) + mgh (1/2)mv^2 = mgh (1/2)v^2 = gh v^2 = (2)(9.8)(0.0004076) v = 0.08938 meters per...

physics
Starting from rest, a 2.1x10-4 kg flea springs straight upward. While the flea is pushing off from the ground, the ground exerts an average upward force of 0.37 N on it. This force does 1.5x10-4 J of work on the flea. (a) What is the flea's speed when it leaves the ground?...

Math
Write a division equation that has a solution of -20

Math
You mean like an algebraic equation? 7x = 2 If that's not what you're looking for, maybe 2 x 1/7 = 2/7 will work.

Math
Write a multiplication equation that has a solution of 2/7

PHYSICS
The model airplane in Figure 5.6 is flying at a speed of 13.6 m/s on a horizontal circle of radius 19.1 m. The mass of the plane is 1.20 kg. The person holding the guideline pulls it in until the radius of the circle becomes 10.6 m. The plane speeds up, and the tension in the ...

math
Inversely means they're on opposite sides of the fraction (meaning one is the numerator, one is the denominator). So: 8/10 = 6/Y 8Y = 60 Y = 60/8 = 7.5 The answer is C.

k
A pole-vaulter just clears the bar at 4.07 m and falls back to the ground. The change in the vaulter's potential energy during the fall is -3900 J. What is his weight?

ph
A 64.4-kg skateboarder starts out with a speed of 1.95 m/s. He does 119 J of work on himself by pushing with his feet against the ground. In addition, friction does -260 J of work on him. In both cases, the forces doing the work are non-conservative. The final speed of the ska...

biology
This isn't too scientific or anything, since it's been a while since I took chem, but it could be that the solution was only able to hold a certain concentration of CO2. If your shortest blowing time was enough to completely saturate it, then the other trials with long...

PHYSIC
PEi + KEi = PEf + KEf mgh + (0) = (0) + (1/2)mv^2 mgh = (1/2)mv^2 (9.8)(4.07)m = 3900 m = 97.8 kg Fg = mg = (9.8)(97.8) Fg = 958 N

PHYSIC
A pole-vaulter just clears the bar at 4.07 m and falls back to the ground. The change in the vaulter's potential energy during the fall is -3900 J. What is his weight?

U.S. History
1. True 2. False 3. False 4. True

U.S. History
TRUE OR FALSE (The First World War) 1. Until 1915, most Americans thought of the war as a European conflict that would have little effect in the United States. 2. Big Berthas were massive ships used to transport German troops. 3. The Treaty of Versailles demanded that Russia a...

Math
It's kind of tricky to answer these, since more than one graph could work. However, I'd say that a line or bar graph (leaning more toward bar graph) would be good for #1, and a bar graph for #2 (unless you're allowed to use pie charts, in which case that would be t...

Math
What kind of graph would you use to show the number of twins born each year? I think a line graph Would you use a line plot or bar graph to display a survey of what teens do for entertainment after school? I think line plot

US History
Define beatnik.Why was such a person dissatisfied?

Math
Claudia weighed her puppy each moth. Explain which data display you would use to show the puppy's growth and why you think this is the best method of displaying the data. A line graph because it shows change over time

Math
The data shows how a family budgets it's weekly income. It uses percentages and weekly bills in dollars. Which graphs could you choose to display your data? I think the circle graph because your using percentages, and maybe a line graph

Math
What kind of graph would you use to show the number of twins born each year? I think a line graph Would you use a line plot or bar graph to display a survey of what teens do for entertainment after school? I think line plot

math
Brittany has a gift box in the shape of a cube.Each side of the box measures 15 cm. What is the volume of the gift box?

physics
Carmen is standing on a giant skateboard that is initially at rest. If we ignore frictional effects with the floor, what is the momentum of the skateboard if Carmon walks to the right with a momentum of 500 ? A. 500 to the right B. 500 to the left C. zero D. 500 thought it wou...

physics
C. Matter (mass) cannot be created or destroyed, it can only change.

physics
Under what conditions is mass conserved? A. Whenever the system is isolated or closed. B. Only when the change is a chemical one. C. Always. D. Only when the change is a physical one. I was thinking A.

physics
If Earth's mass were suddenly and magically reduced to half its present value, the Sun's gravitational force on Earth would A. be reduced by a factor of 2. B. be reduced by a factor of 4. C. increase by a factor of 2. D. remain the same. I was told it remained the same...

physics
22. On the surface of a certain planet, there is one unit of gravitational force exerted on every 0.4 units of mass. The gravitational field strength on this planet has numerical value A. 0.4 B. 2.5 C. 1.6 D. 1 C.1.6 is wrong

physics
V = (4/3)(pi)(r)^3 V = (4/3)(pi)(2r)^3 V = (4/3)(pi)8r^3 (4/3)(pi)(8)(r)^3 ÷ (4/3)(pi)(r)^3 Everything cancels out but the 8, so the answer is A.

physics
If you double the radius of a sphere, its volume increases by what factor? A. 8 B. 6 C. 2 D. 4 I thought maybe C.2 or D.4

physics
B. Centripetal acceleration goes inward, so it follows that centripetal force would do the same. The velocity of the horses and everything is tangent to the circular path, though.

physics
Your instructor rides on a merry-go-round turning at a constant rate. In which direction does the net force on your instructor point? A. away from the center B. toward the center C. down D. tangent to the circular path I choose D.tangent to the circular path (wrong again)

physics
A bug rides on a phonograph record. In which direction does the change in velocity of the bug point? A. toward the center of the record B. tangent to the circular path C. away from the center of the record D. up I thought C.away from the center of the record.

physics
If a ball is dropped from rest, it will fall 5 m during the first second. How far will it fall during the second second? A. 15 meters B. 10 meters C. 5 meters D. 20 meters the way the question is worded it seems it should be 10meteres but I think it wants total so would it be ...

physics
Which of the following could be considered to be an 'accelerator' in an automobile? A. brake pedal B. gas pedal (choose this one but says wrong) C. steering wheel D. All of these can cause the car to accelerate.

probability
???

L.A.
Has anyone here read A Retrieved Reformation? I have to write a dramatic scene about a conflict in that story. What conflicts can I use?

Physics
A group of swimmers is resting in the sun on an off shore raft. They estimate that 2.9 meters separates a trough and an adjacent crest of surface waves on the lake. In addition, they count 12 crests that pass by the raft in 16 seconds. What is the Period of these waves?

Physics
A hiker shouts towards a vertical cliff 305 meters away. The echo is heard 1.85 seconds later. How fast did the sound wave travel in air?

physics
A father (m= 90 kg) and son (m= 45 kg) are standing facing each other on a frozen pond. The son pushes on the father and finds himself moving backward at 3 after they have separated. How fast is the father moving?

physics
A friend is making an iMovie and wants your help designing a skateboard stunt. You estimate that your friend�s mass is four times greater than that of the skateboard. For the following questions, ignore friction. In one scenario, your friend starts by standing at rest o...

physics
Two air-track gliders are held together with a string. The mass of glider A is twice that of glider B. A spring is tightly compressed between the gliders. The gliders are initially at rest and the spring is released by burning the string. If glider B has a speed of 3 m/s after...

physics
A tennis ball (m= 0.2 kg) is thrown at a brick wall. It is traveling horizontally at 16 just before hitting the wall and rebounds from the wall at 8 , still traveling horizontally. The ball is in contact with the wall for 0.04 s. What is the magnitude of the average force of ...

physics
A 600-kg geosynchronous satellite has an orbital radius of 6.6 Earth radii. What gravitational force does Earth exert on the satellite? A. 13.8 N B. 90.9 N C. 138 N D. 909 N

physics
A solid lead sphere of radius 10 m (about 66 ft across!) has a mass of about 57 million kg. If two of these spheres are floating in deep space with their centers 20 m apart, the gravitational attraction between the spheres is only 540 N (about 120 lb). How large would this gr...

physics
An ashtray slides across a table with a speed of 0.9 and falls off the edge. If it takes 0.4 s to reach the floor, how far from the edge of the table does the ashtray land?

physics
What is the change in velocity if a car traveling 30{m}/{s} north slows to 20{m}/{s} north? A. 20{m}/{s} north B. 10{m}/{s} north C. 30{m}/{s} south D. 10 {m}/{s} south

physics 1
A 64.4-kg skateboarder starts out with a speed of 1.95 m/s. He does 119 J of work on himself by pushing with his feet against the ground. In addition, friction does -260 J of work on him. In both cases, the forces doing the work are non-conservative. The final speed of the ska...

physics 1
The model airplane in Figure 5.6 is flying at a speed of 13.6 m/s on a horizontal circle of radius 19.1 m. The mass of the plane is 1.20 kg. The person holding the guideline pulls it in until the radius of the circle becomes 10.6 m. The plane speeds up, and the tension in the ...

physics
A sled is being pulled across a horizontal patch of snow. Friction is negligible. The pulling force points in the same direction as the sled's displacement, which is along the +x axis. As a result, the kinetic energy of the sled increases by 47.5 percent. By what percentag...

Help
i'm sorry for not typing my answers first.

Help
Thank you very much.

Help
Oh. uh.. #1, A or c. but i'd go with A #2,B

Help
What is an example of bias in media? a website that presents a controversial opinion as though it were fact a television news program that presents both sides of a particular issue a podcast expressing an author’s opinion a blog about the history of the Civil War Why is m...

physics
A pole-vaulter just clears the bar at 4.07 m and falls back to the ground. The change in the vaulter's potential energy during the fall is -3900 J. What is his weight?

Science :(
Which of the following describes the correct sequence of events during the water cycle? precipitation → condensation → evaporation → runoff condensation → precipitation → runoff → evaporation runoff → condensation → evaporation &...

:(
pllzzz help

math. plzz help
calculate the slant height for the given square pyramid. Round to the nearest tenth. Pyramid base= 6cm height=5 cm 6.2 cm 5.8 cm 7.8 cm 7.2 cm Calculate the length of the diagonal for the given rectangular prism. Round to the nearest tenth. Length= 10 cm widith= 4cm height= 10...

math
if venom A is three times as potent as venom B and venom C is 2.2 times as potent as venom B. how much more potent is venom C compared to venom A?

math
if four out every seven individuals in a population of armadillos carry a gene for a defective enzyme, how many individuals carry the normal gene in a population of 869 armadillos?

Algebra 1 Answer Check
Factor this trinomial. -16x + 20x + 6 A: -2(4x + 1)(2x - 3)

Algebra 1 Answer Check
Factor this trinomial. 9x^2 - x + 2 A: (3x + 2)(x - 1)

math
Factor. 18x^3+24x^2-45x

algebra
If you multiply a number by six and then subtract negative ten, the difference is negative twenty. What is the number?

Math (check answers)
C.multiply

Physics
How many watts of power do you expend when you exert a force of 0.50N that moves a book 2.1m in a time interval of 1.1s ? Express your answer to two significant figures and include the appropriate units.

Physics
What is his kinetic energy when his potential energy reduces to 1000 J? Express your answer to two significant figures and include the appropriate units

Physics
What change in kinetic energy does an airplane experience on takeoff if it is moved a distance of 480m by a sustained net force of 5400N ? Express your answer to two significant figures and include the appropriate units.

Physics!
How many joules of potential energy does a 1.2-kg book gain when it is elevated 4.0 ? Express your answer to two significant figures and include the appropriate units.

Physics!
Calculate the watts of power expended when a force of 2.0N moves a book 2.4m in a time interval of 1.0 s. Express your answer to two significant figures and include the appropriate units.

Physics
the work done in lifting a 600-N barbell 1.6m above the floor. What is the gain of potential energy of the barbell when it is lifted to this height? Express your answer to two significant figures and include the appropriate units.

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