Thursday
October 2, 2014

Posts by jane


Total # Posts: 1,370

physics
You and your friend are on the roof of a 20 m tall building investigating a free fall. Your friend releases a small rock from rest. You throw another rock simultaneously with your friend aiming it straight down. (a) What initial speed should you supply to the rock so it hits ...
September 28, 2014

English
I need to create a diagram of hell similar to Dantes Inferno. What punishments would teach the following sins a lesson: Liars Thieves Cheaters Abusers Kidnappers Traitors Murderers Fraudsters Assualters
September 28, 2014

physics
A pot with a flower falls out of a window box in a tall apartment building. It passes the top of a particular window with a velocity of -1.7 m/s. It passes the bottom of this window 0.2800 s later? How tall is the window (watch sign)?
September 27, 2014

Chemistry
Please help! Calculate the standard change in enthalpy, ΔH°rxn, for the decomposition of calcium carbonate to calcium oxide CaCO3 (s) → CaO (s) + CO2 (g) Given that: ΔH°f CaCO3 (s) = -1206.9 kJ/mol ΔH°f CaO (s) = -635.1 kJ/mol ΔH°f CO2...
September 27, 2014

physics
A ball falls 5.00 m to the ground. It remains in contact with the ground for 0.027 s and then rebounds to a maximum height of 1.61 m. What acceleration did the ball experience while it was in contact with the ground?
September 27, 2014

physics
A hot-air balloon is rising upward with a constant speed of 2.35 m/s. When the balloon is 2.50 m above the ground, the balloonist accidentally drops a compass over the side of the balloon. How much time elapses before the compass hits the ground?
September 24, 2014

Physics
An object is launched at an angle of 24 degrees above the horizontal at a velocity of 33.7 m/s from the top of a building which is 110.8 meters above the ground. When the object lands on the ground, what is the horizontal displacement from the base of the building in meters? ...
September 24, 2014

chem
A .7567 impure KHP was dissolved in water. 26.7 ml of standardized 0.068 M NaOH was used to achieve a phenolphthalein end point. The stoichiometric ratio between KHP and NaOH is 1:1. What is the percent by mass of KHP in the sample?
September 23, 2014

Math
cos 60 = 1/2 sin 60
September 23, 2014

chem
a 50ml aliquot sample of vinegar is titrated with a 0.078 M NaOH sol'n. The phenolpthalein end point was reached after the addition of 35.6 ml. Equation: HC2H3O2 + NaOH _____> NaC2H3O2 + H20 Calculate the % by mass/vol. of acetic acid in the sample.
September 23, 2014

sociology
in order to establish society, humans agree to obey certain rules.
September 23, 2014

physics
To what temperature must you raise a copper wire, originally at 20.0°C, to double its resistance, neglecting any changes in dimensions? (Does this happen in household wiring under ordinary circumstances?)
September 13, 2014

physics
The resistivity of silver is 1.59 × 10-8 Ω·m. What is the resistance of a section of 12 gauge wire (diameter 0.2057 cm) that is 8.60 m long?
September 13, 2014

BASIC ACCOUNTING
paid two months rent deposit and one month advance, P40,500
August 23, 2014

Maths Help!!
Melisa used 0.6kg of red sand to make a mural on the wall. She added 250g of blue sand to it. Finally she added 500g of white sand to half of the mixture. Find the mass of the mixture that has white sand in it. Express your answer in kilogram
August 15, 2014

Maths
In a basket, 3/4 of the fruits are oranges and the rest are apples. After I have away 10 oranges, there are now 1/2 as many oranges as apples. How many apples and oranges are there in the basket?
August 14, 2014

Maths - Optimisation
Thank you so much for your help on this :) Just a question though.. After you say y = 2x, you sub in y as 4x? ie. =(x^2+4x^2)^(1/2) where did the '4x' come from?
August 8, 2014

Maths - Optimisation
I've been trying to work out this question for hours and I can't seem to figure it out. Question: "Point 'A' is situated in the bottom left hand corner of a vertical rectangle with the dimensions 6m x 3m. Point 'B' is situated in the opposite top ...
August 8, 2014

Chemistry
Calculate PH of 0.05 M solution of ammonium acetate
July 31, 2014

Math
got it. thank you so much!
July 30, 2014

Math
how did you get appr 171.9° in the first question?
July 30, 2014

Math
Not really, can you go through it with me?
July 30, 2014

Math
If A=<2,1> and B=<-1,1>, find the magnitude and direction angle for -2A +3B Find all specified roots: Cube roots of 8i A parallelogram has sides of length 32.7cm and 20.2cm. If the longer diagonal has a length of 35.1cm, what is the angle opposite this diagonal?
July 30, 2014

Math
how can i put that in the form of A cos B (t- C)+D and A sin B (t- C)+D?
July 30, 2014

EPIDEMIOLOGY
A case-control study of the relationship between liver cirrhosis and alcohol use. In this study, smoking is associated with drinking alcohol and is a risk factor for liver cirrhosis among both non-alcoholics and alcoholics. Explain whether smoking is a confounder.
July 13, 2014

Physics
I finally got #3!
July 10, 2014

Physics
Actually, I have 3 questions to solve. I know the 1st one requires Coulomb's constant, but I just can't get the formula to work. Ditto for the formulas for the other 2 questions. 1) A 6.3 μC point charge and a −1.7 μC point charge are separated by a ...
July 10, 2014

Physics
I don't understand what the "^2" means or how to use it in the equation.
July 10, 2014

Physics
I have the 1st two answers, I just don't know how to calculate the other two. Everything I have tried comes out with a wrong answer.   (a) 479.04e+8 m/s2   (b) 7.30627923e-7  s   (c)   m   (d)   J
July 10, 2014

Physics
A proton with mass 1.67×10−27 kg and charge 1.60×10−19 C accelerates from rest in a uniform electric field of strength 500 N/C. (a) What is the magnitude of the acceleration of the proton? (b) How long does it take the proton to reach a speed of 35,000 ...
July 10, 2014

Math
The 8th term of a g.p is -7/32 fine it's common ration if its first term is 28
July 6, 2014

Physics
You and a friend are playing a game of squirt-gun tag in a maze. Suddenly you see your friend's image in a small planar mirror (see illustration). You take a shot over the barrier in front of you and find that your friend is just at the end of the 7.0 m range of your ...
June 29, 2014

Algebra
multiply (n^3+8)(n-4) can you give me an example on how to solve this please
June 25, 2014

physics
A motor boat whose speed is 2.6 m/s in still water, needs to point upstream at an angle of 28.5 in order to travel straight across the river. Calculate the speed of the current and the resultant velocity of the boat across the river.
June 24, 2014

MATH
what is answer of this problem set X={X/X IS A BOY}
June 17, 2014

Algebra
solve grafically 3x-y=8, 6x-2y=8
June 16, 2014

Algebra
solve the problem grafically, 4y=x+4, x=2/3y+8/3
June 16, 2014

Physics
Show that the x-component of the tension force Fc in terms of its magnitude Fc is given by -0.3420 Fc
June 10, 2014

Physics
The length of a box is reduced to two third of its original value and the width and height are tripled. Calculate the factor by which the volume has changed. Am I on the right track? If not please help I am stuck. Thanks. V=LWH V=(L-2/3)(3W)(3H)
June 4, 2014

geometry
A hemispherical dome holds a volume of 486π..find the surface area (omit the area of the circle)? I just need the formulas id use
May 30, 2014

Cosine Law NEED HELP QUCIK
The minute hand of a clock is 12 cm long, and the hour hand is 10cm long. Determine the distance between the tips of the hands at 9:30pm, to the nearest mm. The answer is 17.5 cm I need to work on how to get to that answer!
May 27, 2014

Cosine Law NEED HELP QUCIK
For the next three questions, choose which is the most appropriate method to solve the problem, explain your answer. a) SOACAHTOA b) The Sine Law c) The Cosine Law d) The problem cannot be solved without further information 1) Yachts in a race have to sail a triangular course...
May 27, 2014

7th grade science
Energy & Environment Which of the following desribes an example of land reclamation? A)after an are is mined for copper ,the soil is replaced and new plants are planted. B)after a forest is clear-cut ,desertifications occur. C)after a forest is clear-cut,it is mined for copper...
May 27, 2014

Cosine Law
For the next three questions, choose which is the most appropriate method to solve the problem, explain your answer. a) SOACAHTOA b) The Sine Law c) The Cosine Law d) The problem cannot be solved without further information 1) Yachts in a race have to sail a triangular course...
May 25, 2014

Cosine Law
The minute hand of a clock is 12 cm long, and the hour hand is 10cm long. Determine the distance between the tips of the hands at 9:30pm, to the nearest mm.
May 25, 2014

Cosine Law
Find all missing sides/angles. Round each answer to the nearest unit. Angles/sides ABC (left to right) 1) Angle c= 70 deg side b= 28 yd side c= 26 yd 2) Side a= 18 cm Side b= 24 cm Side c= 28 cm
May 25, 2014

3D Shapes & Scale
Write an explanation of ONE of the following question: (your explanation should be in paragraph form and should be written for a reader who is completely unfamiliar with area/volume scale factors and the square-cube law) 1) Why can aquatic animals grow so much larger than land...
May 25, 2014

3D Shapes & Scale
An object is scaled up to be 1000x as large. How does the new surface area compare with the original surface area? How does the new volume compare with the original volume?
May 25, 2014

3D Shapes & Scale
A farmer makes hay bales that are 1m cubes. His trailer can haul 128 hay bales at once. He is going to buy a new machine that makes hay bales that are 2cm cubes. How many bales will fit on the trailer now? (Assume they all fit evenly) Show calculations
May 25, 2014

trig
A kite string is 65 metres long and makes an angle of 32 degrees with the ground. Calculate the height of the kite above the ground to the nearest metre.
May 25, 2014

geometry
Find the lateral area and volume of the right triangular prism. side lengths are 3,4,5 and height is 6.How do I find out the apothem?
May 22, 2014

Management
A firm is assigned the network part 132.99. It selects an 11-bit subnet part. (20 pts) a) Draw the bits for the four octets of the IP address of the first host on the first subnet. b) Convert this answer into dotted decimal notation. c) Draw the bits for the second host on the...
May 6, 2014

chemistry
the mass of a certain mixture of BaO and CaO is found to be exactly one half that of the mixed sulfates formed from it by the action of H2SO4. calculate the percentage of BaO and CaO in the mixture.
May 4, 2014

Algebra 2
Can someone please explain how to do this problem? A 450 foot tall building is near a shorter building. A person on top of the shorter building finds the angle of elevation of the roof of the taller building to be 25 degrees and the angle of depression of its base to be 35 ...
April 30, 2014

Math
How do you simplify this problem? (x + 4y − 5z) − (x − 3y + 6z)
April 23, 2014

arithmetic
a car traveled a distance of 195 miles in 3 hours 15 minutes what is the unit rate ? oris it answer 60 miles per hour
April 19, 2014

math
a car travelved a distance of 195 miles in 3 hours 15 minutes what is the unit rate
April 19, 2014

Physics
The acceleration due to gravity on Earth is 9.80 m/s2. If the mass of a dog is 40.0 kg, what is the weight of the dog?
April 18, 2014

Math
The longer leg of a triangle is one foot less than twice the shorter leg. The hypotenuse is 17 feet long. Find the area of the triangle.
April 15, 2014

Science
Explain some modifiable risk factors as well as some actions you can take to avoid dying from a lifestyle disease.
April 9, 2014

Science
How do lifestyle diseases differ from other diseases?
April 9, 2014

Algebra
Maria's average speed for a 6 hour trip was 40kph. For the first 4 hours, she drove at an average rate of 50kph. What was her average speed for the last 2 hours?
April 8, 2014

Algebra 2
How do I find the equation of an ellipse with: Vertices: (-7,10), (-7,-10) Foci: (-7, square root of 19) (-7, - square root of 19) I think the center is (-7,0) and a^2 is 49 I just don't know how to get c^2 so I cant get b^2
April 7, 2014

Biology
Can someone please tell me if I have the right answers? Pasteur's experiments led to which theory? A. biogenesis theory B. endosymbiont theory C. evolution theory D. spontaneous generation theory I think its A or D Scientists have fossil evidence for which idea for the ...
April 6, 2014

PreCalculus
The cost C (in dollars) of manufacturing x wheels at Deon's Bicycle Supply is given by the function C(x)= 0.1x^2-60x+22,744. What is the minimum cost of manufacturing wheels? Do not round your answer.
March 25, 2014

Math
if I have 1 defect in a batch of 54 widgets, what is my quality index?
March 21, 2014

science(check answers)
Emily
March 12, 2014

science(check answers)
I got 100%(Thanks:)
March 12, 2014

Computer Tech
Are they Daydreamin' and Yours Truly?
March 6, 2014

Computer Tech
I am doing a powerpoint/photoshop project in my computer tech class about a singer that has recently become famous in the world of music. The artist I am researching is Ariana Grande. When I was looking for her albums I found two: Daydreamin' and Yours Truly. Some websites...
March 6, 2014

Math
A golfer stands 420ft(140 yd) horizontally from the hole and 50ft above the hole. Assuming the ball is hit with an initial speed of 120ft/s, at what angle should it be hit to land in the hole? Assume the path of the ball lies in a plane.
March 6, 2014

Computer Tech
Thank you!
March 5, 2014

Computer Tech
I have to do a power point on a singer who has recently become famous. I chose Ariana Grande because she only has two albums. I have been trying to find her song and album release dates but cant find a website. Can someone please see if they could find one? It would be a big ...
March 5, 2014

Chemistry
2
March 5, 2014

Algebra 2
Thank you!
March 4, 2014

Algebra 2
Okay so I fixed the next two because I added the fractions wrong. 2. y=(1/2)x-(11/4) 3. y=(5/3)x-4
March 4, 2014

Algebra 2
What am I doing wrong? slope m=(8-6)/(1--5)= m=2/6= m=1/3 m=-3 midpoint (-5+1)/2, 8+6/2)= (-4/2, 14/2)= (-2, 7) y=mx+b= 7=-3(-2)+b = 7=6+b = 1=b equation y=-3x+1
March 4, 2014

Algebra 2
Can someone please check my answers? The question is: Write an equation for the perpendicular bisector of the line segment joining the two points. (-5,6),(1,8)= y=-3x+1 (1,4),(6,-6)= y=(1/2)x-(3/4) (5,10),(10,7)= y=(5/3)x-(17/3)
March 4, 2014

Algebra 2
Can someone please explain how to do this problem? A regional soccer tournament has 64 participating teams. In the first round, the number of games played decreases by a factor of one half. Find a rule for the number of games played in the regional soccer tournament. I tried ...
February 24, 2014

Algebra 2
I can't figure out how to find the n on top of the sigma. I have the rest of the equation but I just don't know what to do. I'll use "E" for sigma. nEi=1 (10-3i)=-28 Can someone please show me how to do this problem?
February 19, 2014

Algebra 2
I can't figure out how to find the n on top of the sigma. I have the rest of the equation but I just don't know what to do. I'll use "E" for sigma. nEi=1 (-5+7i)=486 Can someone please show me how to do this problem?
February 19, 2014

physics
A truck is pulling a car. FT is the magnitude of the force that the truck exerts on the car FC is the magnitude of the force that the car exerts on the truck Consider the following scenarios independently. 1)The truck is driving with a constant velocity, but as it turns out, ...
February 13, 2014

Science! just one question! help ASAP plzzz
Photosynthesis is required for this process to occur.
February 11, 2014

Algebra 2
Can someone please explain how to do this problem? Woodrow wins a tic-tac-toe game 65% of the time when he chooses the first square and 32% of the time when his opponent chooses the first square. The player who plays first is chosen by a coin toss. What is the probability that...
February 9, 2014

Algebra 2
Can someone please check my answers? Find the probability of drawing the given cards from a standard dick of 52 cards (a) with replacement and (b) without replacement. 1.A red card, then a black card a. 1/4 b. 13/51 2.A ten, then the ace of hearts a. 1/676 b. 1/663 3.A face ...
February 9, 2014

Algebra 2
Do I add them and that's it or do I do something else?
February 4, 2014

Algebra 2
Theres 12 face cards (4 queens, 4 kings, and 4 jacks) and 4 fours. What would you do with 12/52 and 4/52?
February 4, 2014

Algebra 2
How would you find the probability of drawing a face card and a 4 out of a standard deck of 52 cards? I got 4/13 but I don't think its right.
February 4, 2014

Algebra 2
Can someone please explain how to do this problem? The probability that it will rain today is 65%, and the probability that it will rain tomorrow is 25%. The probability that it will rain both days is 35%. What is the probability that it will rain today or tomorrow?
February 4, 2014

Algebra 2
Can someone please check my answers? A card is randomly drawn from a standard deck of 52 cards. Find the probability of drawing the indicated card. 1.Not an ace. =12/13 2.A face card and a four. =4/13 3.A heart or a diamond. =1/2 4.A six or a seven. = 2/13 5.An ace and a spade...
February 3, 2014

Algebra 2
Can someone please check my answers? A card is randomly drawn from a standard deck of 52 cards. Find the probability of drawing the indicated card. 1.Not an ace. =12/13 2.A face card and a four. =4/13 3.A heart or a diamond. =1/2 4.A six or a seven. = 2/13 5.An ace and a spade...
February 3, 2014

English
Would this be a good thesis to a paper about someone's life? Even though Karlee has a big interest in farming, she wants to take her life in a slightly different direction.
February 3, 2014

English
How do you write a thesis statement that doesn't sound like a roadmap. My teacher wants us to have a hook, which I have, then a thesis, and then the roadmap. I don't know how to write a thesis that doesn't sound like the roadmap.
February 3, 2014

am history
During the bitter struggle over reconstruction policy, Congress overrode Johnson's veto of the
January 29, 2014

am history
Which of the following nineteenth -century inventors is associated with Menlo Park in New Jersey? A. Gustavus F. Swift B. Alexander Graham Bell C. Cyrus W. Field D. Thomas Alva Edison
January 29, 2014

am history
General Grant's army came closest to defeat in the West as a result of a surprise Confederate attack at the Battle of
January 29, 2014

Algebra 2
How would I reduce the equation 7n=n-5n(n+4)
January 23, 2014

Algebra 2
Thank you
January 23, 2014

Algebra 2
What do I do after I have the equation at 8+64n = 8n
January 23, 2014

Algebra 2
Thank you
January 22, 2014

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