Friday

November 27, 2015
Total # Posts: 553

**physics**

1. There are three forces acting on an object, a 30N force pulling right, a 50N force pushing right, and 30N frictional force pushing left. a. What is the force of gravity on this 15kg object? b. If the object is on the ground what is the normal force acting on the object c. ...
*June 21, 2011*

**physics**

That is just what my homework says but it probably does mean north of west.
*June 21, 2011*

**physics**

1. a force of 30n with a direction of 35 degrees northwest acts on point p. Find: a) the northward component on the force b) the westward component of the force Please show work. Thanks!
*June 21, 2011*

**Physics**

2. Tyler pulls a box full of baby ferrets across the floor by means of a rope that is tied to the box. The rope makes an angle of 41 degrees with the horizontal and tyler pulls on the rope with a force of 60N. a)What is the horizontal component of the force that tyler is ...
*June 21, 2011*

**Physics**

James and Steve have a contest to see who can kick a football further. James kicks the football at an angle up of 57 degrees, and a speed of 75m/s. Steve kicks the ball with a speed of 100m/s, at an angle up of 48 degrees? Who wins the contest? Please show what each variable ...
*June 21, 2011*

**maths**

calculate the surface area of the following prism cuboid; 2cm 6cm 4cm what is the surface area of the cuboid
*May 21, 2011*

**maths**

calculate the surface area of the following prism cuboid; scm 6cm 4cm what is the surface area of the cuboid
*May 21, 2011*

**maths**

a prism has a cross sectional area of 8mm2 and a volume of 224mm3 calculate the length of the prism thank you so much for your help
*May 21, 2011*

**maths**

so the cube number is 3????
*May 21, 2011*

**maths**

3 x 3 x 3 = 27 27 is a cube number
*May 21, 2011*

**maths**

a cube has a volume of 27cm3 what is the length of one side of the cube
*May 21, 2011*

**geometry**

Find the length of segment AG in the figure if the prism is 8 ft by 9 ft by 12 ft.
*May 18, 2011*

**math urgent!!!!!!!!**

you have to isolate the x or the y. So move the 5x to the other side by subtraction,-4y=8-5x, then divide each part by -4, -4y/-4=(8/-4)-(5x/-4). Gives you y=-2+5/4x. Now plug that y into the original equation. 5x-4(-2+5/4x)=8... then once you get x plug that into the original...
*May 9, 2011*

**English**

I want to write a causal argument on how kids get hooked on unhealthy/processed foods (at home-- fast foods and at school-- vending machine and cafeteria hot lunches). I'm not quite sure what exactly to write about throughout a causal argument paper on this claim. What ...
*May 9, 2011*

**Abstract Algebra**

Let ø: G--> G' be a homomorphism from the group G to the group G'. Prove that ø(a)= ø(b) if and only if ab^-1 exists in Ker(ø).
*May 6, 2011*

**History **

The revolt in Hungary (1956), the demonstrations in Czechoslovakia(1968), and the formation of Solidarity in Poland (1980's) are similar in that they
*May 1, 2011*

**s.s (social studies) **

IS THIS RIGHT ? There comes a time in history,when the Americans must break away from england and become a separate nation , equal with other nations like god planned all along.We care about what the rest of the world thinks,therefore we will clarify why we are motivated to ...
*April 26, 2011*

**s.s (social studies) **

i dont get it
*April 26, 2011*

**s.s (social studies) **

can you help me translate the declaration of independence? first passage: When in the course of human events it becomes necessary for one people to dissolve the political bands which have connected them with another, and to assume among the powers of the earth, the separate ...
*April 26, 2011*

**Chemistry**

So basically for the first 3 answers (Part (A)(B)(C)): (A)and(B) - the concentrations would be equal since the mole ratio is equal and Q = K at equilibrium. (C) - the rate of both reactions would be equal also, as Q = k, right? (D)(1) - If the volume is increased at constant ...
*April 25, 2011*

**Chemistry**

PCl5 --> PCl3 + Cl2 (Kp = 630 at 546 K) A system is prepared by placing equimolar amounts of the three gases shown in the equation above in a suitable rigid container held at constant volume. Equilibrium is established at 546 K. (A) When equilibrium is established, how does...
*April 25, 2011*

**Life orientation**

Severally improve the worlds environmental problems,on the other hand,if the current way the worlds environmental problem is bing handled.
*April 8, 2011*

**Math**

Complete the square for this conic section in standard form: x^2+y^2-6x+4y-12=0
*April 3, 2011*

**science**

what kind of heat transfer causes earth's major wind patterns
*March 15, 2011*

**CALCULUS**

hi what is the derivativ of [-18(x^2)]/[(1+2(X^3))^2] ?? thanks!~
*March 10, 2011*

**Physics**

On a cold winter morning, a child sits on a sled resting on smooth ice. When the 9.20 kg sled is pulled with a horizontal force of 40.0 N, it begins to move with an acceleration of 2.50 m/s^2. The 23.0 kg child accelerates too, but with a smaller acceleration than that of the ...
*March 3, 2011*

**Abstract Algebra**

Let A= -{-1}, that is, the set of all real numbers except -1. Define an operation on A by a*b=a+b+ab (usual addition and multiplication in R) a) Show that * is closed on A b) show that * is associative c) Find the identity element for * and verify that it is the identity d) ...
*February 22, 2011*

**COLLEGE ALGEBRA**

Suppose that R is the set of real numbers. Let f: R--> R be defined by f(x)= mx+b, where m and b are real numbers and m is nonzero. Prove that f is a bijection.
*February 22, 2011*

**Math**

Jonathan can type a 20 page document in 40 minutes, Susan can type it in 30 minutes, and Jack can type it in 24 minutes. Working together, how much time will it take them to type the same document?
*February 15, 2011*

**US History**

How did Hitler respond to Germany’s obligations under the Treaty of Versailles when he became Germany’s leader?
*February 10, 2011*

**Abstract Algebra**

Let f:A->B where A and B are nonempty. Prove that f(S1 U S2) = f(S1) U f(S2)
*February 5, 2011*

**Algebra**

The slope formula is Y2-Y1/X2-X1. So it would be 1-2/2+2 which equals -1/4
*February 5, 2011*

**childcare**

OMG u guys aren't helping I'm gonna save all my answers and post them when I'm done
*February 1, 2011*

**science**

what do you want to know?
*January 31, 2011*

**geometry**

If the perimeter of a particular square is 2011 inches, what is the area of the square, in square inches? Express your answer in decimal form to the nearest hundredth.
*January 25, 2011*

**College Algebra**

Al gives 1/2 of his marbles to bev. bev gives 1/3 of these to carl. carl gives 1/4 of these to dani. If dani was given four marbles, how many did al have originally?
*January 23, 2011*

**algebra**

Nicole can jog to work in of an hour. When she rides her bike, it takes her of an hour. If she rides miles per hour faster than she jogs, how far away is her work? NEED HELP FAST
*January 21, 2011*

**Math**

After a recent series of home improvements, four couples were having a dinner party to discuss the additions to their homes. Mike had not recently had a new bathroom. Lorraine had not yet done her kitchen, but perhaps would update it next. Chris, who is married to Renée...
*January 16, 2011*

**algebra**

-13=3(x+2)-10
*January 13, 2011*

**Chem**

I don't understand what h is
*January 13, 2011*

**Chem**

What is the energy (e) of electromagnetic radiation having a frequency of 6.32 x 10^20 s^-1?
*January 13, 2011*

**adult education**

use lattice multiplication to find the prduct of 124 x 56
*December 16, 2010*

**accounting**

please help now!!!!!
*December 10, 2010*

**accounting**

This is the question: "Use page 3 of the journal. Jornalize and post the adjusting entries." Can you tell me how to do that?
*December 10, 2010*

**science**

ive been trying to find a report for 5th grade greenhouse effect science. how can i type it to find it?
*December 9, 2010*

**English(how is it?)**

Ya you do this by eating some bananas, there ya go
*December 1, 2010*

**Math**

period = 2ð/(ð/12) = 24 months amplitude = 4000 vertical displacement = 20 000
*December 1, 2010*

**Math**

The population size, P, of owls (predators) in a certain region can be modelled by the function P(t) = 1000 + 100 sin (3.14t/12), where t represents the time in months. The population size, p, of mice (prey) in the same region is given by p(t) = 20 000 + 4000 cos (3.14t/12). ...
*December 1, 2010*

**PHYSICS!!!**

By how many decibels does the sound intensity from a point source decrease if you increase the distance to it by a factor 6?
*December 1, 2010*

**PYSCIS!!!!**

By how many decibels does the sound intensity from a point source decrease if you increase the distance to it by a factor 6?
*December 1, 2010*

**Geometry**

I saw it after I typed in my response to avery. Thank you very much :)
*November 22, 2010*

**Geometry**

Could you please explain why the answer is no?
*November 22, 2010*

**Geometry**

Is it possible for a triangle to have sides with the following lengths: 5, 9, 15?
*November 22, 2010*

**college physics**

A mass of 1 kg is hanging from a spring with a spring constant of 3 N/m. At a distance of 0.2 m below the equilibrium it has a velocity of 1 m/s in the upward direction. What is the amplitude of the oscillation?
*November 21, 2010*

**College Chemistry**

Calculate the vapor pressure of a solution of 0.39 mol of cholesterol in 5.4 mol of toluene at 32oC. Pure toluene has a vapor pressure of 41 torr at 32oC.
*November 19, 2010*

**College Chemistry**

How much ice can be melted at 0oC by the condensation of 1.0 kg of steam at 100.oC? (ΔHfus of ice = 6.01 kJ/mol; ΔHvap of water = 40.7 kJ/mol)
*November 19, 2010*

**Math**

Four balls are simultaneously picked at random from a jar containing 2 red balls, 2 green balls, and 6 yellow balls. What is the probability that exactly two of the selected balls will be red?
*November 15, 2010*

**math**

To find the amount of the discount, you multiply the price by the percentage out of 100. So, 35x.25=8.75 This is the same as (X/35) x (25/100) So you are getting 8.75 off. And the price you pay is.. 35-8.75 = $26.25
*November 15, 2010*

**chemistry**

What reagent would allow you to distinguish between FeCl3 and PbCl2? (As if using an analysis scheme)
*November 15, 2010*

**Chemistry**

What reagent would allow you to distinguish between BaS and NiSO4? (As if using an analysis scheme)
*November 15, 2010*

**Chemistry**

What reagent would allow you to distinguish between AgNO3 and MNSO4? (As if using an analysis scheme)
*November 15, 2010*

**Chemistry**

What reagent would allow you to distinguish between AgNO3 and MNSO4? (As if using an analysis scheme)
*November 15, 2010*

**CHEM**

What reactions does Br- have, ones that would distinguish it as a anion? As in a anion analysis scheme?
*November 15, 2010*

**Chem**

Why is BaSO4 insoluble in HNO3?
*November 15, 2010*

**6th grade**

What is the volume of a chest that is 20 inches by 10 inches by seven and one tenth inches?
*November 8, 2010*

**Physics Help!!! **

With the energy needed to warm up some amount of water from 26°C to 44°C, how high could you lift it?
*November 8, 2010*

**Physics Help!!! solids and fluids**

During a transatlantic flight, you drink a bottle of water and tightly close its lid again. Back on the ground during taxiing to the terminal, you notice that the thin plastic bottle is crushed, and you eyeball it to be only about 80 percent of its original volume (the photo ...
*November 8, 2010*

**Chemistry**

How can you determine which of any two halogens is more active?
*November 7, 2010*

**Spanish 1**

B and C
*November 7, 2010*

**Physics HELP!!! potential energy**

Two identical metal plates with small holes are aligned a distance L=6.7 cm apart. They have a potential difference of 131 Volts. An electron can enter through the hole in the negative plate and exit through the hole in the positive plate. If it enters with a velocity of 3290 ...
*November 3, 2010*

**Physics HELP!!! Potentials and Fields**

Two identical metal plates with small holes are aligned a distance L=6.7 cm apart. They have a potential difference of 131 Volts. An electron can enter through the hole in the negative plate and exit through the hole in the positive plate. If it enters with a velocity of 3290 ...
*November 1, 2010*

**Physics HELP!!!**

A car (mass 920 kg) drives up a hill (height 328 m) in 143 seconds. At the bottom of the hill, it has a speed of 24 m/s, but at the top, it has slowed down to 14 m/s. Neglecting friction, what is the average engine power
*October 31, 2010*

**Physics HELP!!!**

A car (mass 920 kg) drives up a hill (height 328 m) in 143 seconds. At the bottom of the hill, it has a speed of 24 m/s, but at the top, it has slowed down to 14 m/s. Neglecting friction, what is the average engine power
*October 31, 2010*

**Physics**

So would it be 1/2*2.6^2/30
*October 29, 2010*

**Physics**

A flywheel has a moment of inertia of 2.6 kg·m2. What is the average power needed to spin it up from rest to an angular velocity of 100 rad/s in 30 seconds?
*October 29, 2010*

**physics:energy**

Okay I got it thanks for the help.
*October 27, 2010*

**physics:energy**

watts wouldn't be the units correct. My answer is 1456.785
*October 27, 2010*

**physics:energy**

How much power is needed to push a box (mass 27 kg) over a surface (coefficient of friction μk=0.5) with a velocity of 1.1 m/s?
*October 27, 2010*

**Physics: energy**

Thank you
*October 27, 2010*

**Chemistry**

How is the solubility of a solid affected by temperature?
*October 26, 2010*

**math**

Let C(q) represent the cost, R(q) the revenue, and π(q) the total profit, in dollars, of producing q items. a) If C′(67) = 65 and R′(67) = 86, approximately how much profit is earned by item number 68? b) If C′(149) = 120 and R′(149) = 98, ...
*October 8, 2010*

**physics**

thanks, i got them all except for the first one.
*October 4, 2010*

**physics**

true or false If a net force acts on an object, the object's speed will change. An object's velocity will change if a net force acts on the object. If two object have the same acceleration, they are under the influence of equal forces. The net force which acts on an ...
*October 4, 2010*

**English I**

What is feild or Scope? I am writing a book report on Lord of the Fies by William Golding.
*September 28, 2010*

**5th grade math**

16-(3x2)x2 16-(6) x2 16-(12) 4 4is the answer and in middle school when u have parensis u dont need to put an x before the nest multipliction number it means times already
*September 28, 2010*

**8th grade**

$1 for every 4 oz 12/4
*September 26, 2010*

**3rd grade**

they don't really learn algebra they just have a box where a middle or high school student would have a variable
*September 22, 2010*

**Physical Science**

thank you
*September 21, 2010*

**Physical Science**

If you did it wasn't for me :)
*September 21, 2010*

**Physical Science**

Need help please. the once with the ( ) is my answer but i am not sure if it right. Thanks for your help. 15. If the distance from a converging lens to the object is less than the focal length of the lens, the image will be A. real, inverted, and larger than the object. (B). ...
*September 21, 2010*

**4th grade**

My mom says that the glaciers are melting because of global warming.
*September 14, 2010*

**math**

1+j=2(2j+1)
*September 8, 2010*

**English**

Thank you very much.
*July 1, 2010*

**English**

Obviously, the police will use force if you do not cooperate. Is this grammatically correct? I need to write a sentence to show how a comma should be used after introductory words or groups of words.
*July 1, 2010*

**math**

The annual Salary of an electrical engineer is given in terms of the years of experience by the table below. Find the equation of linear regression for the above data and obtain the expected salary for an engineer with 45 years of experience. Round to the nearest $100. x y 2 ...
*June 19, 2010*

**math**

A test is composed of six multiple choice questions where each question has 4 choices. If the answer choices for each question are equally likely, find the probability of answering 3 OR 4 questions correctly. 0.131836 0.032959 0.004639 0.164795
*June 19, 2010*

**algebra**

Solve: 4 sqrt (x) = 8 + 2 sqrt (x) a) (-4) b) (16) c) none d) (4) c
*June 18, 2010*

**math**

simplify cot(-theta)tan(theta)
*June 7, 2010*

**Math**

FiberType HighCalorie LowCalori Totals High Fiber 18 4 22 Medium Fiber 23 6 29 Low Fiber 12 21 33 Totals 53 31 84 3. What is the probability that a cereal would both high calorie and high fiber? In other words, what is P(high calorie and high fiber)? 4. What is the probability...
*May 25, 2010*

**statistics**

Use this table to answer the questions. Height (in inches) Frequency 50-52 5 53-55 8 56-58 12 59-61 13 62-64 11 1. Identify the class width. 2. Identify the midpoint of the first class. 3. Identify the class boundaries of the first class. 4. Give the relative frequency for ...
*May 19, 2010*