Wednesday

May 25, 2016
Total # Posts: 161

**Physics**

Imagine we have two identical batteries with emf = 1.8V and an internal resistance of 0.6 ohms. Now we connect the batteries to a circuit with total resistance of 50 ohms. What is the maximum amount of power we can dissipate in the 50 ohm load? what is the minimum?
*April 20, 2016*

**physics**

the current in alightning strike is 7500A.the strike lasts for 240ms.calculate a,the charge in c ,which flows in the strike to the ground b,the number of electrons transferred to the ground
*March 2, 2016*

**physics**

a 25v heater has two elements, one of which is missing. if the resistance of the remaining element is measured to be 50 ohm,what must the resistance of a second element be when connected in parallel to maintain a current of 1 amp.
*February 27, 2016*

**physics**

current in a parallel resistive circuit remains the same in all parts of the circuit (true /false)why
*February 26, 2016*

**physics**

an electric heater with a resistance of 40 requires 220v across its terminals. a,what is the power dissipated in the resistor b,how much heat is transferred in 1hour
*February 25, 2016*

**Geometry (Law of Cosine or Sine)**

Thank you this helped so much!
*February 24, 2016*

**Geometry (Law of Cosine or Sine)**

two cars start moving from the same location but in different ways, then angle between them is 125. The first car moves 60 mph and the second car moves 75 mph how far apart are they after 2 hours and 45 mins?
*February 24, 2016*

**physics**

three resistors are connected in parallel R1=10, R2=50, R3=25.what is the equivalent resistance
*February 24, 2016*

**Spanish**

A would be the answer. Just look them up on google translate or the spanish dictionary. :)
*January 20, 2016*

**Math**

Awesome, thank you! :)
*January 20, 2016*

**Math**

Brody deposited $500 into an account that earns 4.2% interest compounded annually. He makes no additional deposits and no withdrawals. Approximately how much interest will the account have earned after 7 years? A $167 B $420 C $542 D $665 My possible answers are A or D. I'...
*January 20, 2016*

**i dont want help from sue**

First of all, you need to give us an answer so that we can CHECK your work. Not tell you the answer. Please come back with an answer, and we will gladly check it for you. Thank you.
*January 20, 2016*

**Math**

A carpenter was creating a fence around his back yard the rectangular yard measured 4 1/2 feet by 8 2/3 feet what is the perimeter of the backyard
*December 1, 2015*

**science **

how do i write a hypothesis for non truebreeding plants, i am in 7th grade
*November 17, 2015*

**Math**

Find the surface area of the right prism with the given features. The bases are right trapezoids with bases of lengths 8 and 14 perpendicular to one side of length 18; height = 11.
*April 10, 2015*

**Math **

Below is a table showing the cost lawn maintenance service charges for various commercial and retail properties. Cost of lawn maintenance ($) 640, 250, 500, 640, 720, 640, 250, 720 A. Find the mean absolute deviation for the lawn maintenance company B. Describe what this ...
*December 7, 2014*

**Social studies**

This helps alot
*December 2, 2014*

**Social studies**

Thank you sooooooooooooooooooooooooooooooooooooooooo much Ms. Sue
*December 2, 2014*

**Social studies**

I did but there wasn't any pacific website that were helpful could you pleas give me some website that would help me answer my question
*December 2, 2014*

**Social studies**

Why did: George Childress, Lorenzo de zavala, James fanin, Sam Houston, Antonio Lopez de Santa Anna, Juan N. Sequin, and William B. Travis come to Texas???? What role did each of them play during the Texas revolution?? How did each of them contribution to the texas revolution ...
*December 2, 2014*

**Calculus**

THANK YOU SO MUCH!!!
*November 28, 2014*

**Calculus**

What is the smallest possible slope for a tangent to y=x^3 - 3x^2 + 5x? (I'm unsure how to approach this problem, if you know how to solve it, please explain step by step. THANK YOU!!!)
*November 28, 2014*

**Math help!!!**

The members of the Farrell family are Mona, the mother; Scott, the father; Kellie, Katie, Kristin, and Karen, the daughter ; and Kyle the son Consider the ordered pairs (x,y) where x is the mother of y. A.. List the ordered pairs in this set B.. If you are given the mother'...
*November 20, 2014*

**Chemistry**

Well i have the dilution (mL/100mL) and absorbance. So to get concentration do I take the dilution and divide it by the volume of stock solution I used?
*November 20, 2014*

**Chemistry**

I wanted to get that graph but I didn't know how to find the concentration. Only way I can plot it is using concentration and absorbance
*November 20, 2014*

**Chemistry**

And the net weight for that is 3.6g (I'm not sure how to use it)
*November 20, 2014*

**Chemistry**

Yes we did ran an experiment for this but I was confused as to how I could find the stock solution absorbance. Here's the data I had obtained: - Unknown solution absorbance: 0.271 - Kool-Aid flavor: Cherry - Wavelength = 470nm - Mass of mix 1 transferred = 4.1378g - Volume...
*November 20, 2014*

**Chemistry**

Can you tell if Beer's Law holds for your stock solutions as well as in the calibration range? Why or why not? (P.S. this is a lab question and Beer's Law equation is: A(absorbance) = a(absorptivity) x b(path length) x c(concentration))
*November 20, 2014*

**Math**

The members of the Farrell family are Mona, the mother; Scott, the father; Kellie, Katie, Kristin, and Karen, the daughter ; and Kyle the son Consider the ordered pairs (x,y) where x is the mother of y. A.. List the ordered pairs in this set B.. If you are given the mother'...
*November 19, 2014*

**Math**

The members of the Farrell family are Mona, the mother; Scott, the father; Kellie, Katie, Kristin, and Karen, the daughter ; and Kyle the son Consider the ordered pairs (x,y) where x is the mother of y. A.. List the ordered pairs in this set B.. If you are given the mother'...
*November 18, 2014*

**chemistry**

A metal rod has a mass of 17.62 g. A graduated cylinder contains 29.9 mL of water. The metal rod is added to the cylinder. The final water level in the cylinder is 36.1 mL. What is the density of the metal rod?
*October 7, 2014*

**College Physics**

A box with a mass of 3.5 kg is resting on a horizontal frictionless incline plane which is inclined at 28 degrees. Another force is applied at an angle of 13 degrees above the direction parallel to the incline. What does the magnitude of this force need to be, in Newtons, such...
*October 1, 2014*

**Physics**

A rock is dropped into a deep hole and 2.2 s later the sound of striking the bottom is heard. If the speed of sound is 340 m/s, what is the depth of the hole?
*September 5, 2014*

**Science**

how is energy produced during a nuclear fusion reaction?
*June 1, 2014*

**science**

I agree with Skylar. Answers above are wrong. Correct ones are BDCA
*February 27, 2014*

**Maths**

Factorise to quadratics X^2+5x-14 X^2-x-90 X^2-13x+40
*November 18, 2013*

**Maths**

Ummm I actually do noe but I just wanted to make sure. Plus I've finished my work already .
*November 13, 2013*

**Maths**

I know it's 125/27 but I need it with a whole number and a fraction
*November 13, 2013*

**Maths**

(9/25)^-3/2
*November 13, 2013*

**Trigonometry desperate help, clueless girl here **

2. solve cos 2x-3sin x cos 2x=0 for the principal values to two decimal places. 3. solve tan^2 + tan x-1= 0 for the principal values to two decimal places. 4. Prove that tan^2(x) -1 + cos^2(x) = tan^2(x) sin^2 (x). 5.Prove that tan(x) sin(x) + cos(x)= sec(x) 6.Prove that tan(x...
*August 16, 2013*

**trig help much appreciated! :))**

alright, I will. Thanks
*August 16, 2013*

**trig help much appreciated! :))**

1. Find the complete exact solution of sin x = . 2. Solve cos 2x – 3sin x cos 2x = 0 for the principal value(s) to two decimal places. 3. Solve tan2 x + tan x – 1 = 0 for the principal value(s) to two decimal places. 4. Prove that tan2 – 1 + cos2 = ...
*August 16, 2013*

**trigonometry help please :(**

2) Simplify √-1-4/5-√-1 A.-1/24+19/24i B.-21/26+1/26i C.-19/24-1/24i D.-1/26-21/26i 3) How many petals do the two rose curves r = 9 cos 61θ and r = 8 sin 60θ have combined? A. 182 B. 242 C. 181 D. 131 4)What is true of the curve r = ƒ(θ) if its ...
*August 16, 2013*

**Trigonometry **

1. Which of the following statements are true? (i) r = 4 – 3 sin θ is the equation for a limaçon rotated 90°. (ii) r = 3 cos 8θ is the equation for a rose curve with 8 petals. (iii) rθ = 16 is the equation for a circle. A. (i) and (iii) B. (i) ...
*August 16, 2013*

**Trigonometry **

1. Which of the following statements are true? (i) r = 4 – 3 sin θ is the equation for a limaçon rotated 90°. (ii) r = 3 cos 8θ is the equation for a rose curve with 8 petals. (iii) rθ = 16 is the equation for a circle. A. (i) and (iii) B. (i) ...
*August 16, 2013*

**math**

c dmvnjkdnvjkdjfilbfl nsf bs
*June 20, 2013*

**economics**

Suppose the demand and supply for milk are described by the following equations: QD = 600 - 100P; QS = -150 + 150P, where P is price in dollars, Q D is quantity demanded in millions of gallons per year, and Q S is quantity supplied in millions of gallons per year 1. Use these ...
*May 10, 2013*

**math((PLEASE HELP!))**

Thank You Very Much
*May 2, 2013*

**math((PLEASE HELP!))**

A contractor has been asked to pave 15 miles of new road. Before he can set his price, he needs to know how much the cement will cost. If the road is 45 feet wide and 9 inches thick and the cost of cement is $35 per cubic yard, what will be the cost of the cement needed for ...
*May 2, 2013*

**Math**

A contractor has been asked to pave 15 miles of new road. Before he can set his price, he needs to know how much the cement will cost. If the road is 45 feet wide and 9 inches thick and the cost of cement is $35 per cubic yard, what will be the cost of the cement needed for ...
*May 2, 2013*

**chemistry**

if burning one mole releases 1310.0 kj, then how many moles will release 227.30?
*April 22, 2013*

**Physics**

What is the minimum height you would have to place a solid ball of mass M and radius R (I=2MR^2/5) on a hill in order for the ball to make it completely around a circular loop at the bottom of the hill? The diameter of the loop is D. Assume the ball rolls without slipping.
*April 3, 2013*

**algebra 1**

one more question... the length of a rectangle is 3 times the width. the area is 108 cm squared. find the dimension of the rectangle.
*April 2, 2013*

**algebra 1**

thanks
*April 2, 2013*

**algebra 1**

is it 5 and 9?
*April 2, 2013*

**algebra 1**

The length of a rectangle is 4m more than the width. The area of the rectangle is 45 m squared. Find the length and width. Please help!
*April 2, 2013*

**math (ms sue) **

how would I factor x to the thrid + 3x squared - x -3 I got (x+3) (x squared -1) and my teacher marked me wrong.
*March 27, 2013*

**algerba**

2k squared + 4k= 10 How would I solve
*March 26, 2013*

**history**

List the mexican war battles in order, by date.
*March 26, 2013*

**History**

Find at least 5 Mexican War battles that took place in Southern California. (Southern California = the ten southern counties.)
*March 25, 2013*

**writing**

My 5th grade year was coming to a close and I, personally, was really looking forward to summer. Two months of sleeping in late and doing whatever. How would I write this...
*March 18, 2013*

**Math **

1. What two numbers can be multiplied to equal -60 and added to be -11? 2. What two numbers can be multiplied to equal -36 and added to be -16? 3. What two numbers can be multiplied to equal 10 and added to equal -7? Thanks
*March 18, 2013*

**Math **

how would I solve 3 square of 6 times square of 6? Sorry, I don't know how to make radicals. Square of means radical
*March 6, 2013*

**Psychology - Please check my answers**

1. When considering marital separation and divorce as a social problem, an effective approach might be to: __x_a. develop counseling options for couples in crisis. ____b. focus on problems with the institution of marriage itself. ____c. develop anger-management programs for ...
*February 26, 2013*

**Psychology - Social Problems**

Please check my answers. 1. When considering marital separation and divorce as a social problem, an effective approach might be to: __x_a. develop counseling options for couples in crisis. ____b. focus on problems with the institution of marriage itself. ____c. develop anger-...
*February 26, 2013*

**math**

Are my answers correct?
*February 4, 2013*

**math**

perform the following unit conversion. 296 0z= ___________ lb 18.5, 55.5, 37, 74 My Answer is 18.5 Perform the following conversion. 32kg= ______ lb 16,320,70.4,14.4 My Answer is 70.4 Some people feel that the ideal temperature for an office space is 72.0 F. What is the ...
*February 4, 2013*

**Math/Fractions**

Thank you!
*February 3, 2013*

**Math/Fractions**

1.Find the LCD and add the fractions. 1/125+4/50= 11/125, 1/1250, 1/35, 551/6250 My answer is 11/125 2.Subtract; then reduce answer to lowest terms. 5/22-1/41= 227/902,183/901,183/902,61/301 My answer is 183/902
*February 3, 2013*

**Fractions**

72, Thank you!
*February 2, 2013*

**Fractions**

Eighty people were invited to vote in the extension club's elections and 9/10 of them voted. How many people voted in the elections? 74, 73, 72, 75 My answer is 73
*February 2, 2013*

**American Gov't**

B. The text says in 1945, the US emerged as a global superpower, a giant in world trade, and the recognized leader of the noncommunist world. C. Because of the presidents constitutional authority as a chief diplomat & military commander & the special demands of foreign policy ...
*January 28, 2013*

**American Gov't**

The president's role in foreign policy increased largely because: A. Congress proved so inept in foreign affairs that the American people demanded a change. B. America became more of a world power. c. of the need to coordinate national economic policy and foreign policy, a...
*January 28, 2013*

**Math**

Suppose you have a graph of a polynomial function and you can see that the function increases without bound on both left and right ends, has 4 real zereos and has 5 turning points. Based on this information, what is the minimum degree of the polynomial?
*January 27, 2013*

**math**

father gives his son three coins totaling 55 cents for school lunch. What coins did the boy receive if one coin is not a nickel?
*December 3, 2012*

**Physics**

A top-gun pilot, practicing radar avoidance maneuvers, is flying horizontally at 1300 km/hr, just 35 m above level ground. Suddenly, the plane encounters terrain that slopes gently upwards at 5, an amount difficult to detect visually. If the pilot doesn’t correct ...
*November 11, 2012*

**Calculus -- HELP!**

If 1200 square centimeters of material is available to make a box with a square base and open top, find the largest possible volume of the box.
*October 20, 2012*

**Calculus**

Use Newton's Method to approximate the positive root of the function f(x) = (x^5) - 20 Show each iteration until successive iterations agree to six decimal places.
*October 20, 2012*

**intermediate algebra**

Y varies directly with square root of X. Y=3 when X=4. find Y when X=1
*October 1, 2012*

**business math**

Hello,I'm just confuse with this problem: Find the due dates of each of the following notes. 1.) Date of loan: October 16, 2001; Time: 120 days. My answer is February 14, 2002.. Im just wondering if my answer is correct.? Thanks.
*September 26, 2012*

**geometry**

6 centimeters i think!
*September 26, 2012*

**math**

find the shift and pick appropriate points. g(x)= -|x-1|+4
*September 25, 2012*

**intermediate algebra**

write the expression in form of a+bi (-2-3i)(1+4i)
*September 25, 2012*

**intermediate algebra**

solve an inequality and indicate the solution set, in interval notation. i need the steps that way i can study it and try to do the rest on my own. 3x+1>2andx-2<7
*September 25, 2012*

**chemistry**

how many joules of nutritional energy are in a bag of chips whose label reads 245 Cal? if 1 lb of fat is stored by the body for each 14.6X10(3) KJ of excess nutritional emergency consumed.how many bags of chips contain enough nutritional energy to result in 1lb of body fat?
*September 11, 2012*

**science **

iron and sulphur reaction
*May 23, 2012*

**mathTonyaMath**

Could you please expalin how you got this answer?
*November 1, 2011*

**Psychology**

How is our behavior affected by others?
*October 23, 2011*

**Physics**

A hovercraft of mass 77.0 kg can move on a horizontal surface, the x-y plane. A single unbalanced force acts on the hovercraft, but the size of the force is unknown. The hovercraft initially has a velocity of 6.0 m/s in the positive x direction and some time later has a ...
*October 10, 2011*

**College Physics**

The driver of a 1600 kg car, initially traveling at 10.6 m/s, applies the brakes, bringing the car to rest in a distance of 23.0 m. (a) Find the net work done on the car. (b) Find the magnitude and direction of the force that does this work. (Assume this force is constant.)
*October 10, 2011*

**Physics**

Tarzan, who weighs 899 N, swings from a vine through the jungle. How much work is done by the tension in the vine as he drops through a vertical distance of 4.45 m?
*October 4, 2011*

**algebra 2**

3x-2y+z=9 x-y+4z=10 2x+3y-z=53
*September 8, 2011*

**math**

please help me
*September 7, 2011*

**math**

1. 5+3*9/3-(-7)= 2. -12*(10-20)<100= help please!!
*September 7, 2011*

**Algebra 8th**

How do you multiply and simplify radical 2(radical 8+ radical 5)?
*May 13, 2011*

**riddle**

what starts with "ne" and is one of nine, and ends with "ne" and is eighth in line
*May 11, 2011*

**SCIENCE HELPP**

You are riding a sled across frictionless ice. It has been given an initial push and is now traveling at a constant velocity, in a straight line.Snow is falling vertically (as seen by a person standing still on the ice), and the snow is accumulating on the sled. You have three...
*May 1, 2011*

**Science**

SRRY You are riding a sled across frictionless ice. It has been given an initial push and is now traveling at a constant velocity, in a straight line.Snow is falling vertically (as seen by a person standing still on the ice), and the snow is accumulating on the sled. You have ...
*May 1, 2011*

**Science**

You are riding a sled across frictionless ice. It has been given an initial push and is now traveling at a constant velocity, in a straight line. Snow is falling vertically (as seen by a person standing still on the ice), and the snow is accumulating on the sled. You have ...
*May 1, 2011*

**chemistry**

4 Fe(s) + 3 O2(g) 2 Fe2O3(s) ΔH = -1652 kJ How much heat is released when 3.82 mol iron is reacted with excess O2?
*March 13, 2011*