Sunday

July 5, 2015

July 5, 2015

Total # Posts: 784

**physics/calc**

An anchor weighing 110 lb in water is attached to a chain weighing 2 lb/ft in water. Find the work done to haul the anchor and chain to the surface of the water from a depth of 35 ft.
*March 21, 2014*

**math**

if someone walks 5km in 21 minutes and then 4 km in 39 minutes then whats his average speed
*March 12, 2014*

**economics**

I think that the answer is 2*sqrt(1000)
*March 12, 2014*

**Physics**

Find Us=1/2k(deltax)^2 =1/2(180)(.15)^2 =2.025 This is spring potential energy. This must have been conserved from kinetic energy. Therefore Us=K=1/2mv^2 2.025=1/2(.195+.005)(v^2) v=4.5 m/s This is explains the time that the bullet is imbedded in the wood. To find the speed of...
*March 11, 2014*

**Chemistry**

How does Le Chatelier's principle explain the result you obtained when you add HCL to a suspension of Ca(OH)2 in water? Where the result was, precipitate dissappeared and an increase in temperature resulted.
*February 24, 2014*

**chemistry**

What is the molality of a solution composed of 28.4 g of methanol CH3OH and 250 g of water
*February 18, 2014*

**trig**

Given csc theta= 4, cot theta < 0 Find the exact values of cos theta and tan theta
*February 11, 2014*

**History**

Europeans were drawn in to sub-Saharan Africa in their quest for? a. gold and diamonds. b. diamonds and slaves. c. gold and slaves. d. slaves only. I can't find the correct answer. Please help! I believed it was gold and slave but it is not an option.... or is it c?? what ...
*December 14, 2013*

**History**

All are countries that were prominently Catholic in the 1500's and remain so today except? Spain France Italy Netherlands --- From my research, I see that Spain and Italy's main religion is Catholic. So I assume those two are not it. But I am confused on France and ...
*December 13, 2013*

**trig**

Juana and Diego Gonzales, ages six and four respectively, own a strong and stubborn puppy named Corporal. It is so hard to take Corporal for a walk that they devise a scheme to use two leashes. If Juana pulls with a force of 23 lbs at an angle of 18Â° and Diego ...
*December 12, 2013*

**English **

It is very general question. I am supposed to write 2,000 words analytical essay but my teacher told me based on my topic I need to write it in journal entry with only intro being 200 words. When I hear "journal entry", it is not the same as an essay. Do you think ...
*December 9, 2013*

**English **

I have hard time understanding this wordings :( Turner thesis* by about a hundred years: the myth of the American west did more than anything else to shape the American character. Civilization by its very nature takes away our freedom, but as Americans we can always find ...
*December 3, 2013*

**Geometry**

The diagonal of a rectangle are 24 inches long intersect at an angle of 60°.Find the perimeter of the rectangle.Pls help me.
*December 2, 2013*

**Geometry**

The diagonal of a rectangle are 24 inches long intersect at an angle of 60°.Find the perimeter of the rectangle.Pls help me.
*December 2, 2013*

**Geometry**

The diagonal of a rectangle are 24 inches long intersect at an angle of 60°.Find the perimeter of the rectangle.Pls help me.
*December 2, 2013*

**Geometry**

The diagonal of a rectangle are 24 inches long intersect at an angle of 60°.Find the perimeter of the rectangle.Pls help me.
*December 2, 2013*

**Geometry**

The diagonal of a rectangle are 24 inches long intersect at an angle of 60°.Find the perimeter of the rectangle.Pls help me.
*December 2, 2013*

**Statistics 1**

10
*December 1, 2013*

**Bio**

A______ is a tentative, testable explanation for an observed phenomenon. I am confused with hypothesis and theory. But my guess is hypothesis. is this true? or am I wrong?? thanks
*November 28, 2013*

**Bio**

What type of polysaccharide is the main source of fiber in our diet? My guess was cellulose. Is this correct?
*November 28, 2013*

**Math**

There were 7 times as many marbles in Box A as in Box B. After Joyce transferred 294 marbles from Box A to Box B, both boxes had the same number of marbles. How man marbles were there in Box A at first.
*November 20, 2013*

**Statistics**

57.14%
*October 28, 2013*

**math**

suppose 3 students change their vote from math to science .describe how the frequency table would change
*October 9, 2013*

**Math**

Its a big gigantic X . Thats the diagram. Its a vertical angle
*September 29, 2013*

**Math**

So im told to find the value of each variable. It's a X. One side equals 3xº and the other side says (80-x)º 3x=80-x 4x=80 x=20 As you can see the value I got was 20. But in another question it tells me to find the measure of the labeled angles. How do I do that?
*September 29, 2013*

**Algebra HELP!!**

Find the measure of each angle. Angle A is half as large as its complement angle B
*September 29, 2013*

**math**

2x-6/3=-2
*September 24, 2013*

**Physics**

36 seconds
*September 22, 2013*

**Chemistry**

A solution is made by mixing 90.6 g of magnesium sulfate heptahydrate with 2320.0 g of water. 690.00 mL of the solution has a mass of 745.20 g. 1. What is the molarity of the magnesium sulfate solution? 2. What is the molarity of the magnesium ion? 3. What is the molality of ...
*September 11, 2013*

**Math**

A second hand Furniture store buys sofas with a list price of 9,500. IF the wholesaler offers trade discounts of 10/20/30, find the single equivalent discount.
*August 31, 2013*

**math**

In the standard (x,y) coordinate plane, the graph of (x + 3)2 + (y + 5)2 = 16 is a circle. What is the circumference of the circle, expressed in coordinate units?
*August 14, 2013*

**Math- Urgent**

Thank You so much the link was helpful and I found my answer :-)
*August 13, 2013*

**Math- Urgent**

What are the angle relationships formed when a third line intersects two parallel lines?
*August 13, 2013*

**Math- Urgent**

Yay!! Thank you so much Mrs. Sue you really helped me!
*August 12, 2013*

**Math- Urgent**

Oh. That makes more sense. Thank you. I have four more problems so I will work one more out so you could check it. -11=v/2-6 Add 6 to each side -11+6=v/2-6+6 -5=v/2 -5x2=v v=-10 Is this correct Mrs. Sue?
*August 12, 2013*

**Math- Urgent**

Okay. 3=r/16+4 My teacher told me to cross multiply so: 16x4=64 Then I get lost because I don't know the next step except to subtract three from both sides which gives you r/16=43.
*August 12, 2013*

**Math- Urgent**

Solving Equations 3=r/16+4 What does r equal? Please show all work.
*August 12, 2013*

**Math- Urgent**

Thank You
*August 12, 2013*

**Math- Urgent**

Solving Equations -7+b/15=-6 What does b equal? Please show all work.
*August 12, 2013*

**Physics**

Charge A has a charge of +2C. Charge B has a charge of -3C and is located 1 meter to the right of A. Charge C is located 1 meter to the right of Charge B and has a charge of -1C. If a fourth charge (Charge D) is placed 4 meters to the right of Charge B, how much charge must it...
*August 8, 2013*

**Calculus**

A fence 5 feet tall runs parallel to a tall building at a distance of 2 feet from the building. We want to find the the length of the shortest ladder that will reach from the ground over the fence to the wall of the building. Here are some hints for finding a solution: Use the...
*July 17, 2013*

**Calculus**

Find the positive value of x which satisfies x = 4.3cos(x). Give the answer to six places of accuracy. Remember to calculate the trig functions in radian mode
*July 17, 2013*

**Calculus**

the first two are wrong
*July 17, 2013*

**Calculus**

The equation 10(x-1)(x-2)(x-3) = 1 has three real solutions a<b<c where a = , b = , and c = . Enter your answers with at least six correct digits beyond the decimal point. Hint: Ask what the solutions are if the right hand side is 0 instead of 1, and use Newton's ...
*July 17, 2013*

**MATH**

A data set has the following points: (0, 2), (4, 1), (6, 0) The slope of the linear regression line is -0.32. Find the y-intercept of the linear regression.
*July 11, 2013*

**Physics**

anyone for 8
*June 15, 2013*

**physics**

Three objects of same heat capacity with temperature T1=200 K, T2=400 K and T3=400 K exchange heat with each other. They are isolated from the rest of the universe. Find the highest possible temperature one of them can reach in kelvin.
*June 4, 2013*

**math**

june5
*May 24, 2013*

**language**

the - definition of glommy is dismal or depressing is it denotative
*May 24, 2013*

**pyhsic question for count iblis**

iblis got the problem right. for those trying to use jiskha to cheat on the brilliant problems, there was a mistake made in the acceptable answers for this week's question.
*May 22, 2013*

**Physics**

how did you get 1.68?
*May 20, 2013*

**physics**

A car with a mass of 1000kg is travelling at a constant velocity. The force from the engine is 200Newtons. Calculate the acceleration of the car using the formula f=ma. How long will it take this car to travel 0-60 mph (n.b. 1mph = 0.45m/s)
*May 16, 2013*

**Physics**

formula for Q#8 part 1 or answer for α=84∘?
*May 11, 2013*

**math**

find the missing side of the triangle b=2.1 c=29
*May 6, 2013*

**Physics**

A massless spring, with K=425 N/m, is hung vertically with the bottom end of the spring at position Y.i. A 3.50 kg mass is attached to the bottom of the spring and allowed to fall and oscillate. A) How far below Y.i does the mass fall before coming momentarily to rest and ...
*May 1, 2013*

**Physics **

The planet Tralfamador is a planet of mass M and radius R, and very thin atmosphere (neglect air resistance). A magnetic rail gun has been mounted on the surface of Tralfamador at the North pole. A projectile of mass m is fired from the magnetic rail of gun with an unknown ...
*May 1, 2013*

**Physics**

Some communication satellites are put into a circular geosynchronous orbit in which the satellite remains above a certain position on the earth's equator as it orbits. Such a satellite would always be in the same position in the sky as seen from the transmitting or ...
*May 1, 2013*

**math**

4 o'clock am on Tuesday
*April 30, 2013*

**math**

there is a 20% chance that it will snow on tuesday and a 50% chance that it will snow on Wednesday. what is the probabilty that it will snow on either day?
*April 28, 2013*

**chemistry**

if the amount of radioactive iodine-123 in a sample decreases from .400g to .100g in 26.2 hours, what is the half-life of iodine-123
*April 18, 2013*

**chemistry**

You can look them up in a chart. Try going to engineeringtoolbox website. They have a very useful chart of the specific heat of metals
*April 16, 2013*

**chemistry**

Delta (triangle) E is the change in internal energy. E(final)-E(initial) 25-12= 13 = E(final) 13-25= -12kj= Delta (triangle)E
*April 16, 2013*

**Quantum Physics**

C'mon @cheers!! get some rest :) 5A is not (0,-1), or (0,1/sqrt(K)) or (0,-1/sqrt(N)) xD It must be something very close to it... I think the answer is translating the grover algorithm to a Bloch Sphere and see how it moves around the surface :) At least, that is what 5B,c...
*April 16, 2013*

**Quantum Physics**

wow! Strange behaviour @cheers xD Nevertheless good news for 5C :D Now, only 5A remains behind the Fortress of Solitude...
*April 16, 2013*

**Quantum Physics**

5A is not -1/sqrt(N) or any combinations with minus sign.
*April 16, 2013*

**Quantum Physics**

Ok, 5C is 1/sqrt(K) for both of them. I cannot figure out what is 5A... :(
*April 16, 2013*

**Quantum Physics**

Hi PhysTech, I am reading an article from twistedoakstudios(at)com in /blog/Post2644_grovers-quantum-search-algorithm and doing some calculations... Seems cyclic, in a geometric view.
*April 16, 2013*

**Quantum Physics**

Hi! I have just done 5B: ay=-1, ax=0, so, cheers and PhysTech, it must something about a cycle of the states from m-2, m-1, m, m+1, m+2
*April 16, 2013*

**algebra.. PLEASE help me!!**

jj
*April 11, 2013*

**physics**

A plastic rod has been bent into a circle of radius R = 8.80 cm. It has a charge Q1 = +4.60 pC uniformly distributed along one-quarter of its circumference and a charge Q2 = -6Q1 uniformly distributed along the rest of the circumference. Take V = 0 at infinity. (a) What is the...
*April 4, 2013*

**NOVACC**

A circular loop of wire (radius = 6.0 cm, resistance = 40 miliamps) is placed in a uniform magnetic field that makes and angle of 30 degrees with the plane of the loop. The magnitude of the field changes with time according to B = 30 sin (20t)mT, where t is measured in s. ...
*April 1, 2013*

**Quantum Physics**

display.cgi?id=1366086762
*March 28, 2013*

**math**

a cube with 2 in sides is placed on a cube with 3 in sides. then a cube with 1 in sides is placed on the 2 in cube. what is the surface area of the three cube tower?
*March 21, 2013*

**Chemistry**

A coffee cup calorimeter contains 25.0 grams water at 23.8 C A 5.00g sample of an unknown metal at an initial temperature of 78.3 C was dropped into the calorimeter. The final temperature of mixture was 46.3 C. Calculate the specific heat of the metal. The specific heat of ...
*March 19, 2013*

**Organic 1**

what orbital overlaps in butene
*March 11, 2013*

**geometry**

7 points are placed in a regular hexagon with side length 20. Let m denote the distance between the two closest points. What is the maximum possible value of m?
*March 11, 2013*

**MATH VERY URRRGENT!!!!!!!!!!!!!**

b
*March 9, 2013*

**math**

order numbers least to greatest3/2,-1.2,0.8,_1/3
*March 8, 2013*

**Chemistry**

Phosphorus pentachloride decomposes according to the chemical equation PCl5(g) <-> PCl3(g)+Cl2(g) Kc=1.80 at 250 degrees Celsius A 0.222 mol sample of PCl5(g) is injected into an empty 3.25 L reaction vessel held at 250 °C. Calculate the concentrations of PCl5(g) and...
*March 3, 2013*

**calc 2**

(a) LEFT For left hand or right hand rule, every extra digit requires 10 times of work. 4 digit needs 2 second. From 4 to 12, it has 8 digits. 2 * 10^(8) seconds / 60 /60 /24 /365 = 6.3 years (b) MID For midpoint rule, every 2 digit requires 10 times of work. 2 * 10^(8/2) /60...
*February 25, 2013*

**math**

a sprinter runs the first 50 meters in 5 seconds. What will be the velocity at the end of the 5 seconds?
*February 24, 2013*

**physics**

A wooden crate weighs 780 lb. What force is needed to start the crate sliding on a wooden floor when the coefficient of starting friction is 0.40?
*February 22, 2013*

**Math?**

Place twelve $1 bill and twelve $10 bill on the template. Than exchange bills so that the same amount of money is on the template using the fewest number of bills. Write the result in expanded form
*February 20, 2013*

**Math?**

How much money is one $100 bill plus $10 bills plus fifteen $1 bill?
*February 20, 2013*

**Math**

Place twelve $10 bill on the place value template then exchange ten of the bill for one $100 bill and write the result in expanded form
*February 20, 2013*

**Math math**

Write the number for 3 hundred plus 5 teens
*February 20, 2013*

**Math**

Write the number for 5 hundred pluse 7 tens pulse 8 ones
*February 20, 2013*

**Math**

How much money is one $100 bill pluse ten $10 bills pluse fifteen $1 bills?
*February 20, 2013*

**Math**

Which digit in 365 shows the number of tens
*February 20, 2013*

**Math**

Place twelve $1 bill and $10 bill on the template. Than exchange bills so that the same amount of money is on the template using the fewest number of bills. Write the result in expanded form
*February 20, 2013*

**Math**

Place twelve $10 bill on the place value template. Then exchange ten of the bill for one $100 bill and write the result in expanded form
*February 20, 2013*

**Math**

Write the number for 3 hundred pluse 5 tens
*February 20, 2013*

**Math**

A 7 4/5 ounce can of cat food costs 38 cents. What is the unit rate (price per ounce) of the cat food?
*February 11, 2013*

**Math page 167 algebra did you hear about...**

How do you start it then I can solve it easily. I'm not cheating.!!!!!
*February 5, 2013*

**Math page 167 algebra did you hear about...**

Hi I need help with this one problem. It's on page 167 algebra with pizzazz. It has to use the addition method. 3x-5y=7 5x-2y=-1
*February 5, 2013*

**orgo**

A sample of naphthalene, which should be pure white, was found to have a grayish color after the usual purification procedure. The melting point was correct, and the melting point range was small. Explain the gray color.
*January 30, 2013*

**physical science**

about 8.2
*January 9, 2013*

**history**

in the later pharses of the civil war general running for president
*December 16, 2012*

**Medical Sociology**

i was also thinking communication and finances (even with insurance it can be difficult to pay for health care)
*December 12, 2012*