# Posts by j

Total # Posts: 1,017

**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.

**Statistics 1**

10

**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

**Bio**

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

**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.

**Statistics**

57.14%

**Science- DrBob222**

100 % she is right

**science**

no

**AP Macroeconomics**

A. Government bonds can be purchased by anyone with the money to do so, so there are no screening and monitoring costs.

**physics**

90

**physics**

677

**Science- Radioactive Dating**

100% love yalll! avery is wrong it is a b b d trust me!100% i got

**math**

suppose 3 students change their vote from math to science .describe how the frequency table would change

**Physics**

n\

**Science**

they were right 100%

**physics**

km

**Math**

Its a big gigantic X . That's the diagram. Its a vertical angle

**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?

**Algebra HELP!!**

Find the measure of each angle. Angle A is half as large as its complement angle B

**math**

2x-6/3=-2

**math**

24

**Physics**

36 seconds

**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 ...

**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.

**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?

**Math- Urgent**

Thank You so much the link was helpful and I found my answer :-)

**Math- Urgent**

What are the angle relationships formed when a third line intersects two parallel lines?

**Math- Urgent**

Yay!! Thank you so much Mrs. Sue you really helped me!

**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?

**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.

**Math- Urgent**

Solving Equations 3=r/16+4 What does r equal? Please show all work.

**Math- Urgent**

Thank You

**Math- Urgent**

Solving Equations -7+b/15=-6 What does b equal? Please show all work.

**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...

**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...

**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

**Calculus**

the first two are wrong

**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 ...

**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.

**Physics**

anyone for 8

**Steve**

6 + 10 = 16 ***

**Steve**

where does 6 + 10 = 18 come from ?

**Math - Decimals**

0.052

**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.

**math**

june5

**language**

the - definition of glommy is dismal or depressing is it denotative

**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.

**chemistry**

What is the temperature of a 1.02 mol gas sample that occupies 17.3 L at 753 torr?

**Physics**

how did you get 1.68?

**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)

**Physics**

formula for Q#8 part 1 or answer for α=84∘?

**math**

find the missing side of the triangle b=2.1 c=29

**mathematics**

89

**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 ...

**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 ...

**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 ...

**math**

4 o'clock am on Tuesday

**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?

**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

**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

**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

**English**

so what is the correct answer for question 1?

**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...

**Quantum Physics**

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

**Quantum Physics**

5A is not -1/sqrt(N) or any combinations with minus sign.

**Quantum Physics**

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

**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.

**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

**math**

Bleh

**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...

**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. ...

**Quantum Physics**

display.cgi?id=1366086762

**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?

**math**

89

**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 ...

**Organic 1**

what orbital overlaps in butene

**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?

**Astronomy - Physics**

18 720

**math**

order numbers least to greatest3/2,-1.2,0.8,_1/3

**Chemistry**

A A B

**analytical chemistry**

goteem

**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...

**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...

**math**

a sprinter runs the first 50 meters in 5 seconds. What will be the velocity at the end of the 5 seconds?

**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?

**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

**Math?**

How much money is one $100 bill plus $10 bills plus fifteen $1 bill?

**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

**Math math**

Write the number for 3 hundred plus 5 teens

**Math**

Write the number for 5 hundred pluse 7 tens pulse 8 ones

**Math**

How much money is one $100 bill pluse ten $10 bills pluse fifteen $1 bills?

**Math**

Which digit in 365 shows the number of tens

**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

**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

**Math**

Write the number for 3 hundred pluse 5 tens

**Algebra**

corect

**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?

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

How do you start it then I can solve it easily. I'm not cheating.!!!!!

**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

**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.