# Posts by j

Total # Posts: 1,054

**math**

if someone walks 5km in 21 minutes and then 4 km in 39 minutes then whats his average speed

**Science 6th grade Earth's day and night ANSWERS**

she is soo right i just need to check my anwsers and i got them all correct 8/8!

**economics**

I think that the answer is 2*sqrt(1000)

**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...

**phys**

bob is right, the answer is C

**Educational tech (Please check my answers)**

pacman is correct

**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.

**ss --- check my work!!!**

got 100% thanks lolzypops!

**ss --- pls check my work!!!**

they are right 100%

**chemistry**

What is the molality of a solution composed of 28.4 g of methanol CH3OH and 250 g of water

**trig**

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

**math**

number nine is B

**Science....**

true #2

**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 ...

**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 ...

**science**

You know some people irl name is dick...

**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 18° and Diego pulls with ...

**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 ...

**math**

so are you s.... :)

**Math Homework**

Hello I need help with word problem. Coffee shop sells small and large coffee in one day they sell 508 cups of coffee. IF they sell 3 times as many large cups of coffee as small cups of coffee, How many of each size coffee's does the shop sell in a day?

**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 ...

**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.

**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.

**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.

**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.

**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**

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

**Chemistry**

39

**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...

**physics**

.

**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?