Monday
July 28, 2014

Posts by J


Total # Posts: 723

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

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 reve...

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 spe...

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 receivi...

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

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

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. Dete...

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?

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 ate...

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?

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

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

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.

history
in the later pharses of the civil war general running for president

Medical Sociology
i was also thinking communication and finances (even with insurance it can be difficult to pay for health care)

Medical Sociology
I was thinking people who live in inner cities are unable to get transportation or are unable to afford care even with insurance

Medical Sociology
Obamacare will enable 32 million more Americans to have health insurance. Despite this coverage, medical sociologists know that there are other barriers besides health insurance that make it difficult for patients to seek medical care. Describe 3 such barriers to seeking care....

math
f(x)=165*x what is the domain plz i need help

sat essay
We'll no a speech can't just change some one so I think not

science
speed=frequencyxwavelengthc=f please explain

math
what number is 33% of 500?

math
the reciprocal of the expression 2/x + 3/1

math
the reciprocal of the expression 2/x + 3/1

Math
578 of 850 employees work directly with guests what percentage of employees work directly with guests

social studies
What physical feature in Africa is located in the northeast and seperates it from Asia?

Math (Algebra 1)
24.333

Math
Central Middle School sold 50 tickets for one night of the school play. Student tickets sold for $2 each and adult tickets sold for $3 each. They took in $135. How many of each type of ticket did they sell?

Physic
A 10 kg particle moving along the x-axis experiences the force shown in figure. The particle goes from v=1.0m/s at x=0 and v=5.0 m/s at x=2. What is the f max?

science
Thank you Ms.Sue you a super duper smart and you are the best! :) :D

science
Any websties that say if a snowflake is a crystal? |

science
Is a snowflake a crystal? Can you show me a website were i can read about what a crystal is?

science
Is a mineral a crystal?

voltage drop
12v r1=10 r2=15 r3=2 r3=18 how would one solve this

CALC 251
Suppose that f(x)= (e^x)/(x^2+16. Find f'(0).

CALC 251
Let f(x)= [5x^(1/4)]*(x^3-8) Evaluate at f'(x).

math
A water trough is 4 m long and its cross-section is an isosceles trapezoid which is 210 cm wide at the bottom and 280 cm wide at the top, and the height is 70 cm. The trough is not full. Give an expression for V, the volume of water in the trough in cm^3, when the depth of the...

Calculus 251
The slope of the tangent line to the curve y= 3x^3 at the point (-1,-3) is:? The equation of this tangent line can be written in the form y=mx+b where m is:? and where b is:?

ENGLISH
You can't expect people to do your homework for you. The whole idea is to help each other. I can check your answers but that's hard to do when you dont post any....

finance
You have been given the following information on a project: It has a 3-year lifetime The initial investment in the project will be $28 million, and the investment will be depreciated straight line, down to a salvage value of $6 million at the end of the fourth year. The revenu...

Physics
A truck is stopped at a stoplight. When the light turns green, the truck accelerates at 2.0 m/s2. At the same instant, a car passes the truck going 13 m/s. Where and when does the truck catch up with the car? _________m (from the intersection)

math
plz help

Elena plz help
help me plz

math
4. Point E is located at (–2, 2) and point F is located at (4, –6). What is the distance between points E and F? a. square root of 52 b. square root of 28 c. 10 d. square root of 20 5. In which quadrant is the point (x, y) located if x is negative and y is positive? ...

math
c d a

algebra
From a point on a straight road. Pablo and Kelsey ride bicycles in the same direction. Pablo rides 12mph and Kelsey ride 14mph. How many hours will they be 9 miles apart

History
What were the economic and social condition of America in the early 1900s (1900-1940)?

CHEMISTRY
HOW MANY GRAMS OF CALCIUM IS 3.08 MOL OF Ca?

CHEMISTRY
HOW MANY MOLES OF CALCIUM IS 139g OF Ca?

CHEMISTRY
HOW MANY ATOMS 0.151 MOL OF LITHIUM?

CHEMISTRY
HOW MANY MOLES OF LITHIUM IS 2.69XE9

geometry
Given x is the midpoint of yz. given xy =6x+4 and yz=40, fing the value of x

Geometry
Given x is the midpoint of yz. given xy =6x+4 and yz=40, fing the value of x

health
me to!! haha dey don't know

chemistry
If after precipitation of the Group I cations as chlorides by the reaction with HCl, nearly all of the precipitate dissolves in the hot water, what ion is most probably present and which ions are most probably absent?

physics
the motion of a particle along a straight line is described by the function x=(2t-3)^2 where x is in metres and t is in seconds. A)find the position ,veocity and acceleration at t=2 sec. B) find the velocity of the particle at origin.

Physics
Find the forces exerted by the two supports of a 4.0m, 50-kg diving board when a 60-kg woman stands at its end. The two supports are 0.8m apart. This time consider the mass of the diving board.

physics
A car starts from rest and travels for 6.3 s with a uniform acceleration of 2.3 m/s2. The driver then applies the brakes, causing a uniform acceleration of −1.9 m/s2. If the brakes are applied for 2.6 s, how fast is the car going at the end of the braking period?

physics
.0

Calculus
Find the shortest distance between the two skew lines L1 and L2 with equations r = [1,2,2] + s [4,3,2] and r = [1,0,-3] + t [4,-6,-1]

Calculus
Find the shortest distance from a point P(2,-1,2) to a line L r= [-1,0,7] + t [4,1,-2].

Calculus
thanks reiny!

Calculus
7. Where does the line r = (1, 2, -5) + t (2, -3, 1) meet the plane 2x + 5y - 3z = 6?

Calculus
6. Find out if the line r = (1, 3, 8) + t (-2, 5, 7) is parallel to the plane 3x + 4y - 2z = 1

Calculus
5. Determine an equation for the plane that is exactly between the points A(-1, 2, 4) and B(3, 1, -4).

Calculus
thank you reiny, thats the answer i first got but i wasn't sure if it was right, thanks

Calculus
4. Write a vector equation of the line through the point (5, -2, 3) and parallel to the vector v=[4, -3, 1]

Calculus Grade 12 University
for the #4 i got r = (5, -2, 3) + t(4, -3, 1) --- can you please help me on 5, 6, 7. instead since i got 4. thanks steve

Calculus Grade 12 University
thanks steve. do you know how to do these ones? :( 4. Write a vector equation of the line through the point (5, -2, 3) and parallel to the vector v=[4, -3, 1] 5. Determine an equation for the plane that is exactly between the points A(-1, 2, 4) and B(3, 1, -4). 6. Find out if ...

Calculus Grade 12 University
8. Find the vector equation of the line in which the 2 planes 2x - 5y + 3z = 12 and 3x + 4y - 3z = 6 meet.

Calculus grade 12
7. Where does the line r = (1, 2, -5) + t (2, -3, 1) meet the plane 2x + 5y - 3z = 6?

Calculus
6. Find out if the line r = (1, 3, 8) + t (-2, 5, 7) is parallel to the plane 3x + 4y - 2z = 1

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