Thursday

April 24, 2014

April 24, 2014

Total # Posts: 103

**Math**

A tree is 18 feet tall and casts a shadow that is 22 feet long. How fat is it from the end of the shadow to the top of the tree

**physics**

In the Millikan experiemnt, what error might result if only a few oil drops were used, or if all the oil drops contained an even number of charges.

**math**

The surface area of this rectangular prism is 256 square millimeters. What is the value of l? the given numbers are h=4 w=8

**physics**

Two electrons start at rest with a seperation of 5e-12 metres. Once released, the electrons accerelate away from each other. Calculate the speed of each electron when they are a very large distance apart.

**science- Physics**

Two electrons start at rest with a seperation of 5e-12 metres. Once released, the electrons accerelate away from each other. Calculate the speed of each electron when they are a very large distance apart.

**english**

I have to classify this sentence: Wow!(I) I(sn)/saw(v) a(a) falling(adj) meteor(do) clearly(adv) during(p) the(a) night(op). Is this correct?

**physics**

A 2000 kg is released from a height 20m, and hits a 700kg car at the bottom of the swing. The car is sent horizontally 30, before coming to a stop, and the ball is going 12m/s immediately after they hit. What force of friction is acting between the car and the ground?

**physics Momentum and impulse**

You want to close an open door by throwing either a 400g lump of clay or a 400g rubber ball at it. You throw at the same speed, but the clay sticks to the door and the ball bounces off it. Which works bette?

**Math- Vectors**

Whta is the equation that has the same x-intercepts as L1:[x,y,z]= [3,5,-1] + t[4,-10,2] and is perpendicular to L2:[x,y,z]= [5,8,-2] + s[3,7,1]

**Vectors**

ok thx

**Vectors**

I think we have to assume friction is not important and the object is on earth.

**Vectors **

An object on a ramp is being held in place by a rope attached to the top of the ramp. If the tension in the rope is 215 N, what is the mass of the object.

**Advance Functions**

The population of a small town is modeled by the function p(t)=20(4t+3)/2t+5, where P(t) is the population, in thousands, and t is time, in years, since the start of 1990. The town will need its own transit system if the population exceeds 50,000. Will the town's populatio...

**Vectors **

Consider the lines L1: [x,y,z] = [4,-2,k] + s[1,1-3] +t[2,3,1] Determine a value of k that is 10 units away from the plane with the equation 10x-7y+Z-28=0

**math**

Find the equation of the plane equidistant from the points (1,8,3) and (4,10,7)

**math **

Find the equation of the plane equidistant from the points (1,8,3) and 94,10,7)

**Physics (fix)**

In a string and pulley problem, will friction increase or decrease the tension.can you please explain if you can?

**physics-**

Thx for Anne for this answer. Just post this here if someone wonders to here.

**physics-**

Adding friction to a pulley problem, regardless of if a mass in on an incline or not, will almost always increase the tension in an atwood machine- type pulley problem. This is because friction will always oppose motion, so there will be more forces working against the force o...

**physics- **

In a string and pulley problem, will friction increase or decrease the tension.can you please explain if you can?

**science**

1. B 2. C 3. C 4. A 5. D These are PROBABLY the right answers. I am 80% sure these are the right answers.

**science**

If you do have the same questions as me #3 would be C. Because heterozygous cow crossed with a homozygous cow the Punnett square would be 1 B at the top left, 1 b at the top right and the left would just be b and b.

**Physics**

A student throws a baseball at a large gong 45 m away and hears the sound of the gong 1.35258 s later. The speed of sound in air is 330 m/s.What was the average speed of the base- ball on its way to the gong? (For simplicity, assume its trajectory to be a straight line.) Answe...

**Physic**

A 61-kg skier, coasting down a hill that is an angle of 23 to the horizontal, experiences a force of kinetic friction of magnitude 72N. The skier's speed is 3.5m/s near the top of the slope. Determine the speed after the skier has travelled 62m downhill. Air resistance is ...

**Algebra 2**

Solve for x under the assumption that x > 0. Enter your answer in interval notation using grouping symbols. x - (10/x) < 9 I need someone to show me how to work through this type of problem, I don't understand it.

**Algebra 2**

Find the equation of the asymptotes for the hyperbola defined by the equation: ((y + 4)^2 / 36) - ((x - 3)^2 / 25) = 1

**Algebra 2**

Solve the equation |2x − 5| £ 9

**Algebra 2**

A 14 gram sample of a substance that's used to preserve fruit and vegetables has a k-value of 0.1092. Find the substance's half-life, in days. Round your answer to the nearest tenth.

**science- physic please help**

Well I did a Pendulum lab. The length of my pendulum on a string was 95 centimeters and it took 19.15 seconds to complete the 10 cycles. Please help me to find the frequency.

**math**

Two angles between 0 degrees and 360 degrees have a tangent undefined. What are the angles? Why is the tangent undefined for each of those?

**math **

How do I do this? Without a calculator, determine two angles between 0 degrees and 360 degrees that have a cosine of negative square root 3 over 2.

**Math**

Solve the proportion. Where necessary, round to the nearest hundredth. 8 over 2 = x+3 over 4

**math quiz tomorrow **

I am having problem graphing with these two equations 2(3^x)-3 and –3(3^–x)

**math**

a soccer ball is kicked from the ground. after travelling horizontal distance of 35m,it just pass over a 1.5m tall fence before hitting the ground 38m from where it was kicked. Determine the equationi of a quadratic function that can be used to model the parabolic path of the ...

**ratio and rate**

hummingbird has a wing beat of 200 beats per second. a bout how many wing beats would it have in 3 minutes

**math**

A recipe for 24 cookies calls for 6 tablespoons of sugar. If you make 36 cookies and use 10 tablespoons, will the cookies taste the same? Explain

**math**

A package of spaghetti weighs 266 grams. How many ounces does the package weigh? 1 oz = 28 g

**Physics**

A rotating cylinder 7.95 kilometers in radius is designed to be used as a space colony. With what period must it rotate so the residents on it feel as heavy as they would on Earth?

**social studies**

in the mid-1990s,investers backed many ____ in hopes of making a huge profit.

**math**

What is 7/8 divided by 3/9?

**Experimental Chemistry**

(Experiments in synthetic chemistry) For heating under reflux, must the solvent level in the round bottomed flask be above the oil level (in the hot oil bath)? Why? Thanks.

**sCIENCE PLZZZZZZZZ HELP**

B a D D i got a 100 percent i took the same test

**math**

the teacher told each student to bring in 3/8 yard of string. they all brought in a total of 13 yards. how many students will be in the class

**science**

True or false, at 25 degrees celsius H+ ion concentration in pure water is 7 x 10^ -7 mole per liter?

**Geometry**

A circular flower bed is sectioned off. The arc intercepted by the 120 degree central angle is to be bordered with marigolds. The garden has a diameter of 63 inches. Circumference = Pi * diameter, Pi = 22/7. If you plant the marigolds about eight inches apart what is the least...

**social studies**

how to find the mummification process.

**Grade 6 math **

I have an input 25 and output of 15 the next set is input of 30 output of 18 how do I figure out the rule

**Mediation**

How does a human services worker integrate the use of mediation, or third party neutrality, when he or she also serves as an advocate for the client and is an employee of the agency

**math**

which is greater 1.8 or 1.08

**math 5th grade**

I need to know how to solve 6- 3/4= Not sure how to get the answer??

**Accounting III**

What arguments can be advanced in favor of treating fixed manufacturing overhead costs as product costs? What arguments can be advanced in favor of treating fixed manufacturing overhead costs as period costs? Which arguments do you find to be the most valid? Explain.

**math**

Thanks.

**math**

Dana buys a piece of carpet that measures 20 square yards. Will she be able to completely cover a rectangular floor that measures 12 ft 6 in. by 16 ft 6 in.?

**pre algebra**

1/2 divided by 2/3=

**American History**

Cant figure this one out... How did Ferdinand and Isabella’s political strategies and religious beliefs shape the encounter between early Spanish explorers and the indigenous peoples of the Americas?

**History**

thanks

**History**

What is the significance of providing an official charter, such as was given to Sir Walter Raleigh by Queen Elizabeth?

**please please help**

Nico is saving money for his college education. He invest some money at 8%, and $1300 less than that amount at 5%. the investments produced a total of $234 intrest in 1 yr.How much did he invest at each rate?

**Math Help Please**

Can somebody help me i still dont get how to do this?

**Math Help Please**

would it be 23 or 2300

**Math Help Please**

Nico is saving money for his college education. He invest some money at 8%, and $1300 less than that amount at 5%. the investments produced a total of $234 intrest in 1 yr.How much did he invest at each rate?

**MATH**

3040...okay thanks

**MATH**

I got x=330 what do i do from there. How do i get the speed of each plane from there?

**Math**

6<1-7m<13

**chemistry**

-Suppose you carry out TLC separation of acetaminophen and ibuprofen on silica ggel using a nonpolaar developing solvent. which should have a higher Rf? -Assuming that the drug components whose spots you identified dissolved completely when you stirred the tablet with 1:1 etha...

**Algebra 2**

Drwls- Unfortunately your hints do not help as I have no clue how to even start the problem. Please do the problem and then maybe I will understand.

**Algebra 2**

factor each polynomial 36p^2-49q^2

**math**

subtract 1 from 36. You will get 35, so 7x=35 divide 7x=35 by 7 to get x by itself so your new equation will be x=35/7. So x =5

**math**

carlos needs to chain his dog, he attaches a 13-meter chain to the corner of a dog house that measures 9m by 5m. How much area does the dog have to run around? Round to the nearest tenth.

**ALGEBRA 2 URGENT! PLEASE HELP!**

Simplify 8(2^x-1)=64

**ALGEBRA 2 URGENT! PLEASE HELP!**

Simplify (10x^2-6x-x^3)+(9x+x^3+5x^2)

**Algebra 2 Urgent! please Help!**

simplfy (10x^2-6x-x^3)+(9x+x^3+5x^2) please show all work and steps i have been working on this problem for 10 minutes and still cant figure out how to do it.

**Algebra 2 URGENT PLEASE HELP**

find an equation of the linear function f using the given information. please show all steps and work f(-1)=1, f(1)= -2

**math**

find an equation of the linear function f using the given information. please show all steps and work f(-1)=1, f(1)=-2

**Physics**

A "Bus" bar is in the form of a slab of copper 2meters long, 1cm wide, and 10 cm thick. a) What is the resistance of the bar at 0 degrees celcius? b) What potential difference is needed to push 5000 amps through the bar?

**algebra 2**

Solve the triangle triangle EFG <G=90 degrees e=3 f=8

**algebra 2**

solve the triangle triangle BCD <D=90 degrees <B=21 degrees b=4 show all work and steps!

**Grammar**

Thank you!

**Grammar**

So, the 1st answer is pit? The 2nd answer is lick? trick?

**Grammar**

Analogies Pot is to top as tip is to? Ring is to sting as brick is to?

**Chemistry**

How do you calculate the amount of a radioactive substance remaining after an integral number of half-lifes have passed?

**math**

184/8=

**chemical equations**

Is the answer 51g H2O for my question what mass of water is needed to react with 32.9g LI3N?

**chemical equations**

Is the answer 51 g H2O?

**chemical equations**

Lithium nitride reacts with water to form ammonia and aqueous lithium hydroxide. Li3N(s) + 3H2O(l) > NH3(g) + 3LiOH(aq) What mass of water is needed to react with 32.9 g Li3N?

**chemical equations**

5C(s) + 2SO2(g) > CS2(l) + 4CO(g) How many moles of carbon monoxide form at the same time that 0.246 mol CS2 forms?

**Stoichiometry**

if you have 66.6g NH3, how many grams of F2 are required for a complete reaction? please show work!!!!!

**2nd grade math**

in a lesson about reading strategies and making predictions in math i was asked this... celia has a new kitten. it is 5 inches tall. will it be 5,12, or 24 inches tall when it is grown up? how do i fgure this out?

**science**

i need help

**physics**

Two canoeists in identical canoes exert the same effort paddling and hence maintain the same speed relative to the water. One paddles directly upstream (and moves upstream), whereas the other paddles directly downstream. With downstream as the positive direction, an observer o...

**SPANISH 1**

1)Que tiempo hace? How is the weather? (2)Que hora es? What time is it? (3)A donde (where) camina Felipe? Where does Felipe walk? (4) Felipe toca a la puerta de Maria? Felipe knocks at Maria's door. (5)Felipe le da a Maria una flor? Felipe gives Maria a flower? 6)Que hace(...

**college-Physics**

Two canoeists in identical canoes exert the same effort paddling and hence maintain the same speed relative to the water. One paddles directly upstream (and moves upstream), whereas the other paddles directly downstream. With downstream as the positive direction, an observer o...

**Physics**

Two canoeists in identical canoes exert the same effort paddling and hence maintain the same speed relative to the water. One paddles directly upstream (and moves upstream), whereas the other paddles directly downstream. With downstream as the positive direction, an observer o...

**Language Arts**

what is another word for understand,crouched and tremble i. fear,enormous,peculiarity,scormful and ridculing,comfort,move back,powerless, and fit to be eaten.

**math- Patterns... i tried it many times..HELP!!!!**

I think it is 14,because I think you have to subtract 34-20=14

**7th grade**

what is another word for understand

**Science**

I mean what

**Math**

ty Sir

**Math**

(ã5 + 5ã6)(ã5 - 5ã6) is the answer -145 ???

**chemistry**

Among water, ethanol and isopropanol, which has the largest molar mass.