Thursday

September 18, 2014

September 18, 2014

Total # Posts: 2,565

**Physics**

A diver springs upward from a board that is 4.10 m above the water. At the instant she contacts the water her speed is 11.9 m/s and her body makes an angle of 79.7 ° with respect to the horizontal surface of the water. Determine her initial velocity, both (a) magnitude and...
*January 31, 2012*

**math**

17*5=85 17+5=22
*January 31, 2012*

**physics**

I found the answer to part a, but I don't know how to solve part b. Part is 26.1m/s.
*January 31, 2012*

**physics**

A space vehicle is coasting at a constant velocity of 22.5 m/s in the +y direction relative to a space station. The pilot of the vehicle fires a RCS (reaction control system) thruster, which causes it to accelerate at 0.223 m/s2 in the +x direction. After 57.5 s, the pilot ...
*January 31, 2012*

**math**

math : write an equation that uses 18-?and 10+2.explain how to decide which numbers would make it true.
*January 30, 2012*

**Math**

Red and blue beads are being strung to make a bracelet. How many different bracelets can be formed it each bracelet uses exactly 5 beads?
*January 29, 2012*

**geometry**

Simplify the ratio: 48 ft. -------- 36 ft.
*January 27, 2012*

**World History**

28.Olympe de Gouges
*January 23, 2012*

**physics**

In reaching her destination, a backpacker walks with an average velocity of 1.20 m/s, due west. This average velocity results, because she hikes for 5.94 km with an average velocity of 3.28 m/s due west, turns around, and hikes with an average velocity of 0.778 m/s due east. ...
*January 22, 2012*

**Physics**

Two iron spheres each have a volume of 10 cm^3 and a mass of 78g. How many electrons must be placed on each sphere so that the electrostatic force of repulsion between them just balances the force of gravitational attraction? Assume the distance between the spheres is more ...
*January 21, 2012*

**science/anatomy**

1. pharynx 2. Epiglottis
*January 19, 2012*

**math**

I had the same question
*January 19, 2012*

**geometry**

the transamerica pyramid building shown in the photograph has four faces shaped like isosceles triangles. The measure of a base angle of one of these triangles is about 85. What is the approximate measure of the vertex angle of the triangle?
*January 17, 2012*

**Chemistry**

You can also use d=PM/RT. Density is mass/volume. Plug it in and solve for M.
*January 16, 2012*

**Science**

I put Individuals of the same kind living in the same environment make up a population. All the populations of organisma living together in an environment make up a community. Is that correct?
*January 12, 2012*

**Science**

In my book it says Individuals of the same kind living in the same evnironment make up a population. All the grasshoppers in a field are the grasshopper population. All the populations of organisms living together in an environment make up a community What is the relationship ...
*January 12, 2012*

**Science**

It's not C, right?
*January 12, 2012*

**Science**

Nonliving things affect the organisms living in an ecosystem include weather,landforms,and?- A. habitat B. niche C. soil D. population I think its B
*January 12, 2012*

**Science**

I put Individuals of the same kind living in the same environment make up a population. All the populations of organisma living together in an environment make up a community. Is that correct?
*January 12, 2012*

**Science**

In my book it says Individuals of the same kind living in the same evnironment make up a population. All the grasshoppers in a field are the grasshopper population. All the populations of organisms living together in an environment make up a community What is the relationship ...
*January 12, 2012*

**physics**

When an airplane is in level flight, its weight is balanced by a verticallift, which is a force exerted by the air. How large is the lift on an airplane in such flight if the mass ofthe airplane is 1.20 x 10 cubed kg.?
*January 12, 2012*

**Science**

The journey of a cheese sandwich - how do you explain how cells use food using the big idea of partilces?????!!!!! HELP!!!! i hate these stupid assessments!!!!
*January 11, 2012*

**physics**

A 0.18 kg ball is placed in a shallow wedge with an opening angle of 110° For each contact point between the wedge and the ball, determine the force exerted on the ball. Assume the system is frictionless.
*January 9, 2012*

**History**

Is there any other similarities?
*January 9, 2012*

**History**

What do all of these former Presidents have in common? Abraham Lincoln,John F. Kennedy,James Garfield,and Franklin Roosevelt
*January 9, 2012*

**Reading**

I cant find any other details to replace number 5.
*January 5, 2012*

**Reading**

I meant to put on number 2 minerals not materials. Would that still be wrong?
*January 5, 2012*

**Reading**

Is this correct?
*January 5, 2012*

**Reading**

When you're scribbling a note with a pencil, do you ever wonder what this handy tool is made from? To get right to the point, a pencil is made of a number of materials. The inside is made of graphite that is reinforced with clay. Its wooden outside comes from cedar trees. ...
*January 5, 2012*

**Reading**

Icebergs can be slippery slopes for ships at sea. An iceberg can be dangerous to ships because more than 3/4 of it is under the water. Most of it isnt visible. Icebergs are found in the cold seas near the North and South Poles. The wind and currents move them through the water...
*January 5, 2012*

**physics**

A 80 kg man weighs 784 N on the Earth's surface. How far above the surface of the Earth would he have to go to "lose" 15% of his body weight?
*December 19, 2011*

**science**

laboratory connects a 16§Ù resistor, 23§Ù resistor, and a 34§Ù resistor in series and then comes the arrangement to a 36V dc source. How much current is in the circuit?
*December 17, 2011*

**science**

what are the forces on two charges of +0.44c and +2.4c, if they are separated bu=y a distance of 3.16cm? repel or attract each other?
*December 16, 2011*

**Chemistry**

Oops the charges in the equation got messed up so instead: MnO4- + 5Fe2+ + 8H+ -> 5Fe3+ + 4H2O
*December 15, 2011*

**Chemistry**

I had tremendous problems with this question as well, and since I now have the answer, I'll spread the love. First, you figure out how many moles of KMnO4 is used for both titrations using the equation ---- M=(mol)/(L) ---- (M=Molarity) Doing this, you would get the first ...
*December 15, 2011*

**math**

That question can't really be answered unless we can see the string
*December 13, 2011*

**5th grade math**

seven trillion six hundred fifty four billion three hundred twenty one million one hundred fifty eight thousand nine hundred six
*December 12, 2011*

**5th grade math**

Figure out what each place value the numbers are in
*December 12, 2011*

**biology**

A dominant gene V in humans causes certain areas of the skin to become depigmented, a condition called "vitiligo." Albinism is the complete lack of pigment production and is produced by the recessive genotype aa. The albino locus is epistatic to the vitiligo locus. ...
*December 12, 2011*

**statistics**

for a certain psychiatric evaluation z scores above 2.18 and below -2.33 are considered abnormal. what is the probability that a person evaluated by this will be considered normal?
*December 11, 2011*

**science**

place in order of increaseing nonmettalic character: Se, Po,and O. Can you explain how to do this?
*December 11, 2011*

**SCIENCE**

ORDER OF INCREASING ATOMIC SIZE: Cs, Li, and Rb
*December 11, 2011*

**calculus II**

Using integration by substitution. find the exact value of integral from [0,9/16] sqrt(1 - sqrt(x))/(sqrt(x))
*December 10, 2011*

**Top Schools**

Do what you want. Cause high school gets you into a college you want It depends on what you want to be when you grow up
*December 9, 2011*

**physics**

Calculate the difference between the magnitude of the gravitational force and the magnitude of the normal force exerted on a 100 kg object at the equator. Which of the two forces is equal in magnitude to the weight of the object?
*December 5, 2011*

**precalc**

Determine whether the sequence is geometric or arithmetic. Then give the general formula for the nth term of the sequence. 6.1, 6.9, 7.7, 8.5, 9.3,... I think it is Geometric, but i don't know how to find the formula
*December 5, 2011*

**math**

Is f(x)=4x/x-1 in factored form
*December 4, 2011*

**precalc**

Use Sigma Notation to write the sum [10-(1/10)^2]+[10-(2/10)^2]+[10-(3/10)^2]+[10-(4/10)^2]
*December 4, 2011*

**3rd grade math**

How can you use mental math to multiply 800 x 5?
*November 29, 2011*

**3rd grade math**

Marcia said that if she estimates 73 x7, the product will be less than the exact answer. Is she correct? Explain.
*November 29, 2011*

**statistics**

4. Assume you are just planning this survey and want to know how many individuals you have to randomly select to be part of the sample. Assume that the purpose of the study is to calculate a 95% confidence interval for proportion of the adult population who favor lowering the ...
*November 29, 2011*

**Economics**

D. (i), (ii), (iii), and (iv)
*November 29, 2011*

**precalc/trig**

Find the trigonometric form of the number. (Round any angles to two decimal places.) −8 − i
*November 29, 2011*

**MATH**

Y=30X+.25
*November 28, 2011*

**art**

hi i am making a comic book for my teacher for a punishment for me and she saaid it has to be funny and i cant think of any thing please help me think of something. thank you
*November 26, 2011*

**art**

i need help finding a website showing me some easy to draw abstracks pictures
*November 26, 2011*

**physics**

A 6.0 kg mass moves along an inclined plane that makes an angle of 36 degrees with the horizontal. The mass is connected by a cable to a second mass of 10.0 kg, which is suspended over a frictionless, massless, pulley and is free to move. The second mass of 10.0 kg falls at a ...
*November 22, 2011*

**calculus**

Determine where the given function is concave up or where it is concave down: f(x)=9x/x^2+49
*November 21, 2011*

**HIstory**

How have the lingering influences of the New Left and the cultural radicalism of the 1960s affected both liberal and conservative politics?
*November 20, 2011*

**american history**

its d the breakup of the former state of yugoslavia
*November 19, 2011*

**physics**

When a 19.9 kg wheel with an angular speed of 3.10 rad/s is disconnected from a motor, a 0.124 N · m frictional torque slows the wheel to a stop. If the wheel has radius of 0.71 m, how long will it take for the wheel to come to rest after being disconnected from the motor?
*November 18, 2011*

**physics**

A wheel 80.0 cm in diameter accelerates uniformly from 215 rpm to 360 rpm. If in this process a point on the edge of this wheel have traveled 118 m, how long does this process take?
*November 18, 2011*

**math**

jose said all of the multiples of 8 are also multiples of 2. jamila said that all of the multiples of 8 are also multiples of 4. who is correct. Explain
*November 16, 2011*

**ratio**

24 people in 6 cars, find the unit rate?
*November 15, 2011*

**Physics**

water flows smoothly from the left-hand pipe section (radius 2.00R), through the middle section (radius R), and into the right-hand section (radius 3.00R). The speed of the water in the middle section is 0.460 m/s. What is the net work done on 0.430 m3 of the water as it moves...
*November 14, 2011*

**Physics**

Flooded Basement Water is pumped steadily out of a flooded basement at a speed of 5.5 m/s through a uniform hose of radius 0.8 cm. The hose passes out through a window 3.1 m above the waterline. What is the power of the pump?
*November 14, 2011*

**music**

i need to do make a presentation on my favourite song how do i do it. my favourite song is moves like jagger
*November 12, 2011*

**Chemistry**

Strong base is dissolved in 675 ml of 0.200 m weak acid (ka=3.25x10^-5) to make a buffer with a ph of 3.95. Assume that the volume remains constant when the base is added. HA + OH ---> H2O + A^- calculate the pka value of the acid and determine the number of moles of acid ...
*November 9, 2011*

**Chemistry**

What would be the first step of the mechanism in the hydrolysis of SiCl4? I know that SiO2 is formed, but Im confused as to how this would occur.
*November 9, 2011*

**Adv. English 9**

for the story Liberty by Julia Alvarez..
*November 6, 2011*

**Adv. English 9**

If someone could help me answer any one of these that would be great. :) 1.Name and explain the information provided in the exposition of the story. Then, name the point at which the climax takes place and explain why it is the climax. Finally, tell what is provided in the ...
*November 6, 2011*

**Physics **

R1 is the radius from the centre of the cylinder's circle, and the R3 is the distance from R1 to another specific point also near the centre of the cylinder's circle.
*November 6, 2011*

**Physics **

A uniform 2.0 kg cylinder can rotate about an axis through its center at O. The forces applied are: F1 = 5.70 N, F2 = 3.90 N, F3 = 4.30 N, and F4 = 7.00 N. Also, R1 = 12.8 cm and R3 = 4.50 cm. Find the angular acceleration of the cylinder.
*November 6, 2011*

**probability**

if for two random variables X and Y,is Y=-X then ñ=1
*November 4, 2011*

**probability**

if for two random variables X and Y,is Y=-X then ñ=1
*November 3, 2011*

**probability**

One container contains 6 red and 4 white balls, while a second container contains 7 red and 3 white balls. A ball is chosen at random from the first container and placed in the second. Then a ball is chosen at random from the second container and placed in first. What is the ...
*November 3, 2011*

**Caculus**

oh sorry, it would be y = 500/1+75e^-.625x
*November 2, 2011*

**Caculus**

y = 500/1+75e^-.625 x = egg mass y = number of tree (thousand) The function is show the forest defoliation1. Find the percent of forest defoliation if the egg mass are 100? (Using derivative) Thank you
*November 2, 2011*

**Org.chem. I**

Probably because of Chiral recognition, there are more chiral receptor for (+)-carvone in rats. This is just my guess.
*October 31, 2011*

**math**

a man buys an item from delhi 10% cheaper than that at merath, incurs loss of rs. 160, but on selling the item profits rs.240. calculate the profit percentage.
*October 30, 2011*

**Physics**

You throw a ball with a speed of 30 m/s at an angle of 40.0° above the horizontal directly toward a wall. The wall is 22.0 m from the release point of the ball. (a) How long does the ball take to reach the wall? (b) How far above the release point does the ball hit the ...
*October 30, 2011*

**Physics**

SIMPLIFY.
*October 28, 2011*

**Physics**

An arrow is shot at 29.0° above the horizontal. Its initial speed is 54 m/s and it hits the target. (a) What is the maximum height the arrow will attain? (b) The target is at the height from which the arrow was shot. How far away is it?
*October 28, 2011*

**Physics**

An arrow is shot at 29.0° above the horizontal. Its initial speed is 54 m/s and it hits the target. (a) What is the maximum height the arrow will attain? (b) The target is at the height from which the arrow was shot. How far away is it?
*October 28, 2011*

**physics**

F = ma 80 = 50(a) 80/50 1.6 m/s^2
*October 28, 2011*

**math**

juan says,"When you put together unequal groups, you can only add." is he correct? Explain
*October 27, 2011*

**statistics**

We’re writing a test case that samples a “random” black box. Given n numbers, how many times would we need to sample the black box to have n unique responses with a 99.9% confidence? Eg, if we were rolling a six-sided die, how many times would we need to roll it...
*October 27, 2011*

**physics**

A 3.8 kg toy car at rest on a horizontal surface is accelerated by a spring to 5.4 m/s in a distance of 5.9 cm. What is the spring constant of the spring?
*October 27, 2011*

**Physics - Energy**

Two comets, each of mass 6500 kg and traveling 88 m/s in opposite directions, collide head-on and come to rest. How much energy is produced in this collision? Thank you!
*October 26, 2011*

**bio**

what will happen to a red blood cell place in a solution of 99.3% water and 0.7% salt?
*October 26, 2011*

**physics**

How much work in joules must be done to stop a 5000 kg car traveling at 120 km/hr?
*October 25, 2011*

**Math**

What is the height of a trapezoid with an area of 60 square meters and bases of 8m and 12 meters?
*October 25, 2011*

**geometry**

triangular pyramid with base vertices C, A, E and B, D, and F How many planes are shown in the figure?
*October 24, 2011*

**algebra**

-2m - 18n + 17
*October 23, 2011*

**History**

By 1826 was the country more Hamiltonian or more Jeffersonian?
*October 23, 2011*

**Chemistry**

What type of lattice would FrCl have? ...im not sure about this, would a lattice form? if so, how to determine lattice type?
*October 21, 2011*

**science**

A 80.0 kg girl lowers herself to the ground from a height of 11.6 m by holding onto a rope running over a pulley to a 56.0 kg sandbag. What is the magnitude of the acceleration of the girl?
*October 19, 2011*

**4th grade math**

What are 2 other names for BN? What is another name for SL?
*October 18, 2011*

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