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Posts by katie

Total # Posts: 2,141

physics
A hydrogen atom has a diameter of about 10.1 nm. Express this diameter in meters, millimeters, and micrometers.

Finite---- PLEASE HELP
A biologist finds that 32% of fruit flies have short wings and 27% have eye defects. Assuming these two events are independent, what is the probability that a randomly selected fruit fly has neither short wings nor eye defects?

U.S History
Why did slavery continue after the Revolution?

Algebra
sorry, having a brain malfunction but which is a function: "x is a student y" "x is the biological daughter of mother y"

living enviornment
what is the average length of a single cell in micrometers? a)2,000um b)100um 3)10um 4)200um

math
The rate is: type # of vehicles car 6 truck 10 SUV 14 Mini Van 15

physics
The Hubble Space Telescope orbits Earth 621 km above Earth's surface. What is the period of the telescope's orbit? Give answer with 5 significant figures.

english
use words 9-15 in a creative story. can you please help me!! besiege ephemeral altruism carrion erotic amorphous opulent I KNOW WHAT THEY MEAN I JUST NEED HELP FIGURING OUT HOW TO USE THEM IN A STORY

algebra
3x^3+x^2-12x-4=0

Physics
A crate with a mass of 50 kg has a coefficient of static friction with the floor of 0.8 and a coefficient of kinetic friction of 0.25. If it is pushed with a force of 425 N, how long will it take to move it across a 65 meter horizontal floor?

Check my Essay?
np

Check my Essay?
i like it

science
what are u learning about ?

science
thanks again

science
pleasee sumonee answerr this quick!!!!!!!!!! asap

science
why is scientific inquiry a process with many paths, not a rigid sequence of steps?

science
thanks

science
how are the purposes of science and technology different?

english
I think it's funny too that if somebody reads the actual question, then looks at the answer choices; They'll know that 5 is incorrect because they're looking for the denotative meaning (dictionary definition), which would be "young person" and not "...

english
Tamika, it's just a comment. If you read them all, you'd know that the first answers posted are wrong and that the ones by Natasha are correct. :)

Physics
Imagine a very large nonconducting plate that has a uniform surface charge density σ =1 μC/m2; it also shows a point charge Q = -3 μC at distance d = 0.3 m from the plate. Both are fixed in place. We choose the origin of an x-axis at Q. At what positive ...

Physics
Find the magnitude of the acceleration (in m/s2) for an electron in a uniform electric field with a magnitude of 100 N/C. and Find the time it takes (in sec) for an electron initially at rest in a uniform electric field of 110 N/C to reach a speed of 0.01c (where c is the ...

Physics
Find the magnitude of the acceleration (in m/s2) for an electron in a uniform electric field with a magnitude of 100 N/C. and Find the time it takes (in sec) for an electron initially at rest in a uniform electric field of 110 N/C to reach a speed of 0.01c (where c is the ...

precal
Solve for y: (y-(10/y))^2+6(y-(10/y))-27=0

precal
solve for x: (x^2-2x)^2 -11(x^2-2x)+24

Math
anyone. please. i can't finish my homework without this help. I would realllllly appreciate it.

Math
how would you find the inverse function of a problem when you have a squared number like f(x)=(x^2-4)^2 PLEASE HELP

Chemistry
I'm doing a chemistry lab called colorimetric equilibrium study of a complex ion. But I just have one question which is how to obtain CS which is the total stoichiometric molarity of thiocynate ion and CF which is iron (III) iron. Fe+3 + SCN --> Fe(NCS)^+2 Fe(NCS)^+2 + ...

Math
My answers 1.b 2.A 3.d 4.b 100% correct

Math
My answers 1. D 2.A 3.c 4.b I got a 100% trust me will pass it

Physics
A stone is thrown straight upward with a speed of 12 m/s from the edge of a 70 m high cliff. How long is the stone in the air? What is the speed just before it hits the ground? What is the total distance the stone traveled?

child day care
Jean Piaget was a A. factory worker. B. pediatrician C. developmental psychologist. D. child care provider.

statistics
if the mean=100 and the standard deviation=8, calculate p(x>108)

Pre- Algebra
Follow the order of operations 1. Solve what is in the parthneses first 2. Exponent 3. Mutiplication 4. Division 5. Addition 6.Subtraction Trust me my answers are correct and you will past the test 100% correct

Pre- Algebra
9. 2s^3 -4r^2 r=1 s=5 2(5)^3-4(1)^2 Step1. 2(5)^3 5^3 = 125 125*2= 250 Step2. 4(1)^2 1^2 =1 4x1=4 Step3. 250-4= 246 So, 2(5)^3-4(1)^2 = 246

Pre- Algebra
1. Is -7 x-7 x-7x-7x-7 2. A 3. D 4. Is 1/3 5. 1/2 6. Square root of 3 7. 1 1/2 8. 0.57 can be written as a fractions decimal and integer. For example 0.57 can be written as 57/100. Trust me my answers are correct. Will get a 100%

math
And number 1 is 1 1/2

math
2. Is 4 batches 3. Sqaure root of 3 is a irrational number 4. Is 1/2 5. Is 4^8 6. 1/3 7. Positive 81 8. A 9. 2(5)^3 - 4(1)^2 =246 5^3 =125 125x2 =250 1^2= 1 4x1 =4 250-4 = 246 10. 0.57 is rational number because it can be written as a fraction, decimal and integer. For example...

precal
(x^2+11)/(3-x) x=4i

precal
Preform the indicated operations and write the results in standard form. ( i= imaginary number) √-12(√-4-√2)

physics
in a baseball game a 0.2 kg ball moving at 12 m/s is hit by a bat. after the impact the ball moves in the opposite direction with a velocity of 18 m/s. if the force exerted on the ball of the batter is 670 N. how long is the time of contact

Algebra 1
Yes, I think I got it. h2+8h+-16 H2-16=0 H2=16 squareroot of 16 = 4

Algebra 1
How to find the product? For example (h+4)(h-4)

English 11
1. personal 2. reflective 3.intesive

chemistry
A 20.0 mL sample of 0.687 M HBr is titrated with a 0.216 M NaOH solution. The pH after the addition of 10.0 mL of NaOH is __________. A. 0.413 B. 0.386 C. 0.163 D. 0.579 E. 0.237

chemistry
Thank you so much that cleared up a lot!

chemistry
A 20.0 mL sample of 0.687 M HBr is titrated with a 0.216 M NaOH solution. The pH after the addition of 10.0 mL of NaOH is __________.

History.
How did the role of the federal government change during the Progressive Era of the early 1900s. Include specific progressive legislation, discuss presidents and the enhanced power of the federal I need some help with finding some information and understanding

Math
What is the length of each side of a square that has the same area as a rectangle that is 12 mm long and 18 mm wide?

physics
A block is initially sliding along a horizontal surface with 24.6 J of kinetic energy. Friction causes the block’s speed to be halved in a distance of 3.20 m. a) What is the kinetic energy of the block after traveling the 3.20 m? b) What is the magnitude of the kinetic ...

biology
What are biomes and how are they influenced by latitude and elevation? Give Examples

divission
how do i do a 7 by 10 array look like

Physics
You (65 kg) are standing in an elevator traveling upward that passes the 3rd floor at 3.5 m/s and then passes the 4th floor at 4.5 m/s one second later. Find the normal force exerted on your feet by the elevator while it is passing between these floors. I got 6565 N, because ...

math
(35) + (-13) + (8) - (-6) = 35 -13 +8 + 6 = 49 - 13 = 36

math
4p + 9 + (-7p) +2 = 4p -7p + 9 + 2 = -3p +11 = 11-3p

math
4m + 9 + 5m -12 = 42 9m - 3 = 42 9m = 45 m = 5

math
y/9 + 5 = 0 y/9 = -5 y = -5 * 9 y = -45

math
3q+ 5 + 2q - 5 =65 5q = 65 q =13

math
-282 -(+1,017) -282 - 1017 = -1299

Physics
At time t = 0, you shoot a cannonball horizontally from the roof of a building at a velocity of 10 m/s. The building has a height of 80 m. Assume g = 10 m/s2 and that there is no air resistance. Write down the algebraic velocity equation for the y-direction of the ball with ...

Physics
At time t = 0, you shoot a cannonball horizontally from the roof of a building at a velocity of 10 m/s. The building has a height of 80 m. Assume g = 10 m/s2 and that there is no air resistance. Write down the algebraic velocity equation for the y-direction of the ball with ...

College Math
What is number of representatives in MS and what is the ratio of citizens to representatives?

UPDATE to Ms Sue
Thanks! I got it right the first time ,but I wasn't shure Thanks a ton!

UPDATE to Ms Sue
If JKL is similiar to DEF and JKl has sides that are 11 times greater than those of DEF what is the relationship between the perimeters of the triangles A. They are equal. B.The perimeter of DEF is 11 times greater than the perimeter of JKL. C. The perimeter of JKL is 11 times...

Update
If JKL is similiar to DEF and JKl has sides that are 11 times greater than those of DEF

Update
what is the relationship between the perimeters of the triangles A. They are equal. B.The perimeter of DEF is 11 times greater than the perimeter of JKL. C. The perimeter of JKL is 11 times greater then DEF. D. The perimeter of JKL is 121 times greater that DEF.

geometry
What is the area of a regular pentagon with a side length of 10 inches and a distance from the center to a vertex of 10 inches? Round your answer to the nearest tenth.

MATH
what is the relationship between the perimeters of the triangles A. They are equal. B.The perimeter of DEF is 11 times greater than the perimeter of JKL. C. The perimeter of JKL is 11 times greater then DEF. D. The perimeter of JKL is 121 times greater that DEF.

Update Geometry Question
What is the probability of a randomly tossed bean bag landing in the yellow target area? Gray is 2m and yellow 0.75m Use 3.14 for pi and round to nearest whole percent. A. 38 B.14 C.36 D.3

Math
I am a 4 digit number with 6 hundreds and 5 ones. The sum of all my digits is 15 .What number am I

physics- please respond
thank you !

physics- please respond
A 0.130kg baseball pitched at 35.5 m/s is hit on a horizontal line drive straight back at the pitcher at 50.5 m/s . Part a: If the contact time between bat and ball is 4.25×10^−3 , calculate the magnitude of the force (assumed to be constant) between the ball and ...

physics- please respond !
A 0.130kg baseball pitched at 35.5 m/s is hit on a horizontal line drive straight back at the pitcher at 50.5 m/s . Part a: If the contact time between bat and ball is 4.25×10^−3 , calculate the magnitude of the force (assumed to be constant) between the ball and ...

ALGEBRA II
Using a standard deck of cards, find the probability that: 1) You choose two cards and one is a face card and the other is black 2) A black jack and then an ace are drawn

Social Studies
It's B - he was really rich and his monopoly just kept getting bigger and bigger, which meant there was essentially no competition and the idea of 'survival of the fittest' became less and less hopeful for other companies. Please answer my question id=1338522681 :)

physics- MC QUESTION!
Question: A particle is initially traveling to the right when it hits a wall and turns around to the left. The momentum after the collision is less than the initial momentum. a-the impulse on the particle is to the right b-the impulse on the particle is to the left c-there is ...

PHYSICS!
Two blocks are connected by a massless cord and are being pulled to the right by an external force F. They are accelerating at 2 m/s2. If needed, use g = 10 m/s2. With a coefficient of kinetic friction of 0.3, the external force acting on the 8 kg block is most nearly A.55 N B...

Chemistry
I did a rough answer to this question with my tutor earlier today and I see what you're saying with the switching, I'm having issues understanding how to do this one properly.

Chemistry
4. 5.6 x 10-6 mol of A and 5 x 10-5 mol of B are mixed in a 200 mL flask. The system is represented by the equation: 2A + B --> 3C I 2.8x10-5 M 2.5x10-4 0 C -2x -x +3x E 2.8x10-5-2x 2.5x10-4-x 3x10-5 B = 2.5x10-4-x = 2.4x10-4 x = 1x10-5 A = 2.8x10-5-2(1x10-5) = 8x10-6 C = ...

Chemistry
3x = 0.006, x = 0.002 A = 0.004 B = 0.006 A2B3 = 0.01-0.002 = 0.008 (0.004)2(0.006)3/(0.008) = 4.32x10-10

Chemistry
A2B3 --> 2A + 3B I 0.001 0 0 C –x 2x 3x E 0.001-x 2x 3x 3x = 0.006, x = 0.002 A = 0.004 B = 0.006 A2B3 = 0.001-0.002 = (0.004)2(0.006)3/ Am I close?

Chemistry
oh shoot, sorry.. 4. 2A + B --> 3C 3. A2B3 --> 2A + 3B

Chemistry
PLEASE fully explain these...I've already tried to figure them out and failed terribly... thanks so much 4. 5.6 x 10-6 mol of A and 5 x 10-5 mol of B are mixed in a 200 mL flask. The system is represented by the equation: At equilibrium, there is 4.8 x 10-5 mol of B. ...

chem
At what temperature will a 1.0 g sample of neon gas exert a pressure of 500 torr in a 5.0 L container ? or At what temperature will a 0.0470 mol of a gas fill a balloon to 1.20 L under 0.988 atm pressure ?

social studeis
why do people celebrate when its kosovo's independence day?

Chemistry
25 mL of NaOH 0.16 M is added to 50 mL of 0.1 M HCl. What is the concentration of hydroxide ions in the solution?

Chemistry
Calculate the volume of NaOH 0.5 mol/L necessary to neutralize 300 mL of HCl 0.2 M.

Chemistry
Calculate the [H+] of a solution obtained by mixing 1 L of hydrochloric acid 1.0 M with 1 litre of sodium hydroxide 0.990 M.

Chemistry
What mass of NaOH(s) must be added to 300 mL of HCl 0.25 M in order to completely neutralize this acid?

Chemistry
The Kc for the following reaction at 940oC is 1.38. Given the concentrations [CO2] = 0.500 M, [H2] = 0.425 M, [CO] = 0.610 M and [H2O] = 0.695 M, one can conclude that: H2(g) + CO2(g) ↔ CO(g) + H2O(g) Question 8 options: A) the system is not at equilibrium and the ...

Chemistry
Which of the following pairs of compounds will give a precipitate in a diluted solution? Question 4 options: A) Cu(NO3)2 and Na2CO3 B) KNO3 and NaCl C) MgCl2 and Ba(NO3)2 D) NH4Cl and Al2(SO4)3

Chemistry
A solution contains I-, Br- and OH- ions. If Ag+ is added, what will the precipitate(s) be?

Chemistry
Is it 3.9 x 10^-7 M?

Chemistry
What is the maximum concentration of Ca2+ ions in a solution containing 0.010 M of F- ions?

Chemistry
A mixture of lead, magnesium, nitrate and chromate ions are present in a solution. What will the precipitate be? Question 2 options: A) MgPb B) Pb(NO3)2 C) PbCrO4 D) MgCO3

chemistry
You work with the following system: 2X(g) <--> Y(g) At, equilibrium, [Y]=3[X]. If K=10, calculate the [Y] at equilibrium.

Trig
If you are dealt 3 cards from a shuffled deck of 52 cards, find the probability that all 3 cards are picture cards.

Probability
If you are dealt 3 cards from a shuffled deck of 52 cards, find the probability that all 3 cards are picture cards.

OSU
For the equation f(9.5)=P(2.5)^9.5 solve for P.

Calc 2
Find the area of the region inside r=19sin(theta) but outside r=3

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