# Posts by Katie

Total # Posts: 2,096

**Physics**

Update: Planets are not uniform inside. Normally, they are densest at the center and have decreasing density outward toward the surface. Model a spherically symmetric planet, with the same radius as the earth, as having a density that decreases linearly with distance from the ...

**Physics**

A small block is attached to an ideal spring and is moving in SHM on a horizontal, frictionless surface. When the amplitude of the motion is 0.090m , it takes the block 2.68s to travel from x= 0.090m to x= -0.090m . If the amplitude is doubled, to 0.180m , how long does it ...

**Language Arts**

Lee IS right!!! 100% Ohhhh yeah!

**Language Arts**

Is Lee right or wrong?? -.- I need to know

**Math**

you have four $1 bills, two $5 bills, five $10 bills, and five $ 20 bills in your wallet. You select a bill at random. Without replacing the bill, you choose a second bill. What is P($1, then$ 10)?

**Art**

Yep Anon was right! Thanks sooooo much!! :D

**Art**

The answer was D XD And btw if you go to connections 1 was c and 2 was b Just saying ;)

**Chemistry**

Gaseous ethane will react with gaseous oxygen to produce gaseous carbon dioxide and gaseous water . Suppose 16.2 g of ethane is mixed with 19. g of oxygen. Calculate the maximum mass of carbon dioxide that could be produced by the chemical reaction. Round your answer to ...

**english**

C. They are just going to have to wait to see the movie.

**physics**

The man fires an 75g arrow so that it is moving at 80 m/s when it hits and embeds in a 13kg block resting on ice. What is the velocity of the block and arrow just after the collision? How far will the block slide on the ice before stopping? A 7.2N friction force opposes its ...

**science help**

1. A 2.d 3.d 4. B trust me will past! 100%!

**Chemistry**

Sulfuric acid dissolves aluminum metal according to the following reaction: 2Al(s)+3H2SO4(aq)→Al2(SO4)3(aq)+3H2(g) Suppose you wanted to dissolve an aluminum block with a mass of 14.5g . 1.) What minimum mass of H2SO4 would you need? 2.)What mass of H2 gas would be ...

**Math**

If someone could help me with this, I would appreciate it! Thanks! Directions: Determine if these two are inverses of one another. A= [ 1 1 1 3 5 4 0 -1 0] A^-1= [ 4 -1 -1 0 0 -1 -3 1 2]

**Math check**

Yo was right for CO Connections multiplying polynomials

**Science**

OH YEAHHH! GOT 100% TOOOO! THANKS SO MUCH!!

**social studies**

1.gobi desert 2. Taiwan 3. mountain ranges make much of the region too dry to farm 4. other ethnic groups need a higher birth rate to survive.

**Physics**

A small wooden block with mass 0.800kg is suspended from the lower end of a light cord that is 1.52m long. The block is initially at rest. A bullet with mass 0.0126kg is fired at the block with a horizontal velocity v0. The bullet strikes the block and becomes embedded in it. ...

**physics**

Consider a purely inductive ac circuit in which the maximum voltage across the inductor is Vmax=98.0V. If the maximum current is 7.40A at 40.0Hz, what is the inductance L? Answer in mH.

**physics**

A 39-turn circular coil of wire has a diameter of 1.2m. It is placed with its axis along the direction of the Earth's magnetic field of 58μT at 52° below the horizontal, and then in 0.16s it is flipped 180°. a) What is volts the magnitude of the average ...

**math**

I want to plot my vertex on a cartesian plane. My question is can i go by different values on the axis? Since my vertex is (1, -64) could i go by 8 on the y axis, and by 1 on the x axis???

**Science**

An object weighing 90 N has a volume of 45 mL and a mass of 9.0 g. What is its density? a. 0.10 g/mL b. 0.20 g/mL c. 5.0 g/mL d. 10 g/mL

**History**

@ Ms.Sue could you check this please

**History**

Where is the erie canal located? A- New york B- New Jersey C-Maryland D- Maine Cities grew along railroads and canals because A- the government designed the cities B- workers could not live anywhere else C- settlers could obtain cheap land nearby D- there were not enough roads...

**vectors**

The minute hand of a wall clock measures 11 cm from its tip to the axis about which it rotates. The magnitude and angle of the displacement vector of the tip are to be determined for three time intervals. What are the (a) magnitude and (b) angle from a quarter after the hour ...

**geometry**

A child on top of a lighthouse observes two ships that are 90 ft apart from each other. The angles of the depression of the two ships are 34º and 20º. How far is the closest ship from the base of the lighthouse? I'm sorry, I would show my work, I just don't ...

**Geometry**

A child on top of a lighthouse observes two ships that are 90 ft apart from each other. The angles of the depression of the two ships are 34º and 20º. How far is the closest ship from the base of the lighthouse? I'm sorry, I would show my work, I just don't ...

**algebra**

The mean on a Advanced Algebra test was 78 with a standard deviation of 8. If the test scores are normal distributed, find the interval about the mean that contains 99.7% of the scores. Use the empirical rule.

**math**

Mr. Smith’s first period class had an average of 90% on the first test, and his 4th period class had an average of 82%. If there were 30 people in his first class, and 22 in his second, what is the average score of someone in his class?

**Math**

Invisible braces cost $500 more than metal braces. Metal braces cost $4,800. How muchdo invisibles braces cost?

**language arts**

She is not all the way bad I got the answer to 6 from here.

**Physics**

Determine the magnitude of the gravitational force Mars would exert on man if he was on the surface of Mars. The mass of the man is 69.0kg . The mass of the Mars is 6.42×1023kg and its radius is 3396 km.

**language arts**

The young woman Lavinia Lyte sat at last and murmured to herself then to Johnny: "I must talk to toy, Jonathan Lyte tremain" Which of the following best explains why Johnny is so surprised by Lavinia Lyte's statement in this passage? a. Lavinia seems irritable ...

**language arts**

Which of the following passages from Johnny tremain is most useful in helping you determine what type of ruler general gage is? Select all that apply A. Sam Adams was so happy his hands shook worse then ever B. He was not brilliant but he was no tyrant C. His majesties fleet ...

**Science-Physics**

A mover is pushing a crate across the floor. He exerts a force of 500 Newtons and pushes the crate a distance of 5 Meters. How much work did the mover do on the crate?

**algebra**

***I USED A DIFFERENT PROBLEM. FOLLOW THE STEPS!!! The vertex is either the minimum point of the graph of the maximum point of the graph if the equation is a quadratic equation. if it is the minimum point on the graph, than any other point on the graph will be above it. if it ...

**chemistry**

ok thank you so much

**chemistry**

is the answer 30?

**chemistry**

so i would solve for x

**chemistry**

gasoline sold in ontario must contain at least 5.00% v/v ethanol? How much gasoline contains 1.50 L of ethanol

**language arts**

Johnny Tremain How does Rab's reaction to Johnny's hand compare to that of other people's? A like others, Rab is horrified B While others react with disgust or pity, Rab ignores the injury until Johnny mentions his band hand C Rab expresses great pity for Johnny&#...

**language arts**

nope it wasn't c

**biology**

that doesnt give an exact diagram. most of those diagrams are of other plants

**biology**

yes. im really stuck as i need to submit it today(online) i already found the leaf structure about my flower. but the root and stem structure is what i am having real difficult finding

**biology**

no i cant... i really tried to find sites but none explain the stem or the root of this flower.

**biology**

Explain parts of the stem structure in the lilac flower or a flower similar to the lilac flower

**chemistry**

A piece of Cu wire is placed into 1.00L of a saturated solution of silver acetate, AgCH3COO. When all the Ag+ has reacted, 2.00g of Cu has been used. A) Write the net ionic equation for this reaction between Cu and Ag+. B) Calculate the Ksp of AgCH3COO. Thank you!

**language arts**

Sorry yes I do. So is it a?

**language arts**

which of the following sentences from Johnny Tremain provides evidence that ran is having a positive effect on Johnny? A he liked to make handsome entrance. Even if he had Goblin had dawdled a bit on country roads, they both liked arriving at the inns at a gallop B For the ...

**language arts**

Which point of view is are the sentences written? It was past dawn when he awoke, his feeling of contentment still in him. He was no longer his own problem but Merchant Lyte's. Tomorrow at this time what would he be calling him? Uncle Jonathan? Cousin Lyte? Perhaps grandpa...

**Introductory to Physical Science**

i had the same question and someone said a but i do not know why still

**Science/Math**

oh ok yes that makes sense thank you

**Science/Math**

explain why?? bobpursley

**Science/Math**

If a student submerges a stopper with a volume of 6.1mL into a cylinder of thick syrup, what will happen to the syrup?

**Calculus**

A particle moves along line segments from the origin to the points (3, 0, 0), (3, 3, 1), (0, 3, 1), and back to the origin under the influence of the force field F(x, y, z) = z2i + 5xyj + 4y2k. I have tried multiple times to solve this problem but the answer is still not right.

**Science**

Suppose that you heated a sample of a hydrated ionic compound in a test tube. What might you expect to see inside the test tube, near the top of the test tube? Explain please i really am stumped on this question...

**Math**

if f(x) = 2x^2+4 and g(x)=x-3 which number satisfies f(x)= (f o g)(x) A) 3/2 B) 3/4 C) 5 D) 4 I am positive that answer A is correct, i just cant get the work to prove it, i can disprove all other answers and my teacher has assured me i am on the right track, he wants work ...

**physics**

Your car is stuck in the mud. you have 2 pulleys, rope, and a sturdy tree. ignoring friction how much force can you apply to the car if you are able to pull on the rope with 150lbs of force?

**chemistry**

3 moles C6H12O6 in 100 ml equals what molarity?

**Math - ratio**

5:3

**Math**

what is the answer to this problem?

**Math**

Thank you for the answer

**Chemistry**

oh i get it, it came from the initial... thank you !

**Chemistry**

why is it 2-2x? isn't it only just -2x?

**Chemistry**

Consider the following equilibrium: 2HI(g) *are in equilibrium with* H2(g) = I2(g) Keq = 81.0 A 2.00L container is initially filled with 4.00 mol HI. Calculate the [HI] at equilibrium. *I don't know how to put the equilibrium sign on the computer* Can someone please ...

**Chemistry**

I'm having trouble understanding Boyle's Law and Dalton's law of partial pressures. Can anyone help me work this please? Thank you A sample of propane gas, C3H8, was collected over water at 22.5 ºC and 680. torr. The volume of the wet gas is 3.89 L. What will ...

**stats**

367.75

**Language Arts**

Answer is b with anger

**English: Faulty Coordination**

Thank you Ms. Sue! But does my correction of #1 work? Is it correct?

**English: Faulty Coordination**

Rewrite the over coordinated sentences that follow, changing clauses into phrases or into single words. where appropriate, break the over coordinated sentence into two sentences. 1. The doctor inserted one end of a long tube into my throat, and she attached the other end of ...

**Physics**

A figure skater is spinning at a rate of 1.1 rev/s with her arms outstretched. She then draws her arms in to her chest, reducing her rotational inertia to 66% of its original value. What is her new rate of rotation?

**idk**

think about what both human and a machine can do.

**math**

The correct is c 22 trust me will pass it.

**physics**

A line directed to the west. A plane flies 20 degrees north of that direction ( 90 degrees north of that direction would be north..) if the plane flies for 340 km, determine its displacement toward the west and its displacement toward the north during its flight?

**math**

The Murphy family just drove 300 miles to visit their grandparents. Mr. Murphy drove 70 mph for 65% of the trip and 35 mph or less for 20% of the trip that was left. Assuming that Mr. Murphy never went over 70 mph, how many miles did he travel at a speed between 35 and 70 mph...

**HEALTH AND P.E ONE QUESTION HELP!!!!!!!!!!**

1. C 2. True 3. True Trust me I got a 100% correct 3/3

**Chemistry**

thank you very much!

**Chemistry**

oh I mean, is 3 a heterogeneous reaction, not 3a. But a gas and an aqueous is a heterogeneous reaction correct? Thanks!

**Chemistry**

Increasing the surface area will increase the reaction rate in: 1. N2(g) + O2(g) -> 2NO(g) 2. 2Mg(s) + O2(g) -> 2MgO(s) 3. CaCO3(s) + 2H+(aq) -> Ca2+(aq) + H2O(l) + CO2(g) MY WORK: I think it is 2 & possibly 3. 1 is a homogeneous reaction but is 3 a heterogeneous ...

**geometry**

636

**Physics**

A car accelerates from rest at 5 m/s2 for 5 seconds. It moves with a constant velocity for some time, and then decelerates at 5 m/s2 to come to rest. The entire journey takes 25 seconds. On a separate sheet of paper, plot the velocity-time graph of the motion. Describe the ...

**Physics**

You want to use a rope to pull a 12-kg box of books up a plane inclined 30∘ above the horizontal. The coefficient of kinetic friction is 0.29. The rope pulls parallel to the incline. What force do you need to exert on the rope if you want to pull the box with a constant ...

**PLEASE CHECK! ELA**

The answer is C, Compound Subject

**history**

C. reassure white American settlers that the frontier was safe and peaceful ?

**history**

what is the answer

**Please help me with this Q**

A. 4.8

**Statistics**

It is actually C - 30th

**college physics**

tennis ball rolls off the edge of a tabletop 0.900m above the floor and strikes the floor at a point 1.60m horizontally from the edge of the table. A: Find the time of flight of the ball B: Find the magnitude of the initial velocity of the ball. C: Find the magnitude of the ...

**Math**

How many tenths are there in 4/5

**Algebra 1**

the temperature at noon in los angeles on a summer day was 88 degrees fahrenheit. during the day, the temperature varies from this by as much as 7.5 degrees fahrenheit. write and solve an absolute-value inequality to find the range of possible temperature for that day.

**English**

I have recently been checking a few answers on this site and I have noticed Ms. Sue isn't really helpful, although she comments a lot. What would actually help is if she explained why the answer was wrong or at least said something other than "yes" and "no&...

**Civics**

Wow.Nobody answered the questions. That's pretty sad.

**geometry**

ABCD is a rhombus with diagonals Imported Asset and Imported Asset . Is angle ABD congruent to angle CBD?

**ashford**

Ruby emailed her instructor a question and he replied to her immediately.

**math**

That helped. Thankyou Ms.Sue

**math**

a 15 foot ladder is leaning against a house with the base of the ladder 4 feet from the house. How high up the house does the ladder reach? round to the nearest tenth foot.

**Math**

12

**math**

What is the period, in seconds, of a simple pendulum of length 3 meters? Use the gravitational constant g = 9.8 m/s2 and round your answer to two decimal places Please help! A step by step would with the answer would be helpful!

**Pre-Calc**

2. The polar coordinates of a point are given. Find the rectangular coordinates of each point. a. (5,(π / 4)) b. (-2,(π / 6)) NOTE: I tried to do these myself and got that: a= (4.99,0.27) b=(-1.99,-0.11) Which I know these are wrong, so I don't know how to do ...

**Chemistry**

A solution of the primary standard potassium hydrogen phthalate, KHC8H4O4, was prepared by dissolving 0.4877 g of potassium hydrogen phthalate in about 50 mL of water. Titration with a KOH solution required 24.71 mL to reach a phenolphthalein end point. What is the molarity of...

**Science**

Here are my an answers 1.b 2.A and d 3. B d e 4. D 5. C d e 6. A and b 7.c 8.b. 9.b 10. D 100% correct