# Posts by Jamie

Total # Posts: 1,155

**Health and PE**

Oxygen enters the blood in the ? 1)bronchi 2)pharynx 3)larynx 4)alveoli I think #4 Thanks !

**social studies**

Which climate region dominates most of Northern Africa? 1)humid continental 2)highland 3)tundra 4)arid I think #4 after looking at the maps. Can you confirm? Thank you for your help.

**Science**

Which of the following functions like a fulcrum in a lever? A:tendons connecting a muscle to a bone at a joint. B:ligaments connecting bones at a joint. C:two muscles working as a pair to move a joint. D: two bones meeting at a joint. I think the answer is B. Thank you.

**Physics**

A 1.45 kg book is sliding along a rough horizontal surface. At point A it is moving at 3.25 m/s , and at point B it has slowed to 1.34 m/s . Part A How much work was done on the book between A and B? Part B If -0.750 J of work is done on the book from B to C, how fast is it ...

**Physics**

A rope is tied to a box and used to pull the box 1.7 m along a horizontal floor. The rope makes an angle of 30? with the horizontal and has a tension of 5 N. The opposing friction force between the box and the floor is 1 N. Part A How much work does gravity do on the box? Part...

**Physics**

A tennis player hits a 58.0 g tennis ball so that it goes straight up and reaches a maximum height of 7.02 m . Part A How much work does gravity do on the ball on the way up? Part B How much work does gravity do on the ball on the way down?

**Science**

metals Thank you.

**Science**

What kind of substance does the following, reflects light, warms up in my hand, flattens out if hit with a hammer, conducts electricity? 1)nonmetal 2)metal 3)metalloid I think #3

**Geography**

Distortion on a map may change the shape of? 1)a globe 2)the equator 3)the Prime Meridian 4)some landmasses I think #4

**Geography**

Globe....thanks Ms.Sue. You always point us in right direction. I appreciate you and all the tutors.

**Geography**

I know that the equal-area is used to show landmasses but my reading did not mention the bodies of water. Thanks

**Geography**

The most accurate way to show Earth's continents and bodies of water is with a(an)? 1) Mercator projection 2) globe 3) Robinson projection 4) equal-area map I think #3

**Math**

solve the inequality: -3(4-a)=6 1) -6 2) -2 3) 2 4) 6 I think #1 is correct. Can you check? Thanks

**Math**

A semi circle sits on top of a rectangle to form the figure below find its area and perimeter use 3.4 for pie on the side 4 inches and on the bottom 6 inches what is the answer

**Math**

Orly uses 2 cups of raisins for every 8 cups of trail mix she makes how many cups of trail mix will she make if she uses 12 cups of raisins

**Math**

Solve the inequality: 25>1-3d A) d<-8 B) d>8 c) d<8 D) d>-8 I think B

**Health and PE**

What substance in tobacco products causes stained teeth and skin? 1) nicotine 2)carbon monoxide 3)tar 4)menthol I think #1 Thanks

**Science**

Sodium is a medal and chlorine is a poisonous gas. Neither is safe to eat. However, when sodium and chlorine is combine, it produces edible table salt. What can be concluded? 1) Table salt has similar physical properties of both reactants. 2)Table salt is a metalloid with ...

**Physics**

Artificial gravity. One way to create artificial gravity in a space station is to spin it. If a cylindrical space station 325 m in diameter is to spin about its central axis, at how many revolutions per minute (rpm) must it turn so that the outermost points have an ...

**Physics**

You tie one end of 0.3-m-long spring to a 0.5 kg mass. Holding the other end of the spring in your hand, you whirl the mass in a vertical circle at a speed of 3 m/s. If the spring elongates 5 cm at the lowest point in the circular motion, what is the spring constant?

**Algebraic Properties**

Can you tell me the properties of algebraic expressions? Is there a website? Thanks for your help.

**Math**

use the inverse operation to solve below equation. 19= h/3-8 equals 81 Thanks

**English**

C: The lion (smelled) the steak.

**English**

In which of the following sentence is the underlined verb used as an action verb? 1) The animal (looked) hungry. 2) The trainer (felt) worried. 3) The lion (smelled) the steak. 4) The steak (tasted) good. I think B Thanks.

**Math**

Factor 81-27p is A)9(9-3p) B)27(3-p) C)27(54-p) D)27(p-3) I think A but not sure. Is there a website that explains simplifying Algebraic Expressions? Thanks for your help.

**Science**

Which physical properties are characteristic of normal solids? 1)brittle 2)little luster 3)malleable 4)ductile 5)good conductors of heat I think #1 and #2

**Science**

Which physical properties are characteristic of metals? Choose all that apply. 1) brittle 2)high luster 3)malleable 4)ductile 5)not very reactive I think #s 2,3 and 4 Thanks

**social studies**

After the Scientific Revolution, scientists no longer made their ideas about science fit? 1) the results of their experiments 2) the teachings of the church 3)their observations in nature 4)their political beliefs I think #2 Thanks

**Health and PE**

_____ is at the top of Maslow's hierarchy of needs? 1) physical needs 2)safety 3)esteem 4)self-actualization I think #4 but all are important. Thanks

**Science**

When you measure the boiling point of mercury, you are investigating a ____? 1)chemical change 2)chemical property 3)physical change 4)physical property I think #3. This is a practice but want to make sure. Thanks,

**SS**

sorry I think the answer is C, Thank You

**SS**

During the Middle Ages, why was life in northern Italy different from life in the rest of Europe? A:italians were threatened by Muslim invaders. B:italians were not as closely controlled by nobles or the church. C:italians were controlled by popes and kings. D:italians were ...

**social studies**

Which group was especially interested in winning the Crusades? 1)farmers 2)teachers 3)merchants *** 4)artists I think merchants, because of the trade. Thanks for your help.

**Health and PE**

Which of the following plays a role in determining a persons weight? select all that apply A:heredity. B:activity level. C:body mass index (BMI). D:body composition. I think the answers are B, C, and D. Thank you.

**social studies**

In the Middle Ages, ceremonies such as weddings had t be performed by? 1) the mam of the house 2)a bishop 3)a priest 4)the pope I chose #2 but reading stated the clergy attended all ceremonies. If the man of the house and clergy are the same then it would #1. Thank you.

**social studies**

Why did the system of feudalism arise during the Middle ages? A:to develop an economic system. B:to determine jobs within a city. C:to defend the countries from attacks. D:to organize the household of noblemen. I think the answer is C. Thank you

**Science**

I think #3 because it combine 2 mixtures, but #4 also is combination of mixtures but not in same amt.

**Science**

Which of the following represents a heterogeneous mixture? 1)saltwater 2)air 3)bleach and water 4)chicken noodle soup I think #3 Thank you.

**AP Chemistry**

In the reaction below, 17 g of H2S with excess O2 produced 10 g of sulfur. 2 H2S + O2 ? 2 S + 2 H2O . What is the percent yield of sulfur? Answer in units of %.

**AP Chemistry**

Got it! Thank you :)

**AP Chemistry**

The reaction of 8 grams of fluorine with excess chlorine produced 6.4 grams of ClF3. What percent yield of ClF3 was obtained? Answer in units of %

**AP Chemistry**

Thank you!!

**Chemistry - Rates**

For a particular reaction, the rate constant is 2.32???10?3 M/s at 185°C and 3.70???10?3 M/s at 235°C. What is the activation energy for this reaction? _______ kJ/mol

**Chemisty - Colligative properties/freezing point**

QUESTION: How do you determine the molar mass of the unknown, nonelectrolyte compound for each trial? This is for a lab. My data is: freezing point of solvent (water): -0.58 freezing point of unknown: -0.93 Mass of solvent (water): 19 ml Mass of unknown: 1.045g I know the ...

**social studies**

yes, the calendar ! Thank you, Ms.Sue

**social studies**

Which of the following was an achievement of the Mayas? 1) a system of canals in their main city? 2) the city of Tenochtitlan 3) a calendar 4) a strong army I think it is 1 but not sure. Thanks for your help.

**Chemistry - Colligative properties/freezing point**

I need help on my lab. I think I have all the data and steps right, but my results aren't making sense: Feezing point of water: -0.58 C Freezing point of Unknown: -0.93 C Freezing point depressions: 0.34 C Mass of unknown: 1.045 g, mass of solvent (water): 19 ml, Water=1....

**Chemistry**

The rate constant for the decomposition of acetaldehyde, CH3CHO, to methane, CH4, and carbon monoxide, CO, in the gas phase is 1.59???10?2 L/mol/s at 711 K and 3.63 L/mol/s at 855 K. Determine the activation energy (in kJ/mol) for this decomposition. ______ kJ/mo

**Chemistry**

At 500 K in the presence of a copper surface, ethanol decomposes according to the following equation. C2H5OH(g) CH3CHO(g) + H2(g) The pressure of C2H5OH was measured as a function of time and the following data were obtained. Time (s) PC2H5OH (torr) 0 250. 100. 237 200. 224 ...

**social studies**

The port cities of East Africa traded with ? 1)China,India, and Soutwest Asia 2)Songhai 3)Europe and the Americas 4)Portugal I think number 1. I have read the text several times but still not sure. Thanks for your help.

**Math. Please help!!**

The "perpendicular bisector" of the line segment \overline{AB}(The backslash then over line with the {AB} means that there's a line over AB) is the line that passes through the midpoint of \overline{AB} and is perpendicular to \overline{AB}.

**Algebra A**

The "perpendicular bisector" of the line segment \overline{AB}(The backslash then over line with the {AB} means that there's a line over AB) is the line that passes through the midpoint of \overline{AB} and is perpendicular to \overline{AB}.

**Algebra A (1510)**

Yes, I do.

**Algebra A (1510)**

Also how do you find slope?

**Algebra A (1510)**

Thanks for the help!

**Algebra A (1510)**

The "perpendicular bisector" of the line segment $\overline{AB}$ is the line that passes through the midpoint of $\overline{AB}$ and is perpendicular to $\overline{AB}$. The equation of the perpendicular bisector of the line segment joining the points (1,2) and (-5,...

**College Algebra**

I hope it makes sense now ^-^

**College Algebra**

You would treat the greater than or equal to sign like an equation. So, you would subtract 1/2 from each side so y would be greater than or equal to 1/6. In interval notation it would be: [1/6, inf)

**Science**

thank you

**Science**

2. Which of the following describes a relationship between science and society? A: Scientific discoveries can impact human life; therefore, society must remain scientifically literate. B: Scientific discoveries rarely impact human life; therefore, it is not necessary for ...

**social studies**

Mecca lay on a trade route on the edge of the desert that takes up most of? 1)the Red Sea 2)Syria 3)the Kabah 4)the Arabian Peninsula I think # 4 is correct even though, today most of this area is Syria. Thanks

**Spanish 1**

Which of the following geographical locations share borders with SPAIN? 1)Portugal, France, Atlantic Ocean 2)France, England, Pacific Ocean 3) Italy, France, Mediterranean Sea I think #1 Thank you

**Calculus II**

Find the derivative of 5^(x^3+x) I know the answer, it's: 5^(x^3+x)*ln(5)*(3x^2+ 1) I just need some help on how to derive that. What rule is at work here? where did the ln come from?

**Economics - Finance**

Your first baby was born yesterday and is healthy and strong. To guard against your premature death, you want to purchase a life insurance policy that will replace $58,000 of your annual income until your child is 20 years old. How much life insurance should you purchase, if ...

**Chemistry **

A chemist makes a solution of K2SO4 by dissolving 21.7 g K2SO4 in water to make 100.0 mL of solution. What is the concentration of SO42? ions in the solution? Assume that K2SO4 is the only solute in the solution. The molar mass of K2SO4 is 174.27 g/mol.

**Math**

Thank you. The answer is 34%?

**Math**

THe Acme Industrial Tech College has fallen on hard times. Last year its enrollment dropped by 20%, and this year enrollement dropped another 15% from last years. Next year the college expected to have 50% of this years enrollment. What percent of enrollment can be expected to...

**Chemistry - Stoichiometry/gases**

Ah, Okay. Thanks!

**Chemistry - Stoichiometry/gases**

When 2.38 g of methane burns in oxygen, 119 kJ of heat is produced. What is the enthalpy of combustion (in kJ) per mole of methane under these conditions? Your answer will be in kJ/mol. the Molar Mass of methane is 16.04, so I did 2.38g/16.04=0.14838 mol Then I did 119 kj/0....

**Calculus 2**

Determine the first three terms of the power series representations for the following functions: a) 2/(1+x)^3 b) 1/1+x^2 c) ln(1+x)

**Calculus 2 - Indeterminant forms**

lim (2^x-3^x)/(cos(x)-1) x->0 The answer the book has for this is "diverges." I know I'm supposed to use L'Hospitals' rule, but I'm not sure how. Can you walk me through the steps?

**Chemistry**

Ah, Okay. Thank you so much for your help. I'll be sure to pay more attention to that in the future.

**Chemistry**

Huh... that's weird then. I ended plugging this in: ln(56.1/101.325)=(29820/8.314)((1/T2)-(1/380.85)) And solved -0.59119=(29820/8.314)((1/T2)-(1/380.85)) to get 349.93. Then I subtracted 273.15 to get 76.78 C.

**Chemistry**

Okay, I wasn't converting kPa to atm. That was the problem. I got 76.8 C, and that was the right answer. Thank you for your help!

**Chemistry**

yeah, I did that. I've got P1=65.1 P2=56.1 T1=330.85 K T2=? H=29,830 j/mol Plugging this in, I got 40.6. But my HW system isn't accepting it.

**Chemistry**

At 57.7°C, the vapor pressure of CCl4 is 56.1 kPa, and its enthalpy of vaporization is 29.82 kJ/mol. Use this information to estimate the normal boiling point (in °C) for CCl4.

**Chemistry - thermochemistry**

Hydrogen gas (H2) is generated by the following reaction. Ca(s) + 2 HCl(aq) ? CaCl2(aq) + H2(g); ?H = ?542.7 kJ/mol When this reaction takes place in a cylinder (fitted with a piston) containing 1.000 mol Ca(s), 542.7 kJ heat is lost to the surroundings. Because a gas is ...

**Chemistry - Kinetic Molecular Theory**

I found an online calculator to check the work, and it gave me 1.086 g/L, which the HW system accepted. I don't really understand what I did wrong... It seems to depend on how I enter it into my calculator: (0.97763*23.036)/(0.08205746*285.35) gives me 1.086 (0.97763*23....

**Chemistry - Kinetic Molecular Theory**

Question: What is the density (in g/L) of ethyne gas at 743 torr and 12.2°C? The unrounded molar mass of ethyne is 26.036 g/mol. I did some unit conversions, so 743 torr=0.97763 atm and 12.2°C=285.35°K I used the equation d=PMr/RT and I plugged in values to get d=(...

**Economics - Formula Help**

Instead of spending the $50 a month you receive, you decided to invest it in your money market account at your bank. Assuming you will earn an average of 5% each year and inflation is forecasted to 2.5% a year, how much have you effectively earned after ten years? (Hint: must...

**Economics**

If there was a baby boom of Oompa Loompas ready to work for free, what will happen to the Willy Wonka chocolate market? In particular: Has this affected supply or demand of Willy Wonka Chocolate? What has happened to the price of Willy Wonka chocolate? Please describe the ...

**Chemistry**

If the maximum velocity v of an electron in copper wire is about 2.0x10^8 cm/s, with an uncertainty ? 1%, how accurately can the electron's position be determined? In other words, what is the uncertainty in the position of the electron (in meters)?

**Math Probability**

A number cube is rolled 450 times. The number 3 comes up 67 times. What is the theoretical and experimental probability of rolling a 3 ? I think the answer is 2/9 but not sure of the process. Can someone explain to me. Sorry to be so much trouble. Thanks

**Math Probability**

You mix the letters M,A,T,H,E,M,A,T,I,C,A and L, thoroughly, Without looking , you draw one letter. Find the probability P(A). Write the probability as: A) fraction in simplest form B) a decimal C) a percent there are 3 letter A"s, so my answers are A)1/4 B).25 C) 25% can...

**math**

From a barrel of colored marbles, you randomly select 5 blue, 2 yellow, 3 red,4 green, and 2 purple. Find the experimental probability of randomly selecting a marble that is NOT yellow. 1) 9/16 2) 7/8 3) 8/9 4) 3/4 I think 7/8 Thanks.

**Chemistry - Significant Figures**

Suppose it takes 35 min for 2.4 g of sugar to completely react with another reagent we added to the flask. What would the reaction rate be? Calculate to the correct number of significant figures.

**math**

Thanks, I went a little foggy.

**math**

A single, standard number cube is tossed. What is the probability of getting a number greater than 3? 1) 2/3 2) 1/3 3) 1/6 4) 1/2 I think 1/2 Thanks

**math**

C is the correct answer...thanks for helping me.

**math**

A coin is flipped 3 times. How does the P (H,H,H) compare to P(H,T,H) ? 1)P (H,H,H) is greater than P(H,T,H) 2) P(H,T,H) is greater than P(H,H,H) 3)The probabilities are the same 4)There is no way to tell with the info given I think #4 is correct...can you advise? Thanks

**math**

A coin is tossed and a number cube is rolled. What is P(heads, a number less than 5)? 1) 1/3 2) 5/12 3) 2/3 4) 5/6 I think #2...can you check?

**Math Probability**

The probability of having a winning raffle ticket is 20%. If you bought 50 tickets, how many wining tickets should you expect to have? 1)3 tickets 2)8 tickets 3)10 tickets I think #3 Thanks

**Math Probability**

You roll a number cube 20 times. It lands on 2 five times. What is the experimental probability of rolling a 2? 1}40% 2)10% 3)25% 4)17% I think #3 Thanks

**math**

Which of the following is a certain event? 1) rolling a composite number on a number cube 2)rolling a number greater than 1 on a number cube 3)rolling an odd or even number on a number cube 4)rolling an odd or even number greater than 7 I think # 3 Thanks for your hrlp

**Science**

A kitchen ceiling light has five lightbulbs on it. When one of the lights goes out, the other four will stay lit. This is an example of a series circuit. True or False I think FALSE because a series circuit would make them all go out.

**Science**

Electric charges that are different? 1)attract each other 2)repel each other 3)exist in pairs 4)do not interact I think #1 Thanks

**Art**

Which of the following items is the best example of functional art? 1)stones 2)a vase 3)paper clip 4)rag I think #1 Thanks

**Health**

Thank you for the website, after reading it, I will go with the #1 answer. Like my book, it also says malnutrition, organ damage and total dependence on the drug.

**Health**

Which statement is true about stage 3 of alcoholism? 1)malnutrition and liver and brain damage often occur 2)Teenagers go through this stage very slowly 3)The drinker becomes totally dependent on the drug 4)The drinker begins trying to escape the everyday stressors. I think #1...

**English**

Thanks, but I did check the meaning of careening( swiftly and uncontrollable) but 3 of the answers were so close, I could not decide. I have changed my answer to #2 Thanks for being so nice.