Tuesday

October 6, 2015
Total # Posts: 908

**Math**

What is 4 to the power of 3 plus 3? I got 67.
*September 30, 2015*

**Chem**

Suppose the water sample has a relatively high percent of volatile solid material. How would this have affected the reported mass of: a. dissolved solids -- too high, too low, or unaffected? Explain. TDS will be unaffected b. total solids -- too high, too low, or unaffected? ...
*September 30, 2015*

**Chem**

Name the following binary compounds consisting of two nonmetals or a metalloid and a nonmetal. 1. AsH3= arsine 2. AsF5= arsenic pentafluoride 3. HCL= Hydrogen chloride is this right?
*September 29, 2015*

**Chemistry**

Hello! I really need help with this. Name the following salts according to the old -ic, -ous system and the stock system. a. CrS b. Cr2O3 c. CrI3 X 6H20 d. CuCl e. CuI2 f. CuBr2 x 4H20 g. HgCl2 h. Hg2Cl2 i. Fe (OH)3 I am totally lost. I don't know how to name these. I have...
*September 29, 2015*

**CHEMISTRY**

IS THIS RIGHT? Name the following binary acids: HF(aq) – Hydrofluoric Acid HCl (aq)– Hydrochloric Acaid H2Se(aq) – Hydroselenide Acid HBr(aq) – Hydrobromic Acid HI (aq)– Hydroiodic Acid H2Te (aq)- hydrotelluric acid
*September 29, 2015*

**chem**

name the following binary acids. is the name for K2S, potassium sulphide or potassium sulfide? and is the name for K2Te, potassium telluride?
*September 29, 2015*

**precalc**

3- l2x-4l is less than or equal to 1 are the values of x x is greater than or equal to 3 x is less than or equal to -3
*September 27, 2015*

**precalc**

i also need help with these two questions: 1/r=1/r1 +1/r2 solve for r1 and: f= G(mM/r^2); solve for m
*September 27, 2015*

**precalculus**

hello there! i wanted to check my answer. is: 2(x-y) / (radical x- radical y) = 2 radical x + 2 radical y? thanks so much for your help!
*September 27, 2015*

**Physics**

Determine the direction of frictional forces (left, right, up down) for the objects: 1) A cup resting on top of a car. The car is moving and accelerating to the right. Up - This one I'm not sure but I think up because the frictional force would have to go up to hold the ...
*September 16, 2015*

**science**

B. 12.14 + 3.400 + .7 = 16.24 but you only need 3 sig figs
*September 15, 2015*

**Physics**

A bicycle racer sprints near the end of a race to clinch a victory. The racer has an initial velocity of 10.3 m/s and accelerates at the rate of 0.370 m/s2 for 7.01 s. What is his final velocity? a) 12.9 m/s The racer continues at this velocity to the finish line. If he was ...
*September 15, 2015*

**PHYSICS**

25.58 m 4.4^2 x 25.2^2 = x^2 sqrt(x) = 25.58
*September 15, 2015*

**ap biology**

You should go to the second stop. If you only go to the first stop all the fluid won't expel and there will be a little bit left in the pipette tip. (You always go to the first stop when picking up fluid and always go to to second stop when expelling fluid)
*September 15, 2015*

**ap biology**

It withdraws the sample. The second stop ejects the tip.
*September 15, 2015*

**Math 104**

A belt connects two pulleys with radii 2 in and 4 in.. The velocity of point A on the belt is 25 ft/sec. What is the linear velocity and angular velocity for point B? What is the linear velocity and angular velocity for point C?
*September 15, 2015*

**algebra**

Suppose that the width of a certain rectangle is 1 inch more than one-fourth of its length. The perimeter of the rectangle is 32 inches. Find the length and width of the rectangle.
*September 8, 2015*

**math**

How many 2 1/4 feet long strips of ribbon can be cut from a ribbon that is 7 1/2 feet long
*September 4, 2015*

**life orientation**

assess the extent to which bad road use has a direct impact on the physical, emotional, social and economic aspects to the family, the community and the country.
*August 12, 2015*

**Setlhwane**

Maths lit,life science,agricultural science,geography.....can i qualify for law school with this high school subjects?
*July 14, 2015*

**Algebra**

PLEASE HURRY AND HELP ME!!
*June 7, 2015*

**Algebra**

what is (1.4*10^1)(8*10^4) in scientific notation?
*June 7, 2015*

**Algebra**

I have a few questions on my Pre- Algebra Pre- test. I am in 7th grade. Anyone willing to help me for a few questions for 5-10 minutes?
*June 7, 2015*

**History**

Thank you so much ! :)
*May 13, 2015*

**History **

1) Which of the following best describes Affirmative Action? a) It was a way to fight corruption within the US government. b) The actions taken to instill new anti immigration laws. c) Of solving economic and educational discrimination. d) Of solely solving educational needs ...
*May 13, 2015*

**History**

1) How was Nixon appeal to Middle America a strategized? a) He tried aggressively to gain the majority of his support for protesters and aimed his campaigns towards them. b) He highlighted the salient issues that plagued and concerned many less outspoken Americans and promised...
*May 13, 2015*

**History**

Thank you !
*May 12, 2015*

**History **

Why was Vietnam key to the US taming communism in Asia? a) None of these answers b) Vietnam and the US had strong economic ties that both countries allocated throughout other countries in Asia. c) Vietnam was a major supplier of rice into the United States. d) Vietnam had a ...
*May 12, 2015*

**History **

Why did Ho Chi Minh lead a resistance against France? a) He sought Vietnam’s independence. b) He wanted to control the country. c) He wanted more foreign influence and control other than France. d) He desired to keep French rulers in the Vietnam but demanded more economic...
*May 12, 2015*

**History**

thank you very much
*May 6, 2015*

**History**

I don't know what deterrence is.. And how could I explain it?
*May 6, 2015*

**History **

Think about how deterrence was used by President John F. Kennedy. Explain deterrence and compare two modern day countries with nuclear power and explain a situation where deterrence can be utilized against both countries to prevent war.
*May 6, 2015*

**Math **

what is the perimeter of a rectangle if L=3x+5 meters W=4x-3 meters?
*April 19, 2015*

**Math **

A construction crew wants to hoist a heavy beam so that it is standing up straight. They tie a rope to the beam, secure the base, and pull the rope through a pulley to raise one end of the beam from the ground. When the beam makes an angle of 40 degrees with the ground, the ...
*April 16, 2015*

**physics**

two blocks of each mass m=3.75kg are fastened to the ceiling of an elevator. If the elevator accelerates upward at 1.6m/s^2. Find the tension in T1 and T2 in each upper and lower rope
*March 11, 2015*

**finite math**

Suppose that a 4-digit pin number is to be formed with the digits in {0, 1, ,2 ,3 ,4 ,5, 6, 7, 8, 9}. What is the probability that the pin number contains at least 3 odd digits
*March 10, 2015*

**finite math**

After rolling a pair of fair, six-sided dice, what is the probability that the sum of the outcomes is at least 4 but less than 12? (Round your answer to the third decimal place)
*March 10, 2015*

**math **

a student in Greece discovers a poetry bowl that contains 28% of its original amount of c-14
*March 10, 2015*

**science**

A person brings a cup of hot tea which is 170 degrees F into a room that is 65 degrees F and places a metal spoon which is 65 degrees F into the hot tea What happens to the temp. of the hot tea,the spoon and the air in ten minutes?
*February 26, 2015*

**Algebra 2**

Realtors in a Florida community have found that the average price of a four bedroom house varies inversely with the distance that the house lies away from the beach. If, on average a four bedroom house located 2 miles from the beach cost $750,000, What is the average cost of ...
*February 22, 2015*

**English **

Could someone read my five sentence paragraph. Before I turn it in. Thank u. To prepare to host a party or an event. The first thing I would figure out the date and location. Then I would sat down and figure out a menu,the guest list,entertainment. I would also seek input and ...
*February 22, 2015*

**English **

Use a cliche in a sentence that you create. the sentence that I created is. My sister and I are so much a like that most people say we are " two peas in a pod". Did I do the sentence correctly
*February 21, 2015*

**English**

Can someone read my eight sentence paragraph. A high school diploma is very important to me. With a high school diploma I can show my children that your never to old to go back to school. Which will set a good example for my children to show them they need to follow their ...
*February 21, 2015*

**math**

I'm in grade 5 and I have a area and perimeter question. The area is 300mm2 and the width is 15mm, I need to know what the length is. Thanks for your time.:-)
*February 10, 2015*

**math**

srry. the question was I have a rectangular garden and I only have 24 meters of fence to go around it. so what is the largest area I can make the rectangular garden. thanks for your time and sorry for bothering! I just need help to figure this out.
*February 9, 2015*

**math**

the use format is: U:understand S:solve E:explain
*February 9, 2015*

**math**

how? im in grade 5 so I might not understand the language you use
*February 9, 2015*

**math**

I need it to be a rectangle
*February 9, 2015*

**math**

srry. the question was I have a rectangular garden and I only have 24 meters of fence to go around it. so what is the largest area I can make the rectangular garden. thanks for your time and sorry for bothering!
*February 9, 2015*

**math**

suppose im trying to build a rectangular garden but I only have 24 meters of fence to use. so what is the largest area I can make my rectangular garden? please help I don't get it! I have to use the USE format and I don't get the question can you just explain please?
*February 9, 2015*

**Medical**

Can some one please tell me all the: adjectives adverbs conjunctions nouns prepositions pronouns verbs - in this paragraph? please! Thank you. The patient was brought to the operating room and Bier block anesthesia was performed. The right upper extremity was prepped and ...
*February 2, 2015*

**MATH**

is 1 and 6/6 equal? and is 1/6 and 6/6 equal? i'm confused
*January 22, 2015*

**physics**

A daredevil decides to jump a canyon of width 12 m. To do so, he drives a motorcycle up an incline sloped at an angle of 14.2◦. The acceleration of gravity is 9.8 m/s2 . What minimum speed must he have in order to clear the canyon? Answer in units of m/s.
*January 8, 2015*

**calc - yet another**

If C is the curve y = x^2/2 + 1 from (0, 1) to (2, 3), then the line integral over C 3x ds = sorry for all the questions!
*December 7, 2014*

**calc**

If D is the solid region in the first octant bounded above by the paraboloid z = 1 − x2 − y2 and below by the xy-plane, the volume of D is: so i set this up integrating over dz dr dtheta and got pi/2 but the answer i spi/8
*December 7, 2014*

**calc**

4. Compute ∂z/∂r + ∂z/∂s if z = sin u cos v, u = (r + s)2, and v = (r − s)2.
*December 7, 2014*

**calc**

i figured this one out!
*December 7, 2014*

**calc**

3. If f(x, y)=5 − 4x3 + 8y2, find a unit vector ~u for which the directional derivative D~uf(1, 1) is zero. im not sure how to do this one
*December 7, 2014*

**calc**

ok so now i get that i did the integral wrong,. it should be 2e^t(sint+cost) but I get 2(e^pi -1) for sqrt2??
*December 7, 2014*

**calc**

I have another question (studying for finals, haha) Let ~r(t) = et cost ~i + et sin t~j be parametric equations of a curve C. Find the length of C from t = 0 to t = π. so the equation I am using is the integral from a to b (in thsi case 0 to pi) of the magnitude of r'...
*December 7, 2014*

**calc**

Give the equation of a plane containing the points (1, 0, 0) and (1, 2, 1) and parallel to the line whose equations are x = y, z = so i found n to be <0,1,2> then i used the equation n(r-ro) and got y-x+2z. the answer is x-y+2z =1. how do they get =1 and why is it x-y ...
*December 7, 2014*

**programming urgent**

so i have two arrays . I need to figure outh how to multiply each value of the first array by each value in the second array. how doy ou do thtisT? thanks
*December 6, 2014*

**phys**

virtual, upright, and diminished. I know this is the answer. Would someoen be able to explain why
*December 4, 2014*

**phys**

n object is placed 40 cm from a lens of focal length -10 cm. The image is virtual or real? inverted or upright? diminshed or enlarged?
*December 4, 2014*

**calc**

I get 618.6666 pi but it is wrong
*December 2, 2014*

**calc**

I have asked a couple questions about surface integrals but I was not able to fully understand what the person who answered was saying and/or their answer was not correct. If someone could please help me with this problem that would be great! evaluate the surface integral ...
*December 2, 2014*

**calc**

what is r ? the answer doesn't have r in it
*December 2, 2014*

**calc**

Evaluate the surface integral. double integral ydS S is the part of the paraboloid y = x2 + z2 that lies inside the cylinder x2 + z2 = 1
*December 2, 2014*

**Chemistry**

If 25.00 mL of 6.00 M HCl is transferred by pipet into a volumetric flask and diluted to 5.00 L, what is the molarity of the diluted HCl? a) 0.75 M b) 0.055 M c) 1.20 x 103 M d) 48.0 M e) 0.0300 M grams of solute/molar mass of solute/liters of solution?
*November 20, 2014*

**Science**

False
*November 10, 2014*

**Science**

Climate change studies suggest the worst impacts will be felt by the wealthiest people.
*November 10, 2014*

**Science**

The cost of renewable energy is currently about the same or less than traditional coal generated power.
*November 10, 2014*

**Science**

What is the central theme of the “As Cheap as Coal” portion in Section 8.1 of your text?
*November 10, 2014*

**Science**

Nuclear plants rely on a massive industrial infrastructure using fossil fuels. The answer can be found in Section 8.3 of your text.
*November 10, 2014*

**Science**

Which statement is true regarding nuclear energy?
*November 10, 2014*

**Rational Functions**

Write an equation for a rational function whose graph has the following properties: x-intercept of 3 y-intercept of -3 vertical asymptote of x=-2 horizontal asymptote of y=2
*October 6, 2014*

**Physics**

A 4.55 kg steel ball is dropped onto a copper plate from a height of 10.0 m. If the ball leaves a dent 2.80 mm deep in the plate, what is the average force exerted by the plate on the ball during the impact?
*October 3, 2014*

**reading**

What is an illustrated list?
*September 18, 2014*

**Business**

Which statement about Sarbanes-Oxley Act is true?
*September 11, 2014*

**statistics**

Let E and F be two events for which the probability of atleast one of them occurs is 3/4. what is the probability that neither E nor F occurs? The hint is to use Demorgan's laws
*September 10, 2014*

**algeba**

1/Q + 1/P = 1/B Solve for B. Can you tell me how to start this problem off?
*August 27, 2014*

**College Algebra**

A and B share a $21 pizza. B eats 2/3 as much as A. How much should they each pay. Hint: There is still some pizza left.
*August 27, 2014*

**Alegbra**

A & B Share a $21.00 pizza. B eats 2/3 the amount that A eats. How much should each person pay? There is some pizza left. I am thinking a+2/3b=$21.00 1 2/3 b =$21.00 b=$21.00divided by 1 2/3 b= 8.43 a= $12.57
*August 27, 2014*

**Algebra**

A phone company charges $30 per month for a long distance plan plus a charge of $.05 per minute. What would the monthly charge be for someone who talked two and a half hours?
*August 8, 2014*

**Math**

Financial aid students must pass 2/3 of their courses each term in order to continue their aid. If a student is taking 18 hours, how many hours must be passed?
*July 20, 2014*

**Math**

The entire can needs to be painted, including the top and bottom. If the diameter of the lid (x) is 5 cm, and the height of the can (y) is 9 cm, what is the approximate total surface area that will need to be painted?
*June 17, 2014*

**Physics**

Q: Japanese honeybees have a unique defensive mechanism against their natural predator, the giant hornet. When threatened by a hornet attacking the nest, worker bees will work together to surround the hornet, and then vibrate to create heat. If enough bees work together, the ...
*May 8, 2014*

**Chemistry**

You can purchase hydrochloric acid in a concentrated form that is 37.0 hcl by mass and has a density of 1.20g/mL. Describe how exactly you would prepare 2.85 L of 0.500 M HCL from the concentrated solution.
*May 7, 2014*

**chemistry**

I have two questions regarding enthalpy of reactions: 1.) Care must be taken when dissolving NaOH pellets in water because the temp. can rise dramatically. Taking NaOH as system, what can be deduced about the signs of the entropy of system and surroundings? Am I correct in ...
*May 2, 2014*

**Chemistry**

Based on the cell reaction: Zn(s)+Cu2+(aq)→Zn2+(aq)+Cu(s) Under standard conditions, what is the maximum electrical work, in joules, that the cell can accomplish if 55.0g of copper is plated out? Wmax=______ J
*April 14, 2014*

**Chemistry**

So I multiply Eu3+(aq)+e−→Eu2+(aq) by two so there is two e- in both half reactions. I also remember that I need to add H+ and OH- onto one or both sides depending if the reaction is acid or basic. How do I determine that?
*April 14, 2014*

**Chemistry**

Given the following half-reactions and associated standard reduction potentials: AuBr−4(aq)+3e−→Au(s)+4Br−(aq) E∘red=−0.858V Eu3+(aq)+e−→Eu2+(aq) E∘red=−0.43V IO−(aq)+H2O(l)+2e−→I−(aq)+2OH&#...
*April 14, 2014*

**Chemistry**

A voltaic cell utilizes the following reaction: 2Fe3+(aq)+H2(g)→2Fe2+(aq)+2H+(aq). What is the emf for this cell when [Fe3+]= 3.70M , PH2= 0.95atm , [Fe2+]= 7.0×10−4M , and the pH in both compartments is 4.05? Express your answer using two significant figures...
*April 14, 2014*

**World Civilization**

1. In 1789, the National Assembly revoked the privileges of the aristocracy. This occurred in reaction to A. a peasant uprising. B. Louis XVI's withdrawal of troops from Paris. C. discontent among the poor people of Paris. D. the storming of the Bastille 2. What was ...
*April 11, 2014*

**World History**

1 - B 2 - D 3 - B 4 - C 5 - B 6 - C 7 - C 8 - A 9 - D 10 - C 11 - C 12 - B 13 - D 14 - D 15 - B 16 - C 17 - A 18 - A 19 - C 20 - A
*April 11, 2014*

**World History**

1. In 1964, a loose union of Palestine refugees led to the formation of the Palestine Liberation Organization (PLO) under Yasir Arafat. What was the aim of the PLO? A. Driving Israel from East Jerusalem B. Establishing a Pan-Arab League C. Evicting Israel from Palestine D. ...
*April 11, 2014*

**Contrasting East & West**

1 - D 2 - D 3 - C 4 - A 5 - C 6 - B 7 - A 8 - B 9 - C 10 - C 11 - D 12 - D 13 - D 14 - A 15 - C 16 - D 17 - A 18 - B 19 - A 20 - B
*April 11, 2014*

**Contrasting East & West**

1. In 1938, British Prime Minister Chamberlain declared a final act of appeasement A. after Hitler attacked Poland. B. when Hitler's claim on the Sudetenland was accepted. C. immediately following the Nazi occupation of Austria. D. after Hitler's forces occupied the ...
*April 11, 2014*

**pen foster literacy**

When using the Internet as an information source what u should remember
*March 31, 2014*

**Chemistry**

Okay... I already know that. I plugged in all the numbers and I get 8.2*10^22, which is not the right answer. Can someone show the work for the problem please?
*March 25, 2014*