Saturday

April 30, 2016
Total # Posts: 502

**chemistry **

The radius of a aluminum atom is 143 pm. How many aluminum atoms would have to be laid side by side to span a distance of 4.90 mm?
*September 21, 2013*

**chemistry**

are these two statements true? (a/b)^x = a^x - b^x and (x^a + x^a+b) / (1+x^b) = x^a
*September 15, 2013*

**Chemistry**

When 25.302 is divided by 56.743, the answer should be reported to ____ significant digit(s). The result of the division, 25.302 / 56.743, reported to the correct number of significant digits is _______ When 56.743 is subtracted from 25.302, the result should be reported with ...
*September 15, 2013*

**Algebra**

Find the coordinates of the vertex and determine whether the graph opens up or down. y=-x^2+x-5
*May 7, 2013*

**Statistics**

A certain lottery is won by selecting the correct four numbers from 1,2....30. The probability of winning if the rules are changed so that in addition to selecting the correct four numbers you must now select them in the same order as they are drawn?
*May 4, 2013*

**Physics**

Show that 480 W of power is expended by a weightlifter when lifting a 60-kg barbell a vertical distance of 1.2 m in a time interval of 1.5 s.
*April 23, 2013*

** Probability**

If I have a bag filed with 6 marbles, 2 blue marbles, and 4 yellow marbles, and I had to pick one from the bag, what is my sample space?
*April 16, 2013*

** Probability**

If I have a bag filed with 6 marbles, 2 blue marbles, and 4 yellow marbles, and I had to pick one from the bag, what is my sample space?
*April 16, 2013*

** Probability**

If I have a bag filed with 6 marbles, 2 blue marbles, and 4 yellow marbles, and I had to pick one from the bag, what is my sample space?
*April 16, 2013*

**Chemistry**

Calculate the volume of 1.0 M copper(II) sulfate solution required to completely react with 1.0 g of Fe(s) according to this equation: 2 Fe(s) + 3 Cu^2+ (aq) --> 2 Fe^3+ (aq) + 3 Cu (s). the copper in the reactant has a charge of 2+ and the iron in the product has a charge ...
*March 5, 2013*

**Anatomy and Physiology II**

1. Which answer below includes all the phases of respirations? A. Breathing, pulmonary ventilation, gas transport, and cellular respiration B. Pulmonary ventilation, external respiration, internal respiration, and gas transport C. Inhalation, external respiration, gas ...
*March 3, 2013*

**Anatomy and Physiology II**

A 45 year-old female has thyroid disease. Because specific prosperities of the thyroid gland classify it as an endocrine organ, you conclude that this disease is an endocrine disease. Which answer below best describes the properties that classify the thyroid as an endocrine ...
*March 3, 2013*

**math**

1.) $850 plus 8% on sales of $8,000 2.) $1,200 plus 4.5% on sales of $6,500 3.) You purchase 9 1/2 yards of fabric at $11.00 per yard. If there is a 7% salesb tax, what is the total cost of the fabric
*February 26, 2013*

**Principles of Management **

Riya, a manager, calls a meeting of her subordinates to tell them about the new benefits package.Riya is performing the _______role. A. Disseminator B. Monitor C. Spokeperson D. Negotiator My answer: A 2nd question: Namibia has a law that prohibits foreign companies from ...
*February 19, 2013*

**Math **

2/12x-3/12=8/12 A. x=5/2 B. x=11/2 C. x=11/12 d. x=11/6 My answer: B
*February 19, 2013*

**Anatomy and Physiology **

Which answer below includes all the phases of respiration? A.Beathing,pulmonary ventilation,gas transport, and cellular respiration B.Pulmonary ventilation, ecternal respiration, internal respiration,and gas transport C.Inhalations, ecternal respiration, gas transport, and ...
*February 18, 2013*

**Peinciples of Management **

a 31 year old female contracted HIV human immunodeficiency syndrome) Ordinarily harmless infections are deadly to her. Which answer below best explains how her antibody-response (b cell immunity) became weakened even though HIV primarily infects cells involved in T cell ...
*February 18, 2013*

**Medical Terminology **

Your boss expects you to stay late to cover the workload of a coworker who is out sick,but you are supposed to help your mother with some work on her house tonight. your are suffering from: 1. role overload 2. role conflict 3. role ambiguity 4. learned helplessness My answer: ...
*February 18, 2013*

**Biology**

Acrostic of the. Anaerobic
*February 17, 2013*

**chemistry**

oh ok
*February 10, 2013*

**chemistry**

thanks anyways
*February 10, 2013*

**chemistry**

you cant prove a thing!!!!!
*February 10, 2013*

**chemistry**

i dont know what you are talking about.
*February 10, 2013*

**chemistry**

Which of the following is not an example of a science? geology astronomy astrology ecology
*February 10, 2013*

**Science**

Sarah heated two cubes of aluminum to 50 degrees celsius. Cube B has a volume of two cubic centimeters. If the cubes do not touch each other, which of these statements is true? A. Cube A has a higher temperature than cube B. B. Cube B has a higher temperature than cube A C. ...
*February 5, 2013*

**health**

Milk
*February 1, 2013*

**psychology**

how has the definition of social faciliation evolved over time
*January 18, 2013*

**math**

zoomer bix plans to but a microcomputer that costs $690, excluding sales tax. if the sales tax rate is 5 1/2% how much tax will zoomer have to pay
*January 10, 2013*

**math**

3 - 2 x _____ = 1 ? please explain how to answer
*December 13, 2012*

**math**

x+3+7=5(x-4) solve for x?
*December 13, 2012*

**CHEMISTRY**

Use the Nernst equation and data from Appendix D to calculate Ecell for each of the following cells. Enter your answer with 3 significant digits. Enter scientific notation as 1.23E4. (a) Mn(s) | Mn2+(0.11) M || Cr3+(0.24 M), Cr2+(0.11 M) | Pt(s) ____________ (b) Mg(s) | Mg2+(0...
*November 30, 2012*

**CHEMISTRY**

cell diagram:H2(g,1atm) Pt Enter part(a), (c) with 2 siginificant digits and part(b) with 3 siginificant digits. Enter scientific notation as 1.23E4. (a) What is Ecell if the unknown solution in the half-cell on the left has pH = 4.94? ____________ (b) What is Ecell if the ...
*November 30, 2012*

**CHEMISTRY**

Suppose that you have 0.500 L of each of the following solutions, and an unlimited supply of water. (Note: C9H7NHBr is a salt containing the ions C9H7NH+ and Br− and C9H7N is quinoline, an organic base with pKb = 6.24 at 298 K. If you like, you may represent C9H7NH+ as ...
*November 27, 2012*

**CHEMISTRY**

Ethylamine, CH3CH2NH2, is an organic base with pKb = 3.367 at 298 K. In an experiment, a 40.0 mL sample of 0.105 mol L-1 CH3CH2NH2 (aq) is titrated with 0.150 mol L-1 HI(aq) solution at 298 K. (a) Write a balanced chemical equation for the neutralization reaction upon which ...
*November 27, 2012*

**CHEMISTRY**

The half-cell, Tl | Tl+(1 mol L-1), is connected to a Pt | H+ | H2(1 atm) half-cell in which the concentration of H+ is unknown. The measured cell voltage is 0.0841 V and the Pt | H2 | H+ half-cell is the cathode. Standard reduction potentials are given on the next page. (a) ...
*November 27, 2012*

**social studies**

Which of the following nineteenth-century inventors is associated with Menlo Park in New Jersey a.Gustavus F. Swift b.Cyrus W. Field c.Alexander Graham Bell d.Thomas Alva Edison
*November 23, 2012*

**social studies**

If you were a reform-minded person who, above all, loathed the social problems associated with alcohol, you would have been especially sympathetic to the
*November 23, 2012*

**Physics**

To find the KE of the ball at the highest ball of motion, we have to use the initial velocity and angle to find the horizontal velocity. V(horizontal) = V(initial) * cos(theta) V(horizontal) = (57 m/s) * cos(10.2) V(horizontal) = 56.099 m/s Using the velocity in the horizontal...
*November 16, 2012*

**Physics**

A speed skater moving across frictionless ice at 9.0 hits a 5.1 -wide patch of rough ice. She slows steadily, then continues on at 6.4 . What is her acceleration on the rough ice?
*October 8, 2012*

**advanced algebra**

ms. driva reck drove from her home to a service station at 48 km/h. she returned home by bike at 16 km/h. the entire trip took 4 hours. How far was the service station from ms. reck's home?
*October 4, 2012*

**3rd grade Math**

2468101214161820222426283032343638404244464850525456586062646668707274767880828486889092949698100
*October 2, 2012*

**Physics**

120N
*September 26, 2012*

**chemistry**

Which of the following elements is synthetic? uranium iodine helium nobelium
*September 25, 2012*

**chemistry**

How many electrons are in the outermost principal energy level of an atom of nitrogen in the ground state?
*September 25, 2012*

**MEDICAL RECORD**

WHAT IS THE PROCESS FOR HANDLING CLINICAL DAT THAT A DOCTOR NEEDS TO SEE AND WHAT IS THE PROCESS FOR HANDLING ADMINISTRATIVE DATA THAT A DOCTOR DOES NOT NEED TO SEE
*August 31, 2012*

**maths**

Can someone help please? A circular opaque disk, 25 cm in diameter, is set up 30 cm from a circular source of light of diameter 40 cm. A screen is placed 30 cm beyond the opaque disk. Describe, giving dimensions, the nature of the shadow on the screen
*August 27, 2012*

**maths**

i have worked out the diameter of the umbra to be 25 cm, is this correct?....
*August 27, 2012*

**maths**

please help A circular opaque disk, 25 cm in diameter, is set up 30 cm from a circular source of light of diameter 40 cm. A screen is placed 30 cm beyond the opaque disk. Describe, giving dimensions, the nature of the shadow on the screen
*August 27, 2012*

**math**

a circular opaque disk, 25 cm in diameter, is set up 30 cm from a circular source of light of diameter 40 cm. Ascreen is placed 30 cm beyond the opaque disk. Describe, giving dimensions, the nature of the shadow on the screen. Ok, I have drawn a sketch and can say that the ...
*August 27, 2012*

**math**

thanks for your help
*August 27, 2012*

**math**

Need help..... A child of height 1.2 metres stands 3 metres from the foot of a lamp post of height 2.8 metres, at the top of which there is a small source which can be considered as a point. What is the length of the shadow cast by the child upon the ground?
*August 27, 2012*

**physics-please help**

could i have a clue or a starting point please?
*August 27, 2012*

**physics-please help**

can someone help? i am really struggling
*August 27, 2012*

**physics-please help**

is it D/5.8= 1.2/2.8 D= (5.8x1.2)/2.8 D= 2.48m ??
*August 27, 2012*

**physics-please help**

A child of height 1.2 metres stands 3 metres from the foot of a lamp post of height 2.8 metres, at the top of which there is a small source which can be considered as a point. What is the length of the shadow cast by the child upon the ground?
*August 27, 2012*

**following previous question**

thank you
*August 27, 2012*

**following previous question**

would what the nature of the shadow on the floor be if the point of source of light is replaced by a luminous disc of diameter 5 cm, whose centre lies directly above the centre of the card?
*August 27, 2012*

**OPTICS/PHYSICS-REALLY DO NOT UNDERSTAND THIS!**

thank you what would the dimension of shadow be?
*August 27, 2012*

**OPTICS/PHYSICS-REALLY DO NOT UNDERSTAND THIS!**

thank you would what the nature of the shadow be if the point of source of light is replaced by a luminous disc of diameter 5 cm, whose centre lies directly above the centre of the card?
*August 27, 2012*

**OPTICS/PHYSICS-REALLY DO NOT UNDERSTAND THIS!**

WHAT DOES PI STAND FOR?
*August 27, 2012*

**OPTICS/PHYSICS-REALLY DO NOT UNDERSTAND THIS!**

THANK YOU!
*August 27, 2012*

**OPTICS/PHYSICS-REALLY DO NOT UNDERSTAND THIS!**

A POINT SOURCE OF LIGHT IS PLACED 50 CM ABOVE A CIRCULAR CARD OF DIAMETER 5CM, THE SOURCE BEING DIRECTLY ABOVE THE CENTRE OF THE CARD. WHAT IS THE AREA OF THE SHADOW ON THE FLOOR 70 CM BELOW THE CARD?
*August 27, 2012*

**OPTICS**

PLEASE HELP! A POINT SOURCE OF LIGHT IS PLACED 50 CM ABOVE A CIRCULAR CARD OF DIAMETER 5CM, THE SOURCE BEING DIRECTLY ABOVE THE CENTRE OF THE CARD. WHAT IS THE AREA OF THE SHADOW ON THE FLOOR 70 CM BELOW THE CARD?
*August 27, 2012*

**maths/physics**

PLEASE HELP! A POINT SOURCE OF LIGHT IS PLACED 50 CM ABOVE A CIRCULAR CARD OF DIAMETER 5CM, THE SOURCE BEING DIRECTLY ABOVE THE CENTRE OF THE CARD. WHAT IS THE AREA OF THE SHADOW ON THE FLOOR 70 CM BELOW THE CARD?
*August 27, 2012*

**maths/physics**

PLEASE HELP! A POINT SOURCE OF LIGHT IS PLACED 50 CM ABOVE A CIRCULAR CARD OF DIAMETER 5CM, THE SOURCE BEING DIRECTLY ABOVE THE CENTRE OF THE CARD. WHAT IS THE AREA OF THE SHADOW ON THE FLOOR 70 CM BELOW THE CARD?
*August 26, 2012*

**science**

980
*July 28, 2012*

**nonfiction**

D. Know thyself
*July 24, 2012*

**chemistry please help me please!!!**

When one student did this experiment, he started with 19.5 mL of 0.118 M monoprotic acid. The endpoint was reached when 17 mL of base was added. What was the concentration of the base?
*July 9, 2012*

**Geometry**

AC and AE are common external tangents of circle G and circle D. FE = 26, GF = 5, and AG =13. What is the measure of AC?
*June 24, 2012*

**Language Arts**

Thanks
*May 17, 2012*

**Language Arts**

Who is Anmol? and I don't know
*May 17, 2012*

**Language Arts**

Seemingly virtuous; showing religiuos devotion P _ O _ S
*May 17, 2012*

**Language Arts**

uuummmm okay
*May 17, 2012*

**Language Arts**

Thanks...so you're who Ms.Sue was talking about?
*May 17, 2012*

**Language Arts**

Who is Anmol? and I don't know
*May 17, 2012*

**Language Arts**

Easy to manage or discipline D _ _ _ L _
*May 17, 2012*

**algebra**

factoring completely: 36x^2 + 60x +25
*May 15, 2012*

**6th Grade Math**

PLEASE HELP ME!!!!! I need to answer this equation: 9/2m-8=-5.5+4m I need it answer in a way like this: Ex: 9+5k=45+2k 0peration S 9 5k=36+2k S 2k 45+2k D 3 k=12
*May 7, 2012*

**statistics**

A professor informs her class that a test is very difficult, but the grades will be curved. Scores for the test are normally distributed with a mean of 25 and a standards deviation of 5. If she curves the grades by adding 50 to each grade, What is the new mean? What is the new...
*April 28, 2012*

**Math😒**

How do you find the answer to 3.4 - 0.972
*April 26, 2012*

**statistics**

Thank you.. It is 0.1008..
*April 24, 2012*

**statistics**

A history professor finds that when he schedules an office hour at the 1030 am time slot an average of 3 students arrive. Use the poisson distribution to find the probability that in a randomly selected office hour in the 1030 am time slot exactly 5 students will arrive.
*April 24, 2012*

**statistics **

A test has a mean of 104 and a standard deviation of 16. We want to be 98% certain that we are within 4 points of the true mean. Determine the sample size.
*April 23, 2012*

**statistics**

I thought that was it. It just seemed to easy. Thanks
*April 23, 2012*

**calculus**

malachi has three tvs of: 25",27",32". what the average size of malachi tvs?
*April 22, 2012*

**FLORIDA STUDIES WEEKLY**

WHATS THE ANSWER TO #7 DOWN
*April 15, 2012*

**Chemistry**

-1045
*April 9, 2012*

**statistics**

A person can order a new car with a choice of 9 possible colors, with or without ac, with or without heated seats, with it without anti lock breaks, with or without power windows and with or without a CD player. How many different ways can a new car be ordered with these ...
*March 25, 2012*

**Chemistry**

If a sugar cube measured 20cm by 20cm how much surface area would be exposed to the solvent(water)
*March 18, 2012*

**Living Environment(please check answers)**

ya mom
*March 12, 2012*

**math**

a map of the moon has a scale of 1cm:25km. On this map the diameter of the Copernicus crater is about 3.7 cm. To the nearest kilometer, what is the actual diameter of the crater?
*February 8, 2012*

**math**

express using a positive exponent: c^-5
*February 3, 2012*

**Physics (Mechanics)**

Marie shoots an arrow vertically upward at a sandhill crane. If the arrow travels to a maximum height of 99.5 meters, calculate how fast it was shot. And, for how much time was Marie's arrow in the air?
*January 28, 2012*

**com172**

Review the following passage and paraphrase it in the following box. Use the reference to create an appropriate APA-formatted in-text citation. Additionally, include one direct quotation. One of the most valuable skills a student can develop is focus. Focus is the ability to ...
*January 22, 2012*

**physics**

Calculate the speed (in m/s) of a skateboarder who accelerates from rest for 4 seconds down a ramp at an acceleration of 3 m/s2.
*December 23, 2011*

**Math**

i don't no
*December 19, 2011*

**Algebra**

I'm not sure how to get started! Please help! y=-2x^2-12x+2 Find the vertex, y intercept and x intercept
*December 5, 2011*

**English 10**

In the autobiographical selections "Hair" and "It Can't Be Helped," the authors describe how racial prejudice affected their early lives. Identify the key event described in each of the selections. Then explain how each author responded to the event at ...
*November 3, 2011*

**MAth grade 8**

i dont now wtf so get over it figer it out
*October 26, 2011*

**business math **

Is it more economical to buy an automobile for $29,000 cash or to pay $4,500 down and $3,000 at the end of each quarter for 2 years, if the money is worth 8% compounded quarterly? What is the cash equivalent savings by picking the better plan?
*September 28, 2011*