Wednesday
October 22, 2014

Posts by Dina


Total # Posts: 128

physic
As discussed in Example 4-7, the archerfish hunts by dislodging an unsuspecting insect from its resting place with a stream of water expelled from the fish's mouth. Suppose the archerfish squirts water with a speed of 1.4 m/s at an angle of 50.0° above the horizontal, ...
September 28, 2014

physics
You and a friend stand on a snow-covered roof. You both throw snowballs from an elevation of 18 m with the same initial speed of 11 m/s, but in different directions. You through your snowball downward, at 40° below the horizontal; your friend throws her snowball upward, at...
September 28, 2014

math
The amount of paint an electric paint sprayer applies varies directly with time. A sprayer is set to apply 0.5 gallon in 2.5 minutes. Write an equation that gives the amount P of paint as a function of the time T. How much paint is applied if the sprayer is operated for 20 ...
September 23, 2014

Algebra
What is the product of 9/x-1*7/x-3
July 21, 2014

Chemistry pH
What is the pH of 4.7 M CH3NH3Cl. mehyl-amine, CH3NH2, Kb = 4.4 × 10-4. Do I find Ka first then take the -log(Ka) to find the pH of 4.7M CH3NH3Cl? or do I need to make I.C.E. table?
April 22, 2014

Chemistry pH
What is the pH of a solution that contains 0.30 M HC2H3O2 and 0.95 M C2H3O2-? Use Ka = 1.8 × 10-5 for HC2H3O2.
April 22, 2014

chemistry
I am performing debromination of 1,2-diphenylethane. the reaction is a 1:1 ratio of moles. I have .41g of the dibromide compound and I need 1.25 equivalents of zinc. How many moles of zinc is that?
February 12, 2014

chemistry
What is the definition of an equivalent? a lab procedure requires 1.25 equivalents of zinc powder. How do I determine how much zinc that is?
February 12, 2014

Chemistry
Thank you. So it is w/v vs w/w that makes the difference
February 8, 2014

Chemistry
how many moles are in 4.6ml of 48% HBR? The 48% is by weight. I am not given the density this time.
February 8, 2014

Chemistry
I have .8ml of 35% by weight hydrogen peroxide. The hydrogen peroxide density is 1.14 g/ml. how many moles of hydrogen peroxide are there?
February 8, 2014

physical science
A car travels through a school zone at a speed of 36 m/s was the 45 mi/h speed limit exceeded? yes or no
January 9, 2014

math
12/25,1/50,11/20 .
November 18, 2013

algebra
Thank you so much Ms. Sue!
April 6, 2013

algebra
Thanks Jake, but the ans. to this problem is x=4/7, so the set up is... 3x-2/3x-4/3.
April 6, 2013

algebra
Thank you Ms.Sue, but could you please show me how you got 7/3x?
April 6, 2013

algebra
How do I solve this problem? 3x-2/3x=4/3
April 6, 2013

Probability
Consider a deck of 52 cards with the following characteristics: 13 red cards, numbered 1 through 13 13 blue cards, numbered 1 through 13 13 green cards, numbered 1 through 13 13 black cards, numbered 1 through 13 1. Describe the steps necessary to calculate the theoretical ...
October 13, 2012

science
how does the thinning of the ozone layer protect your health?
January 30, 2012

Precal
Given f(x) and g(x) below, find: (a) f + g (b) f – g (c) f*g (d) f/g Please show all of your work. f(x) = x + 5 g(x) = 5x^2+15x-3
January 4, 2012

trig
To the nearest degree, determine the measure of <X for each value of tan X if the tan X = 0.25
November 8, 2011

Math
A wooden block that is a rectangular prism is 12 inches long. Melinda cuts the wooden block along its length into 4 cubes. How long is each side of the cube?
November 4, 2011

math
suppose walmart stok is selling at 59 dollars a share and mattel stock is selling at 28 a share. amy waller has a maximum of 6000 dollars to invest. she wishes to purchase four times as many shares of walmart as of mattel. only whole shares of stock can be purchase. a. how ...
October 14, 2011

math
suppose walmart stock is selling at $59 a share and mattel stock is selling at $28 a share. Amy waller has a maximum of $6000 to invest. she wishes to purchase four times as many shares of walmart as of mattel. only whole shares of stock can be purchase. how many shares of ...
October 12, 2011

CHEM
SAPPHIRE AND DIAMOND RING ,STAMPED 14K S&S WHAT DOES THIS MEAN?
September 24, 2011

physics
What is the change in kinetic energy of a baseball as it accelerates from rest to 45.0 m/s? The mass of a baseball is 145 grams. answer in joules
March 7, 2011

geometry
an angle is equal to one-third its complement what is the angle?
January 25, 2011

social studies
Would it be A?
October 28, 2010

social studies
Treasury inflation protection bonds pay: fixed interest plus an adjustment for inflation. a return that exceeds twice the inflation rate. fixed interest that exceeds the rate of inflation. a rate that combines the unemployment and inflation indices.
October 28, 2010

social studies
I chose D, but dont know if im right.
October 27, 2010

social studies
To develop your self-confidence: learn to rely mostly on intuition. develop a base of knowledge for problem solving. use enough negative self-talk to appear humble. downplay acquiring a lot of facts.
October 27, 2010

social studies
Would it be A?
October 27, 2010

social studies
As a result of reengineering, work processes are: radically redesigned and simplified. turned over to outside companies. made much more complex. controlled by computer programs.
October 27, 2010

social studies
Please help!! I am debating between A and C.
October 26, 2010

social studies
A likely question (or request for information) that you'd probably hear during a behavioral interview would be: "Describe your worst behavioral traits." "Describe your best behavioral traits." "Explain to me how you handled a customer emergency.&...
October 26, 2010

social studies
thank you Ms. Sue :)
October 25, 2010

social studies
Oh I get it now...It's B :)
October 25, 2010

social studies
I dont understand the question, but I chose D. Am I right?
October 25, 2010

social studies
In an attempt to make a sound vocational choice, Jared studies the Occupational Outlook Handbook. He is practicing the strategy referred to as: seeking professional help. finding occupational facts. getting firsthand experience. matching your career to your lifestyle.
October 25, 2010

Physical science
A chair lift holding a 100 kg man rises 5 meters in height in 10 second time period. Ignore the weight of the chair and related machinery and answer the following: How much power is required, in Watts?
October 23, 2010

social studies
Thank you both!
October 23, 2010

social studies
If I understand the question right, I got this question right. I chose B. It is a behavior of a specific group.
October 23, 2010

social studies
Which of the following is the best example of a cultural norm? The average height of adults How much respect is given to older people The average year-round temperature The age of the civilization
October 23, 2010

social studies
thank you!
October 23, 2010

social studies
I chose B. Am I right?
October 23, 2010

social studies
Finding out what your boss expects of you relates to the theory of: leadership. goal setting. human relations. defense mechanisms.
October 23, 2010

social studies
I chose B. would I be right?
October 22, 2010

social studies
Groupthink is likely to occur when: anger within the group has been growing. the need arises for a group opinion. almost no conflict is expressed within the group. the group is composed of an even number of people.
October 22, 2010

social studies
thank you
October 22, 2010

social studies
Ichose D. Am I right?
October 22, 2010

social studies
In the hostile environment form of sexual harassment, the harassed person: does not get a fair hearing for the complaint. suffers from a job loss for having filed a complaint. suffers from a job loss for refusing to grant sexual favors. may not necessarily suffer a job loss.
October 22, 2010

business
thank you for you help!!
October 22, 2010

business
They all seem right to me, but my second choice would be A, because from what I understand they are restless. Am I right?
October 22, 2010

business
I chose C
October 22, 2010

business
A person with type A behavior: is always in a hurry. gets a heart attack at an early age. is impatient and angry. wants success at any price
October 22, 2010

chemistry
WTH did DrBob22 just say?
October 19, 2010

9th grade
???108
September 20, 2010

9th grade
Simplify the expression. 3 [ (15 - 3)^2 / 4] a. 36 b. 108 c. 18 d. 9
September 20, 2010

american government
Yes I agree I think B is correct. In the economic sphere, not the social sphere.
July 1, 2010

algebra
factor completely 25c^2-81
June 6, 2010

math
how zdo you find the endpoint of a segment?
May 27, 2010

Economic
The market for Good X can be depicted with the following demand and supply equations: Demand: P = 50 – 1/2Q Supply: P = 1/3Q Where P is price per unit and Q represents quantity in units. Policy makers plan on imposing a $1 per unit tax on this good. Question: ( Market for...
April 11, 2010

Economic
A Giffin good is not correctly described by which of the following? A)A Giffin good must be an inferior good. B)A Giffin good must be such that the income effect and the substitution effect move in opposite directions, and the income effect outweighs the substitution effect. C...
April 11, 2010

Economics
1. B) 2.I don't know.Can you explain to me?
April 11, 2010

Economics
Multiple choice 1. If the friend offers to pay you $1 five years from today, the net present value will: A)be higher than $1. B)depend upon the interest rate offered. C)be equal to zero since you don't have the dollar. D)not be important in understanding the time value of ...
April 11, 2010

Chemistry
How many grams of ice at -14.0 degree Centigrade can be completely converted to liquid at 13.7 degree Centigrade if the available heat for this process is 5.91×10^3 kJ? For ice, use a specific heat of 2.01J/(g.degree Centigrade}) and H2 = 6.01 kJ/mol. Express your answer...
April 3, 2010

Chemistry
Zinc metal reacts with hydrochloric acid according to the following balanced equation. Zn(s) + 2HCl(aq) --> ZnCl2(aq) + H2(g) When 0.114 g of Zn(s) is combined with enough HCl to make 51.1 mL of solution in a coffee-cup calorimeter, all of the zinc reacts, raising the ...
April 2, 2010

science please no websites
could you please give me an example of the following(types of friction) : -static -sliding And also: -friction -buoyant force -air resistance Thank You!
March 31, 2010

science please help
could you please give me an example of the following(types of friction) : -static -sliding And also: -friction -buoyant force -air resistance Thank You!
March 31, 2010

Science Please I NEED Help!!!!!!!!!!!!!!!!!!!!!!!!
Describe how the instantaneous speed of a car changes when the car is moving with constant speed , speeding up, and slowing down please answer as soon as possible
March 28, 2010

Science please i need help!!!!!!!!!!
how can two observers measure a different speed for the same moving object
March 28, 2010

science
how can two observers measure a different speed for the same moving object
March 28, 2010

geography
natural banks which are sometimes built up by a river along the edges of its channel are called: a.river bluffs b.river cliffs c.levees d.slip-off slopes
February 22, 2010

geography
a delta is a: a.wid river mouth where tides are experienced b.long narrow arm of the sea resulting from the submergence of a glaciated valley c.fan-shaped piece of land at the mouth of a river,resulting from deposition by the river d.funnel-shaped drowned river valley
February 22, 2010

geography
which of the following group of rocks can be easily dissolved in water? a,sandstone,granite and obsidian b.limestone,granite and basalt c.quartz,schitz and chalk d.limestone,chalk and sandstone
February 22, 2010

chemistry help!
Hello, I am having problem with two lab questions and was wondering if someone can help! 1. Calculate the percentage of the empty space in a face-centered cubic lattice, and show that it does not depend on the edge length of the unit cell ot on the size of the atoms in the ...
February 4, 2010

chemistry
Hello, I am having problem with two lab questions and was wondering if someone can help! 1. Calculate the percentage of the empty space in a face-centered cubic lattice, and show that it does not depend on the edge length of the unit cell ot on the size of the atoms in the ...
February 3, 2010

french
wow sorry about the many posts! My internet was just crazy
January 27, 2010

french
Can someone help me correct these phrases? Avant que j'ai choisi qu'école a laquelle... I wanted to say 'Before I chose the school where....'
January 27, 2010

french
Can someone help me correct these phrases? Avant que j'ai choisi qu'école a laquelle... I wanted to say 'Before I chose the school where....'
January 27, 2010

french
Can someone help me correct these phrases? Avant que j'ai choisi qu'école a laquelle... I wanted to say 'Before I chose the school where....'
January 27, 2010

french
Can someone help me correct these phrases? Avant que j'ai choisi qu'école a laquelle... I wanted to say 'Before I chose the school where....'
January 27, 2010

french
Can someone help me correct these phrases? Avant que j'ai choisi qu'école a laquelle... I wanted to say 'Before I chose the school where....'
January 27, 2010

chemistry
Can anyone help me with these Chemistry questions? I am trying to study for an upcoming test and its just not sinking in as well and I thought. This is Thermochem for a heads up: Suppose 33mL of 1.20M HCl is added to 42mL of a solution containing excess sodium hydroxide in a ...
December 3, 2009

chemistry
Wow, thank you so much! There is one more question,sorry><. 2. Why is a twofold excess of chloride added to precipitate the silver? The ionic product has to be more than constant in order for the particular compound to precipitate. In this lab, the exact concentration Ag...
November 12, 2009

chemistry
I think my older post was lost within the forum so I just reposted, sorry.
November 12, 2009

chemistry
I did post the procedure on the other post:)
November 12, 2009

chemistry
was hoping someone can help me check if these answers make sense for a silver copper alloy lab. 3. Why don’t you have to weigh the sodium chloride on a sensitive balance? This one I am not sure about, It is because an excess of NaCl is needed to make sure the solution ...
November 12, 2009

chemistry; Lab questions help=)
1. Find the mass of the alloy. Obtain a sample of dime and determine its mass on an analytical balance. 2. Dissolve the silver. Put the dime piece in a clean, 100-mL beaker and bring it over to the fume hood. Within the fume hood, carefully pour 10 mL of 6 M nitric acid over ...
November 12, 2009

chemistry; Lab questions help=)
was hoping someone can help me check if these answers make sense for a silver copper alloy lab. 3. Why don’t you have to weigh the sodium chloride on a sensitive balance? This one I am not sure about, It is because an excess of NaCl is needed to make sure the solution ...
November 12, 2009

elementary aed 201
Identify internal and/or external rewards that impact recruitment and retention of quality teachers. How do such rewards influence recruitment or retention? How might these rewards shift as new accountability-centered teacher reforms are proposed (such as merit pay and ...
June 30, 2009

Chem again sorry
A solution of sodium chloride in water has a vapor pressure of 18.3 torr at 25°C. What is the mole fraction of NaCl in this solution? __________ What would be the vapor pressure of this solution at 45°C? The vapor pressure of pure water is 23.8 torr at 25°C and 71....
November 30, 2008

Chemmmm =(
what about when u are comparing the same charge Be2+ Mg2+ or the same base element Fe2+ Fe3+
November 30, 2008

Chemmmm =(
Which ion in each of the following pairs would you expect to be more strongly hydrated? (a) Na+ or Mg2+ Why? thanks!!
November 30, 2008

chemistry
i dont understand how to compare the dual nature of light. i dont know what that means
November 6, 2008

chemistry
no they are not in my text
November 6, 2008

chemistry
can you please help me find sites on the internet?
November 6, 2008

chemistry
how can i compare the dual nature of light how can i describe the phenomena that can be explained only by the particle model of light. how can i empoly the quantum theory to assess the amount of energy that matter gains and loses how did Einstein utilize Plancks quantum ...
November 6, 2008

science
im not sure the question is find out when the first carbon data took place
October 20, 2008

science
when did the first carbon data take place
October 20, 2008

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