Saturday
April 19, 2014

Posts by Derrick


Total # Posts: 151

Physics
How much work is done in lifting a 6kg object from the ground to a height of 4m? A 12n object is lifted 5m how much work is done How much work is done if a 5n object is lifted from the ground to a height of 8m? How much gravitational potential energy does the object gain?

Physics/electricity
In the Bohr model of the hydrogen atom, an electron in the 2nd excited state moves at a speed of 5.48X10^5 m/s in a circular path having a radius of 2.12X10^-10 m. What is the effective current associated with this orbiting electron?

Phsyics
A model rocket is launched at an angle of 80 degrees aboce the x axis, with a velocity of 30m/s. How high will the rocket be 5 seconds after launch? ROund your answer to the nearest tenth

Math
Factorization

Math
Algedra

Factorization
Z

maths
Two vertical poles, 3m and 7m long are on the same straight line with a point P on the ground. The shorter pole is 20m from P and the longer pole. The angle of elevation of the top T of the longer pole from the top R of the shorter one is 30degree, calculate i) /RT/ ii) the ho...

Dwamena Akenten SHS
A pole 25m long is placed against a vertical wall such that its lower end is 7m from the foot of the wall on the same horizontal ground. If the upper end of the pole is push down by 2m, calculate correct to 2 significant figure: 1) how much further away from the wall the lower...

Physics
A 10 m platform diver during his diving can increase his rotation rate from an initial rate of 0.8 rev/s to a maximum of 3.3 rev/s. If his initial moment of inertia was 10 kg·m2, what is his moment of inertia at his maximum rotation rate?

Physics
In a "Rotor-ride" at a carnival, people are rotated in a cylindrically walled "room." The radius of the room is 4.0 m, The coefficient of static friction is μ=0.13. What is the minimum rotation frequency such that the people will not slide down the wal...

Physics
Superman, who likes physics, dangles his watch from a thin piece of string while he is taking off from ground horizontally at a constant acceleration a. He notices that the string makes an angle of θ with respect to the vertical. After 18 seconds, his speed is v=116m/s. E...

math
60/12=5cents per inch. 5*23=Xcents

Physics
A 0.4kg ball, attached to the end of a horizontal cord, is rotated in a circle of radius 1.3 m on a frictionless horizontal surface. If the cord will break when the tension in it exceeds 65 N, what is the maximum rpm(revolution per minute) the ball can have? HELP?

Math
Suppose the modified quota is 7.47. Fill in the blanks, and round your answers to two decimal places. (a) Find the lower quota. (b) Find the upper quota. (c) Find the arithmetic mean of the lower and upper quotas. (d) Find the geometric mean of the lower and upper quotas. (e) ...

Math
Suppose the modified quota is 7.47. Fill in the blanks, and round your answers to two decimal places. (a) Find the lower quota. (b) Find the upper quota. (c) Find the arithmetic mean of the lower and upper quotas. (d) Find the geometric mean of the lower and upper quotas. (e) ...

Math
A rental car agency charges $50 plus .25 cents per mile to rent a car. How many miles can you drive for $400? How many miles can you drive for $300

math
how do you know when you have found all the factors of a numbers?

7th grade math help quick please
hey lily sup luv u girl

Science
If a mineral is 10g, how much oxygen is in the mineral.

science
What is the approximate charge difference between glutamic acid and acetic acid at pH 9.5?

biochemistry
What is the approximate charge difference between glutamic acid and acetic acid at pH 9.5?

Math
What is the value of the expression below? (3+2)x5-6(6/2) A.10 B.22 C.12 D.20 B?

Math
Answer 4(3+2)+2(16/4) A.88 B.44 C.32 D.28 D?

Math
What is the value of the expression 7(3x18-10) A.53 B.168 C.186 D.308 D?

Math
Which choice gives the correct order of operations needed to find the value of 4(6+3)-24 A.+,x,- B.x,+,- C.-,x,+ D.+,-,x A?

Order of Operations
Nevermind I got all the questions. A D D B

Order of Operations
The first one I think is actually B

Order of Operations
Which choice gives the correct order of operations needed to find the value of 4(6+3)-24? A.+,x,= B.x,+,- C.-,x,+ D.+,-,x A? What is the value of the expression 7(3x18-10)? A.53 B.168 C.186 D.308 D? Simplify 4(3+2)+2(16/4) A,88 B,44 C,32 D,28 A? Simplify 451+5x5 A.461 B.476 C....

Order of Operations
What does 8+6(7-4)/9 equal? is it 6

Order of Operations
Which choice gives the correct order of operations needed to find the value of the expression below? 6+7(5-2)/3 A.+,-,x,/ B.-,x,+,/ C.-,x,/,+ D./,x,-,+

Social Studies
Africa then? :)

Social Studies
40 North latitude and 160 west longitude Pacific Oceann? 23 North latitude 5 East longitude Sahara Desert? 10 South latitude and 76 west longitude Peru? 40 North latitude 135 East longitude sea of japan? 80 north latitude 140 west longitude artic ocean?

Social Studies
23 degrees north latitude 90 degrees west longitude Gulf of mexico?

Social Studies
Gulf of mexico

Social Studies
23 degrees north latitude 90 degrees west longitude china?

Social Studies
What is 22 degrees south latitude and 43 degrees west longitude? Rio de Janeino?

Social Studies
Hudson Bay?

Social Studies
Greenland?

Social Studies
What is located on 60 north latitude and 85 west longitude?

Social Studies
What is located on 80 north latitude and 140 west longitude?

math
Find a point P on curve y = x^3 such that the slope of the line passing through point P & (1,1) is 3/4.

chemistry
What is the pH of an aqueous solution of a weakly acidic drug that is 40% dissociated and has a pKa =4.7?

physics
An image on the screen of a 12 cm long pinhole camera is 7cm. How large is the original object, if it is located 36 cm in front of the pinhole?

physics
100 lumen of light are incident on an interface which has 25% reflectance. At a point 3cm into the new medium, the amount of transmitted light is measured as 50 lumen. What is the absorptance of the material per cm?

biochemistry
The degree of dissociation, alpha, of an acid, HA, is defined by the relationship: alpha= [(A-)/[(A-)+ (HA)]. Calculate the degree of dissociation for acetic acid (pK=4.76) at 0.1 M

chemistry
write the structural formula for the dipeptide formed when the carboxyl end of cysteine bonds to the amino end of valine

math
5 cards are drawn at random from a standard deck of playing cards. What is the probability that all are the same suit?

chemistry
2 questions please: The highest positive oxidation number that chlorine can exhibit an any compound is +7, whereas its most negative oxidation number is -1. Write the electron configuration of chlorine and explain why these are limiting oxidation numbers for chlorine. Indicate...

chemistry
Which of the following are redox reactions? (a) Ba(NO3)2 (aq) + H2SO4 (aq) -> BaSO4 (s) + 2 HNO3 (aq) (b) NH4NO2 (s) -> N2 (g) + 2 H2O (g) (c) CuO (s) + H2 (g) -> Cu (s) + H2O (L)

Chemistry
Pure water is added to 25.0 mL of a 1.00 M HCL solution. The new solution has a volume of 2.00 L. What is the pH of the new solution.

critical thinking
Homework Help: critical thinking Posted by long on Thursday, March 8, 2012 at 1:53pm. Read the scenario. Using the information provided in the references and lesson, arrive with your best possible solution. You are a squad leader in Sapper platoon, Special Troop Battalion, 3rd...

History
The first transcontinental road in the United States ran from New York City to where?

History
What event in the U.S. History took place at Appomattox Court House in Virginia?

Science
Which is the closest to the speed of sound in air? A. 7miles per hour B. 70miles per hour C. 700miles per hour D. 7000miles per hour C?

Math
Robert and his dad want to build a sandbox for his sister's birthday.They wanted it to be 4 feet wide and have an area of 28 square feet. What is the length of the sandbox? 7? Robert's dad decided to make the sandbox bigger by extending the length and width of the san...

Science
How does a periscope work when it has 2 mirrors and light? A.Lenses refract the light B.Light bends as it travels and mirrors bend the light more C.Light travels in a straight line and the mirrors reflect the light D.Lenses and mirrors reflect the light Reflect means to bounc...

Science Help
How does a periscope work when it has 2 mirrors and light? A.Lenses refract the light B.Light bends as it travels and mirrors bend the light more C.Light travels in a straight line and the mirrors reflect the light D.Lenses and mirrors reflect the light Reflect means to bounce...

Math
Robert and his dad want to build a sandbox for his sister's birthday.They wanted it to be 4 feet wide and have an area of 28 square feet. What is the length of the sandbox? 7? Robert's dad decided to make the sandbox bigger by extending the length and width of the sand...

Science
1.What is refraction? The bending of light as it passes through matter 2.What type of lens would you use to magnify your view of a butterfly? Concave 3.What is a sound wave? Sound waves are waves of energy moving through matter.Sound waves are vibrations of molecules,molecules...

Math
Mrs.Nelson bought 3 boxes of cereal for her 2 children. Each box contains 24 ounces of cereal and the children eat cereal every day. What information is needed to find the approximate number of days the cereal will last? A.The amount of time 2 the 2 children eat cereal each da...

Math
The table shows the number of lemons needed to make different numbers of pitchers of lemonade 24lemons 3pitchers 32lemons 4pitchers 56lemons 7 pitchers 96lemons 12pitchers What is the relationship between the number of pitchers and the number of lemons? A.Pitchers= Lemons -21 ...

Math
Can you help me with my math questions below?

Math
Norton has cycled 15 miles and has drunk 7 liters of water. Which is the most reasonable prediction of the number of liters of water he will drink by the time he has cycled 50 miles? A.17 B.23 C.31 D.65 C?

Math
I got #1 for number 3 is the answer $202? I multiplied 14 and 3 and 80 and 2 then I added the product and got 202

Math
* means to divide?

Math
Whats the 2 for on A = 2(11 * 8) and A = 2 (13 * 8) ?

Math
Allison's 11th birthday is just around the corner. Her parents are remodeling her bedroom for her birthday. They will replace her carpet and repaint her walls Allison's Room Height 8ft Width 11ft Length 13ft 1.Allison wants the top 1/2 of her walls painted pink and the...

Math
Yes

Math
8/12 I mean

Math
Max's pencil was 8/23ft and Ian's pencil was 6/12. How much loner is Max's pencil than Ian's? A.2/12 B.4/12 C.6/12 D.14/12 Is it A or C?

Social Studies
The Surpreme Court ruled that slaves were not citizens of the U.S. and had no rights. Answer:Dred Scott decision The number of slave states and free states was kept balanced when Missouri was allowed into the Untion as a slave state and Maine as a free state. Answer:Missouri C...

Math
Ok,Thanks cause I wasnt sure with them

Math
Carlos counted all of the tickets that were taken at a school carnival. Each time he counted 10 tickets, he placed a tally on the chart below. Adult 16 Child 18 Which number sentence could be used to find t, the total number of tickets he counted? A.(16+18)+10=t B.(16+18)-10=t...

Math
The table shows the times a train left Austin and arrived in San Antonio on 5 nights last week. Mon 6:30pm left 7:22pm arrived Tues 6:18pm left 7:10pm arrived Wed 6:45pm left 7:37pm arrived Thu 7:05pm left 7:57pm arrived Fri 6:28pm left 7:20pm arrived What is the relationship ...

Math
Mrs. Garcia's class is making a banner to hang in the school's display case. They started by sewing 7/8 of a yard of gold fabric at the top, 5/8 of a yard of black fabric in the center, and 7/8 of a yard of red fabric on the bottom of the banner. How many yards of fabr...

Civics
Which is not a subunit of the Department of Health and Human Services?

math
The perimeter of a rectangular field is 560m.The length of the field is an eigth third of this distance.Find the length of the field.Find the width of the field

Civics
reasonable

Programming
Write the pseudocode for a program to calculate the wages of a sales according to the following rules. The wage is calculated at a rate of 15% of sales. If the salesman has been with the company more than three years, he receives a loyalty bonus of 10% of his calculated wages.

Programming
Write the pseudocode for a program to calculate the wages of a sales according to the following rules. The wage is calculated at a rate of 15% of sales. If the salesman has been with the company more than three years, he receives a loyalty bonus of 10% of his calculated wages.

math
400

english
hi i really need some assitinance please help. The sentences in each word group below are coherent because they are linked by repetition of the same word, by synonyms, and by pronouns. Type the words that tie the sentences together in each group. Though he worked long hours, U...

science
What is the topography , climate and resources of mount vernon, new york 10550

science
How far away from the earth does acceleration due to gravity become 1% of its value at the earth's surface. Assume that the earth is a sphere of radius 638000000cm.

calculus
For what values of a and b that make the function f continuous everywhere. f(x)={(x^2-4)/(x-2) if x<2 ax^2-bx-18 if 2<x<3 10x-a+b if x>3

history
list and summarize the provisions of the 2 laws passed by the radical republicans to reduce the presidential power

vocab
I have much indignation about the light sentence given to the drunk driver who ran over my child. ...

Civics
B."I Have a Dream"

5 of 90 lotto equation formula
I had developed a formula which works but, not always.All you need is to get four current event.search on face book.

applied statistics
find u=(*)

Physics
A 3kg block is resting on a table with a coefficient of friction of 0.4. It is now pushed with a force of 15n. What is the acceleration of the book?

History
who was alleys with Britain during the war of 1812?

phy
on a.) it should be 1/2mV^2=1/2kx^2, however whenever I do this problem on my homework I get it wrong. Im not sure why.

Chemistry
Thank you very much sir for your assistance.

Chemistry
The 2 posts above can be erased.

Chemistry
Oh my, I only wanted to submit one post, so sorry about that.

Chemistry
What is needed for nuclear fusion to occur? pressure, a beta particle or high temperature? I think it's only high temperature and pressure needed.

Chemistry
Sorry I wasn't finished posting, I accidentally pressed enter and it ended up posting. I don't get how to solve the half-life qquestion. My other questions are... The half-life of a particular radioactibe isotope is 6 hours. What percent of the daughter isotope would b...

Chemistry
What is used to tell different isotopes of a particular element apart? A. the mass number B. the atomic number C. the number of protons D. the number of electrons A is the answer. After how many half-lives are there equal amounts of parent and daughter isotopes. A 1 B 2 C 3 D ...

Chemistry
Thank you very much sir for your assistance.

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