Saturday
September 20, 2014

Posts by timothy


Total # Posts: 91

Science
A hammer with a 500-g head exerts an average force of 810n on a nail speed as it drives the nail 4 mm into wall. What was the speed of the hammer head when it hit the nail?
September 10, 2014

Geometry
A tree on a 30 degree slope grows straight up. What are the measures of the greatest and smallest angles the tree makes with the hill?
September 2, 2014

math
Is 16.6 a rational number?
August 27, 2014

math
is the square root of 9 a rational number?
August 26, 2014

math
A Coast Guard ship patrols an area of 125 square miles. The area the ship patrols is a square. About how long is each side of the square? Round your answer to the nearest mile.
August 26, 2014

Economics
In relation to Economics, explain the difference between nominal data and real data? *if someone can help me understand this better, I would be greatful.
July 28, 2014

Physics 1
Two balls have the same size and mass. One is hollow, the other one is solid. How would you determine which is which without breaking them apart?
April 17, 2014

Physics 1
If you see an object rotating, is there necessarily net torque acting on it? Explain
April 17, 2014

physics
jabu phuses a cart that is of mass 5kg with a speed of 1m,s she suddenly increase the force acting on the cart to move 2m,s for a distance of 50m (a)calculate the force causing the cart to speed up
April 15, 2014

Chem
1) Which solution will have the lowest OH- A) Na2CO3 B) NaHCO3 C) NaCl D) NaHSO4 E) NH4Cl 2) Which solution will be the strongest base? A) Na2CO3 B) NaHCO3 C) NaCl D) NaHSO4 E) NH4Cl 3) Which aqueous solutions are acidic? A) Na2CO3 and NaHCO3 B) NaCl and NH4Cl C) NaHSO4 and ...
April 5, 2014

Physics
A knife thrower throws a knife toward a 300-g target that is sliding in her direction at a speed of 2.30 m/s on a horizontal frictionless surface. She throws a 22.5-g knife at the target with a speed of 39.5 m/s. The target is stopped by the impact and the knife passes through...
March 4, 2014

science
A dog (canis familiaris) and a coyote (canis latrans) will readiliy mate in captivity and their offspring are healthy and fully fertile. Are we justified in saying they are distinct species? What might this tell us about the history of dogs and coyotes?
January 21, 2014

Physics
A music is played causing 82 dB. A baby cries causing 72 dB annoying the people around him by 123.7 m. What is the sound intensity level?
December 11, 2013

Physics
A skydiver falls in air reaching terminal velocity, he shouts to his friend at 2000 Hz. His friend receives it at 2355 Hz, what is the divers speed?
December 11, 2013

Physics
A simple harmonic pendulum has a period of 3.19 s and initial speed of 2.12 m/s. Find the length.
December 11, 2013

Physics
A rocket is fired with 9.37 km/hr, find the maximum altitude. (no air resistance)
December 11, 2013

Physics
Two organ pipes are imitating a sound of 12 Hz, one of them is 12 m long. What is the length of the other pipe?
December 11, 2013

Computer
How do i write a ratio into excel
October 20, 2013

math
Will someone please help me solve this problem. Solve and Check 3x^2=2x=5
April 21, 2013

Physics
During a brown-out, the electric power company drops the voltage of the power line and the incandescent light bulbs in your house become dimmer. When this happens, the filaments in the bulbs operate at a lower than normal temperature, so a. their color is somewhat bluer than ...
January 30, 2013

Social Studies
Thank you .....I got it right...
January 11, 2013

Social Studies
How did Roosevelt’s response to German aggression toward Britain differ from his response to Japanese aggression toward China? I think it is C or D? A.He condemned the aggression toward China but not toward Britain. B.He condemned the aggression toward Britain but not ...
January 11, 2013

Math
3x – 7y < –21 how would I graph this? Please help.
December 13, 2012

PSYchology 220
D
December 9, 2012

Calc
if your questions are all involving the same subject, just post them under a single question
December 9, 2012

math
A kicker punts a football from 3 feet above the ground with an initial velocity of 47 feet per second. Write an equation that gives the height (in feet) of the football as a function of the time (in seconds) since it was punted. Find the height (in feet) of the football 2 ...
December 9, 2012

math
solve by completing the square x^2-3x=4 please show work
December 9, 2012

Math: Algebra 1
Thank you - 2 more :)
November 27, 2012

Math: Algebra 1
2. What is the solution of the system? 7x + 5y = 19 –7x – 2y = –16 A.) (2, 1) B.) (1, 2) C.) (7, 5) D.) (–7, –2) I think it is A.
November 27, 2012

Math: algebra 1
Thank you - can you check the other 2 that are submitted and not answered - thanks again
November 27, 2012

Math: algebra 1
6. In which quadrant does the solution of the system fall? y = x – 1 y = –3x – 5 A.) I B.) II C.) III D.) IV I think it is c.
November 27, 2012

Math: Algebra
1. Which method would be the simplest way to solve the system? 7x + 5y = 19 –7x – 2y = –16 A.) graphing B.) substitution C.) elimination D.) distributive I think it is C.
November 27, 2012

Math: algebra 1
3. Which method would be the simplest way to solve the system? y =1/2 x 2x + 3y = 28 A.) graphing B.) substitution C.) elimination D.) distributive I think it is B.
November 27, 2012

Science
Waht animals are in the Nile Delta? I already have crocodile & hippo. I need 1 more mammal, a type of fish, and an insect.
November 6, 2012

Chemistry
How many grams of KNO3 (molar mass = 101.103 g/mol) should be used to make 325.0 ml of 0.070 M solution?
November 5, 2012

math
45 divide by 9 + m x 3 = 23? Help??
October 10, 2012

Chemistry
A student reacted 5.33 grams of cobalt with oxygen gas and obtained 7.50 grams of cobalt oxide. Determine the empirical formula of this cobalt-oxygen compound based upon this experiment.
September 26, 2012

world geography
why are climates grouped by latitude?
September 1, 2012

Science(Chemistry)
HCL+Al=AlCl3+H2 What is the ionic equation,the spectator ions and the overall or net ionic equations?
August 18, 2012

Science(Chemistry)
Explain what would happen when bromine water is added to potassium iodide solution and what is its balanced chemical equation?
August 18, 2012

Science(Chemistry)
Mg+H2O=MgOH+H2 What is the ionic equation,the spectator ions and the overall or net ionic equations?
August 18, 2012

Science
ive got 2 questions: the star Vega is 25 lightyears away from us. if we sent a radio message to Vega, and another civilization on a planet circling that star answered us, in what year could we expect to hear a reply? why was it necessary to make radio telescopes so much bigger...
June 20, 2012

math
The probability that a voting-age adult in 2004 voted in the presidential election was 0.57. Five voting-age adults in 2004 were randomly selected. Find the probability that exactly 2 or the 5 adults voted in the presidential election.
May 12, 2012

Math
A bullet hole in the wall at height of 7'6 inches from the floor. Bullet passed thru wall at angle 34 degrees. If they assume that the gun was fired from a height 4' above the floor, how far away from the wall was it when it was fired? (nearest inch)
May 4, 2012

Math
Find the perimeter of a right triangle which has a side 7 in. long and the angle opposite to it measures 37 degrees.
May 4, 2012

Biology
What is the importance of embryo polarity during cleavage?
February 25, 2012

grammar
Which is the correct verbal usage of the following sentence? I let it there while I stood and applauded or I left it there while I stood and applauded?
January 24, 2012

Geomtry
Five fences meet at a point to form angles with measures x, 2x, 3x, 4x, and 5x around the point. Find the measure of each angle.
December 11, 2011

Spanish 8th grade
I have to put these in the past tense-Are they correct? 1. Tú hablas por teléfono. Tú habaste por teléfono. 2. Nosostros bailamos mucho los fines de semana. This would be the same in past tense, I think?? 3. Tú y yo cantamos los domingos. ...
November 16, 2011

Math
Find the present value needed to have $ 1.00 compounded quarterly for 5 years at 6% using the formula (a) 74 ¢ (b) 75 ¢ (c) 76 ¢ (d) 77 ¢ (e) 78 ¢
November 3, 2011

pyshics
A small rock moves in water, and the force exerted on it by the water is given by the equation Fd = kv, where k is a constant. The terminal speed of the rock is measured and found to be 2.0m/s. The rock is projected upward at an initial speed of 6.0m/s. You can ignore the ...
October 19, 2011

chemistry
Calculate the concentrations of all species present in a 0.32 M solution of ethylammonium chloride (C2H5NH3Cl).
October 16, 2011

math
simplify 5/7 - 1/2 (1/3+3/7)
September 19, 2011

technology
how can you protect your own eletronic siginture?
July 30, 2011

11 U chemistry
Predict the products of a reaction between solid beryllium chloride and solid potassium,write the products in a balanced chemical equation also indicate what type of reaction this is.
June 7, 2011

HSM 220
what are thre ways human resources help support the strategic goals of human service organizations?
March 8, 2011

geometry
Find, to the nearest tenth of a centimeter, the length of a diagonal of a square if the measure of one side is 8.0 centimeters.
March 1, 2011

math
f(x)=sin(e^(4x)) f'(x)=??
February 24, 2011

math
A 75ft diagnol brace on a bridge connects a support of the center of the bridge The horizontal distance that it spans is 15ft longer than the hieght that reaches on the side of the bridge.Find the horizontal and vertical distance spanned by this brace
February 14, 2011

physical
Does that give me a negative velocity?
February 5, 2011

physical
A boy throws a stone vertically up to a man standing at a heigt of 2 m above the boy. Of the stone is thrown up with a velocity of 7.0m s what is the velocity of the stone at the instant when it is caught by the man. A clear explaination is greatly appreciated
February 5, 2011

chemistry
Because like dissolves like. Oil is a nonpolar molecule which then is the same as sugar. They are both nonpolar.
November 25, 2010

4th grade
23*17
October 27, 2010

Chemistry
m=12grams Molar Mass= 180.18 V=.1L n= m/MM= 0.067 moles. Molarity= n/V= .067/.1= .67 M1V1=M2V2 => 0.67(.05)=M2(.5) Solve for M2 and you get .067 M= m/VMM : Molarty= mass/ Volume x Molar Mass so m= MVMM : mass= Molarity x Volume x Molar Mass m= .067(.1)(180.18)= 1.21 Just ...
September 29, 2010

Chemistry
Which of the following statements about boiling points are false: A. the boiling point of 0.1 m KF(aq) is lower than the boiling point of 0.1 m ethanol(aq) B. the boiling point of a 0.5 m aqueous solution of NaOH is the same as the boiling point of a 0.5 m aqueous solution of ...
September 8, 2010

math- Calculus
If lim x->6 f(x)g(x) exists, then the limit must be f(6)g(6). True or false? Explain why it's true or false. Help!
August 24, 2010

math
Thank you Ms. Sue
August 8, 2010

math
Ms. Sue I have read it and im confused on the +-8, im not sure if that is a plus sign or T, sorry for the confusion.
August 8, 2010

math
Ohh okay thank you for your help. So the anser is -8 correct?
August 8, 2010

math
Please help me I am confused on this math problem. solve. y/8-8/y=0 what are the solutions? Wouldn't they be 0?
August 8, 2010

Math
I think it would be 20 right?
August 8, 2010

government
A STUDY OF THE CAUSES OF THE AMERICAN REVOLUTION OF 1776 THE FRENCH REVOLUTION OF 1789 AND THE RUSSIAN REVOLUTION OF 1917 BEST DESCRIBES THE GENERAILIZATION THAT REVOLUTION IS MOST LIKELY TO OCCUR WHEN
July 26, 2010

math
what is the dividend to the following equation? /3 2/5=10
January 14, 2010

Accountant
It is stand accounting procedures, or GAAP, to make an adjusting entry to remove the current year’s principle from the long-term liabilities. This entry reduces the long-term liabilities and increases the current liabilities. You are the bookkeeper for Biker’s ...
January 1, 2010

Human resources
give me an example of intangible forms of organizational culture
December 9, 2009

Mathematics for Liberal Arts
Determine a casino's expected net income from a 24-hour period at a single roulette table if the casino's total overhead for the table is $50 per hour and if customers place a total of $7,000 on single-number bets, $4,000 on two-number bets, $4,000 on four-number bets...
November 20, 2009

9th grade
The equation to simply put words into numbers would be....."500x + 700x - 700 = 2100"..... Then if you solved for "x", you would get x=7/3. So the plane and jet will meet in 7/3 hours. If yoy add that to 12:00 PM being noon, you would get 2:20, so the plane...
November 16, 2009

math
A musician plans to perform 5 selections for a concert. If he can choose from 8 different pieces, how many ways can he arrange his program?
November 11, 2009

physics
What is an optical fibre? Briefly describe how they are used.
July 24, 2009

math
Divide. Express answer in simplest form. 3 2/3 / 4 1/2
July 20, 2009

math
What is the greatest prime number you must consider to test whether 5141 is prime?
July 20, 2009

history
oh yea thank you so much i looked all over and i could never remember or find the name of them THANK YOU!!!!!!!!!!
May 30, 2009

history
hi yea im knew to mall this help stuff so i was wonderin if anyone can help me 4 my class i have to do a ciggarette thing and i need to find out what these ciggarettes were called. the dlues i was given was it was a commercial and a builboard and it is a pic of a man with as ...
May 30, 2009

math
oh...... k thanks anyway
May 30, 2009

to divide Monomials
Thank you for this wonderful answere, haha no HW ftw
April 16, 2009

Trigonometry
Hello, everyone: I am working on finding the exact values of angles that are less common and are therefor not found easily on the Unit Circle (at least, they are not labeled). For example, the problem I am asking about is: 10) Find the exact values of the Sine, Cosine and ...
March 17, 2008

Trigonometry
Thank you very much for the assistance. I understand this perfectly. Have a good day. :)
February 25, 2008

Trigonometry
Hello all, In our math class, we are practicing the trigonometric identities (i.e., sin^2(x)+cos^2(x)=1 or cot(x)=cos(x)/sin(x). Now, we are working on proofs that two sides of an equation are equal (for example, sin(x)*csc(x)=1; sin(x)csc(x)=sin(x)/sin(x)=1; 1=1). I am not ...
February 25, 2008

Geometry true or false
I just needto check to see if i'm right... It would be false right? Is the statement below true or false? All triangles have three angles, or all squares have nine sides. True False
October 19, 2007

READING
I need help with one less letter than the previous word. (its in a sentence.) Please explain more about your assignment. Are you trying to make a new word from a previous word?
March 23, 2007

MATHS
ACTUALLY NOT A STUDENT BUT I HAVE THIS PROJECT WORK. TO RESEARCH ON HOW INTEGERS CAME TO EXISTENCE, BY COURTESY OF WHO THAT ONE IS ABLE TO TELL IF HE COMES ACROSS AN INTEGER. I'LL LIKE TO ALSO GET COMMENTS FROM LEARNED PEOPLE WHO HAD FACTS ABOUT INTEGERS. HOPE TO HEAR FROM...
March 16, 2007

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