Thursday
October 2, 2014

Posts by Mercedes


Total # Posts: 82

Physics
A small plane moving at 207km/hr flying 50.0m above the ground chases a convertible moving at 105km/hr down a straight highway. The plane has a package to drop in the car’s back seat. Assuming the vehicles maintain their speed and altitude and there is no air resistance, ...
September 18, 2014

Physics
A tennis player stands 15.0m from the net. They hit a ball from a height of 2.50m above the ground so that initially it has a horizontal velocity directed parallel to the ground toward the net. What speed does the ball have to have to just clear the net (which is 0.9m high)? ...
September 18, 2014

physics
An old battery with an emf of 9.0 V has a terminal voltage of 7.8 V when it is supplying a current of 1.5 mA. What is the internal resistance of the battery? 800 Ω 900 Ω 400 Ω 600 Ω
February 24, 2014

physics
An old battery with an emf of 9.0 V has a terminal voltage of 7.8 V when it is supplying a current of 1.5 mA. What is the internal resistance of the battery?
February 24, 2014

math
the function f is defined: f(x)= x+3 if -2<=x<1 9 if x=1 -x+2 if x>1 a. find the domain b. locate the intercepts I am totally lost, can someone please help me with this?
March 26, 2013

math
its the same steps just a different function in my textbook, but I don't understand it!
March 12, 2013

math
using the 7 steps outlined in sec 4.3 of your book,analyze the graph of the following function R(x)=x^3-125/x^2-49
March 12, 2013

Finance
. 1% b. 0 c. 10.6% d. –0.1%
November 27, 2012

physics
An electron moving to the right at 4.0% the speed of light enters a uniform electric field parallel to its direction of motion. If the electron is to be brought to rest in the space of 5.0 cm, determine what the strength of the field is.
July 17, 2012

math
3200000*0.064 in scientific notation
September 29, 2011

Physical science/football/algebra
ok thanks and yes i do
September 29, 2011

Physical science/football/algebra
suppose that Andrew is running down the field at 8 yards per second and then cuts right running 6 yards per second. He executes this maneuver in 0.5 seconds. Calculate his acceleration
September 29, 2011

Physical science/football/algebra
suppose that Andrew is running down the field at 8 yards per second and then cuts right running 6 yards per second. He executes this maneuver in 0.5 seconds. Calculate his acceleration
September 29, 2011

Physical science/football/algebra
suppose that Andrew is running down the field at 8 yards per second and then cuts right running 6 yards per second. He executes this maneuver in 0.5 seconds. Calculate his acceleration
September 29, 2011

physics
an empty coal car is moving along the tracks to a loading chute a 7km/hr., the mass of the empty car is 2000kg what is the speed of the loaded coal if the total mass of the car is now 10000 kg? give yuo answer in meters per second.
September 27, 2011

Math
sorry if you were looking for an explanation from the other person.
September 6, 2011

Math
136800000 divided by 250000000 it simple like a fraction 136800000 is the numerator and 250000000 is the denominator and to find a decimal you would divide the numer. by the denomin. and then to get a percent you multiply that decimal by 100 and round it!
September 6, 2011

square roots
oh thank you very much your a lifesaver!
September 6, 2011

square roots
i know this problem is really easy but i am having a brain freeze day will someone please help me figure out what the square root of 32 is? Please & thank you!
September 6, 2011

chemistry
When dissolved in 1000 g of water, which chemical compound will produce a solution with the greatest freezing point depression?
June 17, 2011

Science
How does respiratory and cardiovascular system obtain nutrients?
June 1, 2011

science
plant like which are called_______
March 2, 2011

algebra
whom should to see at the bank if you need to borrow money?
December 2, 2010

physics
Using Kepler's constant (9.84 X 10^-14), calculate the orbital radius of an artificial satellite whose period of revolution around the Earth is 1.43 X 10^4s(3.64 h).
November 7, 2010

physics
A force of friction of 3.2N acts on a 1.1kg puck while it is sliding along a horizontal surface. If the initial velocity of the puck was 7.5 m/s , how far will the puck travel before coming to rest?
November 7, 2010

physics
Please Help me its really important i know.
November 1, 2010

physics
what is m and g?
November 1, 2010

physics
A 50-kg astronaut experiences an acceleration of 5.0g (up) during liftoff. What is the astronaut's true weight and apparent weight?
November 1, 2010

physics
A satellite orbits Earth at a distance of 3rearth above Earth's surface. (Earth mass equals 5.97 X 10^24, earths equatorial radius equals 6.38 X 10^6) What is the magnitude of the gravitational acceleration of the satellite?
November 1, 2010

physics
what number goes into M and d?
November 1, 2010

physics
What would be the weight of 22.0kg dog at the equator on Saturn's surface? (Saturn's mass equals 5.69 X 10^26kg, Saturn's equatorial radius equals 6.03 X 10^7m, Earths mass equals 5.97 X 10^24)
November 1, 2010

Physics
A satellite orbits Earth at a distance of 3rearth above Earth's surface. (Earth mass equals 5.97 X 10^24, earths equatorial radius equals 6.38 X 10^6) How many Earth radii is the satellite form Earths center?
November 1, 2010

physics
Two blocks are tied together with a string as shown in the diagram.(There is a block on a horizontal incline, its mass is 1.0kg, there is a rope connecting that block to a pulley which then connects to another block that is 2.0kg. The angle of the incline is 30 degrees) If ...
October 22, 2010

Physics
Two blocks are tied together with a string as shown in the diagram.(There is a block on a horizontal incline, its mass is 1.0kg, there is a rope connecting that block to a pulley which then connects to another block that is 2.0kg. The angle of the incline is 30 degrees) If ...
October 22, 2010

physics
A 435 N box is sliding down a 40 degree incline. If the acceleration of the box is 0.250 m/s^2, what is the force of friction on the box?
October 21, 2010

Macroeconomics,
If nominal GDP is $300 billion and the money supply is $20 billion, What must be the velocity? (b)If the money supply decreases and the velocity does not change, what will happen to nominal GDP?
June 21, 2010

english
write a review of his theme, along with how this poem relate to your own life experience. I will arise and go now, and go Innisfree, And a small cabin build there, of clay and wattles made: Nine bean-rows will I have there, a hive for the honey-bee, And live alone in the bee-...
June 21, 2010

Macroeconomics,
Having a strong or a weak dollar, which is better for America? Why?
June 21, 2010

Macroeconomics,
what should the obama administration do about it.
June 21, 2010

Macroeconomics,
Is NAFTA good/bad for American? What should the Obama Administration do about it?
June 21, 2010

Macroeconomics,
If nominal GDP is $300 billion and the money supply is $20 billion, What must be the velocity? (b)If the money supply decreases and the velocity does not change, what will happen to nominal GDP?
June 21, 2010

Macroeconomics,
List and explain the three tools used by the Fed to manipulate the supply of money. In each case show how the money supply can increase/decrease.
June 21, 2010

Calculus
Find the area of the region that lies inside both curves. r = (3)^(1/2) cos (theta), r = sin (theta)
June 9, 2010

math
then put the x axis on the bottom and the y axis on the top of a fraction if you need reduce
May 24, 2010

math
we are studying this in class at black river today same problem popped up subtract the 10-0 which is the y axis then 0-7 which is the x axis.
May 24, 2010

English
That doesn't quite make sense I don't know why Mom asked should be underlined?
March 6, 2010

Healthcare
Where can I find information about Managed Health Care? I am also interested in its pros and cons. Also, where can I find information regarding Reforma de Salud de Puerto Rico? (Puerto Rico Health Reform) (Besides Wikipedia...) I would greatly appreciate any help! Thank you!
February 17, 2010

Math
Solve the following equation by factoring: 6(p^2-1)=5p
January 27, 2010

sat essay
Is it necessary for us to find new solutions to problems? Many people may argue that we don¡¯t need to since we are already able to solve the problems. As far as I am concerned, we should always try to find new solutions to problems. New solutions enable us to work...
December 2, 2009

sat essay
thank you so much!
November 21, 2009

sat essay
assignment:should people always prefer new things, ideas, or values to those of the past? Should people always prefer new thing to the old? Many people argue that we should not accept the new easily and should sick to the old. As far as I am concerned, we must always try our ...
November 21, 2009

sat
but i only have 25 minutes to write the essay
November 7, 2009

sat
if i don't finish my essay, how many scores will i get?
November 7, 2009

sat essay
Can any obstacle or disadvantage be turned into something good? Obstacles, which are the essential part of our lives, often seem to prevent us from reaching our goals and frustrate us. Therefore, most people think that difficulties are bound to exert negative influence on us. ...
November 5, 2009

SAT essay
do you mean that my example can't support my thesis?
November 4, 2009

SAT essay
is it neccessary to write more than 1 example?
November 4, 2009

SAT essay
Should people change their decisions when circumstances change, or is it best for them to stick with their original decisions? Environments, including the people around us, the values of society and the opinions of the majority, always exert influence on our decision. Some ...
November 4, 2009

Grammer
When saying "...he received a Bachelor of Science in Business Administration..." do I capitalize that or leave it un-capitalized?
October 19, 2009

Chemistry
How many moles of iodine are produced from 7.00 moles of chlorine, according to the equation shown? 3Cl2(g) + 2FeI2(s) --> 2FeCl3(s) + 2I2(g)
September 1, 2009

Chemistry
Usng the following balanced chemical equation, determine the limiting reactant in the reaction between 3.0 grams of titanium and 8.0 grams of chlorine gas? Ti(s) + 2Cl2(g) --> TiCl4(s)
September 1, 2009

Chemistry
A chemist is producing copper(II) chloride using the following reaction: Cu(s) + Cl2(g) --> CuCl2(s) In one reaction, the chemist uses 15.0 g of copper metal and 10.0 g of chlorine gas as reactants. When the reaction reaches completion, 16.0 g of copper(II) chloride has ...
September 1, 2009

CHEMISTRY
A chemist is producing copper(II) chloride using the following reaction: Cu(s) + Cl2(g) --> CuCl2(s) In one reaction, the chemist uses 15.0 g of copper metal and 10.0 g of chlorine gas as reactants. When the reaction reaches completion, 16.0 g of copper(II) chloride has ...
August 31, 2009

earth scince
earth scince
March 15, 2009

Algebra
What Might You Have If You Don't Feel Well?
December 17, 2008

AP Human Geography
explain why economic sucess and political power are closely linked? What role does colonization play in the establishment of todays state?
December 11, 2008

MAT116- Algebra 1A
7-6x>1-5x
May 25, 2008

math
The minute hand is pointing to the 12. The hour hand is perpendicular to the minute hand. What 2 times could it be?
May 20, 2008

fair project
what happen when metal, cloth and wood get exposed to fire
February 14, 2008

Science
What happen when metal, wood and cloth are exposed to fire
February 13, 2008

algebra 1b
2 - 6
January 24, 2008

math
Those are current liabilities. If you haven't talked about current and long term liabilities yet, then the answer is just liabilites.
November 8, 2007

math
To find out what your investment would be in 3 years, you must find the interest for year one and add it to the principle to find the interest for year two and so on. Which means your interest earns interest for you. Principle x Rate=Interest Year 1: 12,000 x .09 =1080 Year 2...
November 8, 2007

yh8hy
Dear Juan, energy from the sun is important because it heats the water molecules which causes them to evaporate. Evaporation is when the water turns into a gas which is a part of the water cycle. After the gas cools it turns into condensation, or liquid water again. The sun&#...
November 8, 2007

Biology
Hi Dannie, 1. In order for a cell to reproduce it must copy its DNA to pass on its genetic information. 2.DNA replication is the process of duplicating the DNA to make 2 identical copies. 3.The first step of DNA replication is the separation of the 2 DNA strands.
November 8, 2007

Accounting
A piece of equipment is purchased on May 1, 2007 for $80,000 and has a residual value of $5,000. The equipment's useful life is 8 years or 12,500 hours. It is used 2,700 hours in 2007, and 2,600 in 2008. The question is what is the book value on December 31, 2009 if I use ...
November 8, 2007

Algebra
i need help with my algedra homework can you please help me
September 5, 2007

Chem
A Texas Aggie buys 12 cans of dehydrated water. The cans weigh an average of 63.46g each before the dehydrated water is removed. If the density of pure distilled water is 0.9979 g/mL and each can has a volume of 3.154L, what is the total mass of the cans AFTER the removal of ...
February 28, 2007

Chemistry
Explain what happens when you add sodium chloride to boiling water. I know that when sodium chloride is added to water, the boiling point of water increases. What happens when it is added to already boiling water? I know it increases the temperature, I just don't know why...
January 31, 2007

Chemistry
Using the principles of bond breaking and bond making, how can I explain why there is no change in temperature in phase changes? In a phase change, for example when boiling water is converted to steam, no O-H bonds are broken and none are made. Enough energy must be added to ...
January 31, 2007

Chemistry
Why are combustion reactions always exothermic? Is it just because it gives off heat? Thanks ahead of time Exothermic MEANS it gives off heat; therefore, I don't think that can be a reason. Think of wood burning. Magnesium strips burning. A wax cancle burning. Anything ...
January 30, 2007

Chemistry
Earlier I asked for a definition of non-volatile. Given the fact that it won't evaporate at all, does it mean that a non-volatile substance is stable in whatever state it is in at room temperature? Thanks again ahead of time Not necessarily. Non-volatile means it won't...
January 24, 2007

Macroeconomics
List and explain the three tools used by the Fed to manipulate the supply of money. In each case show how the money supply can increase/decrease.
October 11, 2006

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