# Posts by mercedes

Total # Posts: 88

**Math**

How can I succeed in my positive and negative unit?

**Math**

a plane traveling at 400 mph leaves the philadelphia airport at 1pm heading due east. two hours later a second plane traveling at 600 mph leaves the airport heading in the same direction. at what time does the second plane overtake the first?

**geometry**

A 6ft tall man casts a 10ft shadow next to his 4ft tall daughter how long is her shadow ? I Don't Get The Question

**mechanics**

find the tension in the chord of a 50 lbs mass hang on the angles 25 degrees.

**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, ...

**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)? ...

**SCIENCE**

Thank you 100%

**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

**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?

**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?

**math**

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

**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

**Finance**

. 1% b. 0 c. 10.6% d. –0.1%

**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.

**math**

3200000*0.064 in scientific notation

**Physical science/football/algebra**

ok thanks and yes i do

**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

**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

**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

**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 you answer in meters per second.

**Math**

sorry if you were looking for an explanation from the other person.

**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!

**square roots**

oh thank you very much your a lifesaver!

**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!

**chemistry**

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

**Science**

How does respiratory and cardiovascular system obtain nutrients?

**science**

plant like which are called_______

**algebra**

whom should to see at the bank if you need to borrow money?

**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).

**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?

**physics**

Please Help me its really important i know.

**physics**

what is m and g?

**physics**

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

**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?

**physics**

what number goes into M and d?

**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)

**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?

**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 ...

**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 ...

**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?

**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?

**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-...

**Macroeconomics,**

Having a strong or a weak dollar, which is better for America? Why?

**Macroeconomics,**

what should the obama administration do about it.

**Macroeconomics,**

Is NAFTA good/bad for American? What should the Obama Administration do about it?

**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?

**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.

**Calculus**

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

**math**

then put the x axis on the bottom and the y axis on the top of a fraction if you need reduce

**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.

**English**

That doesn't quite make sense I don't know why Mom asked should be underlined?

**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!

**Math**

Solve the following equation by factoring: 6(p^2-1)=5p

**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...

**sat essay**

thank you so much!

**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 ...

**sat**

but i only have 25 minutes to write the essay

**sat**

if i don't finish my essay, how many scores will i get?

**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. ...

**SAT essay**

do you mean that my example can't support my thesis?

**SAT essay**

is it neccessary to write more than 1 example?

**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 ...

**Grammar**

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

**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)

**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)

**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 ...

**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 ...

**earth scince**

earth scince

**Algebra**

What Might You Have If You Don't Feel Well?

**AP Human Geography**

explain why economic sucess and political power are closely linked? What role does colonization play in the establishment of todays state?

**MAT116- Algebra 1A**

7-6x>1-5x

**math**

The minute hand is pointing to the 12. The hour hand is perpendicular to the minute hand. What 2 times could it be?

**fair project**

what happen when metal, cloth and wood get exposed to fire

**Science**

What happen when metal, wood and cloth are exposed to fire

**algebra 1b**

2 - 6

**Poetry**

Just get rid of words you don't need or that are insignificant, keep key words. Say you have a 500 word piece, get it down to 400, 300, 200 etc. Then put it into stanzas and break up into lines.

**math**

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

**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...

**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&#...

**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.

**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 ...

**Algebra**

i need help with my algedra homework can you please help me

**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 ...

**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...

**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 ...

**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 ...

**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...

**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.

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