# Posts by emma

Total # Posts: 1,727

**physics**

What is the magnitude of the apparent weight of a 69 kg astronaut 5200 km from the center of the Earth's Moon in a space vehicle moving at constant velocity?

**physics**

A 2100 kg car rounds a curve of 67 m banked at an angle of 13. If the car is traveling at 105 km/h, will a friction force be required? If so, in what direction?

**11th grade physics**

A thin copper rod 1.0 m long has a mass of 50 grams. What is the minimum current in the rod that would allow it to "float" in a magnetic field of 0.1T?

**math**

4c+2=18

**chemistry**

What data would you need to evaluate the claim that a certain product neutralizes 47 times its weight in excess stomach acidity?

**4th grade**

what are the nouns in the sentence: Ryan will learn to swim this summer.

**history**

i know how to google

**history**

what was the battle of trafalgar?

**history**

what was the battle austerlitz?

**history**

what was napolean like in the north america?

**history**

how did napoleon declare himself emperor?

**history**

i know how to google, that's what i've been doing and i'm having no luck

**history**

you can edit it and change info on it, it's not reliable *i meant good not code

**history**

wikipedia isn't a code source

**history**

what was the napoleonic code?

**arithmetic**

what do you want?

**Physics**

Two men pull a 31-kg box with forces 9.7 N and 7.6 N. Find the resultant scceleration of the box.

**Physics**

A car mass of 1330 kg is traveling at 28.0 m/s. The driver applies the brakes to bring the car to a rest over a distance of 79.0 m. Calculate the retarding force.

**spelling**

go on dictionary . com (no spaces) it's really useful

**History**

i don't know, i mean, weren't all those people who died for the revolution? so if they didn't die, wouldn't it have gone a lot faster? and didn't they die for no real reason, i mean, they said one wrong thing and they weren't sent to be executed. did ...

**History**

was the Reign of Terror necessary to preserve the French Revolution?

**math**

the sum of the input and output equals 10, so it would be 10 for the output of 0

**Math**

find the greatest four-digit number that has exactly three positive factors.

**ap chem**

so is this correct: 3330000 grams CH4 0 grams O2 1770833 grams NH3

**ap chem**

Hydrogen cyanide is produced industrially from the reaction of gaseous ammonia, oxygen and methane: 2NH3(g) + 3O2(g) + 2CH4 -->2HCN + 6H2O(g) a)If 5.00 x 10^3 kg each of NH3 , O2, and CH4 are reacted what mass of HCN will be produced, assuming 100% yield? b)At the end of ...

**Chemistry**

The buoyant force on a balloon is equal to the mass of air it displaces. The gravitational force on the balloon is equal to the sum of the masses of the balloon, the gas it contains, and the balloonist. If the balloon and balloonist together weight 175 kg, what would the ...

**AP Chemistry**

HELP! We're currently studying gases but I don't even know where to start with this question.

**AP Chemistry**

The buoyant force on a balloon is equal to the mass of air it displaces. The gravitational force on the balloon is equal to the sum of the masses of the balloon, the gas it contains, and the balloonist. If the balloon and balloonist together weight 175 kg, what would the ...

**geometry**

140

**math**

659 x 1357=1357 x n n=

**math**

6+y=17

**algebra**

1/6h=9

**Math**

I don't get how you found the solution. Also I am the first one to post part b) and I don't get how to do it.

**Math**

When a concrete structure is built, an engineer often performs a slump test on the concrete to ensure that it is of suitable strength and consistency. The engineer fills a truncated cone with a bottom diameter 200mm, top diameter 100mm and height 300mm with concrete. The ...

**math problem**

When a concrete structure is built, an engineer often performs a slump test on the concrete to ensure that it is of suitable strength and consistency. The engineer fills a truncated cone with a bottom diameter 200mm, top diameter 100mm and height 300mm with concrete. The ...

**math-bobpursely**

Sorry bobpursely, but may I know what the E stands for in your formula? What is the Surface area of a glass bead that has the diameter of 11m? Express your answer to the nearest square mm. radius= .0055m radius^2= 5.5E-3 ^ 2=30.25 E-6m 4PIr^2= about 12*30.25E-6 m

**math**

What is the Surface area of a glass bead that has the diameter of 11m? Express your answer to the nearest square mm. A glass bead would be a sphere. So the formula for that is--> SA = 4ðr^2 = 4ð(5.5^2) = 380mm^2

**math problem**

When a concrete structure is built, an engineer often performs a slump test on the concrete to ensure that it is of suitable strength and consistency. The engineer fills a truncated cone with a bottom diameter 200mm, top diameter 100mm and height 300mm with concrete. The ...

**health**

what brings energy and oxygen into the body?

**math**

6r-3=15

**math**

7d+5=26

**physics**

A golfer takes three putts to get the ball into the hole. The first putt displaces the ball 15 ft north, the second 9.0 ft southeast, and the third 5.0 ft southwest. What displacement was needed to get the ball into the hole on the first putt?

**phsics**

so the magnitude will be the same and you have to add 180 degrees to the the original angle right..

**phsics**

I'm having some trouble with a question how do you find a vector that balances another one

**english**

Give 5 similaralities between spoken language and text/instant messaging

**math**

the length of a rectangle is 9in. greater than the width.the area 36in.2 find the dimensions

**math**

the length of a rectangle is 9in. greater than the width.the area 36in.2 find the dimensions

**Algebra**

you have to do long division i got x-9 as the answer

**physics**

An artillery shell is launched on a flat, horizontal field at an angle of α = 31.5° with respect to the horizontal and with an initial speed of v0 = 266 m/s. What is the horizontal distance covered by the shell after 9.44 s of flight?

**physic**

The velocity vector V1 has a magnitude of 3.0 m/s and is directed along the +x-axis. The velocity vector V2 has a magnitude of 2.0 m/s. The sum of the two is V3, so that V3 = V1+V2 true or false for each question The magnitude of V3 can be -3.0 m/s The x-component of V3 can be...

**6th grade social studies**

the culture of egypt and nubia began to mix when people and goods passed both egypt and nubia:)

**chemistry**

what happens when you cool biodiesel. petroleum-based diesel fuel, and vegetable oil?

**Biology**

Populations are frequently NOT in equilibrium due to selection or other evolutionary forces. Imagine a population of 100 individuals. Forty-nine of the individuals are homozygous dominant for beady-eye gene, 9 are heterozygous and 42 are homozygous recessive. NOTE: The ...

**physics**

The speed limit in a school zone is 38 km/h. A driver traveling at this speed sees a child run onto the road 16 m ahead of his car. He applies the brakes, and the car decelerates at a uniform rate of 8.5 m/s2. If the driver's reaction time is 0.55 s, What is the stopping ...

**English**

What is the proper name used when using improper words. ie rootin' tootin'?

**math**

"ThermoStar has been producing residential thermostats for over 50 years. Looking over the past 20 quarters (5 years) of the different product lines, the general manager has been trying to get a handle on sales, costs, and production, and has asked for your help. Your ...

**Statistics**

Car P(Sale) % Sold Per Sale/ Profit Per Sale VW Golf 10% 15% $1,000 Saab 10% 15% $2,000 BWM Z4 10% 20% $12,000 Skoda Octavia10% 10% $1,200 Lada Niva10% 40% $400 Sum 100% 2.1 What is the expected profit for a VW Golf? 2.2 What is the expected profit for a Saab? 2.3 What is the...

**american government**

there are five main principles that form the basis of rules that ensure our democratic government. discuss each and present an example that shows how our government is not obeying each principle

**Chemistry**

How were you able to get the 1.6?

**Chemistry**

Prepare a 0.0200 mM dye solution at low pH by dilution 0.40 ml of the stock 0.100 mM chemical X into the appropriate volume of 2.5 M HCl. What is the amount of HCL required for dilution, the final concentration of HCl in the solution, and the pH? I know there's the MV = MV...

**english**

what does being perfect mean?

**Career Studies**

Hi, I have to do a visual presentation on a current economic or social trend. I'm not allowed to use bristol board/posters or powerpoint/slideshows, because she wants us to be creative. What are some trends I could choose from, and what kind of presentation could I ...

**chemistry**

What is the purpose of removing all the precipitate from inside a beaker?

**chemistry**

What is the purpose of removing all the precipitate from inside a beaker?

**Chemistry**

What is the number of moles present in 24.0 mL of 0.500M solution of sodium chloride, NaCl? How many moles are there in 456 g of calcium fluoride, CaF2?

**chem can u check answer please**

I'm not ure that that is right... [H+] = -log(pH) however, we are given a pOH, not a pH. pH + pOH = 14 pH = 14 - pOH so 14 - 9.262 = pH pH = 4.738 [H+} = 10^-ph = 10^-4.738 [H+] = 1.8281 x 10^-5 M

**calc**

Three verticies of a parallelogram are D(2,1,3), E(-4,2,0) and F(6.-2,4). Find all possible locations of the fourth vertex.

**Pre Algebra**

Transversals?

**7th grade**

what is 1.4 to the 11th power

**english**

is this sentence clean she buyed some dounuts from the shop she boght some donuts from the shop.

**math**

3.75qt= qt c

**english**

does this sentence makes sens she flied over the mountaintop.

**Chemistry**

A battery is constructed based on the oxidation of magnesium and the reduction of Cu^2+. The initial concentrations of Mg^2+ and Cu^2+ are 1.2*10^-4M and 1.5M, respectively, in 1.0-L half-cells. The initial voltage of the battery is 2.83V with the standard voltage at 2.71V. ...

**english**

does this sentence make sesse. he ate a apple.

**college economics**

Suppose there are two goods. The demand for good 1 is q1=a-bp1+ep2 and the demand for good two is q2=a-bp2+ep1. a and b are strictly positive, |e|<b (1)Compute the optimal prices, and the Lerner index and inverse elasticity of demand for each good. (2)Now suppose the goods ...

**economics**

Suppose there are two goods. The demand for good 1 is q1=a-bp1+ep2 and the demand for good two is q2=a-bp2+ep1. a and b are strictly positive, |e|<b (1)Compute the optimal prices, and the Lerner index and inverse elasticity of demand for each good. (2)Now suppose the goods ...

**Chemistry**

A voltaic cell consists of a Pb /Pb^2+ half-cell and a Cu/Cu^2 half-cell at 298K. The initial concentrations of Pb^2+ and Cu^2 are 5.20×10−2 M and 1.40 M, respectively.

**english**

What changes have you seen in your lifetime with regard to people's attitude towards the environment?

**Chemistry Dipole Moments**

How do you tell which end of a polar bond is positive or negative? My book says that a molecule such as Hf has a center of positive charge a center of negative charge. But in S--O, how do you tell which end is positive, and which is negative.

**trig**

which of the following sets gives the x coordinates where the parabola y=x^2+4X-50 and the line y=7x-10 intersect when drawn in the coordinate plane

**trig**

which of the following sets gives the x coordinates where the parabola y=x^2+4X-50 and the line y=7x-10 intersect when drawn in the coordinate plane

**Reading**

Just gold eggs in a story that contain snakes, bees, and wolves.

**Reading**

Why would eggs containing terrible things, are so beautiful on the the outside and eggs containing beautiful things, are plain on the outside?

**Reading**

Who's point of view is it from, if it's not any of the character's point of view?

**Reading**

Why is magic important in folktales?

**science**

What is the storm on Jupiter?

**Chemistry**

it doesn't say :(. that's the problem word-for-word

**Chemistry**

.12M Lactic Acid (HC3H5O3, Ka=1.4x10^-4) is mixed with .10M NaC3H5O3 to form 1.00L solution. A. Calculate the pH of the solution after the addition of 50.0mL of 1.00M NaOH. B. Calculate the pH of the solution after the addition of 120.0mL of 1.00M NaOH.

**math**

X=10 so 10-8 would equal 2 and so y=2

**7th grade**

9.75 feet

**teasers**

i have streets but nopavemet i have cities but no bulidings i have rivers yet no water what am i

**math**

Which value of 'x' is the solution of the equation 2x/3 + x/6 = 5?

**math**

It takes Tammy 45 minutes to ride her bike 5 miles. At this rate, how long will it take her to ride 8 miles?

**psy 210 HHHEEEEEELLLLPPPPP PLEASE!!!**

hello, are u here

**Muffins and Teeth in your Ears**

Ear defenders are like ear muffs they are made of muffins which can help with helping you to stop you getting tooth in your ear drum (Fun Fact--- I did not just make that all up there really are teeth in your ear drums!)

**physics**

a basketball of mass 0.5 kg is dropped from restfrom a height of 1.34m.it rebounds to a height of 0.6m. how much mechanicalenergy was lost during the collision with the floor?

**math**

how do you solve 8-3x=the square root of 4xsquared+ the square root of 20 + 8

**Math**

If a diamond shape = 2/3 how do you draw 1/3, 1, 4/3, 2 thanks

**Geometry**

Hi, I don't have much time to turn this in. I think I got all the questions right, but I just want to be sure. I would appreciate some feedback! Thank you! 1. What is the formula for calculating the length of the diagonal of a right rectangular prism on the basis of the ...

**Enlish or grammar**

What is the tthe difference between General information and Specific information?