# Posts by kim

Total # Posts: 2,629

**Physics**

how many coulombs must be on one object for it to be repelled with a force of 6.0 N by a second charge of 2.0uC at a distance of 1.0 m?

**science**

Why is ozone can be describe as our friend

**Chemistry**

What is the variable x in the following hydrate formula NaCl xH2O if the mass of sodium chloride is 58g and the mass of the water is 36g

**Math - help please**

Problem: The rock group Loco Moco was scheduled for a concert at the Blaisdell Concert Hall. Because it was the concert highlight of the year, there was excitement in the air and people were eager to get tickets, which could only be purchased in person. Hours before tickets ...

**Algebra**

Problem: The rock group Loco Moco was scheduled for a concert at the Blaisdell Concert Hall. Because it was the concert highlight of the year, there was excitement in the air and people were eager to get tickets, which could only be purchased in person. Hours before tickets ...

**Physics**

Thank you!

**Physics**

A 7.25 μC and a -2.00 μC charge are placed 20 cm apart. Where can a third charge be placed so that it experiences no net force. Express your answer in cm. The answer is 22.12 from the online answer key, but how do you set this up?

**Physics**

A square 1 m on its side has charges on every corner. Calculate the electric field on the upper right corner of the square. Let the charge on each corner be 40 x10-9C. Do I use K(Q*4)/r^2=F Then F/(Q*4)=E K=8.99*10^9 Nm^2/C^2

**physics**

A square 1 m on its side has charges on every corner. Calculate the electric field on the upper right corner of the square. Let the charge on each corner be 40 x10-9C. Do I use K(Q*4)/r^2=F Then F/(Q*4)=E K=8.99*10^9 Nm^2/C^2

**math**

compare the future amounts(a)you would have if the money were invested at a simple interest and if it were invested with annual compounding. ( round your answers to the nearest cent.) $7,600 at 15% for 25yrs

**art 103**

thank you

**art 103**

can you give me examples or explain it to me more

**art 103**

how do i know id the shapes are soft or hard or bump blend or over lap i don't know anything about art really please and thank you

**art 103**

i don't understand what is organic or geometric

**art 103**

"Street, Dresden", 1907, oil on canvas by Ernst Ludwig Kirchner. Describe the shapes in this painting: Are the shapes organic or geometric? Which ones? Describe how the shapes interact, or "touch" each other. Are the edges of the shapes soft or hard? Do ...

**Science**

Your journey to the centre of the earth took 64 hours at 100km/h. What was the total distance you traveled??

**Precalculs**

6x-12=log(x)1 that is base x I know the answer is 2 but not sure how to do

**Chemistry**

Magnesium chloride hexahydrate has a density of 1.69 g/cm3. What is the volume in liters of 1.5 x10^2 pounds of MgCl2*6H2O? yes D=m/v into V=m/d, Do I need to find the formula mass of Magnesium chloride hexahydrate and change pounds into liters? Divide the found numbers and I ...

**Pre calculus**

olve the system of equations using matrices. Use Gaussian elimination with back-substitution. x + y + z = -5 x - y + 3z = -1 4x + y + z = ...

**Kamal School**

Try to analyze a little , if Raghav's fruit stallsold 2/5 of a box of apricats and Raj Fruit sold 2/3 as many boxes of apricats as Raghav's did ,therefore 2/5 can be called x and 2/3× is ???

**chemistry**

what is the actual freezing temperature of a 0.50m aqueous solution of sodium chloride?

**English**

The customer paid by _______ for his new ______ suit..

**Math**

sixty-four is four tenths of what number?

**math**

stem leaf plot stem leaf 5 4 5 6 0 6 9 7 2 3 4 5 5 8 1 2 8 9 9 5 6 a)what is range of data?B) median of data? C) and mode of data A)? B)74.5 C) 75

**math**

which is Q=200p/l solved for p is it p=QL/200

**math**

which is M = 9pn solved for p?

**Algebra**

How would you solve y=2x+3 and y=2x-2 using the substitution.

**physics**

How much work is required to push a crate at constant velocity with a force of 185 N across a floor a distance of 8 m? J How many calories of thermal energy are produced by the friction? cal

**Geometry**

Two telephone poles are 60ft. apart, and one of them is 6ft. higher than the other. If the length of the wire between the poles is 61.3 ft., how much wire was allowed for sag?.

**Math**

Find the area f(x)=10x/x^2+1, y=0, 0 less than or equal to x less than or equal to < 5

**Ecology**

Draw and label a diagram of 3 different tree pollens with magnification power.

**life orientation**

Hurting other peoples Disrespecting Acting against someone's rights

**chemistry**

if 62.3 g of zinc react with hydrophosphoric acid (H3PO4) it produces zinc (I) phosphate and hydrogen. how much zinc (I) phosphate is produced?

**Math**

Thank You Mrs.Sue that makes sense.

**Math**

Mrs. Sue how did you get that answer. Do you multiply?

**Math**

A candle burn for up to 4 hours. Which amount of time is equal to 4 hours?

**math 4th grade no algebra**

Jen is 26 years younger than her mom. Together, their ages total 50. How old is Jen? How old is her Mom? My 4th grader has not learned algebra yet, so how do we solve this?

**im freaked out**

It was a test to see how fast you would respond. You guys are great i love this site!

**Ok so please help**

Help!!

**im freaked out**

Where is a bugs heart located?

**Basic Finance**

43.09%

**physics**

A constant electric field is 29, 000N/C is created between two parallel plates. If the potential difference is 140, 000V , how far apart are the two plates?

**physics**

Two charges +q and −q are separated by a distance d. Find an expression for the potential difference VBA = VB − VA, where points A and B are both a distance b from the charges. ￼

**DYNAMICS OF RIGID BODIES**

A missile is fired with a launch velocity of 15000 ft/s at a target 1200 miles away. How long after it is fired will the target be hit? Use g = 32 ft/s.s Express your answer in seconds

**Math**

Fred walks a steady 3 2/3 miles per hour. The beach is 4 1/4 miles from his home. How long will it take fred to walk from his home to the beach and back home again???

**MATh**

31/3 = 4 6/9 which breaks down to 4 2/3 42/9 = 10 1/3 4 2/3 + 10 1/3 = 14 3/3 = 15

**math**

There are 24 students in a class. One student will be randomly selected as representative on the student council. if there are 9 boys and 15 girls in class, what is the probability that the representative will be a boy?

**math**

In the middle of the page, draw two circles an inch apart. Then draw a slight arch going up from the right edge of the left circle to the left edge of the right circle. Then draw a diagonal line out from the left edge of the left circle. This line should go up. Then draw a ...

**Math**

I will like help with a question on my homework.the question said in a trapezium one angle measure 85 and the other measures 95 what is the size of angle b and angle a.thank you.

**Math**

Can you check these? .04 is 1/8% of what number? 32 What percent of 1/8 is 3 1/2? 2800%

**Math**

Is this correct? What is 383 1/3% of 6/10. The answer is came to is 2 3/10 or 2.3

**Math**

Is this correct? .04 is 1/8% of what number? 32

**algebra 1**

For some real number b, the graph of the line y = 3 x + b passes through the point (7, −3). What is its y-intercept?

**math**

.72*2=1.44 1.44*(1/5)=0.288 1.44+0.288=1.728

**Algebra**

There are at least three equivalent forms for the equation of a non-vertical line. Identify three forms, and then write at least one paragraph explaining one of them.

**Algebra**

a)Write an equation for the line that passes through the points (0,5) and (4,12). Use any valid form of a linear line. b)You are taking a Yellow Cab in St. Paul from Como Park to the State Capitol (a 3.2 mile trek). When you get in, you are charged $6.90 for the likely amount ...

**Algebra**

y^2-x-4=0 a)find all x and y intercepts of the graph implied by this equation. (use an appropriate equation). b) test the graph for symmetry using algebra. (explain reasoning through algebra)

**Math- Calc**

Suppose f(5)=5, f′(5)=5, g(5)=8, g′(5)=−8, and H(x)=f(x)e^(g(x)). Find the derivative (dH)/(dx) x=5. H′(5)= ___

**Math**

A rectangular box is 4cm wide, 4cm tall, and 10cm long. What is the diameter of the smallest circular opening through which the box will fit? Round to the nearest tenth of a centimeter. Is it 4 squared plus 4 squared which equals 32 then take the square root of 32 and get 5.65...

**Math- Calc**

Suppose F(G(x))=x^(2) and G′(1)=5. Find F′(G(1)). F′(G(1))= ___

**bio tech**

Describe hpow you would prepare 2 L of a 0.5 g/ml dextrose solution?

**math**

You make cards and sell them for $2.50 each. It costs $1.15 to print each card. You also pay $50 for supplies. How many cards must you sell to meet the cost for making the cards (you break even)? Round up to the next whole card.

**math 4th grade**

The area of Charleston vegetable garden is 40 square feet.If the width of the garden is feet. What is the length of the garden?

**math 4th grade**

The question is correct. This is way the she gave the problem

**math 4th grade**

Mrs. Myers makes a flower garden outside the club house. The garden is 23 meters wide and 27 meters long. What is the area of Mrs. Myers garden?

**math 4th grade**

The area of Mrs. Charleston vegetables garden is 40 square feet.If the width of a garden is feet. What is the length of the garden?

**Managerial Finance**

Isabelle wants to save up an amount of $150,000 for her son's college education fees, coming up in 5 years. Find the amount that should be invested today if the bank pays an interest rate of 5% compounded annually

**Math**

A rectangle ABCD is inscribed in a circle of radius 'a'. Find the 'area of the rectangle' function and state the domain.

**math**

There were six hundred students to a football match the beginning of the match there one thousand students

**Math- Calc**

Suppose f(x)= |x^(2)+2x−63|. Where is f(x) not differentiable?

**Math**

Hmm, DNE was incorrect.

**physics**

A ball is tossed from an upper-story window of a building. The ball is given an initial velocity of 7.50 m/s at an angle of 18.0° below the horizontal. It strikes the ground 5.00 s later. (a) How far horizontally from the base of the building does the ball strike the ...

**Math**

Thank you so much :)

**Math**

Impulses in nerve fibers travel at a speed of 293 ft./sec . the distance D traveled in T seconds is given by D =293t . how long would it take an impulse to travel from the brain to the toes of a person who is 6 feet tall? My answer: 6ft=293t 6/293=0.020477 seconds?

**math**

Your math test has 38 questions and is worth 200. points. The test consist of multiple choice questions worth 4 points each and open ended questions worth 20 points each. How many of each type of question are there?

**Math**

During a sale at a store, you buy 3 sweatshirts and two pairs of sweatpants for 85.50. Later you buy 3 more sweatshirts and 4 more pairs of sweatpants for 123.00. WHat is the sale price of each sweatshirt and each pair of sweatpants? How did you get the answer what formula

**Math**

A student bought 3 boxes of pencils and 2 boxes of pens for $6. He then bought 2 boxes of pencils and 4 boxes of pens for $8. Find the cost of each box of pencils and each box of pens.

**Introductory algebra**

1/11-(-4/11) add or subtract as indicated

**physics**

A tourist being chased by an angry bear is running in a straight line toward his car at a speed of 3.55 m/s. The car is a distance d away. The bear is 17.1 m behind the tourist and running at 4.84 m/s. The tourist reaches the car safely. What is the maximum possible value for d?

**MATH**

Well. This just stinks.

**MATH**

Sorry, these were the right answers. :/

**MATH**

1. Which is equivalent to this expression? 9 – 5(4 – 2) / 3 + 5 A. -13/8 B. -1/8 C. 1 *** D. 7/4 2. There are 2 linen closets and 3 walk-in closets in each apartment in a building. The total number of closets in the building can be represented by 2n + 3n, where n ...

**Math**

Find ∑(j=12 up to 99) of 2j+1/(((j+1)^2)j^2)

**Social Studies**

Never mind people! im in 6th grade.

**Social Studies**

I need help with this to!!!

**Physics**

If a 1350 kg minivan hits a barrier with a force of 2500 n and stops in 2.8 sec, how fast must the minivan have been traveling?

**math**

In right triangle ABC,BC=8cm and AC=17cm.Find the value of sin C

**math**

what is the dimension of 100 ft diagonal?

**Math**

There is a box and inside it is a bunch of hats. 1/6 of the hats are red, 1/3 of the hats are blue. 3/7 of the remainder are green. There are 27 green hats. How many hats are there in total?

**Math**

The telephone company wants to know how many different phone numbers are available for one area code. the only restrictions are on the prefixes, you can't start with a zero and you can't use 411, 611, 811, 911, or 555. how many different phone numbers are available?

**grammar**

ask not what your country can do for you but ask what you can do for your country,said john f.kennedy. tell me how to change this sentence in indirect speech

**Geometry**

If congruent side FH is a median of△EFG,find the perimeter of △EFG

**math**

Michael spends three hours cleaning his house you spend equal amount of time cleaning each room you spend a half an hour cleaning its room how many rooms does he have left 3/1 ÷1/2= 3/1× 2/1 =6/1 =6

**math**

the total surface of a cube that is y inches on each side.what is the algevraic expression

**Math please help**

So is my equation correct?

**Math please help**

A cos wave has its first maximum at the point (pie/2, 2) and its first minimum at (5pie/2, -4) what is the equation of the function? I remember writing 3cos(1/2(x-pie/2)-1 but I'm sure that it's wrong ?

**Math trigonometry**

A cos wave has its first maximum at the point (pie/2, 2) and its first minimum at (5pie/2, -4) what is the equation of the function? I remember writing 3cos(1/2(x-pie/2)-1 but I'm sure that it's wrong ?

**Math**

A cos wave has its first maximum at the point (pie/2, 2) and its first minimum at (5pie/2, -4) what is the equation of the function? I remember writing 3cos(1/2(x-pie/2)-1 but I'm sure that it's wrong ?

**Math**

Determine the angles if sin= -1/2 My answers were 11pie/6 and 4pie/3 ?

**physics**

What thickness of Pyrex glass would have the same R−factor as a 1.0−cm thick stagnant air pocket?