# Posts by Kim

Total # Posts: 2,646

**physics**

T=sqrt(2 times height) *gravity T= sqrt{(30)*9.8} T= sqrt(3.06) T= 1.7 seconds Therefore it would take 1.7 seconds Max height : 1.7 seconds * 9.8 m/s^2 =16.66 m or 17 meters approx Therefore the max height reached is approx 17 m

**biology**

how many copies of genome are present in a diploid cell in G1 phase?

**Please help needed urgent**

q = -168 kj delta H= -92.2 kj/mol n=? n= -q/ delta H n= -168 kj / -92.2 n= 1.82 n= m/Molar mass of NH3 m= n* MM m= 1.82 moles * 17.03 g/mole m= 31.02 g Therefore, approx . 31.02 grams of NH3 is produced

**Chemistry**

I'm gonna try the second one delta V = 0.750 L- 0.250L = 0.50 L P= 0.933atm w= -Pdelta V w = - 0.993 atm *0.50 L w= - 0.4965 atm *L In Joules: -0.4965 L* atm *101.3 J/ 1 L*atm= -50.31 joules I think -50.31 joules of work is done (since energy is absored q is positive)

**science**

Woman weighs= 55 kg cup of coffee = 94 mg of caffeine LDL = 400 mg/ kg Cup of coffee ( 8 oz) How many cups would it take to reach the LDL?

**Math**

How did you get this answer ?

**Chemistry **

A 8.07g sample of impure Ag2O decomposes into solid silver and O2(g). If 395mL of O2(g) is collected over water at 25 degrees Celsius and 749.2 mmHg barometric pressure, then what is the percent by mass of Ag2O in the sample? The vapor pressure of water at 25 degrees Celsius ...

**english**

how does the men's final choice lead to the end of the story two friends

**world history**

what parts of europe still has an agricultural economy in the early twentieth century

**English**

Actually i'm taking a quiz with that question and the only two that overlap is the first one, so I'd have to assume that's what the answer is.

**Maths**

Have you tried dividing 59761/1591?

**College Paper**

How do I critique an article using 2 journal articles in a paper. What outline can I follow in writing my paper.

**English**

The assignment was originally due on Tuesday; however, the instructor changed to due date to Thursday. Would this be correct?

**English**

Pedros’ and Marleys’ books will be published in October. Is that the correct answer?

**English**

Oh sorry i thought i put an xx for 4. My answer for 4 is D. Can you explain to me why its wrong.

**English**

1.What is the correct way to punctuate the end of this sentence? Did the baseball player say, “I can do the splits” Did the baseball player say, “I can do the splits?” Did the baseball player say, “I can do the splits”? xx 2. Which sentence ...

**social studies**

why was solon important? A. he was the macedonian king who united Greece B. he set up salaries for officials so poor people could serve C. he was the general who defeated the persian invaders D.he ended slavery for people who fell in debt i think its A please help

**English**

Parents want their children to go to college however they do not always have the funds to send them

**geometry**

square 1 has a side length of x, and square 2 has a side length of y. Square 2 is formed by joining the midpoints of the sides of square 1 in order. If x=2, find the ratio of the are of square 1 to the area of square 2

**math **

License plates consist of letters and/ or digits. Calculate the number of licence plates that could be formed in each province or territory. Assume all numbers and letters are possible. a) Ontario, with 4 letters followed by 3 digits b)Québec, with 3 letters followed by...

**math**

Caleb needs to create an 8-digit password using only numbers. How many different passwords are there if he wants to use 00 exactly once?

**math**

A salesperson needs to visit 15 different offices during the week. In how many ways could she visit 3 different offices each day from Monday to Friday?

**Algebra**

I am supposed to be learning how to divide polynomials by monomials but im stuck please help. (4x³ + 10x² + 3a) ÷ 2x²

**Chemistry **

A sample of 2.50 g LiI is added to 75.0 mL of water initially at 21.0°C. After stirring and dissolving, the temperature of the solution is 24.3°C. Assume that the specific heat of the solution is 4.184 J/g°C, the density is 1.00 g/mL, and the calorimeter constant ...

**calculus**

from a cardboard box 12 in by 8 inches are cut out so the sides can be folded up to make a box . What dimentions will yield a maximum volume? What is maximum volume? we got our V = 4x^3--40x^2+96x V'=12x^2-80x +96 then we know to use quadratic equation I get 20( +/-) sqrt ...

**Geometry Proofs**

I don't think it's doable. You might not have been given enough information. Are you sure you included it all?

**Economic part 2**

I think the answer is c

**Economic part 2**

Two countries shown in the chart ranked higher in overall development than the United States did. The United States had a higher per capita GDP than these countries. What factors accounted for the higher rankings of these countries? A. Iceland had the highest rankings in all ...

**Trig**

*35 degrees

**Trig**

Morana is trolling for salmon in Lak Ontario. She sets the fishing rod so its tip is 1 m above the water and the line enters the water at an angle of 45 degrees. Fish have been tracked at a depth of 45km. What length of line must she let out?

**Statistics**

Suppose x is a uniform random variable with values ranging from 20 to 70. Find the probability that a randomly selected observation is between 23 and 65.

**Statistics**

Suppose x is a uniform random variable with values ranging from 40 to 60. Find the probability that a randomly selected observation exceeds 54. *** Im not sure how to do this. I thought I needed a standard deviation.

**Math-fractions**

A receipt requires 1/2 cup of flour for every batch of cookies. How many full batches of cookies can be made with 5 1/2 flour?

**physics **

A 75.0 kg person bends his knees and then jumps straight up. After his feet leave the floor, his motion is unaffected by air resistance and his center of mass rises by a maximum of 13.5 cm. Model the floor as completely solid and motionless. With what momentum does the person ...

**physics **

A 75.0 kg person bends his knees and then jumps straight up. After his feet leave the floor, his motion is unaffected by air resistance and his center of mass rises by a maximum of 13.5 cm. Model the floor as completely solid and motionless.

**Chemistry **

An electron initially in the n = 2 energy level in a hydrogen atom absorbs a photon of light with a frequency of 6.167 x 1014 s-1. Calculate the new energy level the electron will occupy. I am not sure how to being.

**Chemistry**

A solution is labeled 0.450m hcl. What is the h+ for the solution?

**Mathhhhh**

There are 260 skittles but only 133 were eaten. How do I find the percentage of what was eaten?

**math**

Four men, Eddie Jake, Deon, and Fred are watchmen in a small factory in Lorain. Their job consists of two daily shifts of six hours each, interrupted by a rest of several hours. At any hour of the day or night there must always be two men on duty. However, no two men's ...

**statistics **

A school club consists of 22 male students and 15 female students. If 3 students are selected to represent the club in the student government, what is the probability 2 will be male and 1 will be female?

**Physics**

The lenses used in a compound microscope have powers of + 110 D and + 60 D . If a total magnification of -150 × is desired, what should be the distance between the two lenses?

**Math**

Sade found that 75% of 60 is the same as 30% of another number n.what is the value of n?

**Math**

Which of the following is a factor of both x2- x-6 and x2 - 5x + 6

**Chemistry**

Calculate the number of moles of ZnCl, in 100mL of 3.00M solution.

**Math**

An electron weighs about 10^(-27) grams, and a raindrop weighs about 10^(-3). a raindrop is 24 times heavier than an electron. an electron is 24 times lighter than a raindrop. but idk what is the order of multitude difference.. or how to calculate it... i put 0 and 1 but its ...

**math**

In the 1870's, on a farm along the Ohio River, a girl was presented with three gifts: a rooster, a goose, and a duck. The duck had cost 20 cents. The rooster and the goose together cost twice as much as the duck. The goose and the duck together cost three times as much as ...

**calculus**

The voltage in a electric current is 100 volts then with Ohm's law how do you find the instantaneous rate of change of I with respect to R ta a resistance of 20 ohms if R is increasing I know how to use the instantaneous formula but what is f(a)

**math**

Mike's age right now is exactly 3 times his age 3 years hence minus 3 times his age 3 years ago. How old is Mike right now?

**Algebra (answer check)**

Thank you! :D

**Algebra (answer check)**

Where is the vertex of the graph of y equals negative x squared plus 2 x plus 5 located? (1,5) < it's not this one (1,6) (-1,3) <-- (-1,2) Which values best approximate the solutions of -4x^2+7x+5=0? 0.9 and 2.3 0.9 and 5 -0.5 and 2.3 <-- -0.5 and 5 What is the ...

**FSCJ**

please help!! A storage tank 32 m high is filled with pure water. (Assume the tank is open and exposed to the atmosphere at the top.) (a) Find the gauge pressure at the bottom of the tank. (b) Calculate the magnitude of the net force that acts on a square access hatch at the ...

**English**

And would these work as well? 3) They claimed the foreign land And took it by the hands. 4) The Natives’ lives turned black When the strangers came packed. (both historical allusions to what the european settlers did to the natives)

**English**

For a project I have to come up with some allusions in a couplet format and I am iffy on how to write my own. I was wondering if these were ok. 1) Their death by disease Was not what they pleased. (I was going for a historical allusion to the Native Americans) 2) The town soon...

**Math@@**

How do I solve v + 17 -11= 65

**Math**

The length of a rectangle is 1 m more than twice its width. What is the length of the rectangle if its perimeter is 110m?

**algebra**

identify the initial amount a and the growth factor b in the exponential function g(x)=4X2

**calculus**

find the limit x-->inf (x^2+x)^1/2-(x^2-x)^1/2 so I know I multiply by the conjugate 2x/(x^2+x)^1/2+(x^2-x)^1/2 then I don't know where to finish problem

**BIOLOGY/EVOLUTION**

I need answers for these questions too T.T

**Chemistry **

solid sodium reacts violently with water producing heat, hydrogen gas and sodium hydroxide. How many molecules of hydrogen gas are produced when 65.4g of sodium are added to water? 2Na(s)+ 2H2O(l) -->. 2NaOH(aq) + H2(g). Can someone please explain this question and it's...

**Social studies**

Witch of the following actions is a check by the legislative branch on the actions of the executive branch ?

**biology**

When you talk of genotype it refers to the alleles of the organism. Like FFpp, FfPp. For example: Dominant: White Flower (F) Recessive: Purple Flower (f) The possible genotypes for white flowers in the F1 generation are: FF and Ff. When for purple flowers is only ff. So in the...

**MATH**

How do I find 30% of 50?

**maths**

the width of a rectangle is increased by one tenth, but the area remains the same. by what fraction has the length of the rectangle been reduced?

**Math**

25.32= 3/5 25.32 divided by 3= 8.44 8.44 = 1/5 8.44 times 2= 16.88 2/5 = 16.88 Jaine spent 16.88 pounds on her sweater.

**math**

get your calculator, put 1335 times 59 and the answer is 78765.

**math**

Evaluate 13 35 × 5 9

**Statistics**

If the probability of randomly choosing a county resident from a class of students is 65%, what is the probability of selecting exactly 7 county resident out of a random group of 10 students?

**Business Analytics ISDS361B**

Eli Orchid has designed a new pharmaceutical product, Orchid Relief, which improves the night sleep. Before initiating mass production of the product, Eli Orchid has been market-testing Orchid Relief in Orange County over the past 9 weeks. Now that the daily demand for Orange ...

**English**

Identify the sentence type. I have to do my homework before I can watch TV. a. simple c. complex b. compound d. compound-complex

**Math**

Right in equation to show the relationship between the input and output

**Physics**

Two questions and a small confusion that is not letting me do my homework: When is said that an object is rotating it is mandatory that the addition of rotational momentums gives 0? Under what conditions, two forces of same magnitude but different direction exerted in a body, ...

**trigonometry**

The diagram is a right triangle, so the length of the ladder would be its hypotenuse, and the height of the wall, the opposite side of the angle of 48. Then Sen 48= x / 15 Clear x and that's the answer.

**Physics**

I can help you with C: You have height, acceleration (9.81), and initial velocity (0) so you use: Vf ^2 = Vi^2 + 2gh

**Math**

Y=2x-5 and 4x-y=7

**math**

Which of the following statements is true about the level of significance alpha?

**Math**

One square wall you want to paint has a perimeter of (12x - 32) feet. Write an expression that represents the side legnht of the wall.

**Chemistry**

Elemental analysis of a compound, once used as a pesticide, was found to be 74.2% carbon, 8.64% hydrogen, and 17.2% nitrogen. What is the empirical formula of this compound?

**Chemistry**

November's birthstone is citrine, a yellow member of the quartz family. It is primarily silicon dioxide, but small amounts of iron(III) ions give it its yellow color. A high quality citrine containing about 0.040 moles of SiO2 costs around $225. If this stone were pure ...

**Chemistry**

There are about 1 x 10^5 chemical reactions per second in each of the 10 billion nerve cells in the brain. How many chemical reactions take place in a day in a single nerve cell?

**Chemistry**

What is the minimum volume of 2.00 M hydrochloric acid necessary to neutralize completely the hydroxide in 800.0 mL of 0.3 M calcium hydroxide?

**Math**

6(2b)

**Math**

6 + (5 + x) simplify the expression. Explain each step. How do I do this?

**geography**

Some have none but some have more than a hundred

**Math**

Seven subtracted from five times a number, then the difference added to nine times a number

**ratio and proportion**

832 foot tree casts a shadow of 18 foot how long will the shadow be for a 22 foot tree

**Science**

A cicular pool with a radius oF 12 meter if filled with water to a depth of 3 meters. What is the weight of water in the swimming pool?

**MATH HELP PLZZ ASAP**

Sorry, i mean 55 divided by 4

**MATH HELP PLZZ ASAP**

The youngest Julio can be is 6. As for the equation, 55 divided by 2 which is 13.75. Then divide that by 2 to get 6.875. No one can be 6.875, so the younges he can be is 6. Add on the rest, (48.125) and you'll find out that the oldest his father can be is 48. Hope this ...

**calc**

Find k so that the function is continuous on any interval. h(x) = k cos x 0 ≤ x ≤ 3π h(x)= 10 − x 3π < x I am confused on how to find k when it gives you 3pi? help please

**Math**

How many choices do I have if I use three colors from red, white, yellow and blue

**physics**

a baseball is batted with a speed of 120 ft/sec at an angle of 37 degrees with the ground. find how long the ball is in the air, how high the ball goes, how far from the plate it is caught, and the components of the velocity of the ball 4 sec after it is hit.

**physics**

A microwave oven has a power requirement of 1250 W. A frozen dinner requires 6.5 min to heat on full power. If the cost of electricity is 12 cents per kWh, how much does it cost to heat the dinner?

**physics**

A microwave oven has a power requirement of 1250 W. A frozen dinner requires 6.5 min to heat on full power. How much electrical energy (in kWh) is used?

**physics**

How much heat is necessary to change 345 g of ice at -11°C to water at 20°C

**physics**

While in Europe, a tourist hears on the radio that the temperature that day will reach a high of 22°C. What is this temperature on the Fahrenheit scale?

**physics**

How much heat is necessary to change 345 g of ice at -11°C to water at 20°C?

**physics**

A 4.6 "kilo" bag of sugar is on a counter. How much work is required to put the bag on a shelf a distance of 0.45 m above the counter

**physics**

How much work is required to lift a 5.2-kg concrete block to a height of 3.1 m?

**physics**

What is the kinetic energy of a 15 kg dog that is running at a speed of 8.7 m/s (about 19 mi/h)?

**physics**

A 4.6 "kilo" bag of sugar is on a counter. How much work is required to put the bag on a shelf a distance of 0.45 m above the counter?