Sunday

December 4, 2016
Total # Posts: 397

**chemistry**

If dissolving 2g of ionic salt causes 50ml of water in increase temp. by 15 degrees Celsius at constant pressure, what would be the change in temperature if 6g of the same ionic salt were used instead? Assume the volume of solution remains the same.

*November 18, 2016*

**mechanical**

A cylindrical tank with flat endplates is constructed from two sections that are welded together circumferentially.The outer diameter of the tank is 1.20, and the wall of the tank is 20.0 mm thick and the mamimum internal pressure is 2.00 MPa. (a) Calculate the maximum hoop ...

*November 16, 2016*

**Math**

Thuy is 54 inches tall.A tree in her backyard is 5 times as tall as she is. The floor of her treehouse is 108 inches from the ground. What is the difference, in inches, between the top of the tree and the floor of the treehouse? Is this correct? 54*5-108=162

*November 8, 2016*

**Physics **

) A car is traveling on a straight, horizontal road at 20 m/s when the driver slams on the brakes. The force of friction between the car and the road is 900 N. The mass of the car is 1800 kg. (a) Make a free body diagram for the car on the set of axes provided. (b) How far ...

*November 4, 2016*

**math**

There are 24 students in a class. If 1/4 students wear glasses. How many students do not wear glasses? I multiply 24(1/4)=6 so 24-6=18 so is 18 students correct?

*October 26, 2016*

**Math**

How do i explain what 40 hundred thousands is?

*October 11, 2016*

**Social studies **

How did George Washington create and shape our community? would these be a few ways he created a cabinet system he created the first bank he set the term limit of the president

*October 4, 2016*

**Writing **

Please check this Apostrophe: 1) Kates' sister 2) the giraffe's neck 3) the parent's anniversary 4)the senator's cars 5) Toms' folder 6) the deer's habitat

*October 3, 2016*

**Math**

Never mind found the answer here already

*September 15, 2016*

**Math**

Jade ran 6 times around her neighborhood to complete a total of 1 mile. How many times will she need to run to complete 5/6 of a mile?

*September 15, 2016*

**math**

Sarah baked 78 cupcakes for the bake sale. Gabby baked 45 cupcakes for the bake sale. 93 cupcakes were sold at the bake sale. Which is a way to find the number of cupcakes NOT sold? A.Add 78,45,and 93. B. Find the sum of 78 and 45. Then subtract 93. C. Find the difference ...

*September 8, 2016*

**Math**

-2(3.1) 3.1×2= When multiplying rational numbers same sign will always be positive (+) and different sign will always be negative (-). By:nimotalai Sarumi Tommy thought polat nimotalai.

*September 7, 2016*

**Math**

-2(3.1) 3.1×2=-6.2 When multiplying rational numbers same sign will always be positive (+) and different sign will always be negative (-). By:nimotalai Sarumi Tommy thought polat nimotalai.

*September 7, 2016*

**algebra**

what is the simplified form of the following question? 7m^2+6.5n-4n+2.5m^2-n

*September 6, 2016*

**Math**

morning at 10:00 am was 17.6°c. Temperatures fell by 16.7°c between 10:00 pm -11:00 pm. What was temperatures at 11:00?

*August 19, 2016*

**Chemistry**

50.00mL of 0.250M hydrochloric acid was added to 25.00mL of 0.300M potassium hydroxide. Calculate the pH of the resulting solution.

*June 12, 2016*

**math**

rosa and four friends earned money from their combined garage sale.After Rosa spent $2 out of her earnings she had $15 left. How much money n, did the combined garage sale earn?

*June 8, 2016*

**math**

you need 1 1/4 cups of sugar to make 20 cookies. to make 6 cookies, you need___ cups of sugar?

*April 27, 2016*

**MATH**

The LRT trolley system 10 miles long is fed by two substations that generate 600 volts and 560 volts, respectively. the resistance of the trolley wire and rail return is 0.3 ohm per mile. if the car located 4 miles from the 600-volt station draws 200A from the line, how much ...

*March 10, 2016*

**i need help please math**

describe the single transformation that would be equivalent to a reflection over the y-axis followed by a reflection over the x-axis

*February 10, 2016*

**Math**

(1/2 mile) / (1/4 hour) = 2 miles per hour

*February 10, 2016*

**wuzzles **

eye fit fit fit fit can someone please help me solve this

*February 9, 2016*

**wuzzles **

p o u r can someone help me solve this wuzzle

*February 9, 2016*

**Math**

it would be D

*February 9, 2016*

**math 2**

given a circle with (5,1) and (3,-1) as the endpoint of the diameter

*February 7, 2016*

**physics**

Falls resulting in hip fractures (or head injuries) are a major cause of injury and even death to the elderly. Typically, the hip’s speed at impact is about 2.0 meters per second. If this can be reduced to 1.3 meters per second or less, the hip will usually not fracture. ...

*February 1, 2016*

**Math**

intersecting lines (1 point)40¨¬ 50¨¬ •• 140¨¬ 180¨¬ 2. Which word best completes this statement? Adjacent angles are ___________ congruent. (1 point)always sometimes •• never none of these 3. Which angle is adjacent to &...

*January 27, 2016*

**Math**

Which word best completes this statement? Adjacent angles are_______ congruent. A. Always B. Sometimes •• C. Never D. None of these Correct me

*January 27, 2016*

**Connexus Help me!!**

I need help in an assignment from Connexus and its in math but I can't put the question because the question includes a diagram. The unit it's on math and its lesson 3: indentifying and classifying angles:2 Math 7B unit 1: Geometry. So if anybody that goes to Connexus ...

*January 27, 2016*

**Language Arts**

Also can you correct me on this! Which of the following should you do during your second read of the multi-draft reading process? A. How has this work increased my knowledge of a subject, author, or genre? B. How dose the speaker feel about the topic?• C. How dose the ...

*January 26, 2016*

**Language Arts**

I have another question? The connotations of which word in the poem help you understand the speaker's attitude toward fame? a. public b. dreary•• c. livelong d. admiring

*January 26, 2016*

**Language Arts**

Won't it be A

*January 26, 2016*

**Language Arts**

Are you – Nobody – too? Then there’s a pair of us! Don’t tell! they’d banish us – you know! How dreary – to be – Somebody! How public – like a Frog – To tell one’s name – the livelong June – To an admiring Bog! 4...

*January 26, 2016*

**physics**

A biophysics student measures her reaction time by having a friend drop a meterstick between her fingers. The meterstick falls 0.300 meters before she catches it. (a) What is her reaction time? (b) Estimate the minimum average speed of nerve impulses going from her eye to her ...

*January 26, 2016*

**physics**

(a) In 2009, Usain Bolt ran the last 100 meters of the 150-meter race in 8.70 seconds. What is Usain Bolt’s speed? (b) The world record for the 100-meter dash is 9.58 seconds (Bolt, 2009). Use the speed from part (a) as his maximum velocity. Assume a sprinter accelerates ...

*January 26, 2016*

**Math**

Simplify 2(x+6)-9x

*January 13, 2016*

**Math PLEASE HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!**

Are those the right answers?

*January 11, 2016*

**Math**

I am thinking of two two-digit numbers.they differ by 54.Both numbers are made up of the same digits, are reversed.What are the two numbers?

*December 7, 2015*

**Chemistry**

Determined at which temperature is the solubility of KNO3 at 60 grams per 100 grams of water

*November 16, 2015*

**algebra**

x^2+80^2=100^2

*October 26, 2015*

**finite mathematics**

A financier plans to invest up to $2 million in three projects. She estimates that Project A will yield a return of 10% on her investment, Project B will yield a return of 15% on her investment, and Project C will yield a 20% return on her investment. Because of the risks ...

*October 23, 2015*

**Statistics**

According to one survey, the mean serum cholesterol level for U.S. adults was 195.1, with a standard deviation of 41.5. A simple random sample of 95 adults is chosen. Find the 46 percentile for the sample mean. Write only a number as your answer. Round to one decimal places.

*October 6, 2015*

**Statistics**

Electricity bills in a certain city have mean $108.73. Assume the bills are normally distributed with standard deviation $10.60. A sample of 47 bills was selected for an audit. Find the 46 percentile for the sample mean. Write only a number as your answer. Round to two decimal...

*October 6, 2015*

**Statistics**

A survey among freshman at a certain university revealed that the number of hours spent studying the week before final exams was normally distributed with mean 25 and standard deviation 15. A sample of 36 students was selected. What is the probability that the average time ...

*October 6, 2015*

**Statistics**

The mean monthly rent for a one-bedroom apartment without a doorman in Manhattan is $2,651. Assume the standard deviation is $500. A real estate firm samples 100 apartments. What is the probability that the average rent of the sample is more than $2,708? write only a number as...

*October 6, 2015*

**Statistics**

Suppose that the weight of male babies less than 2 months old is normally distributed with mean 11.5 pounds and standard deviation 2.7 pounds. A sample of 36 babies is selected. What is the probability that the average weight of the sample is less than 11.07 pounds? Write only...

*October 6, 2015*

**Math**

thank you.

*October 3, 2015*

**Math**

Is b. 9.909 correct?

*October 3, 2015*

**Math**

I need help with this problem: Circle the number closest in value to 10.1 a. 9.9 b. 9.909 c. 10.99 d. 10.5

*October 3, 2015*

**Algebra 2**

Can someone please help me solve this rational expression?

*September 12, 2015*

**Algebra 1**

A teacher buys 50 train tickets for a school trip for a total cost of $1,200. She buys x number of student tickets for $20 each. She also buys y number of adult tickets for $30 each.

*August 26, 2015*

**Physics**

What is the tension in the string in (Figure 1) ? The volume of plastic ball is 95 cm3 and the density is 840 kg/m3.

*July 26, 2015*

**Physics**

The two ropes shown in the bird's-eye view of (Figure 1) are used to drag a crate 3.7 m across the floor. How much work is done by the force fk→? How much work is done by the force T1→? How much work is done by the force T2→?

*July 22, 2015*

**Physics**

A mineshaft has an elevator hung from a single steel-wire cable of diameter 2.5 cm. Young's modulus of the cable is 10×1010N/m2. When the cable is fully extended, the end of the cable is 500 m below the support. How much does the fully extended cable stretch when ...

*July 15, 2015*

**Algebra 2**

Can someone check my work please? I tried my best on all the problems but I still don't understand excluded values and how to simplify rational expressions. Thank you in advance for any help! 1)6x^5/2x^3 6/2 = 3 3x^5/x^3 x^5-x^3 = x^2 3x^2/1 2) (2x+4)+(x^2 +2x) 2x+4: 2(x+2...

*July 9, 2015*

**Physics**

A sprinkler mounted on the ground sends out a jet of water at a 35∘ angle to the horizontal. The water leaves the nozzle at a speed of 15m/s . How far does the water travel before it hits the ground?

*June 17, 2015*

**physics**

A car moves with constant velocity along a straight road. Its position is x1 = 0 m at t1 = 0 s and is x2 = 48m at t2 = 5.0s . Answer the following by considering ratios, without computing the car's velocity. What is the car's position at t = 2.5s ? What will be its ...

*June 12, 2015*

**Physics**

In a 5.00km race, one runner runs at a steady 11.6km/h and another runs at 15.0km/h. How long does the faster runner have to wait at the finish line to see the slower runner cross?

*June 12, 2015*

**Algebra 2**

Yes, sorry I meant evaluate. But the equation is not √2/(2+√2). The equation is √2/2 + √2

*May 20, 2015*

**Algebra 2**

I have tried solving this problem over and over but I'm still not sure with my answer. The question is sqrt2 / 2 + sqrt2. I think the answer is 1/sqrt2 + sqrt2 because you have to cancel out the common factors.

*May 20, 2015*

**physics**

a 16.0-g bullet is shot into a wooden block at rest with mass 4550g on a frictionless surface. the block moves 1.20m/s after the bullet strikes and becomes lodged in the block. find the speed of the bullet before striking the block.

*April 7, 2015*

**physics**

one car of mass 15.0kg is moving 5.00m/s to the right on a frictionless track and collides with a cart of mass 3.00kg. the final velocity of the carts that become stuck together after the collision is 1.50m/s to the right. find the velocity of the second cart before the ...

*April 7, 2015*

**physics**

an archer shoots an arrow into a piece of wood. the arrow is traveling at 120km/h when it strikes the wood. the arrow penetrates 3.8cm into the wood before stopping. what is its average acceleration (in m/s squared) into the wood?

*April 6, 2015*

**Physics**

Hi, I've been stuck on this for days! I'd love if I can get some help. Two unfortunate climbers, roped together, are sliding freely down an icy mountainside. The upper climber (mass 80kg ) is on a slope at 16∘ to the horizontal, but the lower climber (mass 65kg...

*April 3, 2015*

**Physics**

Hi guys, I'm a little stuck on this question I'm doing at the moment. If anyone has spare time, I'd be extremely grateful! A lens with 50-cm focal length produces a real image the same size as the object. a)How far from the lens is the object? b)How far from the ...

*March 18, 2015*

**Physics**

It's not 0%

*March 18, 2015*

**Physics**

Hello!I was wondering if anybody had the time to help me with this question. I am not sure what equation to use with three polarizing filters! I thought we use Malus' Law, but doesnt seem to work. Any help would be greatly appreciated!! The question: Unpolarized light ...

*March 18, 2015*

**Math**

not sure

*March 16, 2015*

**Math**

An art class is planning to paint a rectangular mural with an area of 60 square feet. It has to be at least 4 feet high but no more than 6 feet high. The length and width have to be whole numbers. List all possible lengths for the mural.

*March 16, 2015*

**Physics**

thanks for your time:)

*March 14, 2015*

**Physics**

Hi, can anybody provide some hints in how to approach these questions? I've been stuck on it for days!!! Thank you in advance!! Nodes of a Standing Wave: Consider a standing wave, where y represents the transverse displacement of a string that extends along the x direction...

*March 14, 2015*

**Physics**

Hello to all the fantastic tutors! I'm stuck on this question, I was wondering if there is a way to solve this. A car horn emits 378Hz sound. If the car moves at 23m/s with its horn blasting, what frequency will a person standing in front of the car hear? What I've ...

*March 10, 2015*

**Physics**

A transverse wave 1.1cm in amplitude is propagating on a string; the wave frequency is 44 Hz. The string is under 23-N tension and has mass per unit length of 16g/m . What is the wave speed? What I've done: using sqrt(Tension/mass_per_unit): sqrt(23/16)=1.19m/s But not ...

*March 5, 2015*

**physics**

A car traveling at 20 m/s stops in a distance of 50 m. Assume that the deceleration is constant. The coefficients of friction between a passenger and the seat are µs = 0.5 and µk = 0.03. Will a 70-kg passenger slide off the seat if not wearing a seat belt?

*February 23, 2015*

**math**

A band made a profit of 352.00 and sold 116 tickets and spent 25.00on advertising. How much was the cost of one ticket? T=the cost of one ticket. 116T-25.00=352.00 116T+25.00=+25.00 116T=377.00 116/116T=377.00/116 T=3.25

*February 22, 2015*

**Science**

What is the same in two isotopes of an element? What is different?

*February 10, 2015*

**math**

waffles

*February 2, 2015*

**8th grade Science please help**

Why is soda in an unopened bottle a homogenous mixture?

*February 1, 2015*

**science answer fast please!**

Could a molecule contain only one atom? Explain your answer.

*February 1, 2015*

**science**

Why is graphite considered an element?

*February 1, 2015*

**science gases**

The air that you breathe is a gas.List other gases that you have heard about in a science class.

*January 27, 2015*

**science**

When the temperature of the air in a hot air balloon increases, what happens to the volume of the gas?

*January 27, 2015*

**Physics**

By trial and error, a frog learns that it can leap a maximum horizontal distance of 1.26 m. If, in the course of an hour, the frog spends 27.5 % of the time resting and 72.5 % of the time performing identical jumps of that maximum length, in a straight line, what is the ...

*January 27, 2015*

**Spanish II**

Thank you so much!I am happy to know that my answers weren't as far off as I originally thought. I have a PC with Windows 8. On Microsoft word I use the symbols to make accent marks but I'm not sure how to on my computer.

*January 27, 2015*

**Spanish II**

Hi! I have completed this assignment but I felt like I was guessing throughout the whole thing. Since I could not underline I instead put 5 periods and the numbers instead; the answers are below the paragraph. Is this paragraph correct? Complete the following paragraphs with ...

*January 27, 2015*

**math **

if Dave is 21 years old 2014 how how old will he be in 2020

*January 15, 2015*

**chemistry**

the answer is 9.2 L and 34 lbs.

*December 15, 2014*

**Math**

Mindy picked 4 times as many daisies as tulips for a flower bouquet. She picked a total of 20 flowers. How many more daisies than tulips did she pick?

*November 10, 2014*

**Math**

What 3 positive integers satisfy a^3+b^3=c^3 ?

*November 6, 2014*

**math please help**

Suppose that ice cream consumption per person at parties is normally distributed with a mean of 0.39 gallons, and a standard deviation of 0.26 gallons. If you are throwing a party with 33 guests, how much ice cream do you need to buy to make sure that the probability of having...

*October 24, 2014*

**math**

HELP HELP PLEASE The University of Townville gives a full scholarship to any student who scores in the top 4% of students on the SMRT standardized exam. SMRT scores have a mean of 260 and a standard deviation of 22. What score does a student need to attain in order to receive ...

*October 20, 2014*

**Math**

Is 0.600 kg lighter than 1.00kg?

*October 7, 2014*

**Physics**

A 0.600-kg ball traveling 4.00 m/s to the right collides with a 1.00-kg ball traveling 5.00 m/s to the left. After the collision, the lighter ball is traveling 7.25 m/s to the left. What is the velocity of the heavier ball after the collision?

*October 7, 2014*

**Physics-Intro**

A 0.600-kg ball traveling 4.00 m/s to the right collides with a 1.00-kg ball traveling 5.00 m/s to the left. After the collision, the lighter ball is traveling 7.25 m/s to the left. What is the velocity of the heavier ball after the collision?

*October 7, 2014*

**Values**

Why do teenagers rebel?

*October 7, 2014*

**Math**

let s(t)= t^4-4t^3+8t for 0 ≤ t ≤ 4 find the total distance traveled by the object. find where the acceleration is positive.

*October 5, 2014*

**math help**

Which is equivalent to 14x-3y+2z=100 -17x+8y+10z=11 -3+13y+29z=81

*May 19, 2014*

**Chemistry**

The observed general trend in ionization energies shows two slight discontinuities in each period. Examine the electron configuration at these points and explain why such a discontinuity may occur.

*April 9, 2014*

**Social Studies**

I know his ideals,but I don't know how should I write about the reality? For example, october crisis, can you give me an idea how does october crisis affect his ideals?

*March 11, 2014*