Monday

January 23, 2017
Total # Posts: 1,276

**physics**

safiya places a 5.o-kilogram brick on chair in the classroom.the chair is 1.o meter off the ground.what is the gravitation potential of the brick if it falls off the chair?remember that gravity equals 9.8 meter per second squared.

*March 9, 2011*

**reading**

what is a metaphor using a time you were tired?

*March 3, 2011*

**reading**

what is a simile using a neighborhood cat?

*March 3, 2011*

**physics**

wow you are smart because you figure out your own queston

*March 3, 2011*

**Physics**

a) 13.456 m/s b)?

*March 2, 2011*

**Math**

The results of a medical test show that of 66 people selected at random who were given the test, 3 tested positive and 63 tested negative. Determine the odds in favor of a person selected at random testing positive on the test.

*February 27, 2011*

**7th grade math worksheet**

a robber ducky

*February 17, 2011*

**maths**

what is 0.68 into a fraction

*February 15, 2011*

**maths**

twenty-seven out of thirty students have a mobile work out the percentage of students who do not have a mobile phone! show each stage of working out? THANKYOU

*February 15, 2011*

**maths**

please someone answer

*February 15, 2011*

**maths**

four teenagers collected a total of £64 for charity. each teenager collected a whole number of pounds. the modal amount collected was £16. the range of the amounts collected was £2. work out how much each teenager collected?

*February 15, 2011*

**science**

david alteration is 20 divide by 0.4 which is 50!

*February 15, 2011*

**Geometry**

A road climbs at an 8 degree angle with the horizontal. What is the grade of the Road.

*February 10, 2011*

**math**

a store recorded net sales of 423,400 for the year.the store's beginning inventory at retail was105,850 and it's ending inventory was127,020. what would be the inventory turnover at retailrounded to the nearest tenth? i have no idea what i am doing.

*February 6, 2011*

**math**

calculate the monthly payment by loan amotization table: loan 26,000, down payment of 5,000 at 11% for 36 months

*February 5, 2011*

**math**

3x+4y=-22

*February 4, 2011*

**math**

solve this in 3 variables.. i don't know where to start,,:(( y/4+z/3-x/2=4 y/2-x/6+z/15=2 y/8+z/5-x/3=2

*January 15, 2011*

**Physics**

A speedy tortoise can run at .01 meters per second, and the hare can run 21 times as fast. I. A race they start at the same time, but the hare stops for 1.5 minutes so the tortoise wins by a shell(20cm). How long is the race? How long is the path?

*January 13, 2011*

**Biochemistry**

What is the new pH when 1mL of 1M HCl os added to 5mL of 0.1M Phosphate buffer (pH 7.4)?

*January 13, 2011*

**Biochemisty**

The TRIS-HCl buffer is 0.1 M.

*January 12, 2011*

**Biochemisty**

If I take 5mL of a TRIS/HCL buffer with a pH of 7.4 and add 1mL of 1M HCL, how do I determine the new pH?

*January 12, 2011*

**Biochemistry**

How do you prepare 100 mL of a 0.1 M TRIS-HCl buffer with a pH 7.4 using solid TRIS base (MW 121.1) and 1 M hydrochloric acid? I started with pH=pKa + log ([Tris]/[Tris+] [Tris]/[Tris+]= 10^(7.4-8.06]=0.219 so 0.219:1 ratio with 2.219 total [Tris}=(0.219/1.219)*0.1 M= 0.018 M...

*January 5, 2011*

**unscramble spanish words**

i don't kno

*January 2, 2011*

**Physics**

How much work(energy) is needed to lift an object that weighs 200N to a height of 4m? My question: is weight the same as force? if not, how do I find the amount of force

*December 17, 2010*

**english: greek mythology**

In the story Prometheus (he steals fire and gives it to humans), What human qualities do Prometheus and Zeus have? What is the significance of these gods having human qualities? please just point out a few qualities for each and some quotes that show examples of them- bullet ...

*December 16, 2010*

**Physics**

The F-14 Tomcat lands on aircraft carriers at a speed of 145 mph. The carriers capture system stops the aircraft within 2 seconds. What is the F-14's acceleration rate? in m/s^2?

*December 2, 2010*

**Physics**

The 2010 Mustang GT accelerates from 0 to 60 mph in 5.2 seconds. What is the acceleration rate? in m/s/s?

*December 1, 2010*

**algebra**

add 2y to both sides so that you get x alone: x=4y-8

*December 1, 2010*

**5th grade math**

64 # of photos on a page is 4 4+60=64 64/4=16 to get 4 as the # of photos, since it must be a 1 digit # you can use trial and error

*November 30, 2010*

**Math**

It's called a venn diagram

*November 30, 2010*

**geometry**

what is 5-y=3/4x in slope intercept form?

*November 30, 2010*

**Math**

I DON'T GET THE MINUSES IN THIS ONE? PLEASE HELP????

*November 30, 2010*

**chemistry**

A mixture of 8.00 g He and 26.5 g Ne has a pressure of 820. mm Hg. What is the partial pressure of each of the gases?

*November 30, 2010*

**math**

if 1/4=40, then 2/4=80, and 2/4 is the same as 1/2

*November 29, 2010*

**geometry**

I'm pretty sure they do. I also got 40-gon

*November 29, 2010*

**geometry**

if the measure of each exterior angle is 9, what type of polygon is it?

*November 29, 2010*

**Math**

The implied domain of f (x) = square x+5 is?

*November 28, 2010*

**Algebra**

2x^2+10x+7=0 factor this problem out

*November 19, 2010*

**math**

20 copies of the school yearbook together weigh 50 lb. What is the weight of each book? How do I set this up?

*November 19, 2010*

**Math**

it's asking what the measure of each angle is. subtract 56 from 180, divide by 2, add 56 to one of them, and that's your answer

*November 16, 2010*

**geometry**

what is 2x+6y=6 and 3/4x-1/2y=1/8 in slope intercept form?

*November 16, 2010*

**geometry**

what is 8x+4y=16 in slop intercept form?

*November 16, 2010*

**2nd grade**

spatial thinking which number comes 10 after 76 on the 100 chart? a- 77 b- 85 c-86 d- 87

*November 16, 2010*

**Physics**

what propels a rocket away from the surface of the earth?

*November 14, 2010*

**Physics**

what propels a rocket away from the surface of the earth?

*November 14, 2010*

**Physics**

does a baseball thrown at 100 miles per hour have a lot of force?

*November 14, 2010*

**Physics**

is a collision an example of an interaction?

*November 13, 2010*

**Physics**

Which of the following forces does NOT have a zero work done on the object. Choices The normal force on a box that slides across a horizontal level floor. The weight on a box that slides across a horizontal level floor. The normal force on a box that slides down an inclined ...

*November 11, 2010*

**physics**

A person bends over, and lifts an object of mass m = 28.5 kg while keeping the back parallel with the floor. The muscle that attaches 2/3 of the way up the spine maintains the position of the back. This muscle is called the back muscle or latissimus dorsi muscle. The angle ...

*November 11, 2010*

**2nd grade**

it is greater than 43 less than 52 if you add digits the sum is 8 write the number word

*November 11, 2010*

**12th grade Trig**

What are the period and 2 consecutive asymptotes? 1. y= -3tan pi x 2. y= 2 sec 4 x 3.y= csc x/3 4.y = 3cot pi x/3

*November 10, 2010*

**math**

the next three terms are 70,87,106. the pattern is adding consecutive odd numbers to each term. ex: 15+7=22, 22+9=31, 31+11=42, 42+13=55 and so on.

*November 10, 2010*

**4th grade math**

either 3,344 or 3,322

*November 9, 2010*

**Physics**

Please help! How long would it take (in seconds) to travel 1 km at a speed of 100 km/h?

*November 9, 2010*

**4th grade math**

1001 or 999

*November 9, 2010*

**Math**

convert both of them to improper fractions and multiply them normally.

*November 9, 2010*

**4th grade**

Either 45 or 54

*November 9, 2010*

**Physics**

How long would it take (in seconds) to travel 1 km at a speed of 100 km/h?

*November 9, 2010*

**Physics**

A roller-coaster vehicle has a mass of 506 kg when fully loaded with passengers (see figure). (a) If the vehicle has a speed of 22.0 m/s at point A, what is the force of the track on the vehicle at this point? (b) What is the maximum speed the vehicle can have at point B in ...

*November 4, 2010*

**Physics**

point A, r=10m and point B, r=15m

*November 4, 2010*

**Physics**

A roller-coaster vehicle has a mass of 506 kg when fully loaded with passengers (see figure). (a) If the vehicle has a speed of 22.0 m/s at point A, what is the force of the track on the vehicle at this point? (b) What is the maximum speed the vehicle can have at point B in ...

*November 4, 2010*

**Math**

Light travels at a speed of about 186,000 miles per second. Sound travels at a speed of about 1,087 feet per second. How many times faster light travels than sound.

*November 3, 2010*

**english**

sometimes i be so tired can't nobody wake me up.

*November 1, 2010*

**Chemistry**

In a gas expansion, 69 J of heat is absorbed from the surroundings, and the energy of the system decreased by 118 J. Calculate the work done. _______ J

*October 31, 2010*

**chemistry**

If 150.0 f of sulfuric acid is spilled, what is the minimum number of moles of sodium carbonate have to be added to complete reaction

*October 30, 2010*

**poetry part 1**

nature

*October 28, 2010*

**math**

okay but I thought when it was traslated over the yaxis that the negitive went insixde the (-) not ouside like so -()

*October 28, 2010*

**math**

Square root of x is the equation. Translate: down seven reflected over y axis left five ANSWERS: square root of negitive x+5)-7 negitive square root of x+5)-7 square root of x-5)-7 square root of x+5)+7 IM not getting any of these HELP!!!

*October 28, 2010*

**Pre Calc!!!!!!!!!! test tom!!**

Square root of x is the equation. Translate: down seven reflected over y axis left five ANSWERS: square root of negitive x+5)-7 negitive square root of x+5)-7 square root of x-5)-7 square root of x+5)+7 IM not getting any of these HELP!!!

*October 27, 2010*

**Physics**

Well I saw on a related problem someone wrote: Package height Y at drop time t is Y = 120 + 5 t - 4.9 t^2 Set Y = 0 and solve. but I have no idea what that means...

*October 24, 2010*

**Physics**

For some reason I keep getting this problem wrong. Please Help! A helicopter is ascending vertically with a speed of 9.00 m/s. At a height of 90 m above the Earth, a package is dropped from a window. How much time does it take for the package to reach the ground?

*October 24, 2010*

**math**

-2(x+3)=-24

*October 24, 2010*

**Chemistry**

Determine the mass of zinc sulphide, Zns which is produced when 6.2 g of zinc and 4.5 g of sulphur are reacted. My answer was 9.26 grams of zinc sulphide are produced. I wanted to verify if this was right. Please let me know. Thanks.

*October 19, 2010*

**CHEMISTRY**

You subtract the moles of NaoH from the moles of HCl to determine the excess moles left, which decides the pH. To find pH, pH= -log(concent. of H+) or ( concen. of OH-) If NaOH is more than HCl, you get find pH by subtracting the pOH you get from the above formula from 14.

*October 17, 2010*

**Foods**

This item also cooks vegetables and fruits so I don't think its a blender. Thanks anyway!

*October 17, 2010*

**Foods**

what cooking tool is used to make sauces which do not contain milk? I know I have asked this question already but I have still not a found very good answer. The sites that people have gave me are not helping infact they are just showing me how to cook sauce or other stuff, not...

*October 17, 2010*

**Foods**

Thank you very much for helping me Ms.Sue, BobPursley and Writeacher. Thanks!!:):):):):):):):):):):):)

*October 16, 2010*

**Foods**

I think I have mostly all the answers to my questions though I don't know if they are right. Any ways my last question is: what is used to cook vegetables and fruits, and to make sauces which do not contain milk? Please try to answer my other questions as well. I do not ...

*October 16, 2010*

**Foods**

I clicked the site and all it showed me was a picture. why? Can you please just list me the items I need, and not give me any sites. It will be very helpful.

*October 16, 2010*

**Foods**

I am pretty sure #5 is a pasrty blender and #4 is a grater. Am I right? I checked the site you gave me but I couldn't find anything- it was a bit difficult for me. Please help me I beg you!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

*October 16, 2010*

**Foods**

I have no choices. Answers I have: 1.rolling pin 2.sauce pan 3.metal spatuala 4.paring knife 5.? 6.? 7.? 8.?

*October 16, 2010*

**Foods**

what is used to knead dough and to roll pastry ? what is used to cook some less tender meats,to steam puddings and to asselerate the cooking time of foods? what is used to sift flour before measuring? what kind of knife is used to very finely slice or crumb foods? what is used...

*October 16, 2010*

**math**

the answer to h+5h=48 is 44

*October 14, 2010*

**5th grade English**

yes it does

*October 14, 2010*

**physics**

hello, I need some help with this work problem that goes... If the height of a helicopter above the ground is given by h=3.25t^3, where h is in meters and t is in sec. After 1.50s, the helicopter releases a small mailbag. How long after its release does the mailbag reach the ...

*October 5, 2010*

**physics**

a = (deltav)/t = (d/t)/t =(400/10) / 10 =4m/s :)

*October 3, 2010*

**Maths - trig**

Solve 3cos2x - 7cosx = 0, when 0<=x<=360 And also, find the exact values for x when 0<=x<=360 if 3tan^2x=1 Thankyou!

*October 3, 2010*

**physics**

Devon : a = F / m Effective F = upward force - downward force (weight) = 11- 15.5 = 4.5 downward a = 4.5/ (15.5/9.8) = 2.8 m/s downwards. (I'm pretty sure anyway)

*October 3, 2010*

**physics**

Yes if the upward force is less than gravitythen the acceleration would be downward, but it wouldn't be negative as it's not a deacceleration. :)

*October 3, 2010*

**Chemistry**

Balance the eqn Na2CO3 + 2HCl -> 2NaCl +H20 + CO2 From the balanced eqn you can see that one mole of CO2 is produced. Then at stp 1 mole of gas takes up 24 litres (I think, check this on google) therefore v= 24 litres. :)

*October 3, 2010*

**PIs 267**

How much work is need to raise a 110 kg loag of bricks 12m above the ground

*September 29, 2010*

**geometry**

Solve the equation for x. -5x = 3 + y is it x = (3+y)/-5

*September 29, 2010*

**Math**

wait there is no x after the seven its just 3x + 23 = 7 so x = ?what?

*September 29, 2010*

**Math**

If triangle XYZ is equilateral and the length of one side is 7.5, what is the perimeter of XYZ and what is the measure of each angle?

*September 29, 2010*

**Math**

Soda comes in packs of 6. Candy comes in 4 bags per pack. What is the least number of each pack (Soda and Candy) she must buy to have exactly one soda per bag of candy?

*September 28, 2010*

**6th grade, social studies**

who is discussed in the biography feature of chapter 6,lesson 1

*September 27, 2010*

**Math**

How is 3x2 different from 3 to the 2nd power ?

*September 21, 2010*

**chemistry**

You mix 2.0 mL of 0.50 M Cu(NO3)2 with 5.0 mL of 0.50 M KI, and collect and dry the CuI precipitate. Calculate the following: a) Moles of Cu(NO3)2 used b) Moles of KI used c) Moles of CuI precipitate expected from Cu(NO3)2 d) Moles of CuI precipitate expected from KI

*September 20, 2010*

**Physics**

thank you. can you help me solve another?

*September 19, 2010*

**Physics**

Two cars travel at the same constant speed. The first car travels for 10 minutes, the second for 27 minutes. If the second car travels 18 miles farther that the first, how far does each car travel?

*September 19, 2010*