Friday

December 19, 2014

December 19, 2014

Total # Posts: 75,719

**Science**

i am using a caliper to measure the skull of a mouse
*November 22, 2014*

**Science**

uncertainty for a tenth of a mm?
*November 22, 2014*

**Science**

what is an uncertainty? From reading the internet, is it a way to express potential error and that the actual value is between +/-#? what would be the uncertainty for this: electronic balance measuring to the tenth of a gram? is it +/- 0.05?
*November 22, 2014*

**maths**

If the cost of 2 score pens is 280, then the cost of 2 dozen pens will be?
*November 22, 2014*

**Reading-yes,this is the article**

"Is Facebook making us lonely" Just to check my understanding on this article,I decided to write a summary.. Please check by reading this article.. Basically the author is trying to say that Facebook connects people with each other but it does not bond people ...
*November 22, 2014*

**Math**

how did you work this out please ?
*November 22, 2014*

**Math**

Resolve in partial fractions (x+6)/((x^2+1)(x-2)^2) Using let x = ...
*November 22, 2014*

**Math**

The fourth term of A P is 37 and the 6th term is 12 more than the fourth term.find the first and the seven terms
*November 22, 2014*

**Physic**

Two wave pulses on a string approach one another at the time t = 0, as shown in the figure below, except that pulse 2 is inverted so that it is a downward deflection of the string rather than an upward deflection. Each pulse moves with a speed of 1.0 m/s. Make a careful sketch...
*November 22, 2014*

**MATH**

Kyle is making a model of an Egyptian pyramid for his history class. Each side of the pyramid he makes has a base of 18.6 cm and height 14.8 cm. Calculate the height of Kyle's pyramid to the nearest tenth of a centimeter. Don't I need an angle to calculate this? I don...
*November 21, 2014*

**Math**

A tightrope walker attaches a cable to the roofs of two adjacent buildings. The cable is 23.5 m long. The angle of inclination of the cable is 13 degrees. The shorter building is 12.0 m high. What is the height of the taller building to the nearest tenth of a metre? I tried ...
*November 21, 2014*

**Reading**

"Is Facebook making us lonely" Just to check my understanding on this article,I decided to write a summary.. Please check by reading this article.. Basically the author is trying to say that Facebook connects people with each other but it does not bond people ...
*November 21, 2014*

**science**

which of the following shows the path followed by nerve impulses in a reflex motor neurons,interneurons in brain,sensory neurons or sensory neurons,interneurons in brain, motor neurons
*November 21, 2014*

**Math Help!!!**

-9
*November 21, 2014*

**math**

15 in long
*November 21, 2014*

**Physics**

Thank you, but the centripetal acceleration is wrong, 2.95 m/s^2 is wrong.
*November 21, 2014*

**Physics **

A marble rolls down an incline of 30 degrees. If the marble is initally at rest at the top of the incline of length 2.0 meters what will the speed of the marble be at the bottom of the incline (a) if the incline is rough enough to prevent any slipping [ it rolls],then (b) if ...
*November 21, 2014*

**Math Help!!!**

define each term and give at least 2 examples of each whole numbers natural numbers integers rational numbers irrational numbers
*November 21, 2014*

**math**

write the folowing in ascending order:2/3, 1/2, 4/5, 7/20
*November 21, 2014*

**algebra 2**

12x^2-2x-2=0
*November 21, 2014*

**Question**

What can be in a Manipulative &Math Center
*November 21, 2014*

**math**

You get 2 imaginary solutions x=12.5+706.9962871189636i x=12.5−706.9962871189636i
*November 21, 2014*

**Question**

What are Behavioral Objective for a Hopscotch
*November 21, 2014*

**Math**

The product of Greg's age and 5 is 55 Use the variable G to represent Greg's age
*November 21, 2014*

**Math**

A group of scientists found a new species of spider in the desert. The body temperature of the spider appears to vary sinusoidal over time. A maximum body temperature of the spider reaches 125? after 15 minutes from the start of the examination. Then, 14 minutes later, the ...
*November 21, 2014*

**Physics**

A 24.5-kg child is standing on the outer edge of a merry-go-round which has moment of inertia 989 kg • m2 and radius 2.40 m. The entire system is initially rotating at 0.180 rev/s. Find the angular velocity if the child moves to a final position 1.10 m from the center of ...
*November 21, 2014*

**MAth Help**

The function f(t)=22sin(piT/3 -5)+80 is used to represent the changes in temperature of a chemical compound used in a lab. What is the vertical shift? I got the answer of 6. Is this correct?
*November 21, 2014*

**math**

And its maximum temperature, I got 25 celcius.
*November 21, 2014*

**math**

The temperature in your house is controlled by a thermostat. The temperatures will vary according to the sinusoidal function:f(x)=6sin(pi/12(x-11)+19, where f(x) represents the temperature in degrees Celsius (°C) and x is hours since midnight. What is the temperature of ...
*November 21, 2014*

**Spanish Practice--Plz help?**

Well..I'm really stuck on this.
*November 21, 2014*

**Spanish Practice--Plz help?**

Use the six Spanish terms below to write about something in a traditional classroom. Make sure to use the correct number(s) for the nouns and the correct present tense form of the verb. mochila cartel los las the verb estar en
*November 21, 2014*

**math**

Your 2pi/7 t is correct. To get the max height of 80 with a radius of 20, you need 20sin(2pi/7t)+60 It could also be a cosine function, or either sine or cosine with a phase shift. Your pure sine function indicates that at t=0, the chair is level with the axle of the wheel.
*November 21, 2014*

**please help**

i posted at 12:00 about math... please help for my son.
*November 21, 2014*

**math**

1/4 + 3/16 + x = 5/8 4/16 + 3/16 + x = 10/16 x = 3/16
*November 21, 2014*

**math**

terrence's brother decided to share some pizza with terrence and his sister. if terrence ate 1/4 of the pizza, his brother ate 3/16 of the pizza, and altogether the three ate 5/8 of the pizza, how much did the sister eat?
*November 21, 2014*

**Physics**

since v^2 = 2GM/r, replacing with the new values gives a new v, with the ratio vnew^2/vold^2 = 2G(.64M)/(.9r) / 2GM/r = 0.711 So, vnew/vold = 0.84
*November 21, 2014*

**Science**

If you draw a diagram, you will see that the first two vectors form two sides of an equilateral triangle. So, the angle between them is 120 degrees.
*November 21, 2014*

**math**

dont know
*November 21, 2014*

**physics**

note ... find acceleration by using distance and time (ignore ”incline” ... just treat it like linear motion of object starting from rest). A 1.8 kg mass starts from rest and slides down an inclined plane 8.8×10−1 m long in 0.54 s. What net force is ...
*November 20, 2014*

**English**

Where's the prepositional phrase in this sentence From June until the end of August, Carl lives in Alabama
*November 20, 2014*

**physics**

A 67.0 kg ice skater moving to the right with a velocity of 2.02 m/s throws a 0.12 kg snowball to the right with a velocity of 21.5 m/s relative to the ground. (a) What is the velocity of the ice skater after throwing the snowball? Disregard the friction between the skates and...
*November 20, 2014*

**Science**

50 ml of ethyl alcohol amd 40ml of water combined in a beaker add up to 90ml of liquid why is this? (Particle theory)
*November 20, 2014*

**physics**

if a bird travels 150 cm for 10 sec then 100 cm for 10 sec and then 200 cm for 5 sec. What was the birds average speed?
*November 20, 2014*

**physics**

A 278 g particle is released from rest at point A inside an smooth hemispherical bowl of radius 36.5 cm, as shown below. (a) Calculate the gravitational potential energy at A relative to B. J (b) Calculate the particle's kinetic energy at B. J (c) Calculate the particle&#...
*November 20, 2014*

**physics**

Tarzan swings on a 23.2 m long vine initially inclined at an angle of 22° from the vertical. (a) What is his speed at the bottom of the swing if he starts from rest? m/s (b) What is his speed at the bottom of the swing if he starts with an initial speed of 2.58 m/s? m/s
*November 20, 2014*

**math**

log4(x-3)=2 4^2=x-3 16=x-3 19=x Does this mean the solution would be x=19 or no solution? How would I check this to know if 19 is a solution. I know I plug it back in. Like so: log4(19-3)=2 4^2=19-3 16=16 Did i check correctly?
*November 20, 2014*

**Pre Algebra**

Never Say Die!
*November 20, 2014*

**Math**

Jose runs at average of. 6 miles per hour.he runs everyday for 30 minutes.how many miles does Jose run a week
*November 20, 2014*

**English**

What might be some character traits of Montresor in The Cask of Amontillado? I can't come up with anything except cruel.
*November 20, 2014*

**science**

any science projects??? please help!!!
*November 20, 2014*

**chemistry**

One teaspoon of instant coffee ( 3 grams ) is dissolved in 250 grams of water. What percent of the resulting solution is coffee ?
*November 20, 2014*

**Stastic=tics**

You are staffed with 2 inpatient coders. Your current productivity level for your coders is 3 charts per hour. Your hospital discharges has increased to an average of 75 charts per day. Compose a request for additional coding staff.
*November 20, 2014*

**English**

What might be some character traits of Montresor in The Cask of Amontillado? I can't come up with anything except cruel.
*November 20, 2014*

**geography**

The Indian National Congress and the Muslim League were both
*November 20, 2014*

**chemistry**

what is the partial pressure of hydrogen in a flask containing 2g hydrogen and 32g sulphur dioxide
*November 20, 2014*

**CAT, mathematics literacy , business studies ,hist**

Careers linking to these subjects :CAT, maths lit , business studies and history
*November 20, 2014*

**math**

a rectangular bathroom measures 9.5 feet by 12 feet. the floor is covered by rectangular tiles measuring 1.5 inches by 2 inches. how many tiles are there on the bathroom floor.
*November 20, 2014*

**Physics**

new package moving system in the new improved post office consists of a large circular disc which rotates once every 5 seconds at a constant speed in a horizontal plane. packages are put on outer edge of turntable on one side of room and removed on opposite side. coefficient ...
*November 20, 2014*

**physics**

a certain tower is 40 m tall. a man drops a lanzones from the top of onto the head of his enemy. if the enemy is walking at a speed of 1.2 m/s, ho many meters should the enemy be from the position below the lanzones when it is dropped ?
*November 20, 2014*

**Physics**

object of mass 2 kg is attached to string and rotate in vertical circle of radius 1 m. at highest point it has velocity of 4 m/s. what is tension in string at that point. at lowest point it is .5 m above ground. if string breaks at highest point how far does it travel ...
*November 20, 2014*

**Algebra please help**

(15 mi/h) x (5,280 ft/mi) x (1h/3,600s) = 22ft/s
*November 20, 2014*

**Physics**

-1440 J
*November 20, 2014*

**south mountain community college**

A poster is to have an area of 210in^2 with 1 inch margins at the bottom and sides and a 2 inch margin at the top. Find the exact dimensions that will give the largest printed area.
*November 20, 2014*

**Math**

You have the price of 2 different cars one 17,000 the other 23,000 one gets 22mpg and the other 50 mpg at 3.00 a gallon how long will it take until you have spent more on the one that gets 22 mpg than the one that gets 50 mpg?
*November 20, 2014*

**algebra**

what is the graph of the system ?y<-x-1 y>x+4
*November 19, 2014*

**Algebra, help please!!!**

Are you guys doing mean median mode and range
*November 19, 2014*

**Algebra, help please!!!**

Subtract
*November 19, 2014*

**Business Communication**

Do you think that I should assume the news is bad by the choices given?
*November 19, 2014*

**Algebra**

The income from a student production was $15,000. The price of a student ticket was $3, and nonstudent tickets were sold at $5 each. Four thousand tickets were sold. How many tickets of each kind were sold?
*November 19, 2014*

**Math**

How do I solve for x in: 1/x > x I need to do it both algebraically and graphically, but I'm not sure how to do so. Thanks!
*November 19, 2014*

**Spanish--1 question pllz?**

Use the six Spanish terms below to write about something in a traditional classroom. Make sure to use the correct number(s) for the nouns and the correct present tense form of the verb. mochila cartel los las the verb estar en
*November 19, 2014*

**HISTORY **

How many states and territories was a part of the United States in 1890? What new states and territories was a part of the United States in 1920 which were not part of the United States in 1890?
*November 19, 2014*

**Math**

How do I solve for x in: 1/x > x I need to do it both algebraically and graphically, but I'm not sure how to do so. Thanks!
*November 19, 2014*

**Algebra 2**

let f(x)=7x+4 and g(x)= 3x-9 g(f(x))
*November 19, 2014*

**Algebra Two**

let f(x)=7x+4 and g(x)= 3x-9 f(x)*g(x)
*November 19, 2014*

**Math**

To have no decimals
*November 19, 2014*

**Math**

What does 24.305 round to
*November 19, 2014*

**Algebra 2 **

Simplify 2x*x^7/4
*November 19, 2014*

**French**

I have a couple of questions. Is this a correct way of saying I like to ride a bike in the summer? Do I need an article before été? En été, j'aime faire du vélo. Is l'opération male or female? How do you say I like to visit ...
*November 19, 2014*

**English**

The first one is c
*November 19, 2014*

**English**

for which one
*November 19, 2014*

**English**

All of the following plural nouns except a.flies b.themselves. c. ladys. d.proofs I am think d All of the following compound nouns are correct except a.editors in chief. b.sons-in-law. c.bird watchers. d.mother-in-laws. I am think b or d
*November 19, 2014*

**Math**

what is the solution to the system of equations? 5x + 4y = 8 x - 2y = 10 (not multiple choice) my answer: (-5, -1) What are the missing values? (coincident) 4x + 5y = 8 8x + ____ y = _____ (Not multiple choice) Im not sure how to do this one collection of dimes and nickels is ...
*November 19, 2014*

**Math Help!!!**

your wrong the first one is 9
*November 19, 2014*

**Math Help!!!**

all of them
*November 19, 2014*

**Math Help!!!**

can you check them?
*November 19, 2014*

**Math Help!!!**

Russell Grossman is training for the Olympics. He wants to know the distance across lake royal, so he can write in his training logbook how far he rows each day. If from one point on the shore to one side of the lake is 13 km and from the same point to another side of the lake...
*November 19, 2014*

**child developement**

compare 3 children 4 years, 18 months, 10 years to physical or cognitive growth
*November 19, 2014*

**chemistry**

12.5g mass of the vinegar sample and the density of vinegar is 1.05g/mL determine the volume of the vinegar sample in liters?
*November 19, 2014*

**maths**

diameter of a ferris wheel is 15 metres. how far does a seat on the ferris wheel travel in 5 revolutions
*November 19, 2014*

**chemistry**

You measure Ksp for borax and find it to be 6.2 x 10-3 at 22.8°C. If the standard enthalpy change, ΔH°, for the dissolution of borax is 58 kJ, calculate the standard entropy change, ΔS°, (in J/K) for the dissolution of borax at this temperature. (Assume...
*November 19, 2014*

**chemistry**

You measure Ksp for borax to be 7.8 x 10-3 and 2.9 x 10-3 at 23.6°C and 1.8°C, respectively. Calculate the standard enthalpy change, ΔH°, (in kJ) for the dissolution of borax.
*November 19, 2014*

**Calculus (PLEASE HELP ASAP!)**

Find f(x) satisfying the given conditions: 1) f"(x) = 1/x^3 f'(1) = 1/2 f(1) = 0 2) f"'(x) = sin (x) f"(0) = 0 f'(0) = 1 f(0) = 0
*November 19, 2014*

**English**

As it rained heavily, the playground was muddy.
*November 19, 2014*

**math**

who makes rainwater mix with dirt?
*November 18, 2014*

**chemistry**

if 10.5 moles of CH4 react with oxygen, what is the volume of CO2 (in liters) produced at 20.9 degrees celsius and 0.951 atm?
*November 18, 2014*

**math**

determine the resulting equation if one variable is solved in terms of the other variable in one equation and substitute this variable in the other equation. 1.) 2x+5y=9 -x+y=2 2.) 3x+y=2 9x+2y=7 3.) x-y=-3 3x +y=19
*November 18, 2014*

**math**

start out with what you know -so you have a total of 50 coins -a quarter is equal to 25c -a nickel is eqal to 5c 0.25*4=$1.00 0.25*12=$3.00 0.25*16=$4.00 0.25*20=$5.00 0.05*20=$1.00 20+16=36 50-36=14 This might help
*November 18, 2014*

**English**

Sentence 7
*November 18, 2014*

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