Monday

December 22, 2014

December 22, 2014

Total # Posts: 75,770

**physics**

It's due in 5 minutes just tell me the answer.
*November 23, 2014*

**physics**

A 1.2kg lead ball is launched off a cliff top at 16m/s at an angle of 20 degrees above the horizontal. The height of the horizontal is 15m. Determine the net force acting on the lead ball that caused the ball to drop 4.0m from point P.
*November 23, 2014*

**chem**

If a sample of gas has a volume of 8.20
*November 23, 2014*

**math**

(1/3)/(7/9)=0.428... 9/21=0.428... yes this is correct! :)
*November 23, 2014*

**Chemistry**

If 120. grams of KClO3 reacts, how many grams of oxygen are produced?
*November 23, 2014*

**Probability**

You have a blind date with a physics major. From your social networking experience, you know that 10% of physics majors are immature, 50% are narcissistic, and 90% are boring. Assume that immaturity, narcissism, and boringness are independent events. Calculate the probability ...
*November 23, 2014*

**statistics**

You have a face-to-face statistics class in the traditional classroom setting. There are 25 males and 45 females enrolled. You’re the instructor so you like to arrive in the classroom before the first students arrive. What is the probability that the first student who ...
*November 23, 2014*

**statistics**

An introductory psychology class has 9 freshman males, 15 freshman females, 8 sophomore males, and 12 sophomore females. If one student is randomly selected from this class, what is the probability of selecting a female? Round to the nearest hundredths place if a fraction
*November 23, 2014*

**Geometry**

Emalee, there is no picture to go with this question. Please share so I can help you!
*November 23, 2014*

**physics**

A sled on ice moves in the ways described in the questions below. Friction is so small that it can be ignored. A person wearing spiked shoes standing on the ice can apply a force to the sled and push it along the ice.Which force would keep the sled moving toward the right and ...
*November 23, 2014*

**Chemistry**

Draw all of the possible alkyne isomers of CH≡CCH2CH2CH2CH3.
*November 23, 2014*

**Health And Physical Ed**

All of them
*November 23, 2014*

**physics**

Air at 1 atm is inside a cylinder 17.9 cm in radius and 17.9 cm in length that sits on a table. The top of the cylinder is sealed with a movable piston. A 24.1-kg block is dropped onto the piston. a) From what height above the piston must the block be dropped to compress the ...
*November 23, 2014*

**American Government**

When Congress prepares a budget
*November 23, 2014*

**Mechanical Behavior of Materials**

400
*November 23, 2014*

**physics. I waited over two days for response**

An 800kg police boat slows down uniformly from 50km/h (E) to 20km/h(E) as it enters a harbour. If the boat slows down over a 30m distance, what is the force of friction of the boat? (Hint: you will need to convert the velocities into m/s) please show your work.
*November 23, 2014*

**Calculus**

Use Riemann sums and limits to compute the area bounded by f(x) = 10x+9 and the x axis between x=10 to x =5 The area is = to
*November 23, 2014*

**maths**

so 4n-1 9th term would be 35 and 10th term would be 39. The sum is 74. I'm in grade four. I just figured it out.
*November 23, 2014*

**Science PLEASE HELP**

How does Exothermic and Endothermic reactions affect the rate of a reaction? Please help. I need something that will be easy for me to understand and adopt into my own words. Thank You :)
*November 23, 2014*

**Science**

How does Exothermic and Endothermic reactions affect the rate of a reaction? Please help. I need something that will be easy for me to understand and adopt into my own words. Thank You :)
*November 23, 2014*

**Stats**

21.4 A student survey. Tonya wants to estimate what proportion of the students in her dormitory like the dorm food. She interviews an SRS of 50 of the 175 students living in the dormitory. She finds that 14 think the dorm food is good.
*November 23, 2014*

**Chemistry**

A student was given a 2.45 g of impure potassium sulfate (K2SO4) sample. He dissolved this sample in 100 mL of water first and then added some barium chloride (BaCl2) solution. A 2.15 g of BaSO4 precipitate was obtained at the end of the reaction. What is the percent purity of...
*November 22, 2014*

**physics**

Consider a very small hole in the bottom of a tank that is 17.0 cm in diameter and filled with water to a height of 90.0 cm. Find the speed at which the water exits the tank through the hole. A) 48.3 m/s B) 44.1 m/s C) 17.64 m/s D) 4.20 m/s
*November 22, 2014*

**physics**

When a container of water is placed on a laboratory scale, the scale reads 120 g. Now a 20-g piece of copper (of density 8.9 g/cm3) is suspended from a thread and lowered into the water, not touching the bottom of the container. What will the scale now read? The density of ...
*November 22, 2014*

**Excel**

I know how to insert error bars in the bar graph on Google spreadsheet, but for some reason I couldn't, due to the drop-drown of the series section consisting of only column 1 and not the other.How can i fix this problem?
*November 22, 2014*

**Question**

That not helping me
*November 22, 2014*

**Question**

Describe what children while children playing would learn in a block center
*November 22, 2014*

**Chemistry**

Rates of Reactions I am conducting a experiment on increasing the rate of a reaction by increasing the surface area. For this I am reacting hydrochloric acid and marble chips. Variables:- -Independent: the mass of marble chips -Dependent: The volume of gas -Controlled: Temp of...
*November 22, 2014*

**Chemistry**

Rates of Reactions I am conducting a experiment on increasing the rate of a reaction by increasing the surface area. For this I am reacting hydrochloric acid and marble chips. Variables:- -Independent: the mass of marble chips -Dependent: The volume of gas -Controlled: Temp of...
*November 22, 2014*

**Biology**

Would glucose be considered a reactant in glycolysis? Also, some sites are saying that 4 ADP molecules are also reactants, but I don't understand how?
*November 22, 2014*

**Physics**

A 4.0-kg cylinder of solid iron is supported by a string while submerged in water. What is the tension in the string? The density of iron is 7860 kg/m3 and that of water is 1000 kg/m3. A) 34 N B) 2.5 N C) 24 N D) 40 N E) 20 N
*November 22, 2014*

**chemistry due soon**

I agree.
*November 22, 2014*

**Biology**

How do the two ATP molecules charge the glucose molecule in glycolysis?
*November 22, 2014*

**Physics**

A water tank is filled to a depth of 10 m, and the bottom of the tank is 20 m above ground. A water-filled hose that is 2.0 cm in diameter extends from the bottom of the tank to the ground, but no water is flowing in this hose. The water pressure at ground level in the hose is...
*November 22, 2014*

**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*

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