Questions Asked on
September 7, 2012

chemistry
the diameter of a helium atom is about 1*10^2pm.suppose that we could line up helium atoms side by side in contact with one another. aproximately how maney atoms would it take to make the distance from end to end 1cm ?
asked by whitney 
Geometry
Write these definitions using the classify and differentiate method to fill in the blanks: a. An octagon is __________ that ___________. b. A concave polygon is __________ that ___________. c. A 20gon, also called an icosagon, is __________ that
asked by Astrid 
physics
In an action movie, the villain is rescued from the ocean by grabbing onto a ladder hanging from a helicopter. He is so intent on gripping the ladder that he lets go of his briefcase full of counterfeit money when he is 126.4 m above the water. If the
asked by Nathan 
math
The table shows the median home prices in Florida. What is the equation of a trend line that models a relationship between time and home prices? Use the equation to predict the median home price in 2020. Year 1940 1950 1960 1970 1980 1990 2000 Median
asked by nay 
math
The distance between city A and city B is 500 miles. On a certain wall map, this is represented by a length of 2.3 feet. On the map, how many feet would there be between city C and city D, two cities that are actually 800 miles apart? On the map, city C
asked by Kelly 
physics
Electrons move through a certain electrical circuit at an average speed of 1.7 x 102 m/s. How long (in minutes) does it take an electron to traverse a 1.8 m light bulb filament coil?
asked by Redgy22 
Programming in Python
A customer in a store is purchasing five items. Design a program in python that asks for the price of each item, and then displays the subtotal of the sale, the amount of the sales tax , and the total. Assume the sales tax is 6 percent.
asked by Mona 
chemistry
an aluminum cylinder is 10.0 cm in length and has a radius of .25 cm. if the mass of a single atom of aluminum is 4.48X10^23 calculate the number of aluminum atoms present in the cylinder. the density of aluminum is 2.70 g/cm^3 Please answer quickly.
asked by Krista 
english
The statement below represents which genre from the early american and colonial period. I want to explain origins of the natural world and its processes. the poetry of anne bradstreet the oral tradition of native americans the journals of william bradford
asked by kevin 
Maths
whats the probability of gatting a matching pair of socks if there are 8 gree and 10 blue
asked by callum 
math
how many 4 number combinations can there be from 099 without repeating a number?
asked by Hanna 
physics
The highest George can suck water up a very long straw is 2.0m What is the lowest pressure he can maintain in his mouth? Express to two sig figs
asked by george 
physics
Assume that a small sugar cube has sides 1 cm long. If you had a box containing 1 mol of cubes and lined them up side by side, how long would the line be (1 mol = 6.02 x 10^23)?
asked by Mark 
Economics
Suppose the U.S government decides that the incomes of dairy farmers should be maintained at a level that allows the traditional family dairy farm to survive. It therefore implements a price floor of $1 per pint by buying surplus milk until the market
asked by Cecilia 
world history
What were the 3 primary causes for the Roman Revolution?
asked by anonymous 
algebra
Calvin invested $7500 for one year, part 12% annual interest and the rest at 10% annual interest. His total interest for the year was $890. How much money did he invest at 12%?
asked by Briana 
CHEMISTRY
What is the wavelength in meters for light having a frequency of 2.40 X 10ˆ12 sˆ1? What portion of the electromagnetic spectrum does this belong?
asked by Kimberly 
Chemistry
A vinegar sample is found to have a density of 1.006 {\rm{ g/mL}} and to contain 4.2\% acetic acid by mass.How many grams of acetic acid are present in 1.20L of this vinegar?
asked by Roxy 
physics
A lead bullet with a mass of 0.05 kg traveling at 188 m/s strikes an armor plate and comes to a stop. If all the energy is converted to heat and absorbed by the bullet, what is the temperature change?
asked by Anonymous 
physics
Spherical particles of a protein of density 1.4 g/cm3 are shaken up in a solution of 20°C water. The solution is allowed to stand for 1.0 h. If the depth of water in the tube is 4.0 cm, find the radius of the largest particles that remain in solution at
asked by Bah 
algebra
HELP! Please Calvin invested $7500 for one year, part 12% annual interest and the rest at 10% annual interest. His total interest for the year was $890. How much money did he invest at 12%? Show work.
asked by Briana 
spanish
Write a conversation between two friends. One friend invites the other to do an activity (something from this unit) and the other friend agrees to do the activity. Then a third friend joins them and they invite that friend who has to decline because he has
asked by SATA 
physics
A racing car reaches a speed of 40 m/s. At this instant, it begins a uniform negative acceleration, using a parachute and a braking system, and comes to rest 5.0 s later. (a) Determine the acceleration of the car. (b) How far does the car travel after
asked by Tamera 
chemistry
potassium chlorate will decompose to produce potassium chloride and oxygen gas . if you begin with 45 kg of potassium chlorate, how many liters of oxygen gas measured at stp might you expect to produce from this reaction
asked by sam 
Chemistry
A lead atom has a mass of 3.4x10^9g. How many lead atoms are in a cube of lead that has a volume of 2.00cm^3 if the density of lead is 11.3g/cm^3?
asked by Hope 
heat transfer
Explain the concept of critical thickness of insulation with expression
asked by paper kro 
math
How to write the ration as a fraction in lowest terms. Compare in hours. 22 hours to 3 days. The ratio is __.
asked by Kelly 
physics
A tennis ball with a speed of 6.0 m/s is thrown perpendicularly at a wall. After striking the wall, the ball rebounds in the opposite direction with a speed of 4.0 m/s. If the ball is in contact with the wall for 0.012 s, what is the average acceleration
asked by Tamera 
college physics
A 2000kg van and a 1500 kg car both travelling at 40ms^1 in opposite directions collide head on and lock together. what are their speed and direction immediately after the collision?
asked by Mariam 
Physics
What length of #22 B&S gauge copper wire is needed to make a resistance of 500 ohms? This is what I came up with but don't think it is correct. looked up diameter for #22 gauge wire = .643 mm and converted to m 6.46 * 10^4. Used Eq. A = (pi)(d^2)/4 => A =
asked by Kevin 
Physics
When the sun is 30.4 degrees above the horizon, you measure the shadow of a tree to be 52.9 meters long. How tall is the tree?
asked by Nathan 
world geography
Where on Earth? which of the 12 northern eurasian cities will be the home of your company's newest restaurant? hint: use information from an atlas and al almanac to eliminate all but one city
asked by christina 
Physics
A woman and her dog are out for a morning run to the river, which is located 4.56 km away. The woman runs at 3.27 m/s in a straight line. The dog is unleashed and runs back and forth at 5.23 m/s between his owner and the river, until she reaches the river.
asked by Redgy22 
accounting
1. Sharon Kent is a realtor. She organized her business, called SK Realty, as a corporation on April 1, 2011. Sharon started the business by depositing $105,000 in cash into the business bank account and issued herself common stock. Consider the following
asked by Anonymous 
math
An electrician cuts a 26ft piece of wire into two pieces. One piece is 4ft longer than the other. How long are the pieces? What is the length of the shorter piece?__ft
asked by Kelly 
math
The sum of the measures of the angles of any triangle is 180 degrees. In triangle abc, angles a and b have the same measure, while the measure of angle c is 78 degrees larger than each of a and b. What are the measures of the three angles? angle a is
asked by Kelly 
math
Write the ratio as a fraction in lowest terms. compare in inches. 3ft to 31 inches. The ratio is__.
asked by Kelly 
Computers
If a floptical disk doesn't have a writeprotection notch, how is writeprotection accomplished?
asked by lilith 
physics
A certain car is capable of accelerating at a rate of + 0.80 m/s2. How long does it take for this car to go from a speed of 15 mi/h to a speed of 75 mi/h?
asked by Tamera 
Math
Two particles X and Y joined by a rigit rod of negligible mass, move along a smooth horizontal plane. Particle X has mass 7.7kg and is pushed by an external force Fx of magnitude 73.01N. Particle Y has mass 5.68kg and is pulled along the plane by an
asked by Anonymous 
college physics
in a pinball machine, a force of 24 N is used to compress a spring a distance of 0.080m. a. What is the potential energy stored in the spring? b. What is the maximum speed tha it van produve in a ball of mass 0.15kg?
asked by Mariam 
chemistry 104
if a person uses 670 kcal on a long walk, calculate the energy used for the walk in kiljoules
asked by Anonymous 
Chemistry
Suppose you have two 100 graduated cylinders. In each cylinder there is 37.0 of water. You also have two cubes: One is lead, and the other is aluminum. Each cube measures 1.2 on each side.After you carefully lower each cube into the water of its own
asked by Hailey 
chemistry
what volume of water should be added to 300ml of HNO3 0.25M to obtain HNO3 0.2M?
asked by gaby 
economics
You have been hired by a local used car dealer to help in their pricing of used cars. (Hey, it’s temporary thing, just to help you earn some extra cash.) They want to know whether the prices of the cars they sell are more influenced by the age of the car
asked by Rey 
math
A pipe is 42 inches long. It is to be cut into three pieces such that the longest is four times as long as the shortest and the middlesize piece is six inches longer than the shortest. How long is the middlesized piece?
asked by Anonymous 
algebra
If you could please help show me the steps so i can continue on with my assignment i would be very appreciative: Problem 9  p/4 = 5
asked by May 
Math
Any help would be appreciated! What is 38.896/5.1 + 509.15 to the correct number of significant figures? 516.78 What is (154+8446.1)/54 to the correct number of significant figures? 159.261 Thanks!
asked by l 
Math
Odd number between 411 and 423 with sum of 12
asked by Angel 
algebra
Could someone please check my work. what is the slope of the line that passes through the given points?(2,12( and (6,11) 1/4 (my choice) 1/4 4 4 My work: 1112/62=1/4 what is the slope of the line that passes through the given points? undefined( my
asked by brandon 
law/421
what challenges to you face in protecting your intellectual property for any state based business? then how does that change for a nationally based business? then how does that change for an international business?
asked by at 
Physics
To make a largescale representation of a hydrogen atom in its ground state, you start with a super ball (D=4.00 cm) to represent the nucleus. How far away, R, in km will you have to put the representation electron? R=____km
asked by Natalie Delgado 
physics
4. A rat named Littleguy runs in a treadmill (a wire wheel) with a diameter d =8.00 inches. In 5.00 minutes, Littleguy makes the treadmill rotate 2.80 x 10² times. If the rat were running along the ground, how far would he have run? What was his average
asked by Arthur 
physics
A soccer ball leaves the foot of a player with an intitial velocity of 22 m/s at an angle of 30 degrees above the positive xaxis. What is the initial velocity in the xdirection? Two sigfigs Remember...no units...but it would be in m/s
asked by mark 
health
While taking medications, people with HIV ________. A. Can transmit HIV infection to others through unprotected sex B. Cannot transmit HIV to others through unprotected sex C. Cannot transmit HIV to others through needle sharing D. All of the above
asked by Anonymous 
Geometry
In the triangle ABC, the measure of angle A=(5x+3)degrees, the measure of angle B=(8x2)degrees, and the measure of angle C=(5x1) degrees. Find the measure of each angle.
asked by Shelby 
math
Jose lives on the side of a mountain and the elevation of his residence is 1145 feet above sea level. His brother lives in a deep valley the is 20 feet below seal level. What is the difference in altitudes of the locations occupied by the two brothers?
asked by Anonymous 
algebra
I don't understand this question How would you explain to your friend why the quotient of x*6 and x^2 is x^6 Remember your friend is questioning the rule, so you just cannot say it is the rule.
asked by logan 
Calculus
Hello, I just wanted to verify if my work was good. Calculate the following integral by parts: ∫ upper limit is 1/5 and lower limit is 1/10. of 10sin^1 (5x)dx so first I named the variables: u = 10 sin^1 (5x) du = 50 / sqr(125x^2) dv = dx v = x so we
asked by Robert 
physics
A soccer ball leaves the foot of a player with an intitial velocity of 22 m/s at an angle of 30 degrees above the positive xaxis. What is the initial velocity in the ydirection? Two sigfigs Remember...no units...but it would be in m/s
asked by mark 
physics
A soccer ball leaves the foot of a player with an intitial velocity of 22 m/s at an angle of 30 degrees above the positive xaxis. What is the velocity of the ball at its maximum height?
asked by mark 
math
Show that ( a1/3  b1/3) ( a2/3 +a1/3 * b1/3 + b2/3 )?
asked by TUHITUHI 
physics
which natural phenomenon can describe light as a wave?
asked by Andrea 
Math/Excel
I'm not sure what two excel functions to use that will give the correct answer and how to copy the information to each cell and the values stay the same. 2. A home loan is to be repaid by a series of equal monthly payments over many years. Prepare a
asked by Angie 
DBM 381
Create a detailed ERD using the Entities and Attributes document provided with the Service Request. Create a Microsoft® Access® database using the ERD created above. You do not need to include keys and relationships at this point. Include the following:
asked by Minnie 
7th Grade Help
what is the largest cause of weathering and erosion? weathering water sand trees
asked by completeidiot 
math/Finance
Sheila Spinney borrowed $32,500 at 7.5% simple interest for 180 days on January 7. The bank later sold the note at an 8% discount on March 2. Find the proceeds to the bank. I do not know what formula to use.
asked by Janine 
Chemistry
I am doing a experiment with ice and i have to discuss the accuracy and precise of an uncertainy measure. How to express that answer.
asked by Barb 
CHEMISTRY
What is the energy of a photon with a frequency of 3.5 X 10ˆ15 sˆ1 in J/photon? In J/mol?
asked by Kimberly 
algebra
f(x)= 1/x2 Plug in 1 for x. I keep getting 1 but the book says the answer is 3. Please help. Thanks
asked by Molly 
Science conversions
How do I convert 2.3 J/proton to J/mol?
asked by Kimberly 
Theory to Practice
Which of the following is an obstacle to learning for a beginning learner? A.Knowledge of what elements of the movement to focus on B. Chronic indifference characteristic between birth and age three C. Shorter time to monitor perceptual input from the
asked by mary 
physics
To make a largescale representation of a hydrogen atom in its ground state, you start with a super ball (D=3.74 cm) to represent the nucleus. How far away, R, in km will you have to put the representation electron?
asked by arcos15 
physics
To make a largescale representation of a hydrogen atom in its ground state, you start with a super ball (D=3.74 cm) to represent the nucleus. How far away, R, in km will you have to put the representation electron?
asked by arcos15 
Physics
To make a largescale representation of a hydrogen atom in its ground state, you start with a super ball (D=3.78 cm) to represent the nucleus. How far away, R, in km will you have to put the representation electron?
asked by serin130 
Science
To make a largescale representation of a hydrogen atom in its ground state, you start with a super ball (D=3.78 cm) to represent the nucleus. How far away, R, in km will you have to put the representation electron?
asked by phylh 
Science
In a tidal barrage scheme, the area of seawater behind the barrage is 30km^2, tidal depth is 10m and the density of sea water is 1030kgm^3. a. What energy is possible available from this scheme in one cycle of ebb and flow???
asked by Mariam 
math
Laura insured her car for $12,000. When it was damaged she got $8,000 from the insurance company. What percentage of the insured amount did Laura get
asked by caqthy 
physics
A soccer ball leaves the foot of a player with an intitial velocity of 22 m/s at an angle of 30 degrees above the positive xaxis. After flying through the air, the ball lands with a velocity of m/s at an angle of degrees above the xaxis
asked by mark 
college algebra
How do you solve f(x)=square root of 2x+1 using the difference quotient? I need to see the steps.
asked by Anonymous 
Algebra....HELP!!
Solve the elimination method 7a + 6b = 3 7a +b = 25 The solution of the system is?
asked by Theresa 
math
Find the slope of the line that passes through the pair of points. (If the slope of the line is undefined, enter UNDEFINED.) (f + 6, m  6) and (f + 6, m)
asked by Honey 
earth science
What are 10 facts about hurricane Isaac?
asked by jamie 
ALGEBRA 2
What is the slope of the line that passes through the given points? (6, 2) and (7, 4)
asked by nay 
Diff Eq
If y(t)=3e^(t^2)is known to be the solution of the initial value problem y'+p(t)y=0, y(0)=y_0, what must the function p(t) and the constant y_0 be?
asked by Joe 
math
What are the step to help solve for 5r+30/20= 3r36/3
asked by Kelly 
physiology/ anatomy
I'm doing a lab about osmosis/ diffusion. We put a 2 molar solution of NaCl into a dialysis bag and submerse the bag in water, weighing the bag after 15 minute increments for an hour. I need help explaining why the weight of the bag would fluctuate (EX. 6
asked by kira 
geometry
Given letters gb and gf how do you write a mathematical to compare their measures?
asked by Brittany 
Biology
characteristics of life
asked by Anonymous 
history
I need help with six dialouge questions for jesus or abraham would anyone help me please its due monday? Example: Budda,what would you say is the most notable difference between Buddism and Hinduism?
asked by ashley 
Physical Science
find the potential energy of a 3kg block that is on a roof top 10m above the floor.
asked by Anonymous 
SCIENCE
When you drop a bowling ball & a tennis ball they hit the floor at the same time but when they hit the floor they have the same what? A. speed B. force C. momentum D. all of the above. I think it is D but I can't find anywhere what they have the same.
asked by SUE 
Spelling
What spelling pattern is in long a and long I words?
asked by Tami 
mr sus
In studying, reading, and listening, using the information you have learned in some way is important because:
asked by hk 
Math
What's the Rule Input Output 0 1 1 3 2 7 3 11 4 15 What's the rule? o 5 1 13 2 21 3 29 4 37
asked by DeWayne 
Math
Let p>q>0 with p+q = 1 and a = q/p < 1. Let X_n denote the random walk with transitions X_{n+1} = CASE 1: X_n + 1 with probability p and CASE 2: X_n  1 with probability q. For i â‰¥ 0, we set u_i = P(X_n = 0 for some n â‰¥ 0X_0 = i). Give the
asked by W 
chemistry
Can someone help me to check my answer and the way I solve this problem is right or wrong? Determine the energy required to turn a Na metal atom into a gas phase ion (Na+ (g)). Ionization energy of Na(g) 499 kJ/mol Electron affinity of O(g)for2e 603
asked by Jenny 
sceienc
how to draw use case for hospital management
asked by meme 
Math
If x = xo and x = x1 are both vector solution of Ax=b, then x1  xo is in the Null Space of A. True or False?
asked by Anonymous 
math
If planet I is 31.8 million miles from the sun than planet II, then planet III is 25.6 million miles father from the sun than planet I. When the total of the distances for these three planets from the sun is 200.2 million miles, how far away from the sun
asked by Kelly 
math
Find an equation of the vertical line that passes through (23, 6).
asked by Honey 
math
two numbers the exact answer is between 6*7381
asked by kaylene 
ACCT
ow are intangible assets handled on a typical corporate tax return? Are they "amortized" in the same manner? If it is different, why do you think it is that way?
asked by CHASE 
science
Lithium fluoride has a Ksp of 1.84 x 103. If 1.5 g are dissolved, what will be the percent ionization?
asked by anna 
Comunication Skills
You speakers of Castilian Spanish and Cantonese Chinese may be especially vulnerable to environmental influences in the mainstream classroom because of their: A. oral traditions b. linguistic environments c. cultural histor d. dialectal dominance
asked by Monique 
Algebra 2
solve the equation : 5x2(3x)=(4x) show how you got the answer!!!
asked by Shaka 
math
If 5 sweaters cost $39.40, how much would 8 sweaters cost? The cost is $__.
asked by Kelly