Questions Asked on
July 16, 2013

chemistry
the vapor pressure of water at 45.0 °c is 71.93 mmhg. Calculate the vapor pressure of a solution of 1.50 m Al(NO3)3 at this temperature (assume 100% dissociation)
asked by michael 
solubility
The Ksp of mercury II hydroxide is 3.60 x 10^26. Calculte the solubility of this compound in g/L
asked by Anonymous 
Chemistry
Complete this table of initial and final concentrations HF(aq) + KOH(aq) KF(aq) + H20(l) Initial concentrations: HF2.0M KOH1.0M KF0M Final Concentrations? how do I set this up to figure out the final concentrations? How can I tell which of the following
asked by Cat 
Consumer Math
The Smiths want to buy a 9 ft. by 12 ft. carpet and center it in a 15 ft. by 20 ft. room. What is the perimeter of the carpet?____feet
asked by DG 
SCIENCE
The size, mass, and arrangement of atoms affect the density of a substance. If a substance has a low density, what can you guess about the size, mass and arrangement of the atoms that make up that substance?
asked by Amy 
physics
A wind turbine is initially spinning at a constant angular speed. As the wind's strength gradually increases, the turbine experiences a constant angular acceleration 0.170 rad/s2. After making 2870 revolutions, its angular speed is 131 rad/s. (a) What is
asked by kyle 
physics
A man holds a 194N ball in his hand, with the forearm horizontal (see the figure). He can support the ball in this position because of the flexor muscle force , which is applied perpendicular to the forearm. The forearm weighs 24.7 N and has a center of
asked by macy 
General Chemistry
When a solution of nickel (II) chloride is mixed with a stoichiometric amount of colorless sodium hydroxide solution, a green, gelatinous precipitate forms. (a) Write the balanced molecular equation and the netionic equation for this reaction. molecular:
asked by <3 
physics
A star rotates in a circular orbit about the center of its galaxy. The radius of the orbit is 4.4 x 1020 m, and the angular speed of the star is 7.3 x 1015 rad/s. How long (in years) does it take for the star to make one revolution around the center?
asked by simon 
physics
An automatic dryer spins wet clothes at an angular speed of 4.4 rad/s. Starting from rest, the dryer reaches its operating speed with an average angular acceleration of 4.2 rad/s2. How long does it take the dryer to come up to speed?
asked by fred 
physics
The drawing shows the top view of two doors. The doors are uniform and identical. Door A rotates about an axis through its left edge, and door B rotates about an axis through its center. The same force is applied perpendicular to each door at its right
asked by john 
physics
What mass would you hang on the right side of the system in the figure to balance it  that is, to make the clockwise and counterclockwise torques equal? (Let x1 = 30 cm and x2 = 12 cm.)
asked by trineishia 
physics
At the local swimming hole, a favorite trick is to run horizontally off a cliff that is 5.95 m above the water. One diver runs off the edge of the cliff, tucks into a "ball," and rotates on the way down with an average angular speed of 2.55 rev/s. Ignore
asked by elowise 
luella high
The area of a rectangle is 15 + 5y square feet. Which of the following expressions could be the lengths of the sides of the rectangle, in feet?
asked by walter 
physics
what is the source of error occur in experiment Standing Waves (tuning fork)?
asked by kate 
physics
A 0.44kg block is hung from and stretches a spring that is attached to the ceiling. A second block is attached to the first one, and the amount that the spring stretches from its unstretched length triples. What is the mass of the second block?
asked by velet 
english
Fill in the spaces with the correct form of the verb in present continues tense. Hey! Do you want to hear about what my family (do) ________ ________(1) right now? Well, I hope you do, because I am going to tell you! Right now, my dad (work) ________
asked by leena 
physics
A hydraulic jack has an input piston with a diameter of 1.00 cm, and an output piston with a diameter of 6.00 cm. What weight (in N) can be lifted when a force of 45.8 N is applied to the input piston? Answer is 1650 N but I need someone walk me through
asked by hank 
physics
One end of a meter stick is pinned to a table, so the stick can rotate freely in a plane parallel to the tabletop. Two forces, both parallel to the tabletop, are applied to the stick in such a way that the net torque is zero. The first force has a
asked by cj 
physics
The drawing shows a uniform horizontal beam attached to a vertical wall by a frictionless hinge and supported from below at an angle θ = 38o by a brace that is attached to a pin. The beam has a weight of 346 N. Three additional forces keep the beam in
asked by aj 
Vocabulary
Denotative definitions are also known as ______ definitions. A. connotative B. direct C. indirect D. None of the Above C
asked by TammieChristina 
plane and trigonometry
a 30 foot flagstaff is fixed in the center of a circular tower 40 feet in diameter. from a point in the same horizontal plane as the foot of the tower the angles of elevation of the top of the flagstaff and the top of the tower is 30 degree repectively.
asked by rhen songalia 
physics
A helicopter has two blades (see figure), each of which has a mass of 270 kg and can be approximated as a thin rod of length 6.7 m. The blades are rotating at an angular speed of 52 rad/s. (a) What is the total moment of inertia of the two blades about the
asked by samon 
math
Mary can clean the house in 6 hours. Her younger sister Ruth can do the same job in 9 hours. In how many hours can they do the job if they work together?
asked by vincent 
physics
A 48.0 kg child is stationary in the middle of an ice rink (no friction). A 0.750 kg football is thrown with a velocity of 21.2 m/s moving eastward. The child catches the ball and together they slide off in the eastward direction with a velocity of 0.326
asked by ODU 
Trigonometry
The diameter of the wheel is 165 ft, it rotates at 1.5 revolutions per minute, and the bottom of the wheel is 9 ft above the ground. Find an equation that gives a passenger's height above the ground at any time t during the ride. Assume the passenger
asked by Anonymous 
general physics
A piece of metal, when weighed in air, has a weight of 20.7 N. When completely submerged in blood (ƒâ = 1060 kg/m3), the metal has a weight of 12.7 N. Based on the values from table 11.1 in the text, what is the most likely metal? Here is the answer but
asked by ODU 
math
Michael and Barry can complete a job in 2 hours when working together. If Michael requires 6 hours to do the job alone, how many days does Barry need to do the job alone?
asked by vinci 
statistics
Do students tend to improve their SAT mathematics (SATM) score the second time they take the test/
asked by todd 
English
1. He can not solve the math problem. 2. He cannot solve the math problem. 3. He can't solve the math problem. 4. He could not solve the math problem. 5. He couldnot solve the math problem. 6. He couldn't solve the math problem. (Are they all grammatical?
asked by rfvv 
physics
A spring lies on a horizontal table, and the left end of the spring is attached to a wall. The other end is connected to a box. The box is pulled to the right, stretching the spring. Static friction exists between the box and the table, so when the spring
asked by sammy 
Physics
A charged particle is projected into a uniform Bfield. Its velocity vector is perpendicular to the Bfield vector. What type of path will the particle travel? Neglect gravity. Answer straight line motion elliptical motion parabolic motion circular motion
asked by tom 
physics
Two people start at the same place and walk around a circular lake in opposite directions. One has an angular speed of 2.46 x 103 rad/s, while the other has an angular speed of 7.91 x 103 rad/s. How long will it be before they meet?
asked by cindy 
algebra
Factor 16x^2  25
asked by Alaska Diamond 
English
1. Last year, we had a school festival. I couldn't attend the school festival because of my illness. 2. Last year, we had a field trip. We couldn't enjoy the trip because of heavy rain. 3. Last year, we had a school talent show. We couldn't do well because
asked by rfvv 
chemistry
Calculate the volume of gasoline, in liters, that you would add to your car's tank given that the density of gasoline is 0.66 g/mL and the mass of the gasoline is 1.2 kg.
asked by kia 
physics
A Ferris wheel rotates at an angular velocity of 0.28 rad/s. Starting from rest, it reaches its operating speed with an average angular acceleration of 0.021 rad/s2. How long does it take the wheel to come up to operating speed?
asked by gregory 
stats
The following data were collected from a casecontrol study of breast cancer and fat intake: case control Highfat diet 10 5 Lowfat diet 40 55 50 60 Statistical inferences for odds ratios are based on the natural log of the odds ratio, rather than the
asked by thane 
How to start your day care facility
Of the following models of education which one is more in use than all of the other models combined? A. Cognitive B. Development Interaction C.Electic or Traditional D. Behavior Learning My answer is (A) Csomeone check my answer
asked by Brenna 
physics
A tank contains mercury, whose density is 13 600 kg/m3. Find the force exerted by the mercury on a circular plug at the bottom of the tank. The plug has a diameter of 2.54 cm, and is located 37.6 cm below the surface of the mercury. The answer is 25.4 N
asked by hank 
English
1. Turtle won the race. 2. Turtle won the race against Rabbit. 3. Turtle won the race with Rabbit. 4. Turtle beat Rabbit in/at the race. (Are they all grammatical? Would you correct any errors? And some more useful expressions? Thank you.)
asked by rfvv 
Geomtry
A farmer has 1000 meters barbed wire with which he is to fence off three sides of a rectangular field, the fourth side being bounded by a straight canal. how can the farmer enclose the largest field?
asked by AwA 
physics
A boy with a mass of 35.4 kg comes running up behind his stationary father, whose mass is 105.3 kg. If the boy’s velocity before the collision is 8.20 m/s eastward, and his father’s velocity after the collision is 3.10 m/s eastward, find the boy’s
asked by I have answer just need help with work 
physics
A pitcher throws a curveball that reaches the catcher in 0.67 s. The ball curves because it is spinning at an average angular velocity of 340 rev/min (assumed constant) on its way to the catcher's mitt. What is the angular displacement of the baseball (in
asked by gregory 
Chemistry
I'm doing some post lab questions and I'm stuck on one. In lab we performed Tollens test, Fehlings test, and Jones Oxidation to differentiate our unknown between an aldehyde or a ketone. The question I'm stuck on is " older bottles of benzaldehyde are
asked by hayley 
Finance
Assume that you are the assistant to the CFO of XYZ Company. Your task is to estimate XYZ's WACC using the following data: 1.The firm's tax rate is 40%. 2.The current price of the 12% coupon, semiannual payment, noncallable bonds with 15 years to maturity
asked by Ely 
Physics
A man stands underneath a power line carrying a current of 150 A. If the power line is 15 m above the man, what is the magnetic flux density measured by the man (Neglect the Earth's magnetic field).
asked by tom 
english
could you pl tell me the theme in edgar albert guest's equipment poem
asked by r s telagathoty 
physics
A planet orbits a star, in a year of length 4.46 x 107 s, in a nearly circular orbit of radius 3.17 x 1011 m. With respect to the star, determine (a) the angular speed of the planet, (b) the tangential speed of the planet, and (c) the magnitude and
asked by leroy 
Gen physics
A 55.0 kg high school baseball pitcher is holding a 149 g baseball as he slides horizontally on a frictionless surface with a velocity of +2.15 m/s, relative to the surface. He then throws the baseball with a velocity of +46.7 m/s relative to the surface.
asked by No clue on this one 
physics
A fan blade is rotating with a constant angular acceleration of +8.4 rad/s2. At what point on the blade, as measured from the axis of rotation, does the magnitude of the tangential acceleration equal that of the acceleration due to gravity?
asked by frank 
chemistry
the reaction is......CaCO3+2HCl>CO2+H2O+CaCl2. what mass of HCl will be neutralized by 0.50g ofCaCO3? How do i figure this out in a noncomplicated way??
asked by mimmi 
physics
A person is riding a bicycle, and its wheels have an angular velocity of 28.9 rad/s. Then, the brakes are applied and the bike is brought to a uniform stop. During braking, the angular displacement of each wheel is 13.6 revolutions. (a) How much time does
asked by phincter 
math
It takes 1 and 3/4 hours to fill a new underground gasoline storage tank. What part of the tank would be fill if the gasoline had been shut off after 1 hours?
asked by vincent 
Chemistry
Sorry to post again but I'm really stuck on this one! I'm doing some post lab questions and I'm stuck on one. In lab we performed Tollens test, Fehlings test, and Jones Oxidation to differentiate our unknown between an aldehyde or a ketone. The question
asked by hayley 
Math.....
At 1:00 a.m., a homicide detective found the reading of a corpse's body temperature to be 88 degrees Fahrenheit. One hour later, the body temperature is 83 degrees Fahrenheit. If the body has been in a 74 degree Fahrenheit room since its death, what is the
asked by Anonymous 
math
In the number 13,407.036 there are two 3s. Explain how the values of the 3s are related. Thanks
asked by sam 
Math
Find the solution set of the equation {x^2+y^2=34 {x+y=2
asked by Alexander 
math
A plane is 11.9 miles off the ground as it makes its descent to land at the Metropolitan airport (46 miles away). The pilot aims the plane downward at a 12degree angle. To the nearest mile, what distance will the plane have to travel in the air to land at
asked by Anonymous 
physics
An automobile tire has a radius of 0.335 m, and its center moves forward with a linear speed of v = 24.1 m/s. (a) Determine the angular speed of the wheel. (b) Relative to the axle, what is the tangential speed of a point located 0.243 m from the axle?
asked by katie 
Math (help steve)
Brilli the ant placed the numbers 1,2,…,n in order clockwise around a circle. She can create an infinite sequence A={aj}∞j=0 of integers by letting a0=k∈{1,2,…,n} and constructing ai+1 from ai by taking the integer that is ai positions clockwise in
asked by Danny 
social studies
I was wondering if this is right my answer has ( ) around it During Jefferson's presidency, cities were (A). mainly ports for international trade. B. mostly the haunts of thieves and degenerates. C. mainly industrial centers. D. mostly found along the
asked by carolyn 
algebra
I need help in the steps simplifying these radicals. Simplify 5√3  √98 + √48 + 6√2
asked by Alaska Diamond 
Physics
A proton is traveling horizontally at 5.4 × 106 m/s in a direction 45o north of west. A magnetic flux density has a magnitude of 0.25 T and is directed north. What is the force on the proton? Answer 1.5 × 1013 N, up 2.1 × 1013 N, down 1.5 × 1013 N,
asked by tom 
algebra
simplify √300/√6
asked by Alaska Diamond 
math
One pipe can fill a pool in 20 minutes, a second can fill the pool in 30 minutes, and a third can fill it in 10 minutes. How long would it take the three together to fill the pool?
asked by vinci 
social studies
my answer has ( ) around it With respect to the eighteenth century, the concept of the "middle ground" is helpful in A. understanding the attitudes of Indians living between the Appalachians and the Mississippi. B. explaining the attitudes and preferences
asked by carolyn 
Statistics
Are my answers here correct ? Research questions for z test, t test for independent samples and t test for dependent samples : z test: "An investigator is interested in finding out whether the particular sample of college students is similar to or
asked by Ira 
math
The area of a rectangle is 15 + 5y square feet. Which of the following expressions could be the lengths of the sides of the rectangle, in feet? A.5 and 3y B.5 and 3 + y C.5 and 5 + y D.3 and 5 + 3y
asked by walter 
math
a manufacturer markets 2 products. each unit of Product A requires 3 hours in the moulding department, 4 hours in the Paint Shop, 1 Hour in Finishing. Each unit of B requires 3 hours in moulding, 2 hours Painting, and 2 hours finishing. Each week there are
asked by kevin 
MathHooke's law
Using Hooke's Law (F=kx) determine: A) A weight of 5 pounds stretches a certain spring from its natural length of 10.2 inches to a length of 10.5 inches. Find K. B) What weight will stretch the spring in part (A) to a length of 13.2 inches? Thank you!
asked by Leah 
MATH 117
What is the greatest common factor (HINT: It may help for you to show an example of how to find a greatest common factor)? How do you know when you have found the greatest one?
asked by fRED 
Physics
Telephoto lenses allow one to "zoom in" on distant objects, making them bigger. A particular telephoto lens consists of a combination of two thin lenses having focal lengths of f1=20 cm and f2=−8 cm, respectively. The lenses are separated by a distance
asked by Danny 
psychology
You go to a party feeling a little unsure of yourself. When you get there, you feel anxious but aren't sure why. You see a good friend you didn't know would be there and your anxiety recedes. You decide everything will be okay and start to relax. The part
asked by Anonymous 
math
Brilli the ant placed the numbers 1,2,…,n in order clockwise around a circle. She can create an infinite sequence A={aj}∞j=0 of integers by letting a0=k∈{1,2,…,n} and constructing ai+1 from ai by taking the integer that is ai positions clockwise in
asked by Ron 
algebra
Can someone help my simplify √300 / √6 I believe it simplifies to 50??
asked by Alaska Diamond 
english
could u explain the rhyming scheme aa bb cc
asked by r s telagathoty 
Math
1/16x+1/4=1/2
asked by Simran 
Math
A Circular rug is 6 yards in diameter. Biding for the edge of the rug costs $2.00 per yard . What Will it cost to bind thr rug?
asked by Rondarious Bailey 
trig
Simplify: csc^2 x sec x / sec^2 x + csc^2 x
asked by tony 
math
Maryann rolls a 6sided dice six times. How many ways can she roll the dice so that the sum of her numbers is 10?
asked by Will 
Math
Find the solution set of the equation {x^2+y^2=34 {x+y=2
asked by Alexander 
algebra
factor y^2 + 18xy + 81x^2
asked by Alaska Diamond 
math
arrange the numbers 8 to 16 in the square so that the sum of each row (across, down, diagonally) will always be 36. ply help my daughters.
asked by francine hazel 
Math
How do I find the prime factorization of number 2002?
asked by Sumare 
English
1. Is the city very far from here? 2. No, it is very close. (What is the part of speech of 'far' and 'close'? Are they adverbs or adjectives?)
asked by rfvv 
math
It takes 1 and 3/4 hours to fill a new underground gasoline storage tank. What part of the tank would be fill if the gasoline had been shut off after 1 hour?
asked by vincent 
math
Matt walked 3 miles in 3/4 of an hour. At what rate of speed did he walk in miles per hour?
asked by vincent 
math
A computer train travels the distance from Acton to Boston in 1 hour and 10 minutes. If the train is traveling at an average speed of 48 miles per hour, what is the distance between the two cities?
asked by andrew 
math
Padding 7 miles upstream, Steven and his brother averaged 2 miles per hour. On the way back, their rate of speed was 3 1/2 miles per hour. How long did it take them to make the round trip?
asked by andrew 
Math Ratios
Force of attraction between two spheres is 3.75 x 10?5 dyne when the spheres are placed 18 cm apart. What is force of attraction when placed 52 cm apartÉ
asked by Lynda 
Math Ratios
Force of attraction between two spheres is 3.75 x 10^5 dyne when the spheres are placed 18 cm apart. What is force of attraction when placed 52 cm apart?
asked by Lynda 
Science
How many kilos of ammonia (N1H2)are contained in 600L of a solution that is8% NC13 by volume
asked by Carrisse 
Physics
An object accelerates from 10m/s to 16m/s in 10 secs. What will be the object’s velocity after 1 minute?
asked by Alice 
Math
If I had a company of 5000 employees and wanted to be at least 99% sure to within +/ 3% that my survey results reflected the population... how many surveys would I need to administer?
asked by Nathaniel Hilliard 
Math (algebra)
Let x,y be complex numbers satisfying x+y=a xy=b, where a and b are positive integers from 1 to 100 inclusive. What is the sum of all possible distinct values of a such that x^3+y^3 is a positive prime number?
asked by Danny 
Math
Find the solution set of the equation {x^2+y^2=34 {x+y=2
asked by Alexander 
gen physics
An iron (ƒâ = 7860 kg/m3) cube measuring 15.4 cm on a side is suspended from a wire. Find the tension in the wire when the block is completely submerged in water (ƒâ = 1000 kg/m3).
asked by hank 
gen physics
Two masses, mA = 20.00 kg and mB= 12.00 kg, are 50.00 m apart. Find the location of the center of mass of the two masses, relative to mass A.
asked by kelby 
algebra
Factor 24^2 + 42x + 15
asked by Alaska Diamond 
algebra
Simplify 5√3  √98 + √48 + 6√2
asked by Alaska Diamond 
Math
I am confused on how to do this so please help me: Evaluate: 2[(5+7)+(32)3(2+2)]
asked by Anonymous 
math
If A can do a job in 6 days that V can do in 5 1/2 days and C can do in 2 1/5 days, how long would the job take if A,B, and C were working together?
asked by vinci 
Geography
1)The study of geography includes a)living in a dessert b)growing food c)predicting the weather d)studying people e) wearing protective clothing 2) which of the following country has no seaport a) Egypt b)Algeria c)Nigeria d)South Africa e)Uganda 3)about
asked by Laura 
chemistry
how do you find moles?
asked by Anonymous 
math
Ann bought 2/3 lb of carrots 3/4lb of celery and 7/8lb of onions. How many lbs of vegetables did she buy?
asked by sam 
Physics
A train initially travelling at 30ms^1 decelerates at 4ms^2. (a) What time will it take to slow to 5m s^1? (b) What distance will it have travelled when it has slowed to 5ms^1?
asked by Alice 
Math (algebra)
What are the last three digits of the largest perfect square that can be expressed as p^2+pq+q^2, where p and q are (positive) prime numbers?
asked by Danny 
Philosophy
Identify a current event or contemporary social issue that involves ethical values.
asked by Ann 
life orientation
in 1015 lines critically discuss 5 ways in which the human or environmental problem impact on the community
asked by Elaine K 
Physics
The flux through a window whose surface is parallel to magnetic field lines is zero. Answer True False
asked by tom 
Physics
In a magnetization cycle, a large hysteresis loop indicates ____. Answer the material is nonmagnetic a large amount of energy loss due to heating the size of the material is large the material will not remain well magnetized
asked by tom 
Physics
A material that remains highly magnetized after a magnetization cycle has a large hysteresis area. Answer True False
asked by tom 
English
Is the market far away? _ No. It's very close. You can walk slowly. (In this short dialogue, what is the meaning of 'can'? Does 'can' mean 'may', which tells permission?)
asked by rfvv 
math
what is the least number of cubes that can be formed by completely cutting a large cube into smaller cubes that are identical to each other 2 4 6 8 16
asked by ? 
algebra
14x^2 29x 12
asked by Alaska Diamond 
socialology
According to Lips (2008), Plato “described women and men as having the same nature and worth and deserving the same education and legal treatment” (p. 57). These ideas of having the same nature have changed over the centuries. Most theories regarding
asked by lisa 
math
(16)^2/3
asked by tom 
math
Find the pay P Ken receives for a 49hour week if the pay x he receives for 40 hours is $180 and the pay y for each additional hour is $6.75. Use P = x + 9y.
asked by vinci 
Literature
What do you think Antigonê and A Raisin in the Sun imply about Sophocles and Lorraine Hansberry's cultural identities?
asked by Briannah 
Math
Find the solution set of the equation {x^2+y^2=34 {x+y=2
asked by Alexander 
English 3 questions
How does cost determine which financial choice you make? What would your life be like without taxes? What are your choices to finance (pay for) a major purchase like your first car? thanks
asked by Maya 
algebra
factor 216x^3 + 1
asked by Alaska Diamond 
Math (please help steve)
Brilli the ant is considering the complexities of a 5dimensional universe. She wants to count the number of integer points that are distance n√ away from the origin. Let Tn be the set of ordered 5tuples of integers (a1,a2,a3,a4,a5) such that
asked by Danny 
math
part a: Lucy makes pottery to sell. One week , she uses 6 3/4kg of clay next week 2 2/3 clay. HOW much does she use during 2 weeks ? part b : The clay is in blocks that weigh 12 kg. How much clay does lucy have left after using clay for 2 weeks ?
asked by sam 
Math (please help steve)
Brilli the ant randomly placed a token into a square on a 2×100 chessboard according to a probability distribution P. The token is then moved uniformly at random to one of the horizontally, vertically, or diagonally adjacent squares. The probability that
asked by Danny 
maths
name some rectangle numbers
asked by mia 
Math
Brilli the ant has a block of cheese that is in the shape of an equilateral triangle. She is hosting a party, and has invited her twolegged house mates. She insists that all of her guests get a piece of cheese that is in the shape of an isosceles
asked by Mark 
Life orientation
Five ways in which tithe environmental problem impacts on the community
asked by Londiwe 
Math (number theory)
For how many positive integers N is ⌊N^2/5⌋(floor of N^2/5) a prime?
asked by Danny 
English
1. Amy took a subway yesterday. 2. Amy took the subway yesterday. 3. Amy took two subways yesterday. (Which expressions are grammatical?)
asked by rfvv 
math
bob make 720 telephone calls each year. what is the average (arithmetic mean) number of calls that bob makes per month 60 70 80 100 120
asked by ? 
algebra
simplify √75
asked by Alaska Diamond 
math
Find the cost C for a 10minute phone call if the cost x for the first 3 minutes is $1.80 and the cost y for each additional minute is $0.35. Use C = x + 7y.
asked by vinci 
english
why stress is marked on e for the verb emulate
asked by r s telagathoty