Questions Asked on
July 9, 2010

Physics
On a winter day the temperature drops from 5 degree C to 15 degree C overnight. If a pan sitting outside contains 0.40kg of ice, how much heat is removed from the ice for the temperature change? (specific heat (ice) = .5kcal/kg) Is it 02.0kcal?
asked by Mary 
economics
Market research has revealed the following information about the market for chocolate bars. The demand schedule can be represented by the equation QD=1,600300P, where QD is the quantity demanded and P is the price. The supply schedule can be represented
asked by chris 
Physics
The motion of a piston in an automobile engine is nearly simple harmonic. If the 1kg piston travels back and forth over a total distance of 10.0 cm, what is its maximum speed when the engine is running at 3 000 rpm? The answer is 15.7 m/s but I don't
asked by Katie 
physics
1)A toy train is initially at rest on a track fastened to a bicycle wheel, which is free to rotate. How does the wheel respond when the train moves clockwise? When the train backs up? Does the angular momentum of the wheeltrain system change during these
asked by Confused 
Physics
While running, a person dissipates about 0.6 J of mechanical energy per step per kilogram of body mass. If a 60kg person runs with a power of 70 Watts during a race, how fast is the person running? Assume a running step is 1.5 m long.
asked by Deanna 
Physics
The major difference between transverse and longitudinal waves is the (a)direction of the wave motion (b)direction of the particle placement (c)direction of the particle displacement with respect to the direction of wave motion
asked by Mary 
Physics
A large calorie (Cal) is the amount of heat needed to change the temperature of one __________ of water by one degree Celsius. Is it gram or kilogram?
asked by Mary 
Physics
When a circular hole is drilled into an aluminum sheet, does the diameter of the hole become larger or smaller when the sheet is heated?
asked by Mary 
physics
find the total momentum of electrons in a straight wire of lenght 1000m carrying a current of 70A.
asked by rana 
physics
Suppose a charge of 2.30 µC is at the origin and a charge of 2.90 µC is at the point (0, 3.00) m. (a) Find the electric potential at (4.00, 0) m, assuming the electric potential is zero at infinity. (b) Find the work necessary to bring a 4.40 µC charge
asked by alysse 
college
while a patient is having surgery,his doctor notices a small mole.The doctor doesn't think the mole is anthing to worry about,but he decides to remove it to perform a biopsy.What is the doctor guilty of?
asked by ELLA 
Physics
Wave amplitude is related to what? (a) wave velocity (b) frequency (c) energy (d) wavelength
asked by Mary 
American literature
compare and contrast the characters Natty Bumppo in the prairie and john in the hospital sketches
asked by Anonymous 
Physics
Wave velocity is inversely proportional to what?
asked by Mary 
Physics
1) A small dense object is suspended from the rear view mirror in a car by a lightweight fiber. As the car is accelerating at 1.90 m/s 2, what angle does the string make with the vertical? 2) A patient is to be given a blood transfusion. The blood is to
asked by Anonymous 
Trig
Cos(21)cos(9)sin(21)sin(9)
asked by Anonymous 
Physics
What is the wavelength in meters of radio waves produced by a radio station with a frequency of 1400 kHz? Is it 214.3 m?
asked by Mary 
economics
Beach front resorts have an inelastic supply and automobiles have an elastic supply. Suppose that a rise in population doubles the demand for both products(that is the quantity demanded at each price is twice what it was) a, what happens to the equilibrium
asked by chris 
Physics
A hydrometer consists of a spherical bulb and a cylindrical stem with a crosssectional area of 0.400 cm^2. The total volume of the bulb and stem is 13.2 cm^3. When immersed in water, the hydrometer floats with 8.00 cm of stem above the water surface. When
asked by Deanna 
Trigonometry
Cos(21)cos(9)sin(21)sin(9)
asked by Anonymous 
math
write the mixed number as an improper fraction 6 2/3
asked by ruby hall 
Grade 11th Physics
A bus starts from rest and accelerates uniformly for 20 seconds to a speed of 18 km/h. It then moves with a uniform velocity and it is finally brought to rest in 100 meteres with a constant retardation. If the total distance travelled is 0.5km. Find the
asked by Akash 
bus 303
why is it so important for employees to go through orientation
asked by mehelle 
6th grade
You have 32 coins. Some are nickels and otheres are dimes. How many coins are dimes? How many are dimes?
asked by Katelyn 
Maths
Hi, need a bit of help on this one. A straight line passes through the points (4,3) and (10,0), I need to write down the equation of the line in the form y=mx+c, I have tried but I cant seem to get the second coordinates to satisfy the equation. Here is
asked by Del 
Ethics
In basketball is it ethical to keep scoring when the differential is 100 points? Why or why not?
asked by Diva 
history
the twenty fifth amendment describes the sequence of events that would install the vice president as acting president against the will of the president. outline that sequence of events
asked by kelly 
Calc 2 college
Modeling with differential equations. If a bacteria culture doubles every 10 minutes and the original culture has 300 cells determine the rate of growth.
asked by Marianne 
music read
esque vous pouvez maide
asked by wedlidiao 
Calc 2
Differential equations. There are gophers in a very large vacant lot. The original population is 30 Gophers. After 2 months there are 38. When will there be 45 gophers? round answer to nearest tenth of a month
asked by Scott 
mathdue tonight please help
find the equation of the line 1.(2,8) and (5,6) 2.(1,1) and (2,2) 3. 6/7, (1,8) 4.9, (9,1)
asked by Michelle 
physics
1. consider a satellite with a period of 8 hours. if the radius of the satellite's orbit is doubled, what is the period for this satellite's. 2.what is the minimum amount of heat ( in joules) needed to heat 5.0kg (5 liters) of liquid water from it frezing
asked by taiwo 
mathPLEASE HELP ASAP!!(IF POSSIBLE)
Write the equation of the lines.....best answer will be chosen 1. (3,6) 7y+4y=5 2.(4,7) 7x+y=6 3.(8,8) 5x=7y+6 4.(3,8) x+9y=2
asked by Michelle 
mathPLEASE HELP
find the equation of the line using y= 6/7, (1,8) 9, (9,1)
asked by Michelle 
riddles
is any one good at riddles? here is the clue for the treasure. a pointy thing to the north and east. And a drink that will get you high beyond.An education will help you find it.But it's still no magic wand.
asked by hunter 
Calc 2
Solve the Separable equation y=((sqrt(1y^2)) x^2
asked by Scott 
Calc 2
Solve the following separable equation y'=e^2x/4y^3
asked by Scott 
Research
Define the terms “valid” and “reliable” as they relate to statistics. Can a test be reliable and not valid or vise versa? Why or why not?
asked by John 
chem 121
arrange in order of increasing vapor pressure lowest to highest Nacl, ch4 ch3ch2oh c
asked by ngugi 
Chemistry
what is the molarity of a solution prepared by dissolving 222 g of sodium carbonate in enough water to make a solution volume of 3250 mL's?
asked by Heather 
adult education
what is environmental ethics and human values?
asked by stumped 
Physics
Wave amplitude is related to what?
asked by Mary 
Physics
How much heat is necessary to change 20g of ice at 0 degree C into water at 0 degree C? (Lf = 80kcal/kg) is it 1.60kcal?
asked by Mary 
math
Solve the following system of equations x + 4y=6 x= 44y A. The solution is an ordered pair ( , ) B. No Solution
asked by christy 
Math
8x  (6x + 8) =6 The solution is x =
asked by christy 
Algebra
F) Why is (3x + 5) (x  2) + (2x  3) (x  2) not in factored form? What is the correct final factored form? What is this factoring method called?
asked by Devon 
Math
5/8x + 1/6x = 11/16 + x the solution is x= enter solution as integer or simplified fraction.
asked by Lorri 
math elimination method
elimination method really confuses me. solve by elimination method 5r 3s = 17 3r + 5s =17 A. solution is ______ (ordered pair, integer or fraction) B. Infinitely many C. No Solution
asked by Lorri 
substitution method
I am burned out on math or just confused. 3x + 7y=10 x= 22y A. Solution is an ordered pair B. No solution
asked by Lorri 
Math last one !
I have seen examples of this but the examples are not helping me solve it or set it up as a y=mx +b The equation y= 1777x + 27,153 can be used to predict the number of gun deaths in the U.S. x years after 2000, x=0 corresponds to 2000 x=3 corresponds to
asked by Lorri 
English
Which of the following is the bst example of a citation reference for a work by one author? a. Marks 1999 B. (Marks, Bill.1999) c. (Marks1999) d. Marks et.al. 1999 e. none of the above I know that C and D are wrong I think A is wrong as it has no
asked by Zack 
grammar
Part III: Revision In this section of the final, revise the sentences provided to correct the grammar errors indicated. (In many cases there will be more than one correct alternative to the sentence provided; credit will be given for all correct answers.)
asked by leigh 
trig
Hi,how do I find both solutions of the equation cos0 = 0.35 between degrees 0 and 360? Many thanks
asked by Nev 
English
Which of the following choices is not necessary information for a works cited list? A. the publisher's name B. The number of pages in the book C. date of publication Is B correct? Juct checking, Thanks!
asked by Zack 
math
Solve for t: √(t108)  √(t+186) = 66
asked by Sara 
math
Solve for t: √(t108)  √(t+186) = 66
asked by Sara 
math
Solve for t: √(t108)  √(t+186) = 66
asked by Sara 
calculus
Solve for t: √(t108)  √(t+186) = 66
asked by Sara 
calculus
A box with a square base and no top is to be made from a square piece of carboard by cutting 7 in. squares from each corner and folding up the sides. The box is to hold 16128 in3. How big a piece of cardboard is needed? ?in by ?in
asked by Sara 
math
Show that x^2+y^26x+4y+2=0 and x^2+y^2+8x+2y22=0 are orthogonal.
asked by dan 
chemistry
Food and Drug Administration (FDA) recommends that adults ingest less than 2.4 g of sodium per day. How many liters of softened water, containing a sodium concentration of 0.050% sodium by mass, have to be consumed to exceed the FDA recommendation? (Assume
asked by anthony 
math
The perimeter of a rectangular picture is 240 inches. the length is twice the width. Find the length and the width
asked by gordon 
trig
jet stream which is flowing at a rate of 80 miles per hour. It travels with the jet stream for 5 hours and then reduces its altitude, flying out of the jet stream for 4 more hours. The plane, while out of the jet stream, covered 550 miles less than it did
asked by Anonymous 
accounting
Why is cost recognized as an expense at the time of a sale?
asked by debbie 
Physics
Wavw velocity is inversely proportional to what? (a) period (b) wavelength (c) amplitude (d) All of these
asked by Mary 
calculus
A box with a square base and no top is to be made from a square piece of carboard by cutting 3 in. squares from each corner and folding up the sides. The box is to hold 7500 in3. How big a piece of cardboard is needed? ?in by ?in
asked by Sara