Questions Asked on
July 31, 2012

physics
a 200g aluminum container has 500g of water with an initial temperature of 22 degree celsius. The following heated pieces of metal are dropped into water at the same time as follows: 300g piece of aluminum heated at 100 degree celsius; a 50g piece of
asked by Anonymous 
PreCalculus
If θ represents an angle such that sin2θ = tanθ  cos2θ, then sin θ  cosθ = A. √2 B. 0 C. 1 D. 2√2 What equation can I use to solve this problem?
asked by Peter 
Maths Directions
A person moves towards north a distance 20m from point P and reaches at Q. He turns 135 degrees in clockwise direction and goes 40√2m. From here he turns 135 degrees clockwise and goes 25m. How far is he now from his initial position? (If you could,
asked by Zorro 
math
The average middledistance runner at a local high school runs the mile in 4.5 minutes, with a standard deviation of 0.3 minute. The percentage of a runners that will run the mile in less than 4 minutes is %.
asked by rick 
design
1. Which one of the following correctly states how gussets for panties are generally made? A. With a single layer of garment fabric in one piece. B. With two layers of cotton fabric in two separate pieces.(yes) C. With two layers of garment fabric in two
asked by need to check my answers 
Early Childhood
Rosa is a newborn. As she grows, which will she learn to control last? A. Her fingers B. Her hands C. Her arms D. Her head Need help!! I put A but I'm not for sure. A preschool child can be designated a reader when he or she: A. writes a word. B. sounds
asked by Anonymous 
Chemistry
For the reaction IO3– + 5I– + 6H+ 3I2 + 3H2O the rate of disappearance of I– at a particular time and concentration is 2.8 x 103 M s1. What is the rate of appearance of I2 in molarity per second?
asked by Greg 
physics
a 200g aluminum container has 500g of water with an initial temperature of 22 degree celsius. The following heated pieces of metal are dropped into water at the same time as follows: 300g piece of aluminum heated at 100 degree celsius; a 50g piece of
asked by Anonymous 
Chemistry
To make some solution 500mL H2SO4 0.3 M. How many grams of H2SO4 are used?
asked by Natya 
Physics
A construction crew pulls up an 87.5kg load using a rope thrown over a pulley and pulled by an electric motor. They lift the load 15.1 m and it arrives with a speed of 15.6 m/s having started from rest. Assume that acceleration was not constant. a. How
asked by Anonymous 
physics
Watching Old Faithful erupt, you notice that it takes a time for water to emerge from the base of the geyser and reach its maximum height.
asked by Anonymous 
please,help, thanks
1. Which one of the following correctly states how gussets for panties are generally made? A. With a single layer of garment fabric in one piece. B. With two layers of cotton fabric in two separate pieces.(yes) C. With two layers of garment fabric in two
asked by need to check my answers 
Phy 231
A baton consists of a nearly massless rod of length L and two spheres attached to the end of the rod, whose masses are each M and whose centers are separated by L. The spheres have radius R. If the sphere radius R is not negligible compared to the length
asked by Sally 
Math
The probability that Aaron sees Hannah on any given day is 1/2. What is the probability that he sees her 3 out of all 5 days this week?
asked by Trisha 
physics
a bullet of mass 20 gram is horizontly fired with a velocity 150 mtr/sec from a pistol of mass 2 kg. what is the recoil velocity of the pistol?
asked by vedanta 
Math
Christine runs 3 miles in 25 minutes. At the same rate, how many miles would she run in 85 minutes?
asked by alexis 
design
1. What secondary personal choices work best for those with a primary cool characteristic? A. Deep, light, warm, or cool.(yes) B. Bright, light, deep, or muted C. Muted, bright, cool, or warm D. Deep, light, bright, or muted 2. Which of the following is a
asked by need to check my answers 
Macro economics
Explain the difference between the real exchange rate and the nominal exchange rate
asked by Anonymous 
chemistry
the equation n2+3h2 2nh3
asked by sai ram 
geometry
The sides and bottom of a swimming pool are to be lined with vinyl to prevent it from leaking.The pool measures 6m by 4m, and has a uniform depth of 2m. Calculate the area of vinyl that will be required.
asked by Trang 
Pure pharmacy math
How many ml of terpin hydrate elixirs containing 33mg/5ml and 5mg/5ml needed to prepare 6 fl oz of an elixir containing 4mg terpin hydrate per ml? My calculation: 33mg/5ml = x/100ml  660mg changes 0.66gm 5mg/5ml = x/100ml  100mg  0.1gm 4mg/1ml = x/100ml
asked by Fai 
chemistry
A volume of 40.0 of aqueous potassium hydroxide was titrated against a standard solution of sulfuric acid h2so4. What was the molarity of the solution if 20.02 of 1.50M h2s04 was needed? Who helps me to solve it for me.
asked by Fai 
math
From a lighthouse (270m above the ocean), an observer notices a ship. The lighthouse is setback from the ocean about 60m. To keep the ships safe from an underwater obstacle at this spot, they need to stay at least 1.4km away from shore. To see the ship,
asked by Ryan 
math
a bus charges 1.00 for each piece of luggage. if you ridethe bus at 8.50 and you have 3 suitcases, what is the total cost? solve using computations
asked by rigo 
math
the constant angular acceleration of pulley is 4rad/s2, angular speed 3 rad/s, determine the radius of pulley if the total acceleration of a print on the rim of the pulley is 3.5m/s2
asked by ajay 
math
I need a lot of help on multiplication and division.Will you help me?
asked by Amber 
physics
A 100 aluminum calorimeter contains 200g of water with an intial temperature of 15 degree celsius. if a 95g piece of copper heated to a temperatude 90 degree celsius is dropped into water, what will be the final temperature of the mixture? neglect heat
asked by Anonymous 
PHI 103
I am in crunch time and need the answers to the week 5 quiz from Ashford
asked by heeheemo 
Dynamics
A pelton wheel attains its operating speed of 800 rev/min within 2s after it is turn on. Determine the constant angular accelerations of pelton wheel. also find the total number of revolutions the wheel makes before it attains operating speed
asked by Dhilsath 
Physio help please
If trypsin and chymotrypsin become activated within the pancreas and then are released in their active forms into the bloodstream, why would this represent a potentially lifethreatening situation?
asked by L.Bianchessi 
Dynamics
The power developed by a man in riding up a 6 percent grade at a constant speed is 200 w. The man and his bicycle have a combined mass of 80 kg. Determine the speed of riding
asked by Dhilsath 
chemistry
if the pressure of 1.50L of hydrogen gas at 100 degrees celsius decreases from .500atm to .115atm,what is the final volume. assume temp remains the same
asked by chris 
math
1/xy + 3/xy  2/(x+y)
asked by Alyonka 
statistics
A researcher wants to carry out a hypothesis test involving the mean for a sample of n = 20. While the true value of the population standard deviation is unknown, the researcher is reasonably sure that the population is normally distributed. Given this
asked by Anonymous 
math
How do you solve this by elimination method? 4x+3y=016x+3=8y
asked by dee 
Dynamics
a 1500 kg automobile is travelling upto 20 degrees inclined at a speed of 6m/s. if the driver wishes to stop his car in a distance of 5m, determine the frictional force at pavement which must be supplied by rear wheels
asked by vikrant 
maths
At a certain time of the day a post, 4m tall, casts a shadow of 1.8m. What is the angle of elevation of the sun at that time?
asked by josh 
economics
for a charity show the rate of adult passes Rs.20 more than the children pass.when a company sold 50 adult and 200 children passes,the amount collected is Rs.2250.find the price of an adult pass.
asked by salam jan 
accounting
for a charity show the rate of adult passes Rs.20 more than the children pass.when a company sold 50 adult and 200 children passes,the amount collected is Rs.2250.find the price of an adult pass.
asked by salam jan 
Math
Phillips used 125, 130, 135, 140 and 145 as class centres. What class intervals did she use? Or do u need to see the graph to solve this?
asked by CrissyXD 
Law/421
Can written agreements be modified orally? Explain why or why not.
asked by anita 
human resources
melda is a careful decision maker who has a reputation for taking a long time to make decisions. She is very thorough in collecting information and evaluating more alternatives than other managers are. Imelda is probably __________ in her decisionmaking
asked by Anonymous 
math
16x18=4+5x
asked by celia 
Phy 231
an 18wheeler travels down the highway with a speed of 50 km/hr. each wheel has a 30 cm radius and a mass of 16 kg. what is the total kinetic(translational and rotational) energy of all 18 wheels?
asked by Sally 
Mathematics
an aircraft's reading shows time 8:55 at distance travelled 957km time 9:07 at distance travelled 1083 calculate distance travelled in km calculate the average speed of aircraft in km/h (that is what was asked it never said total distance it said calculate
asked by INDIANA to Reiny 
Phy 231
A CDRom starts from rest and undergoes uniform angular acceleration until it reaches 26,000 rpm in 0.25 s. Through what angle does it rotate during this time?
asked by Sally 
Science math, science, social studies
a cyclist travels a distance of 4km from P to Q & then moves a distance of 3 km at right angle to PQ . Find displacement graphically
asked by Rohan 
copy paper
how much i one ream of copy paper?
asked by Celest 
Chemistry  titration lab
Hello. For my chemistry of solutions class, we had a titration lab where we titrated NaOH into an HCl + H2O mix. This was a preparatory titration for the next one consisting of the hydrolysis of ethyl acetate into acetic acid with H+ ions as a catalyst (in
asked by Robertq 
management decision making
Analyze and compare both data sets using the data analysis and biases concepts from Chapter 11 of Sekaran & Bougie (2010). Compare only those categories that you find are significant to your analysis in demonstrating whether the US demographics based
asked by kathy 
math
a triangle has sides 9cm,12cm,18cm.the longest side of a similar triangle measures12cm.what is the length of other sides
asked by vedant 
vet tech
Which of the following sets of Library of Congress call numbers is in the correct order? A. E88 G2512 S57 1998, E88 G62 D225, E88 G62 L45, E88 G62 L166 1995 B. E88 G62 D225, E88 G62 L166 1995, E88 G62 L45, E88 G2512 S57 1998 C. E88 G62 L166 1995, E88 G62
asked by Jenni 
Theory of machine
A punching machine carries out of 5 holes per minute each hole of 30 mm diameter in 40 mm thick plate requires 10 Nm of energy/mm2 of the sheared area.The punch has a stroke of 90 mm.Find the power of the motor required if the mean speed of the fly wheel
asked by Benny antson 
Early Childhood
Studies show that early readers: A. watched educational television more than two hours a day. B. had access to a variety of reading material and watched educational television. C. knew all of the letters and sounds by age 2. D. were read fiction and
asked by Anonymous 
Dynamics
Two moving balls collide together. Determine the magnitude of their common final velocity. The first ball of mass o.5 kg and a velocity va = 3i+5j m/s. The second ball B has a mass of 1 kg and a velocity vb = 1.2ij+1.8k m/s
asked by Rajan 
Dynamics
True or false (Each question carries 1 marks) (i) A rigid body is an idealization of the behavior of a body. (ii) A Geostationary satellite follows a circular orbit at a unique and has a time period of 24h. (iii) Constancy of areal velocity for a central
asked by Rajan 
Physics
A construction crew pulls up an 87.5kg load using a rope thrown over a pulley and pulled by an electric motor. They lift the load 15.1 m and it arrives with a speed of 15.6 m/s having started from rest. Assume that acceleration was not constant. a. How
asked by Anonymous 
reading
(1) After my interview with these four young people, I reflected on the quiet sense of "difference" I sensed with many of these Upward Bound students. (2) As a college teacher who has also taught seventhgrade science, I have some experience with the faces
asked by anonymous 
Finance Accounting
Vanity Press, Inc., has annual credit sales of $1.6 million and a gross profit margin of 35 percent. a. If the firm wishes to maintain an average collection period of 50 days, what level of accounts receivable should it carry? (Assume a 365day year.) b.
asked by Johniece McCoy 
Chemistry
A buffer is prepared by transferring equal concentrations of the components of the conjugate pair, C6H5COOH and C6H5COONa, into a beaker. What is the approximate pH of the buffer? (Ka = 6.5 10–5) a) 2.81 b) 4.19 c) 7.00 d) 9.81 e) 11.19
asked by Greg 
physics
How much energy is required to melt 0.1 kg of water (hfusion = 80 cal/g, hvaporiztion = 540 cal/g) at 0oC.
asked by Carrie 
math
input 2,4 and 10 output 5,9 and 21 I do not get it at all please help me.
asked by Geo 
math
Two questions 1; what does 2n mean? 2:By accident I posted my question as an answer can you tell me a way to delete it. Please make sure that Ms.Sue answers this thank you.
asked by Geo 
math
So that technically means that 2n means x2.
asked by Geo 
World History
Lenin’s revolutionary policies included
asked by Anonymous 
math
what does answered belowed mean Damon does that mean I am right or wrong?
asked by Geo 
ENC1101
I need a thesis statement for my reflection essay in my Enc1101 class
asked by Tash 
Biology..eh:/
If trypsin and chymotrypsin become activated within the pancreas and then are released in their active forms into the bloodstream, why would this represent a potentially lifethreatening situation?
asked by Alison 
Math
a square in a circle with a radius of 2 pi .What is the perimeter of the square?
asked by Grace 
physics
A 1.20 kg mass on a horizontal spring oscillates on a frictionless surface with a displacement as a function of time given by x(t) = 0.075cos(4.16t – 2.45). (Units are standard units.) a.) Find the time for one complete vibration. b.) Find the force
asked by Lauren 
economics
If there was no item in the economy widely accepted in return for goods and services, how would transactions be made? How efficient would such a system be
asked by Anonymous 
Macro economics
If Coke sells for $1.20 Canadian and for .75 pounds in the U.K., determine what the exchange rate should be if purchasing power parity hold
asked by Anonymous 
economics
What are the two problems facing the Bank of Canada in trying to control the money supply precisely
asked by Anonymous 
math
What is 600x600?
asked by Anonymous 
economics
If the chartered banks decide to maintain an average reserve ratio of zero, what would be the size of money multiplier
asked by Anonymous 
Macro economics
Paper currency is the most easily recognized form of money. How well does paper currency serve the functions of money if we have an inflation rate of 50percent per year? b) Gold is also recognized as a form of money. How well does gold serve the functions
asked by Anonymous 
economics
It is often suggested that the Bank of Canada try to reduce the inflation rate to zero. If we assume that velocity is constant, does this zeroinflation goal require that the rate of money growth equal zero? If yes, explain why. If no, explain what the
asked by Anonymous 
Macro economics
How would a fall in U.S. interest rates affect Canadian investment, saving, net foreign investment, and the Canadian real exchange rate
asked by Anonymous 
english literature
In young goodman brown what is the conflict, effect (emotional impact of story on reader), end orientation, exposition, rising action, climax, falling action, conclusion, dramatic irony? I know the conflict is good vs evil and human nature to do evil; the
asked by melissa cohen 
Math
If Jack's house is 7.1 miles due north of the Senior Citizen Center and Belinda's house is 6.3 miles due west of it, then to the nearest tenth,what is the shortest distance between their houses?
asked by Grace 
Physics
How much heat is required to raise the temperature of a 4.3kg block of steel by 48 K? (The specific heat of this steel is 450 J/kg · K.)
asked by Sierra 
Physics
Your swimming pool is square and 4.9 m on a side. It is 3.9 m deep in the morning. If the temperature changes by 44°C during the afternoon, how much does the depth of the water increase?
asked by Sierra 
Physics
An ice cube of volume 17.7 cm3 is initially at a temperature of 19.3°C. How much heat is required to convert this ice cube into steam?
asked by Sierra 
Physics
You drop 378 g of solid ice at −35°C into a bucket of water (1,200 g) at 45°C. Eventually, the ice all melts, and the entire system comes into thermal equilibrium. Find the final temperature of the system.
asked by Sierra 
Math
To the nearest tenth,what is the circumference of a circle with an area of 49pi?
asked by Grace 
Physics
If you combine 34 kg of ice at 0°C with 80 kg of steam at 100°C, what is the final temperature of the system? °C
asked by Sierra 
Physics
A rectangular aluminum plate has an area of 0.41 m2 at 23°C. If it is heated until its area has increased by 4.4 106 m2, what is the final temperature of the plate? °C
asked by Sierra 
Math
If a line L with a slope of 2/5 passes through the points (5,0) and (x,2) then what is the value of x?
asked by Grace 
Physics
Use the exact values you enter in previous answer(s) to make later calculation(s). Energyefficient windows are constructed with two panes of glass separated by an air gap (see figure below). In a typical window of this type, the air gap makes a huge
asked by Sierra 
Physics
The intensity of sunlight at the the top of the Earth's atmosphere is about 1350 W/m2. (The intensity at the surface of the Earth is somewhat smaller due to absorption and reflection by the atmosphere.) What is the total power emitted by the Sun?
asked by Sierra 
Math
The radius of the small circle A is onehalf the radius of the large circle B.WHat is the ratio of the area of the small circle to the area of the large circle?
asked by Grace 
Physics
A snake is sunning itself on a rock. (a) If the snake is 0.5 m long, what is the approximate amount of radiation it absorbs from the Sun in 11 min? (Assume the snake has a cylindrical shape and ignore both ends, a radius of 0.03 m, and a mass of 2.1 kg.
asked by Sierra 
Circle question
In a circle with radius 20cm, a chord is drawn with length 12 cm. Find the area of the two regions created. Find the perimeter of the two regions created.
asked by Jennfier 
Math
If I have cards numbered 1 through 40 and I randomly draw 3 then replace them, shuffle them and draw three again what are the odds of drawing one of the numbers more than once
asked by Kyle 
Math
DIRECTIONS:Rewrite without using absolute the absolute value symbol. a. (5)36
asked by alex 
Math
Which one is a better deal? 48 sheets of origami for $2.75 or 55 sheets of origami paper for $3.10
asked by Brynn 
physics constant angular acceleration
A wheel with radius 25.2 cm rotates with constant angular acceleration 3.75 rad/s2 (radians per second per second). If at t = 0 s, the angular speed of the wheel is 4.3 rad/s, how long does it take the wheel to complete 4 revolutions?
asked by Mike 
geometery
how long does a piece of wire need to measure to get 18" diameter?
asked by Rita 
Math
If xΩy is defined as the smallest integer of which both x and y are factors, then 10Ω32 is how much greater than 6Ω20?
asked by John 
Chemistry
Calculate the mole fraction of glucose (C6H12O6) in a solution which contains 15g of glucose in 100 g of H2O.
asked by Greg 
Dynamics
State the principle of impulse and momentum. And clearly difference between impulse and impact
asked by Rajan 
Algebra
Z12 / 3=4
asked by Krissy 
physics
a rectangular pool has a volume of 375 m.The pool is 10 m long and 5m wide, how deep is the pool
asked by Anonymous 
Trigonometry
A hill in Colorado makes an angle of 15.0° with the horizontal and has a building at the top. At a point 75.0 feet down the hill from the base of the building, the angle of elevation to the top of the building is 55.0°. What is the height of the
asked by Cyndy