At a certain time a particle had a speed of 17 m/s in the positive x direction, and 2.0 s later its speed was 32 m/s in the opposite direction. What is the magnitude of the average acceleration of the particle during this 2.0 s interval?
January 28, 2013
A person walks in the following pattern: 2.8 km north, then 2.7 km west, and finally 6.9 km south. Construct the vector diagram that represents this motion and from it judge how far and in what direction a bird would fly in a straight line from the same starting point to the ...
January 20, 2013
In 1980, the computer hard disk had a maximum capacity of 10 to the 7th power bytes. In 2000 computer hard disk capacity had increased to 10 to the 11th power bytes. By what factor had hard disk capacity increased between 1980 and 2000?
January 7, 2013
Two forces are pushing an ice shanty along the Ice. One has a magnitude of 330 lb in a direction due east. The other force has a magnitude of 110 lb in a direction 54 degrees east of north. What are the magnitude and direction of the resulant force?
January 6, 2013
calculus-can someone please help me with this ques
a- x-1 and x-5 both have odd mult. of 1 b- (1,0) and (5,0)
December 17, 2012
5 kg of some liquid at 10 Celsius is mixed with 1 kg of the same liquid at 40 Celsius. What is the final equilibrium temperature? Ignore any heat flow with the containers and/or surroundings.
December 16, 2012
I'm not sure how to deal with this problem (we're just starting the unit)... I need to find the average voltage induced into a 100 turn coil by a vertical wire when the wire's current drops from 602A to 0A in 0.01 seconds. ...if the coil was drawn as a circle on ...
December 2, 2012
At a closing at 10 a.m. on May 3, 2005, X Corp. delivers $25,000,000 to the seller of a factory using $20,000,000 from Bank One secured by a mortgage on the property, and the attorney for X Corp. records its title to the property at the same time. At 2 p.m. the same day, X ...
November 21, 2012
The Middle Way charted a course between the extremes of the worldliness of Hinduism as some practiced it, and the _________ self-discipline that left people ill in mind and body.
November 15, 2012
Rick's 76ft times 50ft house sits on a plot of land as shown in the diagram below. If 1 bag of lawn food covers 5000 ft squared , how many bags should Rick buy to cover the lawn (shaded)?
November 14, 2012
A concave mirror is constructed so that a man at a distance of 19 cm from the mirror sees his image magnified 2.0 times. What is the radius of the curvature? OK so I have tried to work this out and can't seem to find the answer. Here is what I got. Please let me know if ...
October 28, 2012
Janet jumps off a high diving platform with a horizontal velocity of 2.11 m/s and lands in the water 2.6 s later. How high is the platform? The acceleration of gravity is 9.8 m/s2 .
October 21, 2012
There were 30.7 million people living in Canada in 2000. The population was expected to have a natural growth rate of 1.1% with an additional net migration of .2 million people. A. Write a next-now equation that can be used to predict the canadian pop. for any year into the ...
October 18, 2012
A piling supporting a bridge sits so that 1/4 of the piling is in the sand, 150 feet is in the water, and 3/5 of the piling is in the air. What is the total height of the piling?
October 15, 2012
As a realtor, you earn 7% of the sale price. The owners have the house listed for $150,000 and will entertain offers within 10% of the list price. Write an equality that models the commission you could make on this sale.
October 15, 2012
Write a 1,000-word report on two different ways that you, as a young citizen, can become active in politics that would help promote causes that you believe in. You may choose a specific organization that is politically active. In the report, tell the goals of that organization...
October 15, 2012
This is the situation I have been given: You are given three capacitors, one with a capacitance of 0.025 micro-farads, another with a capacitance of 0.05 micro farads, and the third with a capacitance of 0.015 micro-farads. Using only these capacitors, arranged in series, ...
October 11, 2012
1)Let X have a normal distribution with mean 6 and standard deviation 3. a) What is the probability that X > 8.7 2)What is the probability that X<0? 3)What is the probability that |X-6| > 1.9 ? I have got so far: P(Z > 0.9) but I do not know where to go from here! ...
October 7, 2012
I forgot to input the equation. I balanced it and came up with: Al2O3(s)+6NaOH(l)+12HF(g) YIELDS 2Na3AlF6+9H20(g) Then when I converted 13.3 kg Al2O3 to moles and got an answer of 7.6662 moles After that I did the same for NaOH & HF and got: NaOH = 0.6848 moles, HF= 0.3426 ...
October 6, 2012
* If 13.3 kilograms of Al2O3(s), 58.4 kilograms of NaOH(l), and 58.4 kilograms of HF(g) react completely, how many kilograms of cryolite will be produced? * Which reactants will be in excess? *What is the total mass of the excess reactants left over after the reaction is ...
October 6, 2012
a sample of sodium-24 with an activity of 12 mCi is used to study the rate of blood flow in the circulatory system. If sodium-24 has a half-life of 15 h, what is the activity of the sodium after 2.5 days. please show work.
October 4, 2012
A jet flies from Atlanta to Dubuque a distance of 900 miles. After traveling the same amount of time on the return flight,the pilot mentioned they still had 150 miles to go. The airspeed of the plane was 300 miles per hour. How fast was the wind blowing?
September 25, 2012
I need major help with this please!!! On a safari, a team of naturalists sets out toward a research station located 6.9 km away in a direction 42° north of east. After traveling in a straight line for 2.1 km, they stop and discover that they have been traveling 22° ...
September 16, 2012
The management of a private investment club has a fund of $114,000 earmarked for investment in stocks. To arrive at an acceptable overall level of risk, the stocks that management is considering have been classified into three categories: high-risk, medium-risk, and low-risk. ...
September 10, 2012
The Russian mathmatician Pafnuti L. Chebychev pved a remarkable theorem called Chebybchev's Inequality: In any data set, if p is the fraction of the data that lies within k standard deviations to either side of the mean, then p is greater than or equal to 1-1/k^2. a. ...
September 8, 2012
Container A and B both container the same kind of liquid. Container A has a volume of 5 mL and Container B has a volume of 8 mL. Which container, if either has the highest density? Explain your Answer.
September 3, 2012
suppose a data set has n elements with n greater than or equal to 6. as you know, if n is even, then the median of the set does not have to be an element of the set. for what values of n does the first quartile not have to be an element of the set?
August 31, 2012
on a 50-point history test the median was 34 and Q1 was 28. one student got a perfect paper and qualified as an outlier under the 1.5 X IQR criterion. what is the largest value Q3 could be?
August 31, 2012
Members of the west high school band were hard at work practicing for the annual homecoming parade.First they tried marching in rows of 12 but andrew was left by himself to bring up the rear. Then the director told the band to members to march in columns of eight but andrew ...
August 22, 2012
If a truck is moving at 20m/s forward with relative to the ground, and a ball is fired 20m/s backward from the truck, what would be the velocity of the ball with respect to the ground?
August 21, 2012
Xuan saved $5340 in 3 years. If he saved $95 per month in the first year and a fixed amount per month for the next 2 years, how much did he save per month during the last 2 years?
August 19, 2012
A stock solution containing Mn2+ ions was prepared by dissolving 1.168 g pure manganese metal in nitric acid and diluting to a final volume of 1.000 L. Calculate the concentration of the stock solution.
August 9, 2012
Given that x is a normally distributed random variable with a mean of 60 and a standard deviation of 10, find the P(56 < x <74). Please show all your work and write your answer in a complete sentence. Using the information from question 1, what percentage of the ...
July 23, 2012
a wholesaler or agent who markets products for companies wanting to do business abroad is called a a. licensing agent b. marketing agent c. foreign intermediary d. wholesaling agent
July 15, 2012
Calculate the change in pH when 4.00 mL of 0.100 M HCl(aq) is added to 100.0 mL of a buffer solution that is 0.100 M in NH3(aq) and 0.100 M in NH4Cl(aq). Delta pH=? Calculate the change in pH when 4.00 mL of 0.100 M NaOH(aq) is added to the original buffer solution. Delta pH=?
July 8, 2012