Questions Asked on
August 6, 2014

PHYSICS
A 15g bullet is fired horizontally into a block of wood with a mass of 2.5 k and embedded in the block. Initially the block of wood hangs vertically and the impact causes the block o swing so that its center of mass rises 15cm. find the velocity of the
asked by Anne 
Math
One model of Earth's population growth is , where t is measured in years since 1990, and P is measured in billions of people. Which of the following statements are true?
asked by Brian 
Physics
2) A child sits on a merrygoround, 1.5 meters from the center. The merrygoround is turning at a constant rate, and the child is observed to have a radial acceleration of 2.3m/s^2. How long does it take for the merrygoround to make one revolution?
asked by Anonymous 
statistics
Suppose x is a uniform random variable with c=10 and d=60. Find the probability that a randomly selected observation exceeds 30.
asked by kara 
algebra
is 3.27 a rational or irrational number
asked by samantha 
PHYSICS
a constant force of 6.00N acts on a 3.00kg object for 10.0s. what are the changes in the objects momentum and velocity?
asked by EMMA 
math corrections
I got a few questions wrong and i would like some explanations on these question: 2. A pair of pants sells for $6 more than 75% of its price of the pants? A.$12 B.$18 C.$20 D.$24 E.$36 Choice E is wrong. 4. What is the wall thickness, inches, of a tube
asked by vincent 
physics
a 1.2 kg ball drops vertically onto the floor, hitting with a speed of 25m/s. it rebounds with an initial speed of 10m/s. a) what impulse acts on the ball during the contact? b) if the ball is in contact with the floor for 0.20 s, what is the magnitude of
asked by sam 
help please!
1.after carefully constructing and double checking all of your slides, you're ready to preview your presentation. you're on the fourth slide, but you need to see the whole presentation as one unbroken flow. what button should you use to view the whole
asked by cali 
life orientation
factors that cause teenage pregnancy
asked by kgothatso 
math
A jar contains 20 marbles: 4 red, 6 white and 10 blue. If you remove 1 marble at a time, randomly, what is the minimum number that you must remove to be certain that you have at least 2 marble of each color? I guessed the answer was 18 and it was correct
asked by john 
statistical analysis
The number of vehicles passing through a pharmacy driveup line with two windows during each 15minute period was recorded. The results are shown below. Find the median number of vehicles going through the line in a fifteenminute period 16 8 24 22 30 19
asked by kdizzle 
math
Ahmed earns $1.50 for every video game he sells. When he sells one carton of 30 video game, he earns an additional $10. What is the minimum number of video games he has to sell in order to earn $450?
asked by Sharon 
physics
1. Two carts, one twice the mass of the other, experience the same force for the same time. What is their difference in momentum? What is their difference in kinetic energy?
asked by Anonymous 
CalculusMath
Complete the table without using the Quotient Rule. Function y=2x^(7/2)/x Rewrite y= Differentiate y'= Simplify y' =
asked by Lorine 
anonymous
The forms used in your coding area cost $100.00 per one thousand forms for the first 2,000 and $50 for every one thousand thereafter. If you need to order 5,000 forms, what is the total cost?
asked by Anonymous 
physics
a ball of mass 5kg is dropped from a height of 78.4m,the time taken by the ball to reach the ground is?
asked by numan 
chemistry repost
Still can't figure this one out sorry for reposting, this is the last post, if someone has time to review this question and see if they can figure out how the textbook got 1.0x10^7 seconds Iodine combines to form I2 in liquid propane solvent with a
asked by Nancy 
math
The approximate distance,S, in feet that an object falls in t seconds when dropped from a height can be found by using the formula S = 16t^2.In 8 seconds, the object will fall a. 256 feet b. 1,024 feet c. 1,084 feet d. 2,048 feet e. 15,384 feet please
asked by thomas 
Physics
A hunter holds a 3kg rifle and fires a bullet of mass 5g with a muzzle velocity of 300m/s. What is the final kinetic energy of the bullet and the riffle?
asked by Benson mb 
SCIENCE
A 1.5 kg book on top a shelf has a PE (Potential Energy) of 29.4 J. How high is the shelf?
asked by RAIZA 
Math urgent
A golf ball can travel 170 mph. This is 10/7 times the fastest speed recorded for a hockey puck. What is the record speed for a hockey puck? Make and equation and solve.
asked by Sarah 
PHYSICS
a marksman fires a bullet(mB=5.00g) horizontally with a velocity of 300.m/s from a rifle(mR=3.00kg)What is the recoil velocity of the rifle?
asked by EMMA 
statistics
If 1,000 students take a test that has a mean of 40 minutes, a standard deviation of 8 minutes, and is normally distributed, how many would you expect would finish in between 24 and 48 minutes?
asked by pablo 
Physics
1) A car moving along a straight stretch of road at 60 mph [26.7 meters/sec]. The driver makes slams on his breaks locking them so that the car skids to a stop. Assume a constant braking force due to friction, and a kinetic friction coefficient of 0.70
asked by Anonymous 
Check my answer please!
I think its decades Jill enjoys reading about American history, especially the last 40 years, or four _____________, of the nineteenth century. A. centuries B. millennia C. decades D. eras
asked by Matt 
GEN 499
My theme is underage drinking...can someone explain this to me Explain how academic knowledge impacts the social elements and institutions of both local and global communities. Assess how the principles of active citizenship could impact the contemporary
asked by Shay 
Life Science, Geography, BSTD's and Mathematics
im in GRADE10, im doing those subjects: maths, lyf science, geog and bstd's. So I need help about which job i can get for doing those subjects?
asked by Praiseworth Thobeka Ntombela 
summer math
1.Sharon drove 188.3 miles to see a softball game. If she was driving for 3 1/2 hours,what was her average rate of speed? 2.Kat worked 23 hours last week babysitting. She earned $126.50. What was her rate of pay?
asked by minecraft 
statistics
You can answer any questions from the questions on an exam. In how many different ways can you choose the questions, assuming that the order in which you choose the questions is irrelevant?
asked by randy 
PHYSICS
3) A 10.0 kg object is hanging by a massless rope in an elevator that is traveling upward. The tension in the rope is measured to be 75.0 N. What are the magnitude and direction of the acceleration of the elevator?
asked by Anonymous 
Please check this :D
Tyler wrote a paper describing life in England in the eighteenth _________, from ______ to ______. I think its A. A. century; 1801, 1900 B. decade; 1701, 1800 C. century; 1700, 1799 D. century; 1701, 1800
asked by Matt 
english
write a analogy paragraph "the process of reading a good book"
asked by fatima 
reading
may cause drowsiness alcohol may intensity this effect. use oare when operating a car or dangerous machinery.which of the following is logical conclusion based on
asked by Anonymous 
PHYSICS
when a mass of 2.5kg string is attached to a spring it stretches 42cm. a) find the constant of the spring 'k' b) how much force is required to stretch the spring 50cm? c) how much energy is stored in the spring when stretched 0.35cm?
asked by EMMA 
math
I have some problems with these questions: 3. A hat was priced at $10.80. During a sale, the hat sold for $9.18. What was the rate of discount on the hat? 4. A man's tax on his home is $1,952. The tax rate is $3.20 per $100 of assessed value of the home? I
asked by vincent 
Physics
We have a projectile launched upward with an initial horizontal velocity of 20 m/s and an initial vertical velocity of 30 m/s. 1. What is the actual initial speed of the projectile? 2. What happens to the horizontal component of the velocity as the
asked by Annika 
Interpersonal Communication
How does confidence,hard work, unorganization and shyness relate to Interpersonal Communication? I need some example from chapter 1 and 2 from Reflect and Relate 2nd Edition by Steven McCornack. Need help before the end of the day.
asked by Branden 
SCIENCE
A 1.5 kg book on top a shelf has a PE of 29.4 J. How high is the shelf?
asked by RAIZA 
Geomotrey
What is the area of a regular pentagon with a side length of 9.4 feet and an apothem length of 6.5 feet?
asked by orlando 
biology
If a microscope has a 40× objective lens in place and a 15× eyepiece lens, the magnification of the system under these conditions is
asked by oihln 
Math
Explain how knowing that that 5 divided by 8 equals = .625 helps you write the decimal for 4 5/8
asked by Anonymous 
math
A refrigerator was marked down in a price from $249.50 to $199.60 during a sale. What was the rate of discount?
asked by vincent 
Economics
. A firm has prospective sales of $50 million, fixed costs of $60 million, and variable costs of $40 million. What does the firm do (a) in the short run? (b) in the long run?
asked by Mike 
math
what is thevolume of a rectangular prism with side lengths 15.8m,24.5m and 4.2m? round to the nearest cubic meter.
asked by minecraft 
help (check)
I think its (at a beach cottage) Which words make up the prepositional phrase in this sentence? Her cousins often spend the whole summer at a beach cottage.
asked by Matt 
math
x square plus 12X plus 4 equals 0 what is the value of x
asked by eva 
PHYSICS
what work must a diesel engine in an 18,000kg truck do to increase its speed from 30.m/s to 40 m/s in 5.0s? what average force did the engine exert? what power was needed (in horsepower)
asked by EMMA 
physics
calculate the amount of work it takes to increase a cars speed from 10mph to 30 mph and from 50mph to 60mph. Is more work required for 10mph to 30mph?
asked by sam 
Geometry
Find 2 cos(x/2) sin(x/2) when x = π/6. I know that cos(x/2) = + sqrt(1cosx)/2 and sin(x/2) = + sqrt(1+cosx)/2, but how to use this identity I'm not entirely sure. Please help.
asked by Denis 
science
how to measure length accurately using meter scale?
asked by faria 
surface processes on earth
What is the most significant factor that ontros yhe development of soil.
asked by Anonymous 
Physics
Average velocity
asked by Siyabonga ngcobo 
Algebra
Find the number of decibels for the power of the sound given. Round to the nearest decibel. A rocket engine, 2.68 cross product 10−5 watts/cm2
asked by Viola 
math
3.6 + 1.9
asked by coolguy 
Psyc, statistics
Introduction to Hypothesis Testing In an article entitled “Science and ethics in conducting, analyzing, and reporting psychological research” in the journal Psychological Science (1994), psychologist Robert Rosenthal examines the relationship between a
asked by Lyndsay 
math test review
7. Given that w=7r+6r+5r+4r+3r. Which of the terms listed below may be added to w to the resulting sum will be divisible by 7 for every positive integer r? A.7r B.6r C.5r D.4r E.3r
asked by vincent 
math
A plot of land has a side length of 47ft.What is the perimeter?
asked by minecraft 
Math
John has 5 computer games. Julian has twice as many computer games as John. How many computer games do they have in all?
asked by Jessy 
math
Nia found the following prices for shorts:$25 $28 $19 $20 $18 $19 $32 $29.find th mean,median,and mode for the prices
asked by minecraft 
sci
How to prepare 1mol conc. Sol
asked by Anonymous 
sci
How to prepare 1mol conc. Sol
asked by Anonymous 
Math
1/4(8y+4)18
asked by Keya 
math
44(4x+5)< 2(x+2)+x solve
asked by Janelle 
math
A student worked V hours on Monday W hours on Tuesday X hours on Wednesday Y hours on Thursday and Z hours on Friday. What is the average (arithmetic mean)
asked by lovea 
math
please find it's factors 2x^3+5x^2+4x+1 thanks
asked by chen 
Physics
What is elastic collision
asked by Benson mb 
biology
doing a biology project and they want us to figure out how long it takes to cook 6 different foods at 5 different temperatures and gather 30 separate data points. They want us to identify an x(independent) and a y(dependent) variable that can be recorded
asked by ava 
Psychology
what motivates a person's behavior, determinism or conscious beliefs about oneself?
asked by Jossie 
math
2012 32 32 is divided by 7 then find the remainder
asked by binomial theorom 
Math
The question says When the square of a certain number is diminished by 5 times.. What does diminished by mean?
asked by Lisa 
physics
a man with a 45kg mass dove 12m from a building into 0.32m of water. a)what was his kinetic energy when he hit the water? b)what average net force was exerted on him when he stopped?
asked by sam