Questions Asked on
March 14, 2014

Calculus
Find four other forms of the point (4, 105°) Two of the four must include a negative r value.
asked by Alexis 
pragati
in the given figure ABCD is a trapezium in which AD parallel to BC. Angle ABC= 90degree. AD=16cm, AC=41cm and BC=40cm.find the area of the trapezium.
asked by harsh 
Physics
A 295kg box is pulled at a constant speed by the little engine. The box moves a distance of 2.8 m across the horizontal surface. (μ=.20) How much energy is transferred by the engine? (How much WORK is done?)
asked by Anonymous 
p
Stan the strongman lifts a 524 kg dumbbell from the floor to 1.69 meters above the floor at a constant velocity. How much energy does it take Stan to lift the dumbbell?
asked by Anonymous 
math
Three boys are sharing a cake. Joey ate 2/5 of the cake, Billy ate 1/3 of it, and Matt ate the remaining piece. What is the ratio of Joey's piece to Billy's piece to Matt's piece?
asked by Dana 
Writing Skills Writing Assignment
I am trying to complete a 750 to 1000 word essay but I completely have no clue what to write about and my writing skills is a bit lacking. It needs to be about a personal experience. I have more info if needed.This is the final paper result. Your final
asked by Jen 
Algebra
At a concession stand three hot and 4 hamburgers cost 13.50; 4 hot dogs and 3 numbers cost 12.75. Find the cost one hot dog and the cost of one hamburger
asked by Shauna 
Algebra
1) If N is the set of natural numbers that are factors of 18, represent this set in roster form. 2) Suppose U={1,2,3,4,5,6,7,8,9,10} is the universal set and A={1,4,5,9,10} What is A? 3) The wrestling team is holding a car wash. The teams goal is to raise
asked by Math Help? Please 
Math
For what value of a, would the system have an infinite number of solutions? 2xy=5 8x47=2a A) 2 B) 4 C)5 D)10 E)20
asked by HELP PLEASE 
Chemistry
How many grams of I2 are present in a solution if 39.85mL of 0.160M Na2S2O3 solution is needed to titrate the I2 Solution
asked by Jackie 
physics
Croquet ball A moving at 8.0m/s makes a head on collision with ball B of equal mass and initially at rest. Immediately after the collision ball B moves forward at 7.1m/s . What fraction of the initial kinetic energy is lost in the collision?
asked by Ina 
statistics
Which two scales of measurement always require nonparametric procedures and why?
asked by Anonymous 
math
Compute Mike's estimated tax payment for the fourth quarter. He is selfemployed and he expects to earn $20,640 this year. His estimated income tax rate is 18%. For selfemployed persons, social security tax is 12.4% of wages up to $106,800, and Medicare
asked by Anonymous 
math
How much combined tax should be withheld from the paycheck of a single employee earning $3,185 per month and claiming zero withholding allowances?
asked by Anonymous 
math
Thomas Rendell's company pays him a straight 6% commission with a $1,350 drawing account each month. If his sales last month totaled $152,480, how much commission is owed to Thomas?
asked by Anonymous 
math
Solve the following problem using 6.2%, up to $106,800, for social security tax and 1.45%, no wage limit, for Medicare tax. Kristy Dunaway has biweekly gross earnings of $1,750. What are her total social security and Medicare tax withholdings for a whole
asked by Anonymous 
math
Jerry King is a server in a restaurant that pays a salary of $22 per day. He also averages tips of 18% of his total gross food orders. Last week he worked 6 days and had total food orders of $2,766.50. What was his total gross pay for the week?
asked by Anonymous 
math
Solve for the base, rounding answer to hundredths if necessary: 76 is .2% of ______.
asked by Anonymous 
math
Ace Formalwear buys tuxedos from a supplier and has an invoice amount of $27,700. The terms of the sale are 3/20, n/30. If Ace sends a partial payment of $7,400 on the discount date, what is the net amount still due?
asked by Anonymous 
math
On August 18, Sullivan Company received an invoice in the amount of $6,700, having terms of sale of 4/15 EOM. What is the discount date?
asked by Anonymous 
Physic A Level
A lift cable which is 50m long ,is made from high tensile steel of Young Modulus 2.0x 10^11 Pa. the cable is made from 100 wires each of radius 2.0mm . Calculate the extra extension in the cable when 10 passengers pile into the lift ,the total mass of the
asked by Laila 
physics
An object is thrown upward from the edge of a tall building with a velocity of 10 m/s. Where will the object be 3 s after it is thrown? Take g=10ms−2
asked by A 
physics
What is the gravitational field strength at a height h above the surface of the Earth? R is the radius of the earth gR2(R+h)2 gR(R+h) g(R−h)R g(R−h)2R2 2 The instrument used for experimental determination of the value of the universal gravitational
asked by A 
physics
A child in a boat throws a 5.15kg package out horizontally with a speed of 10.0 m/s. The mass of the child is 24.2kg and the mass of the boat is 33.2kg . Calculate the velocity of the boat immediately after, assuming it was initially at rest.
asked by Edward 
Math
A firm is evaluating two machines. The first costs $250,000 and will require annual maintenance of $30,000 per year for 10 years. At the end of 10 years, the salvage value will be $75,000. The second machine costs $400,000 and will require $225,000 at the
asked by MathHelp 
Physics
A freight train has a mass of 4.78 * 10^7 kg. the locomotive provides a force of 1.3 * 10^6 N and the brakes provide a force of 3.2 * 10^3 N. 1. How long will it take for the train to accelerate to it's maximum speed of 15 m/s? 2. The train accidentally
asked by Michelle 
Physics
A traffic light is hanging from two cables tilted at 37 and 42 degrees. If it has a mass of 2.3 kg find the tension in each cable.
asked by Michelle 
English
I need to make this into two paragraphs and make it a little longer. I am drawing a blank. Can someone please help me. My study habits consist of reading aloud, note taking and last minute cramming. The reading aloud and note taking have always worked well
asked by Michelle 
math
Jungle Jim owes three debts: $500 due in one year plus interest at 6% compounded semiannually, $2000 due in two years, $1000 due in three years plus interest at 5% compounded monthly. He wishes to discharge these debts by paying $500 now and two equal but
asked by MathHelp 
quantitative techniques
solve this using gaussian elimination x+5y=7 x7y=5
asked by shumirai 
chemistry
A radioactive sample contains 2.45 g of an isotope with a halflife of 3.8 days. How much of the isotope in grams will remain after 11.4 days?
asked by Jacques 
Physics
A rope is wound round a fixed cylinder of radius r so as to make n complete turns . Show that if one end of the rope is held by a force f, a force f e^2(pi)nu must be applied to the other end to produce slipping,where u is the coeff. of friction between
asked by Ayat 
Physics
A stream of water flows through a small hole at depth h = 10 cm in a tank holding water to height H =40 cm. At what distance x (in cm) does the stream strike the floor? (Neglect air resistance).
asked by yana 
science
What happened to the proportions of the two phenotypes as the F1 generation grew from 10 to 100 offspring? Why?
asked by biology123 
science
If Mendel had only looked at a single cross that produced 10 offspring to determine the pattern of inheritance of seed shape in pea plants, what might he have inferred?
asked by cell123 
science
How can two parents with only one round allele between them (1 out of 4 alleles) produce an F1 generation in which 50% of individuals have round seeds? What appears to be the inheritance pattern for seed shape?
asked by parent123 
please check(Social studies)
1.A 2.A 3.B 4.D 5.C 1. Which circumstance had the most direct impact on european colonization of caribbean south america A. The slave trade in africa B. the fur trade in europe C. piracy in the caribbean sea D. rumors of gold in EL Dorado 2. How did global
asked by bonn 
Physics
Stan the strongman lifts a 524 kg dumbbell from the floor to 1.69 meters above the floor at a constant velocity. How much energy does it take Stan to lift the dumbbell?
asked by please help 
physicsimpulse
A tennis ball of mass m = 0.068kg and speed v = 21m/s strikes a wall at a 45∘ angle and rebounds with the same speed at 45 What is the magnitude of the impulse given to the ball?
asked by Edward 
Physics
A 28 kg ball initially at rest rolls down a 159 m hill. When the ball reaches the bottom it is traveling at 31.3 m/s. How much energy is dissipated by friction on the ball?
asked by Anonymous 
physics
A 15.7 kg block is at rest on a ramp, whose angle is 12.1 degrees from the horizontal. How much Normal Force is acting on the block?
asked by Anonymous 
math
select the values of ^xthat are the solutions to inequality 0>x^2+5x2
asked by EMILYS MOM 
math
slove for ^x in the equation X^2 3x18=0
asked by EMILYS MOM 
math
select the approximate values of x that are solutions to f(x)=0, f(x)=8x^2+2x+4
asked by WINSTON 
math
select the approximate values of x that are solutions to f(x)=0 where f(x)5x^2+8+5
asked by WINSTON 
chemistry
Calculate the molarity if a Ba(OH)2 solution if a 37.25ml portion of this solution is neutralized by 45.00mL of 1.500M HCl. You will need the balanced reaction
asked by Anonymous 
Mathematics
Old MacDonald has to pack 60 chickens into 32 cages. If each cage can hold at most 3 chickens, what is the minimum number of cages that will have at least 2 chickens?
asked by Hari 
Economics
The South African government is not providing enough welfare of subsidies to the poor and underpriviledged. What are welfare payments or consumer subsidies? What is the South African govornment providing and to whom? What are the costs and consequences
asked by Sphesihle Mthethwa 
chemistry
In standardizing a potassium hydroxide solution, a student finds that 32.60mL of the base solution is needed to titrate 0.5045 grams of KHP to a phenolphthalein end point. In another titration, 26.63mL of this same base solution is needed to titrate
asked by Anonymous 
algebra
Graph the set of data {(1,7),(2,1),(3,13),(4,3),(0,5)} Answers are Y=0,9x+8.6 Y=2/5x=2 Y 5/2x+5 Y=5 Thanks
asked by snow 
social studies(updated answers)
2.C 3.D 4.A 2. How did global trade most contribute to the colonization of south america? A. competition over shipping lanes B. need for raw materials to make goods C. desire for new trading partners D. resistance to government control of commerce 3. what
asked by bonn 
Grade 10 English
We need to read the story The Stone Carvers I need help with finding important quote s in chapter 1 to 2
asked by Anonymous 
I need help (Physics)
A 28 kg ball initially at rest rolls down a 159 m hill. When the ball reaches the bottom it is traveling at 31.3 m/s. How much energy is dissipated by friction on the ball?
asked by Help please 
History 12
What does lenin have to do with Tsarism, World War 1, March revolution and the provisional government, November Revolution, the civil war, War Communism, national Economic Policy, Trotsky, Stalin, and the Comintern?
asked by Crystal 
Math
The data in the table are linear. Use the table to find the slope. x 2 4 6 8 y 1 2 5 8 A. 3/2 B. 3/2 C. 2/3 D. 2/3
asked by Anonymous 
physics
A chemist is working with a 4.50 mol sample of an ideal gas. The internal energy of the sample is known to be 14,900 J. What is the average kinetic energy of each gas molecule?
asked by Anonymous 
human bio please help
Skeletal muscles contract when their (A)__________ shorten, using the energy source ATP. A rise in the concentration of (B)__________ ions causes muscle contraction.
asked by Ann 
Physics
A 2 kg brick falls at 5.1 m/s from a height of 6 m above a spring that has a spring constant of 47 N/m. The brick strikes and compresses the spring until it stops moving. Ignore friction effects. How much is the spring compressed by the brick? Assume that
asked by Anonymous 
chemistry
Five liters of air at 50.0°C are warmed to 100.0°C. What is the new volume if the pressure remains constant?
asked by Anonymous 
Physics
A 2 kg brick falls at 5.1 m/s from a height of 6 m above a spring that has a spring constant of 47 N/m. The brick strikes and compresses the spring until it stops moving. Ignore friction effects. How much is the spring compressed by the brick? Assume that
asked by Anonymous1 
Algebra
1) There are two pet stores in zacharys town. There are dogs, cats, and hamsters at the first pet store. The second store has dogs, rabbits, and fish. Write a set that represents all of the different pets stores in the town. 2) of the 125 students in an
asked by Math Help? Please 
Algebra
1) If N is the set of natural numbers that are factors of 18, represent this set in roster form. 2) Suppose U={1,2,3,4,5,6,7,8,9,10} is the universal set and A={1,4,5,9,10} What is A? 3) The wrestling team is holding a car wash. The teams goal is to raise
asked by Math Help? Please 
phys
A 1000kg airplane moves in straight flight at constant speed. The force of air friction is 1800 N. The net force on the plane is
asked by q. 
Biology
What is the basic unit of information in a DNA molecule? In an RNA molecule? In a polypeptide?
asked by Anonymous 
personal finance
Chloe has a $2,500 credit limit on her credit card and has charged $1,295.19 to her account. There is a 1.5% finance charge on the $1,295.19. How much must Chloe pay to clear her account?
asked by maria 
Physics
A car starts from rest and moves with uniform acceleration of 0.3 meter per second. After 30 second, find the velocity of the car and distance covered?
asked by M.Tariq 
Chemistry
A student has 600.0 mL of a 0.30M solution of HNO3. How much water must she add in order to make it a 0.15 M solution? Be careful how this question is answered.
asked by Katie 
social studies(updated answers)
2.B 3.C 2. How did global trade most contribute to the colonization of south america? A. competition over shipping lanes B. need for raw materials to make goods C. desire for new trading partners D. resistance to government control of commerce 3. what
asked by bonn 
algebra
A 5mile cab ride costs$7.20 a 9 mile cab ride costs $11.60 find a linear equation that models a relationship between cost c and distance d? Answers are C =1.44 d +4.40 C=1.10 c +4.40 C=1.29 d+1.70 C=1.10 d +1.70 Thanks
asked by snow 
Social studies
Four major candidates ran in the 1824 election, all under the "DemocraticRepublican" name. One of the candidates, Andrew Jackson, was already famous. In the 1780s, he earned the right to practice law and served in various offices of the state government,
asked by Jessie 
English
The burning of trees adds carbon dioxide to the air OR the burning of trees add carbon dioxide to the air?
asked by Anonymous 
Physics
A skater with an initial speed of 5.90 m/s stops propelling himself and begins to coast across the ice, eventually coming to rest. Air resistance is negligible. (a) The coefficient of kinetic friction between the ice and the skate blades is 0.125. Find the
asked by Elle 
Precalculus
1. Here is the frequency table for this distribution (the frequency histogram is not shown): Since I cannot make a table on this forum,the format will be like this: Time(minutes)and Number of telephone calls. 0
asked by Anonymous 
Chemistry
how many grams of bromine will be present in a sample that molar mass of 70.0 g/mol and occupies a 2.00L container at 117 kPa and 35.1C
asked by Bernardo 
Chemistry
Uranium 235 problem that exits
asked by HIna 
AP Biology
The onepod condition (P) is dominant to the three pod condition (p). Normal leaf (L) is dominant to wrinkled leaf(l). Determine the genotypes for the two parents for all possible matings producing the following: 150 one pod normal, 147 one pod wrinkled,
asked by Luis 
history
"Such is the Old Town of Manchester, and on rereading my description, I am forced to admit that instead of being exaggerated, it is far from black enough to convey a true impression of the filth, ruin, and uninhabitableness, the defiance of all
asked by maya 
Chemistry
How much water can be produced from the complete reaction of 3.64 L of oxygen gas, at STP, with hydrogen gas? Answer in units of g
asked by Linda 
urgent (physics)
A 2 kg brick falls at 5.1 m/s from a height of 6 m above a spring that has a spring constant of 47 N/m. The brick strikes and compresses the spring until it stops moving. Ignore friction effects. How much is the spring compressed by the brick? Assume that
asked by help 
Probability
Question #1 50 students total. 12 students travelled by car only 7 students travelled by bus only 5 students travelled by car and walked,but did not use a bus 10 students travelled by bus and walked,but did not use a car 3 students used all three forms of
asked by Anonymous 
Absorption spectra of pigments
On the graph light absorption in % vs wavelength, how come the color of chlorophyll is green? Since this is an absorption spectra, isn't it supposed to absorb blue and red and not green? Rather, it reflects green??? How would the graph be different if it
asked by Anonymous 
Chem
The density of ethanoic anhydride is 1.092 g/mL. Use this value, and the amount that you used in the laboratory to show that ethanoic anhydride is in excess for your preparation of ASA?, 2.5ml of ethanoic anhydride was used.
asked by Dan 
Chemistry
Determine the rate constant for the following secondorder reaction: A=C+2D given that the initial concentration of A is .3 M and that the concentration of C increase to .01 M in 200 seconds. Express the result in terms of the rate law for the loss of A.
asked by Anonymous 
Physics
Assume a spring has an unstretched length Xo. Write an expression for the elastic potential energy of the spring in terms of the position of the end of the spring X and its spring constant K.
asked by Tim 
Chemistry
In a bomb calorimeter, a 6.50 g sample of octane (C8H18) is combusted. The combustion enthalpy for octane is 5.45 MJ per mol C8H18. The temperature change of the calorimeter is 16.5 oC. What is the heat capacity of the calorimeter?
asked by Mary 
Chemistry
When the rate of the reaction 2NO+O2=2NO2 was studied, the rate was found to double when the O2 concentration alone was doubled but to quadruple when the NO concentration alone was doubled. Which of the following mechanisms accounts for these observations?
asked by Anonymous 
algebra
Your research the average cost of whole milk for several years to look trends the table show your data what is the equation for a line that best fits how much would you expect to pay for a gallon of milk in the year 2023? Year 1998, 2000, 2002, 2004,
asked by snow 
Physics
The acceleration of a particle moving only on a horizontal xy plane is given by a=5ti+6tj, where a is in meters per secondsquared and t is in seconds. At t=0, the position vector r=(19.0m)i+(39.0m)j locates the particle, which then has the velocity vector
asked by Stacey 
English 3
When Thomas Paine writes about reconciliation he is referring to
asked by Anonymous 
Physics
A particle leaves the origin with an initial velocity v=(3.68i) m/s and a constant acceleration a=(3.33i3.72j)m/s^2. When the particle reaches its maximum x coordinate, what are (a) its velocity, (b) its position vector?
asked by Stacey 
Calculus Help and Check
Find dy/dx by implicit differentiation. x^5(x + y) = y^2(9x − y) this is what i've got so far but I don't think it is the right answer. y'= 9y^26x^55x^3y/x^5+9y^218xy
asked by Tanya 
Business
What does stagnant and inflation means
asked by Darius 
Phi
The social contract approach to political theory
asked by Dale 
English proposal
I am going to post my proposal here so can someone please edit it? When I post it can you quickly copy and paste into a document and delete my post from here so it won't be public?
asked by Mohammad 
Business
Stagflation refers to an economy that is what, but which has what?
asked by Darius 
Business
Economists have created terms to describe what? What is called depression? The largest depression in the twentieth century was the what? and how long did it last? In 1933 being the worst year how many workers were out of work?
asked by Darius 
algebra
Want to learn how to do a scatter plot it is about home in Texas average temperature from January to August and electricity bills from January to August Thanks
asked by snow 
statistic
You draw one card from a shuffled standard deck or cards (cards are in four suitsred diamonds, red heart, black clubs and black spadesand are numbered 2,3,4,5,6,7,8,9,10, J,O,K,A). A.What is the probability of drawing a red card B.What is the probability
asked by Helen 
Statistic
In a survey of students at a local high school, 30% of the students said they liked tater tots and 15% of the students said they like French fries. If every one of the students who said they like French fries also said they like tater tots, what proportion
asked by Helen 
math
A G.P has 6 terms. If the 3rd and 4th term are 28 and 56 respectively find common ratio, first term and the sum of the G.P.
asked by princewill favour 
Math
In the Math Virtually Everywhere project you completed for this module, you learned all about cell phone plans. The best cell phone plan for a customer can vary based on how much they plan to talk. The plan that is the best deal for one customer may not be
asked by Nick 
Happy Pi Day
http://www.cnn.com/2014/03/14/tech/innovation/pidaymathcelebrations/
asked by Ms. Sue 
Science on dissolving
Some medicines are more effective if they dissolve slowly. How could you design a pill that would take longer to dissolve?
asked by Harmony Ann 
chem
at a certain temperature, .700 mol of SO3 is place in a 4.50L container. 2SO3(g)2SO2(g)+O2(g) At equilibrium, .140 mol of O2 is present. Calculate Kc
asked by Jill 
Chemistry
Calculate the mass of 1.00 mol of each of these substances: a.) silicon dioxide (SiO2) b.) diatomic nitrogen (N2) c.) iron () hydroxide (Fe(OH)3) d.) copper (Cu)
asked by Kelsi 
French Pronunciation
Is été pronounced like ehti or like ehtay?
asked by Anonymous 
Calculus
Find equations of both the tangent lines to the ellipse x^2 + 4y^2 = 36 that pass through the point (12, 3). smaller slope y= larger slope y=
asked by Tim 
math
i put 4000.00 in savings. at end of 3 years the account earned 960.00 in simple interest at what simple interest rate did the account grow? please show me the work.
asked by mark 
Math
Each of the following is equivalent to 75% of 60 EXCEPT A. 0.75 × 60 B. 0.6 × 75 C. 60 × 15 20 D. 75 × 6 100 E. 60 × 3 4
asked by jacob 
Math, Please Help!
Ned divided a given number by 3 and then added 2. If he should have multiplied the number by 3 and then subtracted 2, which of the following two steps can he do next to get the correct answer? Subtract 4 and then multiply by 9. Subtract 12 and then
asked by Toni 
Chemistry, please help!!!
I have to go to work this weekend so I'm trying to get my homework finished. Could you please help me figure out this question? Calculate the mass of 1.00 mol of each of these substances: a.) silicon dioxide (SiO2) b.) diatomic nitrogen (N2) c.) iron ()
asked by Kelsi 
French Pronunciation
Are danse, danses, and dansent pronounced the same way?
asked by Anonymous 
technology
Need help on the question below. I have read all about all 3 laws but still don't understand if this would be 1st or 2nd law. "A ball is rolling in a straight line on a hardwood floor. A cat hits it from the right, so the ball rolls left. Which Law of
asked by Brandi 
Probability
Question #1 50 students total. 12 students travelled by car only 7 students travelled by bus only 5 students travelled by car and walked,but did not use a bus 10 students travelled by bus and walked,but did not use a car 3 students used all three forms of
asked by Anonymous 
Physics
A mountain climber dangles his water bottle and feels the bottle makes an angle of 25 degrees with respect to the vertical line. If his acceleration takes 18 seconds, calculate the speed of the climber.
asked by Bert 
exceptionall children
transactional relationship exist in families because .my answer is b. children and adults influence each others behavior
asked by sabrina 
THIS IS FOR MATH AND SCIENCE TUTORS
HAPPY PI DAY! A mathematician, a physicist, and an engineer are all given identicalrubber balls and told to find the volume. They are given anything theywant to measure it, and have all the time they need. The mathematician pulls out a measuring tape and
asked by Anonymous 
Physics
Two cars are parked on a street. A third car hits the back of the second car and causes all of the cars to move. (Ignore the distance between the cars). Calculate: (a)The acceleration of the whole system; (b)the net force on each car; (c)the contact force
asked by Bert 
English
What is the difference between "brightest people" and "brightest of people?"
asked by Anonymous 
chemistry 101
How many grams of bromine are in 1.57 grams of phosphorus tribromide?
asked by steve 
College History
How do I find the answer to the question below? Salonica is today a provincial city in a small country. For centuries it was the second city of a major empire. Little or nothing is now left of that heritage. What is it about the past of this city, however,
asked by Amy 
algebra
9x+y=11
asked by robert 
research
How is the Spivak and Sharp (2008) study a replication of the prior study by Bales and colleagues (2005)?
asked by todd 
Science
____ bacteria carry out the conversion of gaseous nitrogen to a biologically useful form of nitrogen. My answer is "nitrogenfixing" (This is fill in the blank)
asked by Amy 
Math
At an office, the manager earns 40% more than a first year employee. The employee earns what fraction of the manager earnings? (a) 1/4 (b) 3/4 (c) 5/7 (d) 4/5
asked by Pat 
Money
Sarah and Billy are waiters at Jill's Grill. During the night shift, Sarah makes $86.00 in tips, while Billy makes $102.00. What percentage of Billy tips did Sarah make? (a) 82% (b) 84% (c) 86% (d) 88%
asked by Pat 
physics
A force of 15 N (delivered by a cue) acts on a billiard ball for 0.01 s. Find the magnitude of the a. acceleration of the ball b. final speed of the ball c. distance over which the cue was in contact with the ball
asked by Swastika 
math
There is a 5 to 4 ratio of women to men at the game. If there are 360 women , how many men are at the game (a) 256 (b) 275 (c) 288 (d) 305
asked by Pat 
physics
When rolling along the felt on the billiard table, the ball experiences a frictional force of 0.2 N. a. What is the deceleration of the ball on the felt? b. How far will the ball roll before stopping? c. Explain this in terms of Newtons first law of
asked by Swastika 
physics
A 10^4 kg train moving at 20m/s stops in a distance of 500m. Calculate the force applied by the train's braking system.
asked by Swastika 
math
Three pumps begin draining a 7500gallon pool. At the same time, two pumps begin to drain a 4800gallon pool. Assuming that all pumps drain at the same time., how many gallons are left in the larger pool when the smaller pool finished being drained? (a)
asked by Pat 
physics
A 60 kg of sprinter accelerates from rest at 2.5 m?s^2 East for 4s. What force is acting and what is the final speed?
asked by Swastika 
physics
A jet fighter with mass 5000 kg accelerates from 360 km/hr in 10b s. Compute the minimum thrust required by the jet's engines.
asked by Swastika 
physics
A five kg box is pulled along a frictionless surface by a string just capable of suspending a 15 kg mass at rest. What is the maximum acceleration that can be given to the box?
asked by Swastika 
physics
A 200 kg piano is suspended by a rope from a high building. (Assume the mass of the rope is zero). a. What is the weight of the piano? b. What is the tension of the rope? c. The piano is now hoisted up with an initial acceleration of 1 m/s. What is the
asked by Swastika 
physics
Describe the difference between the quantities, mass and weight. Give a description of two distinctly different ways in which object's weight can be altered.
asked by Swastika 
physics
Calculate the force needed to accelerate a 1 kg ball by 3 m/s: a. in space along way from the earth. b. on the ground in a direction horizontal to the ground. c. on the earth vertically upward.
asked by Swastika 
physics
An astronaut shoots you in space given that the bullet is weightless, could it injure you?
asked by Swastika 
physics
A 70 kg man stands on an accurate spring scale inside the elevator. Given that the lift can accelerate and decelerate at 2.2 m/s^2, Compute the man's maximum and minimum weight.
asked by Swastika 
kinridg
there are 120 skittle in a bag there are 15 skittle left. how many halflive have passed
asked by rahel 
physics
Two cars approach an icecovered intersection. One car, of mass 1.26 103 kg, is initially traveling north at 10.6 m/s. The other car, of mass 1.66 103 kg, is initially traveling east at 10.6 m/s. The cars reach the intersection at the same instant,
asked by Anonymous 
physics
A missile of mass 1.20 102 kg is fired from a plane of mass 5.50 103 kg initially moving at a speed of 3.05 102 m/s. If the speed of the missile relative to the plane is 1.21 103 m/s, what is the final velocity of the plane?
asked by Anonymous 
chem.
A certain reaction has an activation energy of 66.58 kJ/mol. At what Kelvin temperature will the reaction proceed 4.50 times faster than it did at 289 K
asked by Anonymous 
Chemistry
I have to go to work this weekend so I'm trying to get my homework finished. Could you please help me figure out this question? Calculate the mass of 1.00 mol of each of these substances: a.) silicon dioxide (SiO2) b.) diatomic nitrogen (N2) c.) iron ()
asked by Anonomous 
Science (Chemistry)
. Complete all the following for the reaction (NH4)2S + Cd(NO3)2 > CdS(s) + NH4NO3 1. Balance this equation 2. Write the ionic equation 3. Write the net ionic equation
asked by Anonymous 
chem.
the rate limiting step is unimolecular with A as the sole reactant. A+BC+D If A and B are both 0.200M, then the rate reaction is 0.0050M/s A. What is the rate of the reaction if A is doubled? B. starting with original concentrations what is the rate
asked by Anonymous 
math
A & B Antiques issued the following bonds: Date of issue and sale: April 1, 201 Principal amount: $430,000 Sale price of bonds: 100 Denomination of bonds: $1,000 Life of bonds: 10 years Stated rate: 8%, payable semiannually on September 30 and March 31
asked by lol 
spanish
Who forced napoleon bonaparte to abandon plans for an American empire ?
asked by sketch 
Trigonometry
How to simplify 4sin[pi/2 + x] ?
asked by Anonymous