Questions Asked on
January 1, 2015

Physics
A block and tackle with a velocity ratio of 5 is used to raise a mass of 25kg through a vertical distances of 40cm at a steady rate.if the effort is equal to 60N,determine.(a)The distance moved by the effort.(b)The workdone by the effort in lifting the
asked by Rose 
physics
A ball strikes against the floor and returns with double velocity.In which type of collision is it possible?
asked by Anonymous 
chemistry
Acetylene(C2H2), an important fuel in welding, is produced in the laboratory when calcium carbide (CaC2) reacts with water: CaC2(s) + 2H20(l) → C2H2(g) + Ca(OH)2(aq) For a sample of acetylene collected over water, total gas pressure (adjusted to
asked by vishal 
Math
(Find the slope and y intercept of the graph of each equation) 2y + 4n = 6x
asked by lol 
Criminology
According to Hirschi and Gottfredson, the personal characteristics of most whitecollar workers are those that we would expect to produce: A. conformity in behavior. B. whitecollar crime. C. street crime. D. Both b and c I think it's D, but not too sure.
asked by Pat 
Math
A tractor tire has a diameter of 6 feet and is revolving at a rate of 45 rpm. At t=0, a certain point is at height 0. Write an equation to describe the height of the point above the ground after t seconds. The answer is apparently d=3cos(3pi/2)t +3 But I
asked by Andrew 
chemistry
what is the ph of the resulting mixture when 10.00ml of 0.400 mol/l KOH is added to 15.00 ml of 0.300 mol/l acetic acid?
asked by mickey 
Maths
John wants to calculate the sum of a geometric series with 10 terms, where the 10th term is 5 859 37... ... series with 10 terms, where the 10th term is 5 859 375 and the common ration is 5/3. John solved the problem by considering another ... show more
asked by Alan Mathews 
physics
A golfer takes two putts to get his ball into the hole once he is on the green. The ﬁrst putt displaces the ball 3.4 m east, and the second 6.55 m south. What displacement would have been needed to get the ball into the hole on the first putt. answer in
asked by carlos 
read
does u say do or does like in does/do you have a pet
asked by jayquanna 
earth science
one reason the moon might be a better place than earth to study the universe is there is almost no atmosphere. True or False MY guess is false
asked by Elena 
earth science
the Julian calendar is the calendar we currently use. True or false. my guess is true
asked by Elena 
physics
A car moves at a constant speed of 60 km/hr for 1 km and 40 km/hr for next 1 km. What is the average speed of the car ?
asked by sana 
^BiOlOgY^
Need Help~How does EXCRETION occur in SNAKES? What iz thier ORGAN ov EXCRETION? What form iz thier excretory waste?
asked by Ekingdeft 
physics
A stone is thrown into water pond forming 10 waves in 5 seconds. The diameter of the first crest is 13 m and the diameter of the last crest is 4m. Find a.the periodic time b.the frequency c.the wave length d.the wave velocity
asked by jo 
History
After you have read the following, write a short essay comparing and contrasting life in the Middle Ages to today. Is there anything that was better about life then? The next time you are washing your hands and complain because the water temperature isn't
asked by Olivia 
science
A 10 meter long seesaw has a boy of mass 20 kg sitting on one end . How far away from him should a girl of mass 30kg sit to balance the seesaw?
asked by Zahra ferdous 
science
What is the hook's law?
asked by Zahra ferdous 
Physics
What force is required to give a 1kg body a velocity of 5m/s after acting for 5sec? I know I can use F=mxa What do I do with the 5sec? Thanks
asked by Steph 
government
What is constitution?
asked by kemi 
Math
Reiny ..thanks for the formula and example. I tried it and i get that both sets of triangles are congruent but it is multiple choice with one answer. I don't know what i am doing wrong. How do I determine which two triangles on a graph are congruent.
asked by Marie 
Geometry
If triangle ZXY is an equilateral triangle and the measure of W equals 34 degrees, what is the measure of the triangle WXZ? Work: XZ bisects WXZ and ZXY ; since W is 34 degrees, than Y is 34 degrees and since ZXY is equilateral, that also means that Z is
asked by Kathy 
Biology
Photosynthesis and cellular respiration are often described in two ways: (1) they are chemically opposite; and (2) they have a relationship to each other. Explain what these two statements mean. I need help with this please.
asked by Sara 
math
Janet invested $10,000, part at 2% and part at 12%. If the total interest at the end of the year is $600, how much did she invest at 2%?
asked by karmen 
Criminology
Which of the following is a drugrelated crime? A. Buying drugs on the street from a lowlevel dealer B. Selling marijuana to juveniles C. Snatching a purse to obtain money to purchase drugs D. Using crack cocaine I am stuck between B & D.
asked by Pat 
ELEMEMTARY MATH
WHAT iS THE SQUARE ROOT OF 12 MY ANSWER IS 2, AM I CORRECT?
asked by VALERIE 
Math
A Ferris wheel makes 3 revolutions per minute. If the diameter is 20 feet, write an equation to describe the height off the ground of a particular seat after t seconds. I got d=10cos(6pi)t as the answer, is this correct?
asked by Andrew 
chemistry
a 2.00l buffer contains 1.00 mol HNO3 mixed with 1.00mol NaNO2 a. write the relevant ionization equation for this buffer. b. determine its pH c. determine the new pH if 1.00g of NaOH is added to the buffer
asked by michelle 
calculus
this is an exploration in my textbook that we are assigned to do. it basically means we are supposed to use our graphing calculator to help. my calculator won't work for some reason so I'm trying to do it without and cannot figure it out. the question is
asked by emilia`` 
French
Would the contraction for du and les be des?
asked by Anonymous 
Physics
A 6kg mass is acted on by a force for 60sec and acquires a speed of 10m/s. What is the value of the force? I have calculated this as below: F = ma Therefore F = 6*10/60 F=1N Am I on the correct path? Thank you kindly
asked by Steph 
algebra
Using x as their common factor, represent the numbers and their sum if: Two number have ration of 4 to 3
asked by ER 
Biology
A cell is lacking in its supply of amino acids. Which of the following will occur? A mRNA will not be formed because enzymes may not be present. B The ribosomes will not work properly because there will be no proteins. C tRNA may not be able to fulfill
asked by May 
AP Chemistry
Consider the following reaction: CH3X + Y > CH3Y + X At 25 degrees Celcius the following two experiments were run, yielding the following data: Experiment 1: [Y]0 = 3.0 M [CH3X] (mol/L) Time (hours) 7.08*10^3 1.0 4.52*10^3 1.5 2.23*10^3 2.3 4.76*10^4
asked by Kyle 
math
How many subset of 6 can I get from 18 elements
asked by joe 
Rocket Science
Calculate the minimum change in velocity (delta V or ∆V) required for the Space Shuttle to decrease its altitude to 60 miles if it’s orbiting with an apogee of 246 miles and a perigee of 212 miles above the surface of Earth
asked by Karen 
Physics
A force of 270N acts on a mass of 13.5kg for 13sec. Calculate a) the acceleration b) the final velocity c) the distance covered. a)F=m*a, so 270=13.5*a/13, answer 260m/s b)Not sure which formula. c)Formula d=v*t, once velocity is worked out in question b).
asked by Steph 
algebra 2
X.2 +8x +15/x+5
asked by mariam 
Physics 1
a piece of stone was dropped from the top of the building. the stone took 10 s to hit the ground. what is the veocity of the stone just before it hit the ground?
asked by Marvin I. Rojas