Monday
October 24, 2016

# Posts by Ali

Total # Posts: 759

chemistry
Bringing the real world law into video games could hold various complications. The possible complications outweigh the penitence driven into the prosecuted youngsters for their time wrongdoing. Laws in the real world should be separate from the rules governing an individual&#...
November 3, 2014

physics
wheel is spinning with angular speed 8.6 radian/sec.small fractional force on shaft causes a constant angular deacceleration and wheel come to rest in 192 sec.what is angular acceleration and total angle turned during the slow down
October 31, 2014

physics
starting from rest grinding stone has constant angular acceleration 20 rad/sec at time = 0.reference axis is AB.what is angular displacement of line AB.
October 31, 2014

Algebra
In each bouquet of flowers, there are 4 roses and 6 white carnations. Complete the table to find how many roses and carnations there are in 4 bouquets of flowers? Please help answer thx
October 28, 2014

Algebra
October 28, 2014

Algebra
A collector has 120 movie posters and 100 band posters. She wants to sell 24 movie posters but still have her poster collection maintain the same ratio of 120:100. If she sells 24 movie posters, how many band posters should she sell? Explain thx
October 28, 2014

Algebra
The ratio of North American butterflies to South American butterflies is 5:3. The ratio to South American butterflies to European butterflies is 3:2. There are 30 North American butterflies at the butterfly park. Question A. How many South American butterflies are there? B. ...
October 28, 2014

Algebra
Bob needs to mix 2 cups of orange juice concentrate with 3.5 cups of water to make orange juice. Bob has 6 cups of concentrate. How much orange juice can he make? Please help answer thx
October 28, 2014

Chemistry
If I used 24.6 g of of 0.83 M HC2H3O2 (aq) (0.83 mol per 1 L of solution), how much carbon dioxide would be produced? (IT IS ASSUMED YOUR ANSWER IS IN L CO2 so you do not need to include that in your answer.)
October 25, 2014

chemistry
If I used 0.100L of 0.83 M HC2H3O2 (aq) (0.83 mol per 1 L of solution), how much carbon dioxide would be produced? (IT IS ASSUMED YOUR ANSWER IS IN L CO2 so you do not need to include that in your answer.)
October 25, 2014

chemistry
If you wanted to produce 0.25 L of CO2 gas (at STP), how many grams of sodium bicarbonate would I need to use? Acetic acid is in excess. (IT IS ASSUMED YOUR ANSWER IS IN g NaHCO3 so you do not need to include that in your answer.)
October 25, 2014

Two cards are selected, without replacing the first card, from a standard deck. Find the probability of selecting an ace (A), and then selecting a 4 (B): (choose 2) 0.603% 0.592 0.592% They are dependent events. 0.00592
October 13, 2014

chemistry
To resolve an object in an electron microscope, the wavelength of the electrons must be close to the diameter of the object. What kinetic energy must the electrons have in order to resolve a protein molecule that is 7.00 nm in diameter? Take the mass of an electron to be 9.11&...
October 12, 2014

Given a mean of 25 and a standard deviation of 2.3, what is the z-score of a data value of 29? I don't understand the formula they gave me for the z-score, so I dunno where to start. /:
October 8, 2014

math
When Kaitlin divided a fraction by 1/2,the result was a mixed number.Was the original fraction less than or greater than 1/2? Explain your reasoning
October 7, 2014

explain the steps to extend number pattern?
October 2, 2014

explain what do you need to do to extend number pattern?
October 2, 2014

Biology
What is the water potential of a 5.7 L water in which 2.1 moles of NaCl has been dissolved at 30 degrees celcisus? Help please? Can you show work as well? It'll be greatly appreciated. Thanks in advance.
September 27, 2014

physics
2 point charges are located at the coordinates in the figure, how much work needs to move a point charge q = ]20ƒÊC from B to A? link to photo dropbox/s/x93u73xu2zslfqj/Untitled.png?dl=0
September 11, 2014

physics
4 same conductor balls with charge q = 40 ìC and mass m = 30g mare located at the corners of a square a = 30cm. Now let the charged ball move freely from the initial position. What the final speed the ball can reach?
September 11, 2014

math
How many liters of a 2.5% bleach solution must be mixed with a 10% bleach solution to produce 600 ml of a 5% bleach solution?
September 8, 2014

math
Belle had the choice of taking out a four year car loan at 8.5% simple interest or a Five year loan at 7.75% simple interest. If she borrows \$15,000, how much interest would she pay for each loan? Which option requires less interest?
September 8, 2014

math
Order -3, 5, 16 and -10 from least to greatest. Then order the same numbers from closest to zero to farthest from zero. Describe how your lists are similar. Would this be true if the numbers were -3, 5, -16, and -10.
September 4, 2014

math
The least common multiple of two numbers is 60, and one of the numbers is 7 less than the other number. What are the numbers? Justify your answer. Any help would be greatly appreciated. Thanks in advance.
September 4, 2014

algebra
Yes that's how to do it, you find the midpoint.
September 2, 2014

Math, Calculus
The questions says it has 2 solutions. It wants me to find what x would be if cos(x)=-.49 and it is given that x is on the scale between 0 and 2pi. I know that cosine is the x value, and since cosime is negative in this case the two solutions need to be in the 2nd and 3rd ...
September 2, 2014

Physics ...
Thank you very much .... Your a star
August 28, 2014

Physics ...
116In nuclei are produced at the rate of 10 s-1. Calculate the maximum number of 116In nuclei (number in equilibrium) in the sample if the half-life of 116In is 54 m. So far I have come up with ... The half life = 54m x 60 s-1 = 3.24 x 103 s-1 (In2) / λ = In2 / 3.24 x 10^...
August 28, 2014

science
116In nuclei are produced at the rate of 10 s-1. Calculate the maximum number of 116In nuclei (number in equilibrium) in the sample if the half-life of 116In is 54 m. So far I have come up with ... The half life = 54m x 60 s-1 = 3.24 x 103 s-1 (In2) / λ = In2 / 3.24 x 10^...
August 28, 2014

physics
116In nuclei are produced at the rate of 10 s-1. Calculate the maximum number of 116In nuclei (number in equilibrium) in the sample if the half-life of 116In is 54 m. So far I have come up with ... The half life = 54m x 60 s-1 = 3.24 x 103 s-1 (In2) / λ = In2 / 3.24 x 10^...
August 27, 2014

physics
THANK YOU .....
August 18, 2014

physics
Radioactive nuclei are produced in an irradiated sample at the rate of 10 s-1. If the number in the sample builds up to a maximum of 1000, calculate the mean life and the half-life of the radioactive nuclei Using dN / dt = P - λ N dN / dt = 1000n /10/ 1 = 100 P - λ N...
August 18, 2014

physics
the speed of pendulum is under root 0.91 and time period 1.8 sec what will be its time period in initial frame of reference
August 1, 2014

Chemistry
What is meant by 0.2mol (12g) of glacial acetic acid how can we make ?
July 21, 2014

mathe
Show that a right-circular cylinder of greatest volume that can be inscribed in a right-circular cone that has a volume that is 4/9 the volume of the cone.
July 12, 2014

Spanish
Can someone please check it for me and double check verbs and subjunctives are correct. Thank you, I really appreciate it.
July 6, 2014

Spanish
I doubt that there is any political issue that could be solved by just sitting around and not doing nothing about it. The world is facing many problems in this era. The most common ones are poverty, pollution and war. How is it possible that there are multi millionaire people ...
July 6, 2014

Spanish
Discuss your opinions and ideas about three different popular political issues. Include how you think things should be and what you wish certain people would do about it. Articulate your ideas on paper (one-page, typed) using the subjunctive.
July 6, 2014

Algebra
f(x)=-(x-1)^2+4
July 4, 2014

chem school
calculate the volume of 2.04 m al l oh 3 needed to neutralize 22.0 ml of 880m h2so4
June 24, 2014

marketing
thanks
June 11, 2014

marketing
I need to find companies that are a small business under 20 employers to try to contact for meetings.do you know any companies that are a small business that are under 20 employers.
June 11, 2014

Math
Suppose you spin a spinner that is equally likely to land on any one of the numbers from 1 to 8. Which event has the same probability as P(not 2 or 3)?
May 21, 2014

math
sec( pi/7)-sec(2pi/7)+sec(3pi/7)
May 14, 2014

Aths
Suppose you are an astronaut spacewalking outside your spacecraft to repair a broken part. In fixing the part, you have drifted several meters from your spacecraft. You are now at rest and are still holding a bag filled with tools. How could you return to your ship?
May 11, 2014

Physics
A ball with a mass of 12 g is moving at 15 m/s. It collides with a second ball with a mass of 36 g moving at 5 m/s in the same direction. After the collision, the 12-g ball moves at 6.0 m/s. How great is the change in momentum of the z36-g ball?
May 11, 2014

math
May 7, 2014

math
the a
May 7, 2014

chemistry
Calculate the molar it of a solution that contains 5.4 get of sodium sulfate dissolved in enough water to make 3.5 L of solution
May 6, 2014

Math (check)
so its 1/2?
May 4, 2014

CHEMISTRY HELP !!!!
a.) which of the following reactions should have the larger emf under standard conditions & why? CuSO4 (aq) + Pb (s) goes to PbSO4 (s) + Cu (s); Cu(NO3)2 (aq) + Pb(s) goes to Pb(NO3)2(aq) + Cu(s) b.) Calculate delta G for the reaction.
April 19, 2014

Calculus Help
I did put these answers in but they're marked wrong Thank you!
April 19, 2014

Calculus Help
A high-speed bullet train accelerates and decelerates at the rate of 4 ft/s2. Its maximum cruising speed is 90 mi/h. (Round your answers to three decimal places.) (a) What is the maximum distance the train can travel if it accelerates from rest until it reaches its cruising ...
April 19, 2014

Physics
A 77 kg window cleaner uses a 13 kg ladder that is 7.1 m long. He places one end on the ground 3.8 m from a wall, rests the upper end against a cracked window, and climbs the ladder. He is 3.9 m up along the ladder when the window breaks. Neglect friction between the ladder ...
April 16, 2014

how should the ph of a 0.1 m solution of nac2h3o2 compared with that of a 0.1 m solution of kc2h3o2?
April 10, 2014

Geometry
what is the formula of a base area for a right trapezoidal prism?
April 6, 2014

Chemistry
I am thrown off by this question because they don't give a molecule to work with. Also i don't know how i would work the acid... help! A 195 mL solution of a dilute acid is added to 102 mL of a base solution in a coffee-cup calorimeter. The temperature of the solution ...
March 29, 2014

physics
If the speed of the cart at the first photogate is 2.3 m/s, and the speed of the cart at the first photogate is 1.8 m/s, what is the percentage change in the speed of the cart (LEAVE OUT the % symbol)?
March 20, 2014

Consider the function f(x)=4sqrt(x)+4 on the interval [2,5] . Find the average or mean slope of the function on this interval _______ <---A By the Mean Value Theorem, we know there exists a c in the open interval (2,5) such that f'(c) is equal to this mean slope. For ...
March 7, 2014

f(x) -2x^3+2x^2-3x+2 Find the average slope of this function on the interval (–3–1) ________ <--A By the Mean Value Theorem, we know there exists a c in the open interval (–3–1) such that f'(c) is equal to this mean slope. Find the value of c in the ...
March 7, 2014

Physics
A 96.0-g wooden block is initially at rest on a rough horizontal surface when a 11.4-g bullet is fired horizontally into (but does not go through) it. After the impact, the block–bullet combination slides 6.5 m before coming to rest. If the coefficient of kinetic friction...
March 4, 2014

Chemistry
A solution is prepared by placing 27.8 g of KCl in a 0.700 L volumetric flask and adding water to dissolve the solid, then filling the flask to the mark. What is the molarity of an AgNO3 solution if 22.1 mL of the KCl solution react exactly with 43.0 mL of the AgNO3 solution?
March 2, 2014

The linearization at a=0 to sqrt(1+2x) is A+Bx where A is____ and where B is _____? A=? B=? Ty
February 28, 2014

The differential of the function y=(x^2+6)^3 is dy=______dx. When x=2 and dx=0.05, the differential dy=_______? A) dy=______dx? B) the differential dy=_______?
February 28, 2014

Gravel is being dumped from a conveyor belt at a rate of 30 cubic feet per minute. It forms a pile in the shape of a right circular cone whose base diameter and height are always the same. How fast is the height of the pile increasing when the pile is 24 feet high? Recall that...
February 28, 2014

At noon, ship A is 50 nautical miles due west of ship B. Ship A is sailing west at 18 knots and ship B is sailing north at 23 knots. How fast (in knots) is the distance between the ships changing at 3 PM? (Note: 1 knot is a speed of 1 nautical mile per hour.)
February 28, 2014

The altitude of a triangle is increasing at a rate of 2500 centimeters/minute while the area of the triangle is increasing at a rate of 3500 square centimeters/minute. At what rate is the base of the triangle changing when the altitude is 7000 centimeters and the area is 87000...
February 28, 2014

Statistics
Have you manged to solve this question ?
February 28, 2014

If it requires 5.5J of work to stretch a particular spring by 2.3cm from its equilibrium length, how much more work will be required to stretch it an additional 4.5cm ? Express your answer using two significant figures. W=_____ J?
February 25, 2014

derivative (fg)'
This problem tests calculating new functions from old ones: From the table below calculate the quantities asked for (fg)'(–2) x 1 –17 0 –2 f(x) 3 –4335 0 0 g(x) 1 –10097 1 –17 f(x) 7 799 0 4 g(x) 3 1767 –1 27 (fg)'(–2) = ??? ty
February 22, 2014

If 7000 dollars is invested in a bank account at an interest rate of 7 per cent per year. A) Find the amount in the bank after 6 years if interest is compounded annually? B) Find the amount in the bank after 6 years if interest is compounded quaterly? C) Find the amount in the...
February 21, 2014

Use implicit differentiation to find the slope of the tangent line to the curve at the point (1,3) -4x^2+4xy-2y^3=-46 m=____? ty guys so much!
February 21, 2014

For what values of a and b is the line –2x+y=b tangent to the curve y=ax^3 when x=–2? a= ? b= ?
February 14, 2014

physics
0.5 m/s^2
February 4, 2014

T1/2(Ra-226) = 1602 years What is the activity of 1 gram of Ra-226? Give the answer in Ci and Bq? What would be this activity after 1T1/2 and 5T1/2? Would appreciate if someone could show me how to do this question. Thanks.
February 3, 2014

Science
Someone Helpful is correct. I got 4/4 100%
January 22, 2014

economics
Consider a consumer who has an experienced utility function given by . Let denote the market price of good , and assume that it remains fixed throughout the problem. The company selling the good starts an advertisement campagin that has the following effect on the consumer: ...
January 22, 2014

physics
a 4.5kw electric motor is 90% efficient.how much energy it use in 20 seconds.
December 1, 2013

Chemistry
Why is the solubility of butane 6.1 mg / 100 g water, yet hexane is immiscible in water?
November 6, 2013

number 1 the answar is 5
October 29, 2013

physics
a large nuclear power plant generates electric energy at the rate of 1000 MW. how many joules of electricity does the plant generate in one day? what is the mass of this much energy?
October 25, 2013

math
what type of numbers is found an odd number of times in the table
October 23, 2013

Math
Central middle school sold 50 tickets for one night at the school play. Student tickets sold for 2\$ each and adult tickets sold for 3\$ each. They took in 135\$. How many of each type of ticket did they sell?
October 23, 2013

Math
Central middle school sold 50 tickets for one night at the school play. Student tickets sold for 2\$ each and adult tickets sold for 3\$ each. They took in 135\$. How many of each type of ticket did they sell?
October 23, 2013

Chemistry
Thank you so much!
October 22, 2013

Chemistry
So when solving this equation, we only use two of the reactants and not all three? And since there is more than one reaction, do we use the net ionic equations of both as the answer for this question or just one equation? So would the other reaction be this: CuCl2(aq) + Pb(NO3...
October 22, 2013

Chemistry
Solutions of potassium carbonate, copper(II) chloride, and lead(II) nitrate are each added to a beaker. Will any compound(s) precipitate from solution? Write a balanced net ionic equation for any precipitation reaction that occurs. I have gotten this so far: K2CO3(aq) + CuCl2(...
October 22, 2013

Water Treatment
100% 5 2
October 19, 2013

Chemistry
Emission Analysis of Aqueous Solutions of Groups IA and IIA Metal Salts A student records two potassium emission spectra: 1) one using 0.10 M KNO3 solution; 2) one using 0.10 M K2SO4 solution. Will significant differences be observed in the two emission spectra? Why or why not?
October 14, 2013

Chemistry
Identification of an unknown powdered metal by reaction with HCl: Why does the pH of the HCl solution initially increase very slowly when an unknown metal is first added to the acid solution, but gradually increase at a faster rate as the reaction proceeds to completion?
October 6, 2013

math
t is a 7-digit even number.there is no repetition of digits.the digit 5 is in in thousands place.the greatest digit is in millions place.the digit in the hundred thousands place is twice the digit in the hundreds place.the digit in the hundreds place is twice the digit in the ...
September 18, 2013

math
Tony is 1/2 of a mile ahead of Laura on a jogging path. If Tony is running at 5 miles per hour, and Laura is running at 7 miles per hour, how long will it take Laura to catch up with Tony?
September 12, 2013

physics
A ladder 7.65 m long leans against the side of a building. If the ladder is inclined at an angle of 76.5° to the horizontal, what is the horizontal distance from the bottom of the ladder to the building?
September 1, 2013

Math
A particle travels along the curve c(t) = (6t^3-6, 7t^2-4). If time t is measured in seconds and if the coordinates are measured in meters, then what is the particle's speed at time t=5?
August 7, 2013

Math
Calculate the length of the path over the given interval: (sin6t, cos6t), 0<t<pi
August 7, 2013

Math
Calculate the length of the path over the given interval: c(t) = (3t^2, 4t^3), 2<t<5
August 7, 2013

Math
Use a formula for slope of a line tangent to a parametric curve to find dy/dx for the curve c(s) = (s^(-1)-6s, -7s^3) at the point with s=-4
August 6, 2013

Math
Calculate the length of the path over the given interval: c(t) = (3t^2, 4t^3), 2<t<5
August 6, 2013

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