Wednesday
September 17, 2014

Posts by jason


Total # Posts: 1,090

physic
Predict the horizontal distance a cannon on a 15 m cliff will shoot if it's initial velocity is 140 m/s and it's inclined at 15 degrees.
September 14, 2014

Science (college level)
1. What solar temp is needed for the peak intensity of radiation to occue at .2 micrometers? Remembering that humans can see light only between .4 and .7 microns, would the sun look brighter or dimmer at this new temp? 2. How much variation in earth orbital distance from the ...
September 12, 2014

Chemistry
Ok, thank you! this makes a lot of sense. and the pKa is the -logKa? Ka=[NH4^+]=110?
August 3, 2014

Chemistry
pH=pKa+ log(conjugate base/conjugate acid) I have it in my notes, I just can't figure out the steps to solve this problem, or how it applies.
August 3, 2014

Chemistry
A solution made up of 1.00 M NH3 and 0.500 M (NH4)2SO4 has a pH of 9.26. a. Write the net ionic equation that represents the reaction of this solution with a strong acid. b. Write the net ionic equation that represents the reaction of this solution with a strong base. c. To ...
August 3, 2014

Math
there are 9 blue marbles, 4 black marbles, 5 white marbles and 6 red marbles. If the probability of drawing a blue marble is now 1/3, how many of the 6 marbles removed were blue?
August 3, 2014

phi
How would the Kantian moral theory apply in resolving the negative effects on a community? (Points : 1) By treating persons in the community as ends in themselves, then companies will strive to provide quality products as well as to remedy any negative effects imposed on the ...
July 29, 2014

phi
Which of the following does Peter Singer assert about the principle of equality? (Points : 1) People should have equal rights because they are factually equal. People with higher abilities, it stands to reason, should have greater rights. Different groups of humans should ...
July 20, 2014

Math
A bus tour company charges a flat fee for renting out the bus, and an additional amount for each person. If the price is quoted at $382 for 12 people and $430 for 16 people, what is the flat fee?
July 4, 2014

math
A formula has to be written that takes all the money into account and the time that the carpenter's will spend on the deck. We know that the store charges $1000 for materials and $30/hr on labor. So with that information we can say this: $1000 + ($30 * t) = total Where t ...
June 15, 2014

Physics
I think the answer might be 1361 N. The larger force will pull the rope in the direction of that force causing the tension to be 1361 N.
June 14, 2014

Physics
a) F = ma this is Newton's second law. For each team you are given F and m All you have to do is solve for a: a = F/m That should be easy to do. b) The tension is easy too, both teams are pulling on the horizontal so it's merely 1361 N - 1350 N = 11 N.
June 14, 2014

financial
The formula for compound interest (which this problem asks about) is: A = P(1+(r/n))^(nt) Where A is the amount you end with, P is the original/beginning amount, r is the interest rate, n is the number of times interest is compounded, and t is the number of years. So because n...
June 14, 2014

Ethics
The government doesn't have any imperative to enforce social and moral expectations on business, but it does anyways. Through various government agencies they direct the operations of businesses which is enforcement. This enforcement comes from regulations that were ...
June 14, 2014

Statistics
Suppose the mean income of 35-year-olds in the US is $25,000. A random sample of 150 35-year-olds in California results in a sample mean income of $26,600 and a sample standard deviation of $3800. At the 5% significance level, ca we conclude that the true mean income of 35-...
May 23, 2014

chemistry
which of these reactions if spontaneous? (a) Fe^0 + Mg +2 --> Mg^0 +Fe+2 (b) Fe+2 + Mg ^0 --> Fe^0 + Mg +2 write the half cell equations for the spontaneous reaction. which element is oxidized and which is reduced?
May 16, 2014

Physics 270-1 Applied
A rock is thrown down with an initial speed of 30.0ft/s from a bridge to the water below. It takes 3.50s for the rock to hit the water. (a) Find the speed (in ft. /s) of the rock as it hits the water. (b) How high is the bridge above the water?
May 8, 2014

Game Development
In relation to game AI what is a flocking behaviour? Give an example of flocking behaviour in a game.
May 7, 2014

Trig
Use the given information to evaluate sin (a+b). Exact answers only. No decimals. Tan a = 4/3, cos b ='-12/13; neither a nor b are in quadrant III.
May 7, 2014

Physics
A girl throws a ball at a fence 10m away. The ball is 2m from the ground when it leaves her hand with an initial velocity of v=8 i+8 j m/s. When the ball hits the fence its horizontal velocity component is reversed (the vertical velocity component is unchanged). Where does the...
May 7, 2014

Statistics
In a study of 200 students, 42 were found to have a GPA greater than 3.0. Find a 98% confidence interval estimate of the proportion, p, of all students that have a GPA greater than 3.0.
May 4, 2014

Physics
is there any way i can get ur email so i can send the pic of the question
May 1, 2014

Physics
A block of mass M1positioned on a slope (at an angle  ) is connected by means of an inextensible wire, of negligible mass, to another mass, m2, suspended from a frictionless pulley. The coefficients of static and dynamic friction between the slope and M1are 0.3 and 0.2...
May 1, 2014

math
marissa pours 1 1/2 cups of punch in each glass how many fluid ounces is each serving?
April 22, 2014

chemistry
.93 volts, .41 volts, and 1.99 volts. I tried to find them out with "doctor" bobs way but I couldn't do them. My teacher did not even bother to teach us how to do this. For future reference Dr. Bob, instead of asking for one's work, how about at least show ...
April 11, 2014

Physics
A force platform is a tool used to analyze the performance of athletes measuring the vertical force that the athlete exerts on the ground as a function of time. Starting from rest, a 60.0 kg athlete jumps down onto the platform from a height of 0.600 m. While she is in contact...
April 8, 2014

Physics
An astronaut of mass 84.0 kg is taking a space walk to work on the International Space Station. Because of a malfunction with the booster rockets on his spacesuit, he finds himself drifting away from the station with a constant speed of 0.570 m/s. With the booster rockets no ...
April 8, 2014

Physics
Most of us know intuitively that in a head-on collision between a large dump truck and a subcompact car, you are better off being in the truck than in the car. Why is this? Many people imagine that the collision force exerted on the car is much greater than that experienced by...
April 8, 2014

econ
68
April 7, 2014

physics (clear answer)
Multiple-Concept Example 10 provides one model for solving this type of problem. Two wheels have the same mass and radius of 5.0 kg and 0.47 m, respectively. One has (a) the shape of a hoop and the other (b) the shape of a solid disk. The wheels start from rest and have a ...
April 3, 2014

physics (clear answer)
The wheels, axle, and handles of a wheelbarrow weigh W = 56.2 N. The load chamber and its contents weigh WL = 584 N. The drawing shows these two forces in two different wheelbarrow designs. To support the wheelbarrow in equilibrium, the man's hands apply a force to the ...
April 3, 2014

physics (clear answer)
Two children hang by their hands from the same tree branch. The branch is straight, and grows out from the tree trunk at an angle of 26.1° above the horizontal. One child, with a mass of 43.6 kg, is hanging 1.31 m along the branch from the tree trunk. The other child, with...
April 3, 2014

Physics
A particular garden hose has an inside diameter of 15/16 in. The nozzle opening has a diameter of 5/16 in. When the flow speed of the water in the hose is 0.58 m/s, what is the flow speed through the nozzle?
April 3, 2014

Physics
A spherical hydrogen-filled balloon is used to lift a load of 5950 N (in addition to the weight of the hydrogen). Suppose the density of the air is 1.18 kg/m3. Find the minimum necessary radius for the balloon
April 3, 2014

Phyiscs
A hollow copper tube (diameter = 4.01 cm) is sealed at one end and loaded with lead shot to give a total mass of 0.218 kg. When the tube is floated in pure water, what is the depth, z, of its bottom end?
April 3, 2014

Physics
A 4.8 kg container of water sits on a scale A. A cube of aluminum with sides of length 11.0 cm is suspended from a spring scale B so that half of the block is submerged in the water. What is the reading (in N) on spring scale B The continual question is What is the reading (...
April 3, 2014

chemistry
calculate the grams of solute neede to prepare 24 grams of a 13.5% by mass scurose (c12h22o11) solution
March 27, 2014

math
Let y=3(x-4)^2 -3 a) Show that y=3x^2 -24x +45 b) For the graph of y find both x intercepts by solving the equation 3x^2 -24x +45 =0 A) direction of opening B) x intercepts C) y intercept D) Axis of Symmetry E) Vertex F) max or min
March 9, 2014

Math
A person travels 8 mi, due north, 3 mi, due west and 7 mi due south how far are they from were they started?
March 8, 2014

chem
Hydrogen iodide can decompose into hydrogen and iodine gases. 2HI(g) mc026-1.jpg H2(g) + I2(g) K for the reaction is 0.016. If 0.148 atm of HI(g) is sealed in a flask, what is the pressure of each gas when equilibrium is established?
March 5, 2014

math
a piece of wire 24 ft. long is cut into two pieces. one piece is made into a circle and the other piece is made into a square. Let the piece of length x be formed into a circle. allow x to equal 0 or 24, so all the wire is used for the square or for the circle. How long should...
March 4, 2014

Physic
The figure below shows a block of mass m resting on a 20¡ã slope. The block has coefficients of friction ¦Ìs = 0.73 and ¦Ìk = 0.53 with the surface. It is connected via a massless string over a massless, frictionless pulley to a hanging...
March 3, 2014

Literature
thanks
March 1, 2014

Literature
yes
March 1, 2014

Literature
Can someone help me with, the book "Invisible Man" and which character wore the mask.
March 1, 2014

science
Vanadium has several oxidation states. write correct formulas for vanadium oxide and vanadium oxide.
February 25, 2014

science
Vanadium has several oxidation states. write correct formulas for vanadium (iii) oxide and vanadium (v) oxide.
February 25, 2014

Statistics
Suppose x has a distribution with μ = 11 and σ = 5. (a) If a random sample of size n = 45 is drawn, find μx, σ x and P(11 ≤ x ≤ 13). (Round σx to two decimal places and the probability to four decimal places.)
February 25, 2014

Chemistry 2
A solution of NaOH (aq) contains 8.2 grams of NaOH(s) per 100.0 mL of solution. Calcualte Ph and POH at 25 degrees celsiuis
February 21, 2014

Chemistry 2
Calcualte PH and POh of an aqueous solution that is 0.050 M in HCL and 0.085 M in HBr at 25 degrees C
February 21, 2014

Science
Pu$$y !
February 17, 2014

english literature
can you help me comment on this theme please. awe and amazement
February 8, 2014

Pre Algebra
I have to create two dice (each on has six sides) they have to be numbered in such a way that the probability of rolling the numbers 1-12 are the same? I know this is a function but I am having trouble.
February 7, 2014

physics (clear answer)
An airplane traveling north at 400 m/s is accelerated due east at a rate of 50 m/s2 for 6 s. If the effects of air resistance and gravity are ignored, what is the final speed of the plane?
February 5, 2014

physics (this one is killing me clear answer)
At time t = 0 s, a puck is sliding on a horizontal table with a velocity 3.60 m/s, 35.0° above the +x axis. As the puck slides, a constant acceleration acts on it that has the following components: ax = –0.360 m/s2 and ay = –0.980 m/s2. What is the velocity of ...
February 4, 2014

physics (clear answer)
A golfer hits a shot to a green that is elevated 3 m above the point where the ball is struck. The ball leaves the club at a speed of 16.0 m/s at an angle of 38.5° above the horizontal. It rises to its maximum height and then falls down to the green. Ignoring air ...
January 27, 2014

geometry
A cylinder has a height of 16 cm and a radius of 5 cm. A cone has a height of 12 cm and a radius of 4 cm. If the cone is placed inside the cylinder as shown, what is the volume of the air space surrounding the cone inside the cylinder? (Use 3.14 as an approximation of π.)
January 23, 2014

Algebra
Thank you Ms. Sue, that helps a lot!
January 20, 2014

Algebra
A road map has a scale of 5/8 for every 125 miles. How many inches would be needed to represent 1000 miles on the map?
January 20, 2014

Physics 221
An electron is accelerated by a uniform electric field (1000 V/m) pointing vertically upward. Use energy methods to get the magnitude and direction of its velocity after it moves 0.10 cm form rest. Does the electron gain or lose potential energy?
December 31, 2013

chemistry
PV = nRT P = pressue V = volume n = moles R = 8.31 T = Temperature (0c = 273K) (103.0)(26.4) = n(8.31)(283) 2719.2 = n(2351.73) 2719.2 / 2351.73 = n m = 1.16
December 4, 2013

Reading
the wrong word is on. it is supposed to be in. you`re welcome.
November 26, 2013

electromagnets
A current loop with radius 20 cm and current 2 A is in a uniform magnetic field of 0.5 T. Considering all possible orientations of the loop relative to the field, what is the largest potential energy difference (in Joules) you can find between two orientations?
November 22, 2013

electricity and magnetism
A current of 20 mA flows in a single circular loop with a radius of 2 meters. A uniform magnetic field of 1.2 T points parallel to the plane of the loop. What is the magnitude of the magnetic moment of the loop in A-m^2? What is the magnitude of the torque on the loop in N-m?
November 22, 2013

literature
I have one more confusing question regarding this. And Thank you Ms.Sue for answering the last question! Franklin's humor in Witch Trial at Mt. Holly depends upon the belief that... a)the belief that religion takes precedence over science b)the belief that the physical ...
November 19, 2013

literature (bejamin Franklin)
I have one more confusing question regarding this. And Thank you Ms.Sue for answering the last question! Franklin's humor in Witch Trial at Mt. Holly depends upon the belief that... a)the belief that religion takes precedence over science b)the belief that the physical ...
November 19, 2013

literature (bejamin Franklin)
As a poor boy, Franklin realized that he could not buy many books, but he came up with an idea that could give people access to as many books as they wanted. This idea was essentially.. a) get a government grant b)get the government to buy the books c)have all your friends ...
November 19, 2013

Math
An irrigation pump can pump 250 liters of water per minute. How many hours should the system work to water a rectangular field 75 m by 135 m to a depth of 3 cm?
November 17, 2013

pre cal
ah i forgot to clarify the 1/2L is being multiplied by the squareroot of T/u
November 11, 2013

pre cal
How do I express this relationship in a language of variation? I know how to do basic ones but this one is really advanced looking. f=1/2L squarert T/u
November 11, 2013

History (black death)
Which best describes the right answer to: The Black Death first came to Europe- a) through sailors in Italian ports. or b) through merchants trading in France. I know that it was spread through ship. But the wordings that she put is so confusing....
November 10, 2013

History
Is dark ages same as early middle ages???
November 9, 2013

History
Which do you think best describes the word Feudalism?? a system designed to increase the power of lords rather than vassals or a reciprocal personal economic and political relationship between lords, vassals and peasants
November 9, 2013

Math
Find the points of intersection of the parabolas y=1/2x^2 and y=1-1/2x^2. Show that at each of these points the tangent lines to the two parabolas are similar Answer (+-1,1/2) Please show and explain all steps thank yo
November 6, 2013

literature
In "How the World Began" what we now consider the North American continent, Native Americans saw as Answer a-turtle's back b-a pancake c-a great American desert d-the Land of Oz In "How the World Began," Iagetci's fall from the upper world is ...
November 5, 2013

Chem
I have done this so many way and can't seen to get the right answer please help! I'm looking for the Concentration of NiCl2, M from the following Volume of 0.390 M NiCl2, mL 4.0 3.0 2.0 1.0 Volume of water, mL, 0 1.0 2.0 3.0 Absorbance 0.858 0.644 0.429 0.215 I keep ...
November 3, 2013

Science - Physics, I need help with both please.
A 57.0 kg diver dives from a height of 15.0 m. She reaches a speed of 14.0 m/s just before entering the water. What was the average force of air resistance (e.g., friction) acting on the diver? Bonus: What is the force of friction underwater if she reaches a depth of 2.5 m ...
November 2, 2013

Math
the average american drinks 29 more cokes per year than the average mexican. if together they consume 555 cokes per year how many cokes are consumed each year by the average american and how many by the average mexican? i also have to identify the constraints.
October 31, 2013

biology
what is one example of a specific case used by scientists for organ cloning?? (therapeutic cloning)
October 30, 2013

help...
Identify the facilities and amenities of disney cruise lines.
October 30, 2013

physics
A 2.0 micro Farad capacitor in a circuit in series with a resistance of 1.0 mega ohms is charged with a 6.0v battery. How long would it take to chage the capacitor to three fourths of its maximum voltage.
October 29, 2013

physics
Show that the time for the voltage in the RC circuit to rise to (Vo/2) "half-max" is t1/2 = T ln 2
October 29, 2013

physics
With V = Voe^-(t/T), how many time constants does it take for a capacitor to discharge less than 1% of its initial voltage?
October 29, 2013

physics
What is the voltage across a capacitor after a time of two constants when a. charging from zero voltage and b. discharging from a fully charged condition?
October 29, 2013

physics
Show that the magnitude of the charge on a capacitor is given by Q = (Qo(1-e^-(t/T))) and Q = Qoe^-(t/T) for charging and discharging, respectively.
October 29, 2013

math
Find the inverse of each of these functions a)f(x)=x/x+2 b)f(x)=2x/5-x c)f(x)=3x/2x+1
October 17, 2013

quantum physics
Help please!!!
October 17, 2013

Marine Pollution
Why there is a need for reception facities for ship operation inside the 50 called special areas?
October 14, 2013

algebra 2
find the value or expression f(x)= x^2, g(x)=x-3 if (f*g)(c)
October 13, 2013

Quantum Physics
Time is running out for you. No money means no score sufficient to get the certificate.
October 12, 2013

Quantum Physics
So, are you ready to transfer them to my personal account at the Bank of Nigeria ?
October 12, 2013

Quantum Physics
For $1000, I'd give you the right answer.
October 12, 2013

Quantum Physics
OK, here is the real answer: theta = e*a*t phi = s*H*i*t Job done!
October 12, 2013

Quantum Physics
For 8d. Theta = pi Phi = 0
October 12, 2013

Chemistry
If 5.300 g of C6H6 is burned and the heat produced from the burning is added to 5691 g of water at 21 °C, what is the final temperature of the water? 2C6H6(l) +15O2 (g)----> 12CO2(g)+6H2O(l) +6542
October 6, 2013

American History
informal changes to the constitution include. A.Treaties B.Laws passed in congress C. Supreme court decisions D. All of the above
October 2, 2013

Physics
A car accelerates uniformly from rest to a speed of 23.9 km/h in 8.2 s. Find the distance it travels during this time. Answer in units of m
October 1, 2013

Algebra 1
A rectangle has a length of 4x and a width of 4x-2. its perimeter is 12 inches find the length and width
September 30, 2013

Math
yes
September 25, 2013

Physics
A plane is flying horizontally at a speed of 290m/s. He drops a package (ignoring air resistance). A)If it take 15s for the package to hit the ground, how high above is the plane? B) How far (horizontally) before the island should Steven drop the package? C) Assuming the ...
September 22, 2013

Pages: 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | Next>>

Search
Members