Tuesday
October 21, 2014

Posts by Chris


Total # Posts: 2,210

Trigonometry
In a right triangle, CT = 6, CA = 3, and m<CAT = 90. What is the value of cot C ? CT= hypo CA= Opp.
January 18, 2012

Physics
A small ball is launched at an angle of 30.0 degrees about the horizontal. It reaches a maximum height of 2.5m with a respect to the launch position. What is the initial velocity of the ball when its launched? What is the range, defined as a horizontal distance traveled until ...
January 18, 2012

COM 1001
Wait it is any form of communication that is not face to face
January 16, 2012

COM 1001
I have no idea that is what has me super stumped I have read the two chapters over and over again
January 16, 2012

COM 1001
How do the components and processes of communication apply to the electrnic/computer channel?
January 16, 2012

math
From the Periodic Table, 1 mole of aluminum weighs 27.0 g., Therefore; If 54.0 g of aluminum are placed into the beaker to react with copper(II) chloride, how many grams of the metal product will be produced?
January 12, 2012

Science
A glass window 0.50 cm thick measures 86 cm by 31 . How much heat flows through this window per minute if the inside and outside temperatures differ by 17 ? Express your answer using two significant figures. Q/t=_________kJ/min
January 9, 2012

MATH
For which value of x will the fraction 7/2x-6 be undefined? HOW TO DO THIS ?
December 30, 2011

MATH
for which value of X will the fraction 7/2x-6 be undefined ? and check this IF three times a number decreased by 5, the result is 7. find the number. 3x-5=7 and x=4 is this right?
December 25, 2011

Finance
The answer is $1,086,250
December 16, 2011

calculus
Yes, I know, but I i had question about the answer... I'm math stupid :)
December 16, 2011

calculus
Damon help again :) (last one I promise) why is X along the road sqrt2/2? ] A rancher plans to set aside a rectangular region of one square kilometer for cattle and wishes to build a wooden fence to enclose the region. Since one side of the region will run along the road, the ...
December 16, 2011

Calculus
Damon, Help :) A rancher plans to set aside a rectangular region of one square kilometer for cattle and wishes to build a wooden fence to enclose the region. Since one side of the region will run along the road, the rancher decides to use a better quality wood for that side ...
December 16, 2011

Calculus
A rancher plans to set aside a rectangular region of one square kilometer for cattle and wishes to build a wooden fence to enclose the region. Since one side of the region will run along the road, the rancher decides to use a better quality wood for that side which costs three...
December 16, 2011

Physics
false, its called the coriolis effect
December 13, 2011

physics
Two stones are thrown simultaneously, one straight upward from the base of a cliff and the other straight downward from the top of the cliff. The height of the cliff is 6.86 m. The stones are thrown with the same speed of 9.78 m/s. Find the location (above the base of the ...
December 13, 2011

physics
The velocity of a diver just before hitting the water is -11.1 m/s, where the minus sign indicates that her motion is directly downward. What is her displacement during the last 1.18 s of the dive?
December 13, 2011

physics
A drag racer, starting from rest, speeds up for 384 m with an acceleration of +19.3 m/s2. A parachute then opens, slowing the car down with an acceleration of -6.33 m/s2. How fast is the racer moving 302 m after the parachute opens?
December 13, 2011

history
Thank you .
December 12, 2011

Law
Yes it is C. Read the Land Pollution Section at: "classweb.gmu.edu/rcoffinb/Chapter%2017%20Outline.htm"
December 10, 2011

algebra
9z^2+24z+16/6z^2+5z-4
December 9, 2011

physical science
One of Saturn's moons has an orbital distance of 1.87 x 108 m. The mean orbital period of this moon is approximately 23 hours. Use this information to estimate a mass for the planet Saturn.
December 8, 2011

science
What is the ratio of the large cell volume is 64mm3 and surface is 96mm2
December 5, 2011

science-biology
biology-forums(dot)com/index.php/topic,10448.new.html#new
December 4, 2011

calculus
Correction its not 2. It's 1/72 ft lbs
December 1, 2011

calculus
The answer is 2 a = 0 (start of the spring) b = 1 integrate 4x then plug in the limits (0 and 1)
December 1, 2011

calculus
The height (in feet) attained by a rocket t seconds into flight is giving by the function h(t)= -1/3t^3 + 16t^2 + 33t + 10 When is the rocket rising? When is the rocket decreasing? when does it reach its maximum height above the ground? what is the maximum height? what is the ...
November 30, 2011

calc 2
The height (in feet) attained by a rocket t seconds into flight is giving by the function h(t)= -1/3t^3 + 16t^2 + 33t + 10 When is the rocket rising? When is the rocket decreasing? when does it reach its maximum height above the ground? what is the maximum height? what is the ...
November 30, 2011

calc
a stone is thrown striaght up from the roof of an 80 foot building. the height of the stone above the ground t seconds later is giving by the function h(t)=-16t^2 + 64t +80 during what time is the stone rising? when is the stone falling? what is the maximum upward velocity? ...
November 30, 2011

chemistry
Volume of 0.185 mol . L-1 and 0.74 M
November 28, 2011

chemistry
Air dry weight of MgNH4Po4 * 6 H2O
November 27, 2011

English
Ms. Sue, thanks for your answer. Is there a rule in grammar that I can use to convince someone that #2 is correct? Which one is correct: 1. The box contains two slides labeled "A" or "B". 2. The box contains two slides labeled "A" and "B".
November 22, 2011

english
Ms. Sue, is there a rule for this that I can use to justify your answer. I have a hard time convincing a colleague that you are correct.
November 22, 2011

english
which one is correct: 1. the box contains two slides labeled "A" or "B" 2. the box contains two slides labeled "A" and "B"
November 22, 2011

physics
A 450 kg spherical mass is placed 4.40 meters away from a 550 kg spherical mass. What is the magnitude of the gravitational field midway between the two? ...... Im not quite sure how to do this any help would be appreciated.
November 20, 2011

Chemistry
An oil whose density is 0.775g/mL was used in a open-end manometer to measure the pressure of a gas in a flask, as shown in figure (b). If the height of the oil column is 7.68cm and Pbar = 760.0mmHg. What is the pressure of the gas in the flask in mmHg?
November 18, 2011

Science
what is a dilute solution
November 14, 2011

English
Soldiers carried several days cold nations. should days chage to a possessive noun from days to days'
November 10, 2011

Algebra
Solve and simplify: x^2+14x-4=0
November 9, 2011

Algebra
Add, simplify if possible 4y/y^2-9 + y/y-3
November 9, 2011

Algebra
Solve sqrt:9x+55=x+5, Simplify and use comma to separate the answers
November 9, 2011

Chemistry
I have a compound (mx) weak acid (x- = Hx) mx in 5M strong acid solution solubility = 5x10(-3) Ksp = 1x10(-20) Find Ka... I need to know where to start
November 8, 2011

Math
Classify triangle ABC by its sides if side AB = 6x, side AC = 4x + 6 and side BC = 8x + 3. The perimeter of triangle ABC is 63. Show all your work. Explain your reasoning.
November 8, 2011

geometry
A wire 10 meters ong is to be cut into two pieces. One piece wil be shaped as a square, and the other piece will be shaped as a circle. (piece one is 4x, piece two is 10-4x) a)Express the total area A enclosed by the pieces of wire as a function of the length x of the side of...
November 7, 2011

fraction 10-1 math
3/7 are red
November 7, 2011

Physics
Michelson used a rotating eight sided mirrored "wheel" to determine speed of light. In this case the mirror is rotated at a certain frequency which allows light to travel from the source, reflect off the mirrored wheel and into the observers eyes. What is the minimum...
November 7, 2011

Social studies
What stands on a hill called acropolis in for 2500 years in Greece
November 5, 2011

geometry
In ∆RST, RS = 10, RT = 15, and m∠R = 32. In ∆UVW, UV = 12, UW = 18, and m∠U = 32. Which of the following statements is correct? 1. ∆RST ∼ ∆WUV and the similarity ratio is 56. 2. ∆RST ∼ ∆UVW and the similarity ratio is...
November 3, 2011

Physics
Find the linear speed of the bottom of a test tube in a centrifuge if the centripetal acceleration there is 5.1×104 times the acceleration of gravity. The distance from the axis of rotation to the bottom of the test tube is 7.7 .
November 3, 2011

Physics
Jill of the Jungle swings on a vine 6.4 long. What is the tension in the vine if Jill, whose mass is 59 , is moving at 3.0 when the vine is vertical?
November 3, 2011

Physics
Find the centripetal acceleration at the top of a test tube in a centrifuge, given that the top is 4.5 from the axis of rotation and that its linear speed is 76 .
November 3, 2011

Physics
Driving in your car with a constant speed of 12 , you encounter a bump in the road that has a circular cross-section, as indicated in the figure . If the radius of curvature of the bump is 35 , find the apparent weight of a 70- person in your car as you pass over the top of ...
November 3, 2011

Physics
When you take your 1000- car out for a spin, you go around a corner of radius 57 with a speed of 19 . The coefficient of static friction between the car and the road is 0.88. Assuming your car doesn't skid, what is the force exerted on it by static friction?
November 3, 2011

Physics
A 8.0×10−2- toy airplane is tied to the ceiling with a string. When the airplane's motor is started, it moves with a constant speed of 1.30 in a horizontal circle of radius 0.49 , as illustrated in the figure . Find the angle the string makes with the vertical...
November 3, 2011

Physics
On Apollo missions to the Moon, the command module orbited at an altitude of 150 above the lunar surface. How long did it take for the command module to complete one orbit?
November 3, 2011

Physics
A 6.5- bowling ball and a 7.1- bowling ball rest on a rack 0.80 apart. Part A- What is the force of gravity exerted on each of the balls by the other ball? Part B- At what separation is the force of gravity between the balls equal to 2.2×10−9 ?
November 3, 2011

Physics
A communications satellite with a mass of 400 is in a circular orbit about the Earth. The radius of the orbit is 3.7×104 as measured from the center of the Earth. Calculate the gravitational force exerted on the satellite by the Earth when it is in orbit.
November 3, 2011

History
What language was spoken/written by the venerable bede/ pre Beowulf period?
November 2, 2011

art
ddddddddddsssssssssssssfffffffffffff
November 1, 2011

ecology
what is the single most important determination of plant distribution?
November 1, 2011

Math
(-4,8);6x=7y+3 Write the equation of the line containing the given points and parallel to given line express your answer in y=mx+b form
October 30, 2011

Engineering
-From the following two linear homogeneous algebraic equations:(sqr= square root) (1) B*sin(kl/sqr2) = D*sin(kl) (2) (k/sqr2)*B*cos(kl/sqr2) = (k)*D*cos(kl) -Form matrix of these 2 equations and solving the determinant=0 will lead to: (1/sqr2)*cos(kl/sqr2)*sin(kl) - sin(kl/...
October 30, 2011

English
Thanks Ms. Sue
October 27, 2011

English
Write two examples of complex sentences, the first having the dependent clause appearring at the start, and the second with the independent clause appearing first. Write the sentences so they talk about having tacos for lunch.
October 27, 2011

Physical Science
What becomes of the electric energy provided in electrolysis? In what device is this energy transformation reversed?
October 26, 2011

physics
A 1.20- block of wood sits at the edge of a table, 0.720 above the floor. A 1.20×10−2- bullet moving horizontally with a speed of 750 embeds itself within the block. What horizontal distance does the block cover before hitting the ground?
October 26, 2011

physics
A 1.20- block of wood sits at the edge of a table, 0.720 above the floor. A 1.20×10−2- bullet moving horizontally with a speed of 750 embeds itself within the block. What horizontal distance does the block cover before hitting the ground?
October 26, 2011

physic
A 1.20-{\rm kg} block of wood sits at the edge of a table, 0.720 m above the floor. A 1.20×10−2-{\rm kg} bullet moving horizontally with a speed of 750 m/s embeds itself within the block
October 26, 2011

Math
Which has the largest perimeter, Polygon A or Polygon B? Polygon A is a square (5 cm each side) - Polygon B is 20 sided (1 cm each side).
October 25, 2011

Physics
A block is pushed across a horizontal surface with a coefficient of kinetic friction of 0.15 by applying a 150 N horizontal force. If the block accelerates at the rate of 2.53 m/s2 (squared), what is the mass of the block?
October 24, 2011

calculus
a ball is thrown upward at 96 feet per second from the top of a 100 foot building. 1.when will the ball obtain maximum height 2. when will the ball hit the ground?
October 24, 2011

physics
thats 23 degrees
October 24, 2011

physics
At the base of a frictionless icy hill that rises at 23.0m above the horizontal, a toboggan has a speed of 12.0m/s toward the hill. How high vertically above the base will it go before stopping?
October 24, 2011

algebra
N(x)= -0.4x^2 + 11.2x +10 solve for x
October 23, 2011

Chemistry
If 0.120 moles of water are produced in the reaction H+(aq)+OH-(aq)=H2O deltaH=-56.2kj/mol
October 23, 2011

Chemistry
If 0.120 moles of water are produced in the reaction H+(aq)+OH-(aq)=H2O deltaH=-56.2kj/mol
October 23, 2011

Chemistry
Delta H reaction for the following reaction: C(s)+H2O(g)=>CO(g)+H2(g)
October 23, 2011

algebra
Can anyone solve A= 1/2h(a+b) solve for h
October 23, 2011

Math
A tile is 38 cm long and the space between the tiles is 0.8. How many tiles are required to build a floor 5.82 m long?
October 19, 2011

Math
A tile is 38 cm long and the space between the tiles is 0.8. How many tiles are required to build a floor 5.82 m long?
October 19, 2011

physics
Imgaine that a cart intially moving with velocity V_0, collides with a cart at rest and then the two carts stick together. Find a equation for potential energy in this case.
October 17, 2011

chemistry
What mass of oxygen is needed for the complete combustion of 2.60×10−3 of methane? Express your answer with the appropriate units.
October 14, 2011

CHEMISTRY
What mass of water is produced from the complete combustion of 2.60×10−3 of methane? Express your answer with the appropriate units.
October 13, 2011

chemistry
What mass of carbon dioxide is produced from the complete combustion of 2.60×10−3 of methane?
October 13, 2011

social s.
another word for trail of tears
October 13, 2011

CHEMISTRY
What coefficients are needed to balance the equation for the complete combustion of methane? Enter the coefficients in the order CH4,O2,CO2, and H2O,respectively. Express your answer as four integers, separated by commas (e.g., 1,2,3,4).
October 13, 2011

chemistry
For a week acid whose ionization constant is 1.75 x 10(-5), the pH of its solution is 3.0. Determine its degree of ionization and its percent ionization.
October 13, 2011

chemistry
Write an equation for the hydrolysis of each of the following salt: i) NaCH2H3O2; ii) Na2CO3; iii) NH4Br
October 13, 2011

chemistry
Determine the mass of KHP (molar mas = 204.2 g/mol) that is required to react with 30.0 mL of 1.0 M Na0H (molar mass 40.0 g/mol)if the reaction is NaOH + KHP --> NaKP + H2O
October 13, 2011

chemistry
Account for the increase in reaction rate brought about by a catalyst.
October 13, 2011

chemistry
Explain the difference between the rate of a reaction and its rate constant.
October 13, 2011

geometry
M is the midpoint of AB. AM=5x and MB=3x+4. find x.
October 12, 2011

Chemistry
a titration experiment 20 mL solution of hydrochloric acid required 15.2mL of a .879 M barium hydroxide solution. What was the molar concentration of the HCl solution?
October 11, 2011

chemistry
The energy levels the electron can occupy in the H atom can be calculated using the energy level equation. Calculate the wavelength (nm) of the photon absorbed when the electron goes from a n= 1 energy level to a n= 3 energy level. Express answer in scientific notation. ...
October 11, 2011

Calculus
Find the indicated limits. If the limit does not exist, so state, or use the symbol + ∞ or - ∞. f(x) = { 2 - x if x ≤ 3 { -1 + 3x - x^2 if x > 3 a) lim 3+ f(x) x->3 b) lim 3- f(x) x->3 c) lim f(x) x->3 d) lim ∞ f(x) x->3 e) lim -∞ f...
October 9, 2011

algebra
Simplify each expression. Justify your steps using the Commutative, Associative and Distributive Properties when necessary 8k2 + 4k - 3k2 + 3^2 - k + 5 Please let me
October 8, 2011

algebra
write an expression that has five terms and simplifies to 5m3 + 4n. Please give me the steps
October 8, 2011

Calculus
f a rock is thrown upward on the planet Mars with a velocity of 7 m/s, its height in meters t seconds later is given by y = 7t − 1.86t^2. (Round your answers to two decimal places.) Estimate the instantaneous velocity when t = 1.
October 8, 2011

geometry
Triangle XYZ above is similar to triangle UVW (not shown). If the length of one side of triangle UVW is 60, then what is one possible perimeter of triangle UVW
October 7, 2011

Math
Would it be plausible for Car B to catch Car A within .5 mile?
October 6, 2011

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