Friday
August 29, 2014

Posts by John


Total # Posts: 6,208

Physics Classical Mechanics Help ASAP
if i make a simple conversion from PE to KE an then velocity it gives me a red cross :( but i don see ho to fit the bigger block into thepicture
January 10, 2014

Physics
Estimate the force a person must exert on a string attached to a 0.200 kg ball to make the ball revolve in a circle when the length of the string is 0.600 m. The ball makes 1.40 revolutions per second. Do not ignore the weight of the ball. In particular, find the magnitude of ...
January 8, 2014

PRE-CAL
That's all the problem says
January 8, 2014

PRE-CAL
A rectangle is inscribed in a right triangle with legs of length 3 and 4. Express the area A of the rectangle as a function of x.
January 8, 2014

Math
P and Q are two towns.The bearing of Q from P is 070 degrees.What is the bearing of P from Q?
January 6, 2014

Math
We call a natural number "odd looking" if all its digits are odd.How many 4-digit odd looking numbers are there?
January 2, 2014

Physics
A car with a mass of 1264 kg is coasting in neutral on a straight,level road. It slows down, and its speed as a function of time is given by the equation: v(t) = a − bt + ct2 Constant Value Units a 26.8 m/s b 0.310 m/s2 c 2.10*10^-3 m/s2 At a time of 36.0 s the speed, as...
January 2, 2014

Physics
the equation: v(t) = a − bt + ct2
January 2, 2014

Physics
A car with a mass of 1264 kg is coasting in neutral on a straight,level road. It slows down, and its speed as a function of time is given by the equation: Constant Value Units a 26.8 m/s b 0.310 m/s2 c 2.10·10-3 m/s2 At a time of 36.0 s the speed, as given by the above ...
January 2, 2014

Physics - please help!!
A 395.0 g block is dropped onto a vertical spring with a spring constant k = 252.0 N/m. The block becomes attached to the spring, and the spring compresses 0.29 m before momentarily stopping. While the spring is being compressed, what work is done by the block's weight? ...
December 30, 2013

Physics
A 395.0 g block is dropped onto a vertical spring with a spring constant k = 252.0 N/m. The block becomes attached to the spring, and the spring compresses 0.29 m before momentarily stopping. While the spring is being compressed, what work is done by the block's weight? ...
December 29, 2013

Math
So would the answer be 6 or 3 then
December 27, 2013

Math
A line has y-intercept (0, 3) and is perpendicular to the line 2x + y = 3. Find the x-intercept of the line.
December 27, 2013

Math
Find the distance from the point (2, 3) to the line x − y = 5.
December 27, 2013

Math
f(x)=13x^2 -15x-14 g(x)=15x^3+14x^2-15x+12 find f(3) × f(10) + f(-7) × g(9)
December 27, 2013

Science
as do i
December 27, 2013

Math
one day?
December 27, 2013

Science
If Changing conditions lead to the decreased ocygen levels in the stream the carrying capacity of the stream for the trout will decreace oxygen levels in water is therefore a ________ with respect to the number of trout that a particular stream can support. Fill in the blank ...
December 27, 2013

Science
i dont know that one i just guesed lol can u help me with this one If Changing conditions lead to the decreased ocygen levels in the stream the carrying capacity of the stream for the trout will decreace oxygen levels in water is therefore a ________ with respect to the number...
December 27, 2013

Science
Please Help ME Plz
December 27, 2013

Science
If Changing conditions lead to the decreased ocygen levels in the stream the carrying capacity of the stream for the trout will decreace oxygen levels in water is therefore a ________ with respect to the number of trout that a particular stream can support. Fill in the blank ...
December 27, 2013

Science
thats what i said (in a 7th grade science test in conexus) lol
December 27, 2013

Science
I Hope Thanks for the help
December 27, 2013

Science
disturbance of an ecosystem by human activity often has negative effects on the number of species which is a measure of its ___________.?
December 27, 2013

Physics
415
December 26, 2013

Physics
A block of mass m = 5.2 kg is released from rest at a height of H = 4.0 m on a curved frictionless ramp. At the foot of the ramp is a spring whose spring constant is k = 192.0 N/m. What is the maximum compression of the spring, x? After the spring reaches its maximum ...
December 25, 2013

Algebra 11th
Activity 1: Graphing To fill an order for Sizzlin' Sauce sauces, you bought 1050 green peppers and 1200 hot chili peppers. • Write and graph a system of inequalities to represent how many pints of each kind of sauce you can make. Use the recipes below. • Select ...
December 25, 2013

math
He earned $300 which equals 6% Divide $300 by 6 to get 1% $50 is 1% , then multiply $50 by 100 to get 100% sales Answer $5000 in sales
December 24, 2013

4th grade math
that super easy just do 12*365+3=4383
December 19, 2013

science help!!!!
Disturbance of an ecosystem by human activity often has negative effects on the number of species, which is a measure of its __________________.
December 17, 2013

science
If changing conditions lead to decreased oxygen levels in the stream, the carrying capacity of the stream for the trout will decrease. Oxygen level in water is therefore a(n) _____________ with respect to the number of trout that a particular stream can support
December 17, 2013

science
i need the same help
December 16, 2013

physics
When the net force that acts on a hockey puck is 12 N, the puck accelerates at a rate of 48 m/s2. Determine the mass of the puck.
December 12, 2013

seince
According to the principle of supply and demand, the price you pay for a product is determined both by its availability and by consumer demand for the product. On the basis of this principle, which minerals do you think a higher value, iron-containing minerals or feldsparS? ...
December 11, 2013

science urgent need help
What is the independent variable? Select one option from the list below. 1 is the correct answer help me please .thanks Sue is setting up an experiment to test whether fly maggots select a dark or a brightly lit environment. She sets up a chamber in which there is a gradient ...
December 11, 2013

Science need help
What is the independent variable? 1 is that the correct answer help plz Sue is setting up an experiment to test whether fly maggots select a dark or a brightly lit environment. She sets up a chamber in which there is a gradient in light intensity from one end (dark) to the ...
December 11, 2013

science help plzzzzzzzzzzzzzzz?
but its different then the other this one independent variable
December 11, 2013

science help plzzzzzzzzzzzzzzz?
Sue is setting up an experiment to test whether fly maggots select a dark or a brightly lit environment. She sets up a chamber in which there is a gradient in light intensity from one end (dark) to the other (brightly lit). The experimental hypothesis was “There will be a...
December 11, 2013

Science need help
Sue is setting up an experiment to test whether fly maggots select a dark or a brightly lit environment. She sets up a chamber in which there is a gradient in light intensity from one end (dark) to the other (brightly lit). The experimental hypothesis was “There will be a...
December 10, 2013

Math- urgent
2x = 28 x = 14
December 10, 2013

calculus
the tangent line to the curve y=x^2 at the point (a,a^2) passes through the point (2,1) find all possible values of a. Thank you so much!!
December 9, 2013

science
Thank you!!!
December 9, 2013

science
How is biodiversity related to human activities that use natural resources? A.biodiversity decreases as humans use natural resources wisely B.biodiversity decreases as humans limit there use of natural resources C.biodiversity increases as humans deplete natural resources D....
December 9, 2013

science
answers are all wrong the right ones are these: A.there will be fewer renewable resources B.more humans will populate the earth C.biodiversity naturally reduces over time D.more humans will recycle materials
December 9, 2013

science
which one help!!
December 9, 2013

science
which of the following will make it harder in the future to develop sustainable methods for humans using resources? A.biodiversity decreases as humans use natural resources wisely B.biodiversity decreases as humans limit there use of natural resources C.biodiversity increases ...
December 9, 2013

science
Is D right?
December 9, 2013

science
Ok thanks!!
December 9, 2013

science
Complete the following sentence with the best phrase below. Removing just one species from an ecosystem: A.would have no effect, because it is just one species of many B.would have little effect, unless it was a keystone species C.would have a negative effect, unless it was an...
December 9, 2013

science
I did! I am confused! Help! Please!
December 9, 2013

science
I dont know the answer help!
December 9, 2013

science
D?
December 9, 2013

science
Which of the following could help reduce loss of biodiversity? A. increasing construction of tall buildings B. increasing farming operations C. increasing conservation measures. D. increasing the human ecological footprint
December 9, 2013

science
I think it is C. Am I correct?
December 9, 2013

science
Help!
December 9, 2013

science
Which one?
December 9, 2013

science
which of the following pairs of terms could be used to describe a bullfrog that is active at night and enters a state of complete inactivity during cold months? A. cooperation and hibernation B. aggression and circadian rhythm C.circadian rhythm and hibernation D. courtship ...
December 9, 2013

STATISTICS HELP
A student wishes to test the accuracy of the measuring jug she is using in an experiment. The label on the jug claims that it measures volume to an accuracy of plus or minus 5 cm3. The density of water is about 0.999 g cm−3, which means that 100 cm3 of water should have ...
December 9, 2013

Advanced Functions/Precalculus
1. The expression sinπ is equal to 0, while the expression 1/cscπ is undefined. Why is sinø=1/cscø still an identity? 2. Prove cos(ø + π/2)= - sin ø
December 6, 2013

science
can you provide the choices ????
December 6, 2013

Chemistry
An aqueous solution containing 17.1 g of an unknown molecular compound ( nonelectrolyte) in 105.0g of water was found to have a freezing point of -1.8 degrees Celsius. What is the molar mass of the unknown compound?
December 6, 2013

Advanced Functions/Precalculus
Trigonometry Questions 1. Using a compound angle formula, demonstrate that sin2π/3 is equivalent to sin π/3 2. The expression sinπ is equal to zero, while the expression 1/cscπ is undefined. Why is the identity sin(theta)=1/csc(theta) still an identity? 3. ...
December 5, 2013

first year chem
There are two naturally occurring isotopes of chlorine with ratios of 76% and 24%. One mole of PCl3 is made using a sample of isotopically pure chlorine gas (containing only one of the two isotopes). The product weighs 142 g. If chlorine gas containing the other isotope were ...
December 5, 2013

Advanced Functions/Precalculus
Trigonometry Questions 1. Using a compound angle formula, demonstrate that sin2π/3 is equivalent to sin π/3 2. The expression sinπ is equal to zero, while the expression 1/cscπ is undefined. Why is the identity sin(theta)=1/csc(theta) still an identity? 3. ...
December 5, 2013

Advanced Functions/Precalculus
thanks! i forgot to include the exponent. I re-typed them here: 2. Solve the equation 7sin^2x-4sin2x/cosx=-1 where 0≤x≤2π 3. Determine the exact value of cos2(theta) when tan(theta)=3/4 and π<theta<3π/2 4. The average number of customers, c, at...
December 4, 2013

Advanced Functions/Precalculus
Trigonometry Questions 1. Solve the equation sin2x+1=-2sinx for 0≤x≤2π 2. Solve the equation 7sin2x-4sin2x/cosx=-1 where 0≤x≤2π 3. Determine the exact value of cos2(theta) when tan(theta)=3/4 and π<theta<3π/2 4. The average ...
December 4, 2013

Advanced Functions/Precalculus
Trigonometry Questions 1.) Find the exaqct value of tan(11π/12) 2.) A linear trig equation involving cosx has a solution of π/6. Name three other possible solutions 3) Solve 10cosx=-7 where 0≤x≤2π
December 4, 2013

Geometry
How is the size of a TV measured? If we are comparing a 15-inch TV and a 30-inch TV, what is twice as big about the bigger TV?
December 4, 2013

math
Mrs. Smith had 1/2 of a pumpkin pie left over. She split the leftover pie evenly between her 3 children. What fraction of pie did each child get?
December 3, 2013

Geometry
To determine the relationship between miles and kilometers, if we use the conversion 39.37 inches= 1 meter, we find that 1 kilometer is approximately equal to 0.62 mile. What if we use the conversion 2.54 centimeters = 1 inch? How far apart are the answers (1 kilometer = x ...
December 3, 2013

physics
A child and sled with a combined mass of 53.0 kg slide down a frictionless hill that is 7.63 m high. If the sled starts from rest, what is its speed at the bottom of the hill?
December 2, 2013

AP Physics
A 67.0 kg diver steps off a diving board and drops straight down into the water. The water provides an upward average net force 1480 N. If the diver comes to rest 4.7 m below the water's surface, what is the total distance between the diving board and the diver's ...
December 2, 2013

AP Physics
A 67.0 kg diver steps off a diving board and drops straight down into the water. The water provides an upward average net force 1480 N. If the diver comes to rest 4.7 m below the water's surface, what is the total distance between the diving board and the diver's ...
December 2, 2013

Physics Classical Mechanics
anyone solved this ?????
November 27, 2013

Algebra
For the integers from 1 to 1000, how many multiples of 9 are also multiples of 6?
November 26, 2013

physics
A monatomic ideal gas is thermally insulated, so no heat can flow between it and its surroundings. Is it possible for the temperature of the gas to rise? If the temperature can rise, how does it rise?
November 25, 2013

math
For the integers from 1 to 1000, how many multiples of 9 are also multiples of 6?
November 25, 2013

communicate
consider an artifact that is prominently displayed by a friend or co-worker - either at home or in some other space. In 1-2 paragraphs, explain how this artifact has influenced your interpretation of this person's identity. Is your perception more positive or negative ...
November 25, 2013

Calculus
An observer stands at a point P, one unit away from a track. Two runners start at the point S in the figure and run along the track. One runner runs 2 times as fast as the other. Find the maximum value of the observer's angle of sight è between the runners. Thank ...
November 23, 2013

Solar Energy
Formula in first question: a)Pmpp < Voc X Isc Formula in second question: Load resistance = Vmpp/Impp
November 23, 2013

Solar Energy
With respect to a PV module's I-V and P-V curves, and the module's operating point, consider the following statements: a) When the operating point of the PV module is on the MPP (maximum power point), \(P_{mpp} \lt V_{oc} \times I_{sc} \) b) For a given Irradiance and ...
November 23, 2013

Math
Thanks Ms. Sue!
November 19, 2013

Math
What is the smallest positive composite integer?
November 19, 2013

Comm 215
Do these look correct? Part I: True or False 1. The following word group is a FRAGMENT: That movie, one of my favorites. _X_True __False 2. The following word group is a FRAGMENT: The local baseball team, needing a good pitcher most of all. _X_True __False 3. The following ...
November 19, 2013

math
how can you use the product of 12 x 6 to find the product of 12 x 12 ?
November 18, 2013

chemistry
A mixture of NaCN and NaHSO4 consists of a total of 0.60 mol. when the mixture is dissolved in 1.0 L of water and comes to equilibrium the pH is found to be 9.9. Find the amount of NaCN in the mixture.
November 18, 2013

math
Find recursive and explicit formula for -40 -36 -32 -28
November 18, 2013

Liquid capacity of pitcher
1 quart
November 17, 2013

Science
A pelican flying along a horizontal path drops a fish from a height of 125 m while traveling 40 m/s. How far does the fish travel horizontally before it hits the water below?
November 17, 2013

Statistics
this makes no sense, u said which would be inferential and which would be inferential
November 16, 2013

science
Chemistry Hey guys, i have a question about how to figure out how much mass of a compound i need to find 130ppm here is the question. What mass of Fe(NH4)2(SO4)2*6H2O is required to prepare 2.25 L of a 130 ppm iron solution? Now i know that ppm is (mg of desired compound)/(kg ...
November 16, 2013

Chemistry ppm
Oh okay, I understand. Wow thanks alot.
November 16, 2013

Chemistry ppm
Hey guys, i have a question about how to figure out how much mass of a compound i need to find 130ppm here is the question. What mass of Fe(NH4)2(SO4)2*6H2O is required to prepare 2.25 L of a 130 ppm iron solution? Now i know that ppm is (mg of desired compoun)/(kg of solvent ...
November 16, 2013

chemistry
OH is correct haha sorry i read that wrong um well C is incorrect same as D, B is incorrect because if the constituent is the first number than you wouldnt use the number 1 plus its a methyl as the first carbon making it decane and then A is the only correct one for reasons ...
November 16, 2013

chemistry
4,5-dimethylpentane is incorrect, not only is it not using the lowest constituents numbers in the name I.E. using 1,2 instead of 4,5 it is impossible to have a methyl constituent on the first or last carbon because that would just mean the compound is not a pentane but in fact...
November 16, 2013

Math
Well W = 3 L = (2W)-5 = (6) - 5 = 1 so W + W + L + L = perimeter so 2W + 2L = perimeter so subbing 2W-5 in for L we get 2W + 2(2W-5) = perimeter = 2W + 4W-10 = perimeter = 6W - 10 = perimeter = 6(3) - 10 = perimeter =18 - 10 = perimeter = 8 = perimeter or solving the other way...
November 16, 2013

Chemistry
i dnt see any relevant equations, i dont know how u expect someone to help you also is strain a spring constant? too much information is lacking
November 16, 2013

physics
A 160 kg child jumps at 7 m/s into a boat floating a rest. After the jump, they both move at 3 m/s forward. Find the boat's mass.
November 14, 2013

phyics
A glass bottle of soda is sealed with a screw cap. The absolute pressure of the carbon dioxide inside the bottle is 1.60 x 105 Pa. Assuming that the top and bottom surfaces of the cap each have an area of 3.60 x 10-4 m2, obtain the magnitude of the force that the screw thread ...
November 12, 2013

English
also mood coward
November 9, 2013

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