Thursday
October 2, 2014

Posts by John


Total # Posts: 6,264

Math Sums and Differences
a 8 b -7 c -7 d 11 e 3 f 35 a -7, -10, -13 b 5, 9, 13
February 8, 2014

physics
Q. A 200 kg load is suspended by a cable from a crane . Two ropes are attached to the load , acting at 90 deg to each other. One rope exerts a pull of 220 N , at 10 deg below horizontal, the other rope exerts a force of 360 N at 15 deg below horizontal. Calculate 1)tension in ...
February 7, 2014

Math
Harry Styles wants to make trail mix made up of almonds, walnuts, and raisins. He wants to mix one part almonds, two parts walnuts and, three parts raisins. Almonds cost $12 per pound, walnuts cost $9 per pound and, raisins cost $5 per pound. He has $15 to spend on the trail ...
February 6, 2014

Physics
If you can throw a stone straight up to a height of 18m, how far could you throw it horizontally over level ground? Assume the same throwing speed and optimum launch angle.
February 5, 2014

physics
Find the length of a simple pendulum that has a period of 5.00s . Assume g = 9.81 m/s2. Express your answer to three significant figures and include the appropriate units.
February 5, 2014

algebra
The questions is like this: sqr(2) + sqr(1), and the asnwer is 1 + sqr(2), or in decimal form: 2.4142
February 5, 2014

Language Arts ~CHECK MY WORK PLEASE~
Ok, now I can answer your last questions. The last one is right! good job
February 5, 2014

Trigonometry
Thank you very much; but these are the only answers! I don't know why, but I'll try to check with my teacher. Again, thanks for the help and showing your work, you're awesome!
February 5, 2014

Trigonometry
If a ship leaves port at 9:00 a.m. and sails due north for 3 hours at 12 knots, then turns N 30° E for another hour, how far from port is the ship? A. 45 nm B. 47 nm C. 51 nm D. 53 nm
February 5, 2014

Trigonometry
Wel, I'm not sure, I have two other questions with practically the same things, please take a look! If a ship leaves port at 9:00 a.m. and sails due east for 3 hours at 10 knots, then turns N 60° E for another hour, how far from port is the ship? A. 35 nm B. 39 nm C. ...
February 5, 2014

Trigonometry
If a ship leaves port at 9:00 a.m. and sails due south for 3 hours at 14 knots, then turns N 60° E for another 2 hours, how far from port is the ship? A. 14 nm B. 17.75 nm C. 21.5 nm D. 22.6 nm PLEASE HELP!
February 5, 2014

Writing Evaluation (Writeacher!)
This is really good. Just a few points- One, African american woman DO NOT earn less than white women "to this day", that is prejudiced as well as bias, and is illegal in the U.S. and many other countries. You might want to take that part off. Otherwise, good job!
February 5, 2014

physics
An object (with charge -4.2 µC and mass 0.024 kg) hovers at rest above the ground, its weight being held up by a uniform electric field.(a) Find the size and direction of this electric field.(b) If the electric charge on the object is quadrupled while its mass remains ...
February 4, 2014

physics
An object (with charge -4.2 µC and mass 0.024 kg) hovers at rest above the ground, its weight being held up by a uniform electric field.(a) Find the size and direction of this electric field.(b) If the electric charge on the object is quadrupled while its mass remains ...
February 4, 2014

math
laura favorite clothes are five sweater, four skirts, three jackets, two pairs of shoes and one belt. how many ways can laura wear her favorite clothes without repeating the exact outfit
February 4, 2014

math
a drinking glass 5 inches tall has a 2.5 inch diameter base. its sides slope upward at a 4 degree angle. what is the diameter of the top of the glass?
February 3, 2014

Chem.
How many milliliters of water has been dispensed if the initial buret reading was 0.38 ml and the final is 24.70 ml?
February 3, 2014

Help!!!
Thanks Emily i got a 100 % too
February 3, 2014

math
Draw different rectangles with the perimeter of 12 units
February 3, 2014

Math
2. Assuming your weekly gross earnings are $525, calculate your withholding tax using the wage bracket method and the percentage method.
February 3, 2014

Finite
Assume that there are 18 board members: 12 females, and 6 males including Larry. There are 4 tasks to be assigned. Note that assigning the same people different tasks constitutes a different assignment.
February 3, 2014

Physic II
A flat disk 1.0 m in diameter is oriented so that the plane of the disk makes an angle of π/6 radians with a uniform electric field. If the field strength is 491.0 N/C, find the electric flux through the surface. Please show step by step
February 2, 2014

Physics
1. If the angle of the boat is 150 degrees, v' = 3 m/s, and v0 = 3.0 m/s, how far do you drift downstream before you arrive at the other side of the river? (HINT: read the x axis.) 2. If the river flow rate (v0) = 3.0 m/s, and the angle (è, or “theta”) is ...
February 1, 2014

physics
8.31 m/s^2
February 1, 2014

Calculus
Find an equation of the plane. The plane that passes through the point (−1, 2, 1)and contains the line of intersection of the planes x + y − z = 4 and 4x − y + 5z = 4
January 31, 2014

Math
A rectangular yard measuring 30ft by 35ft is bordered (and surrounded) by a fence. Inside, a walk that is 4ft wide goes all the way along the fence. Find the area of this walk
January 30, 2014

Physic II
Two like charges of the same magnitude are 8.0 mm apart. if the force of repulsion they exert upon each other is 4.0 N, what is the magnitude of each charge? (The constant of proportional for the Coulombic force is 9.0 x 10^9 N.m^2/C^2 ) Please show all work.
January 26, 2014

Geometry/Algebra/Calculus
Why isn't the surface area of a sphere with radius r the following: 2*pi * (pi*r) That comes from the following flow of logic: Doesn't it makes sense to think of the surface area of the sphere with radius r as the the circumference of the semi-circle with radius r, pi*...
January 26, 2014

Algebra
Thanks Reiny
January 25, 2014

Algebra
A couple wishes to rent a car for one day while on vacation. Ford Auto Rental wants $35.00 per day and 14¢ per mile, while Chevrolet-For-A-Day wants $34.00 per day and 16¢ per mile. After how many miles would the price to rent the Chevrolet exceed the price to rent a...
January 25, 2014

health
the national weigth control registry found that those wno maintain aweigth loss reported improvememt in what
January 25, 2014

Maths
How many litres of water in a tank size 1.3m wide, 3.76m long and 0.73m deep
January 24, 2014

math
The side length, d, of a cube that contains a sphere depends on the radius, r, of a sphere. Assuming that the faces of the cube are tangent to the sphere, write the volume of the cube as a function of the radius of the sphere.
January 24, 2014

Physics
so 81.34?
January 21, 2014

Physics
A rock is dropped from rest. How fast is it going after it has been falling for 8.3 s?
January 21, 2014

physics
A boy standing on top of a building throws a small ball from a height of H1 = 43.0 m. The ball leaves with a speed of 14.9 m/s, at an angle of 55.0 degrees from the horizontal, and lands on a building with a height of H2 = 14.0 m. Calculate for how long the ball is in the air...
January 21, 2014

physics
A fireman, 29.1 m away from a burning building, directs a stream of water from a ground level fire hose at an angle of 48.5° above the horizontal. If the speed is 51.6 m/s, at what height will the stream of water hit the building?
January 21, 2014

Physics
The figure shows a 7 kg block being pulled along a frictionless floor by a cord that applies a force of constant magnitude 20 N but with an angle θ(t) that varies with time. When angle θ = 29°, at what rate is the block's acceleration changing if (a)θ(t...
January 21, 2014

Physics
A 33.4 kg child, with a 3.05 kg backpack on his back, first stands on a sidewalk and then jumps up into the air. Find the force (positive up/negative down) on the sidewalk from the child when the child is (a) standing still and (b) in the air. Now find the net force (positive ...
January 21, 2014

Physics
If a current is flowing with a value of 5.9 A, how much electron charge passes any single point in 25 seconds? A) 1.9 x 1020 e
January 21, 2014

Physics
Suppose that a binary star system consists of two stars of equal mass. They are observed to be separated by 380 million kilometers and take 9.0 Earth years to orbit about a point midway between them. What is the mass of each? ------------------------------- I've worked ...
January 19, 2014

Physics
DISTANCE D = 2 * (# of laps) * (length of pool) D = 2*69*35 = 4830 m TOTAL DISPLACEMENT You're going by the swimmer's final position, so if he ends up at the same place he started, the net distance (or in other words, the displacement) is 0. AVERAGE VELOCITY ...
January 19, 2014

Algebra
A boat can go 20 miles against a current in the same times that it can go 60 miles with the current. The current is 4 miles per hour. Find the speed of the boat with no current.
January 14, 2014

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

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