Thursday
October 27, 2016

# Posts by Tim

Total # Posts: 1,399

social problems
patriarchy
February 12, 2015

math
A farmer wants to fence a small rectangular yard next to a barn. Fence for side parallel to the barn will cost 75 per foot and the fence for the other two sides will cost 30 per foot. The farmer has a total of 1750 dollars to spend on the project. Find the dimensions for the ...
February 12, 2015

Physics
a BALL IS THROWN UPWARD WITH AN INITIAL VELOCITY OF 9.8 M/S FROM THE TOP OF A BUILDING. FILL A TABLE BELOW SHOWING THE BALLS POSITION,VELOCITY, and ACCELERATION AT THE END OF EACH OF THE 1ST 4SEC OF MOTION TIME(s) POSITION(M) VELOCITY(M/S) 1 2 3 4 Acceleration (M?S^2) Fill in ...
February 11, 2015

Physics
During a rElay race along a straight ROAD the 1st runner on a three person team runs D1 with a constant velocity v1. The runner then hands off the baton to the sEcond runner who runs d2 with a constant vElocity v2. The batton is then passed to the 3rd runner who completes the ...
February 11, 2015

Physics
For a science fair competition, a group of High School students built a kicker-machine that can launch a golf ball from the origin with a velocity of 12.9 m/s and initial angle of 31.7° with respect to the horizontal. a) Where will the golf ball fall back to the ground? ...
January 27, 2015

language arts
No, it is still CBC.
January 6, 2015

World history
i don't understand what you mean
January 2, 2015

World history
I need help on a artistic response to the contemporary world im not creative i need help please im thinking to do one on war or violence
January 2, 2015

Just out of curiosity
So I believe you're American. Am I right?
December 14, 2014

Just out of curiosity
Oh that's nice of you guys! (: So who is the founder of this site? Are tutors here American?
December 14, 2014

Just out of curiosity
Are the teachers here getting paid to help the students? Is this a paid program?
December 14, 2014

Chemistry
1) A 0.1375-g sample of solid magnesium is burned in a constant-volume bomb calorimeter that has a heat capacity of 3024 J/C. The temperature increases by 1.126 degrees C. Calculate the heat given off by the burning Mg, in kJ/g and kJ/mol. 2) Determine the amount of heat in kJ...
November 18, 2014

Chemistry
1) Determine the amount of heat in kJ given off when 1.26 x 10^4 g of NO2 are produced according to the equation: 2NO (g) + O2 (g) --> 2NO2 (g) and delta (H) = 483.6 kJ/mol 2) A sheet of gold weighing 10 g and at a temperature of 18 degrees C is placed on a flat sheet of ...
November 18, 2014

physics
What is the kinetic energy in MeV of a π–meson that lives 1.80×10-16 s as measured in the laboratory, and 0.840×10-16 s when at rest relative to an observer, given that its rest energy is 135 MeV?
November 16, 2014

Maths
4. Tonya is 1.3 meters tall. She stands 7 meters in front of a tree and casts a shadow 1.8 meters long. How tall is the tree?
November 12, 2014

math
a box of chalk and 2 staplers costs $10. 3 boxes of chalk and 2 staplers costs$18. find total cost of 1 box of chalk and 1 stapler
October 30, 2014

precalculus
one section of a suspension bridge has its weight uniformly distributed between twin towers that are 400 feet apart and rise 90 feet above the horizontal roadway. a cable strung between the tops of the towers has the shape of a parabola, and its center point is 10 feet above ...
October 25, 2014

Physics
as you are riding in a 1650-kg car, you approach a hairpin curve in the road whose radius is 50m. the roadbed is banked inward at anangle of 10 degrees. suppose that the road is dry and that the static friction coefficient between the tires and the asphalt road is .6 what is ...
October 24, 2014

inequalities
5(2x-4)+ 11< 10 -2(6-x)
October 21, 2014

Math
If z^2 = x^2 + y^2 with z>0, dx/dt=3, and dy/dt=6, find dz/dt when x=4 and y=3. Answer: \displaystyle \frac{dz}{dt} =
October 20, 2014

Calculus
At noon, ship A is 40 nautical miles due west of ship B. Ship A is sailing west at 19 knots and ship B is sailing north at 16 knots. How fast (in knots) is the distance between the ships changing at 7 PM?
October 20, 2014

Chem---DrBob222
What is the formula for 2-bromomethylpropane ?
October 14, 2014

Physics
A highway curve with a radius of 750 m is banked properly for a car traveling 100 km/h. If a 1600- kg Porshe 928S rounds the curve at 220 km/h, how much sideways force must the tires exert against the road if the car does not skid?
October 10, 2014

Physics
Use kinematic equations,velocity at max height is zero, so 0=9.75^2-19.6(X-399)=403.9m. Then for speed at ground just do V^2=-19.6(0-403)=88.9 m/s
October 10, 2014

1) A high-speed maglev train is traveling with a changing velocity. what can be said about the forces acting on the train? 2) An automated vehicle in a warehouse is traveling at a constant velocity. what can be said about the forces acting on the vehicle?
October 1, 2014

math
out of 32 students in a class, 5 said they rode their bikes to school. Based on these results, how many of the 800 students ride their bikes to school?
September 28, 2014

English
Thank you SO MUCH.
September 24, 2014

English
Which would be grammatically correct: We both had a goal and objective in mind to get our jobs done. or We both had a goal and objective in mind to get the job done. Thanks!
September 24, 2014

Algebra Based - Physics Help Please!!!!
a) In 1897, Madeline Boardman won the long-drive contest during the U.S. Women's Amateur Golf Tournament. Her winning drive was 125 m. if the ball was hit off the tee at a 45 degree angle, what did the magnitude of its initial velocity have to be for her to make the ...
September 24, 2014

Physics - Force
A high-speed maglev train is traveling with a changing velocity. what can be said about the forces acting on the train? Thanks!
September 24, 2014

physics
If a pull of 350 N accelerates a 38-kg child on ice skates at a rate of 7.3 \frac{m}{s^2}, what is the frictional force acting on the skate?
September 15, 2014

a) On the Acme W&W company production line, parts have to be transported 100 m by conveyor belt to a machine area. The parts move at a constant speed of 2.5 m/s. How much time does it take to move a part 100 m? b) On the same conveyor belt as described in problem a), the part ...
September 11, 2014

Physics Help
a) On the Acme W&W company production line, parts have to be transported 100 m by conveyor belt to a machine area. The parts move at a constant speed of 2.5 m/s. How much time does it take to move a part 100 m? On the same conveyor belt as described in problem a), the part ...
September 11, 2014

Physics Help
On the Acme W&W company production line, parts have to be transported 100 m by conveyor belt to a machine area. The parts move at a constant speed of 2.5 m/s. How much time does it take to move a part 100 m? Show steps please! Thank you!
September 11, 2014

Thank you to all that helped
September 2, 2014

Can someone please show me how to work this problem below? Jacob earned $80 babysitting and deposited the money into his savings account. The next week he sepnt$85 on video games. Use the integers to describe the weekly changes in Jacob's saving account balance.
September 2, 2014

Statics
If both the projection Pa and component Fb of the force F are 305 N, determine the magnitude F and the orientation è of the b-axis. The angle between the negative y axis and the a- axis is 70 degrees. The angle between the negative y axis and the force F is 108 degrees...
September 1, 2014

Statics
The figure shown includes an x, y, and z axis. On the positive x-y plane, force F2 points toward the origin with a magnitude of 3kN and an angle theta between it and the positive x axis. On the negative x-y plane, force F1 points toward the origin with an angle of 27 degrees ...
September 1, 2014

Statics
The two forces shown act in the x-y plane of the T-beam cross section. If it is known that the resultant R of the two forces has a magnitude of 3.8 kN and a line of action that lies 14° above the negative x-axis, determine the magnitude of F1 and the orientation è ...
September 1, 2014

Statics
If both the projection Pa and component Fb of the force F are 305 N, determine the magnitude F and the orientation è of the b-axis. There is a 70 degree angle from the negative y-axis to the a-axis. There is a 108 degree angle from the negative y-axis to the force.
September 1, 2014

Physics
Determine the magnitude of the vector sum V=V1+V2 and the angle theta(x) which V makes counterclockwise from the positive x-axis. V1 = 34 units and makes a 20 degree angle with the +x axis V2 = 28 units and forms a 3,4,5 triangle with the -x axis
August 27, 2014

Physics
Determine the magnitude of the vector sum V=V1+V2 and the angle theta(x) which V makes counterclockwise from the positive x-axis. V1 = 34 units and makes a 20 degree angle with the +x axis V2 = 28 units and forms a 3,4,5 triangle with the -x axis
August 26, 2014

biology
Also the transmembrane protein functions as an ion and solute channel.
August 21, 2014

biology
You want to design an experiment to test if a bacteria affects a transmembrane protein. What types of controls should you use to eliminate effects of confounding variables?
August 21, 2014

ALGEBRA
A JAR CONTAINING 3 RED 4 BLUE AND 5 WHITE MARBLES WHATS THE CHANCE OF DRAWING FIRST A RED AND THEN WITHOUT REPLACEMENT A WHITE MARBLE?
August 21, 2014

math
thank you
August 11, 2014

math
How to write it in expanded form 12.0067 Is this answer right 1*10+2*1+6*1/1000+7*1/10000
August 11, 2014

math
How to write it in expanded form 12.0067 Is this answer right 1*10+2*1+6*1/1000+7*1/10000
August 11, 2014

math
How to write it in expanded form 12.0067
August 11, 2014

Math
Find an equation of the curve that satisfies the given conditions: (d^2y/dx^2)=6x, the line y=5-3x is tangent to the curve at x=1
July 29, 2014

Math
Suppose you own a tour bus and you book groups of 20 to 70 people for a day tour. the cost per person is $30 minus$0.25 for every ticket sold. Gas and other miscellaneous costs are $200. Part a) Write the revenue and cost functions for this situation Part b)Write the profit ... July 29, 2014 Calculus A container in the form of a right circular cone (vertex down) has a radius of 4m and height of 16m. If water is poured into the container at the constant rate of 16m^3/min, how fast is the water level rising when the water is 8m deep. V=(pi/3)(r^2)h July 27, 2014 calculus ddx(sin(x3)+(sin(x))3) =ddx(sin(x3))+ddx((sin(x))3) =3⋅(sin(x))2⋅ddx(sin(x))+cos(x3)⋅ddx(x3) =3x2⋅cos(x3)+3⋅cos(x)⋅(sin(x))2 July 17, 2014 Math A container in the form of a right circular cone (vertex down) has a radius of 4m and height of 16m. If water is poured into the container at the constant rate of 16m^3/min, how fast is the water level rising when the water is 8m deep? V=(pi/)(r^2)h July 17, 2014 Chemistry For each of the following examples, decide whether it would be better to use the term molecule or formula unit. a. K2SO3 b. H2SO3 c. CCl4 d. NH4Cl June 5, 2014 Chemistry Complete and balance the reactions A) (CH3)2NH(aq)+CH3COOH(aq)→ B) CH3CH2NH2(aq)+HBr(aq)→ C) CH3NH2(aq)+HCOOH(aq)→ June 3, 2014 Physics A 275-gram ball bounces off a wall. The ball stays in a horizontal plane throughout the motion. The ball strikes the wall with a speed of 4.50 m/s at an angle of 𝜃 = 35.0o relative to the wall and rebounds with the same speed at the same angle. If the ball is in ... May 27, 2014 geometry there exists a circle with chords. the chords are congruent. their corresponding arc measurements are 80 degrees and 2x+10 solve for x May 21, 2014 algebra 5(2x-4)+ 11< 10 -2(6-x) May 20, 2014 Chemistry Free-energy change, ΔG∘, is related to cell potential, E∘, by the equation ΔG∘=−nFE∘ where n is the number of moles of electrons transferred and F=96,500C/(mol e−) is the Faraday constant. When E∘ is measured in volts, Δ... May 18, 2014 Chemistry Suppose a patient is given 140mg of I−131, a beta emitter with a half-life of 8.0 days. Assuming that none of the I−131 is eliminated from the person's body in the first 4.0 hours of treatment, what is the exposure (in Ci) during those first four hours? Express... May 14, 2014 Chemistry Suppose a patient is given 140mg of I−131, a beta emitter with a half-life of 8.0 days. Assuming that none of the I−131 is eliminated from the person's body in the first 4.0 hours of treatment, what is the exposure (in Ci) during those first four hours? Express... May 14, 2014 Physics A daredevil performs a stunt in which he jumps with his motorcycle from a horizontal cliff 10m high. What must the initial velocity of the motorcycle be, in order for the stuntman to barely clear a 10m wide water canal at the base of the cliff? May 8, 2014 Physics A little girl is standing on a cliff and throws a ball straight down at a speed of 5m/s towards the ground below. How far has it fallen 2.0 seconds after it leaves her hand? May 8, 2014 Physics A ball leaves a table with an initial horizontal velocity of 2.4m/s. The height of the table is adjustable. In two runs, the height of the table is set at 2.5m and 5.0m respectively. Assume air resistance is negligible. What is the horizontal distance between the two landing ... May 8, 2014 calculus help Find the derivative of the function. y = integral from cosx to sinx (ln(8+3v)) dv lower limit = cosx upper limit = sinx y'(x) = ???? May 7, 2014 Physics/Calculus It takes a force of 21,714lb to compress a coil spring assembly on a New York City Transit Authority subway car from its height of 8in to its fully compressed height of 5in. A. What is the assemblys force constant? B. How much work does it take to compress the assembly the ... May 2, 2014 Calculus/Physics A spring has a natural length of 10in. An 800lb force stretches the spring to 14in. A. Find the force constant B. How much work is done in stretching the spring from 10 to 12 inches? C. How far beyond its natural length will a 1600lb force stretch the spring. May 2, 2014 Calculus/Physics It took 1800J of work to stretch a spring from its natural length of 2m to a length of 5m. Find the spring's force constant. May 2, 2014 science ^ get rekt May 1, 2014 Physics MCQ - Quick check Thanks Damon April 28, 2014 Calculus The following are about an infinite region in the 1st quadrant between y=e^-x and the x-axis. B)Find the volume of the solid generated by revolving the region about the y-axis Part A was solved below. Does anyone know how to do Part B? April 27, 2014 Calculus Thank you. What about part B? April 27, 2014 Calculus The following are about an infinite region in the 1st quadrant between y=e^-x and the x-axis. A) Find the area of the region B)Find the volume of the solid generated by revolving the region about the y-axis April 27, 2014 Calculus Limit as x approaches 0 of x(1-cosx)/t-sinx. Confused on how to get this answer. April 21, 2014 Calculus Determine the behavior of limits A. Limit as x approaches 1 of: (log x)/((x-1)^2) B. Limit as x approaches infinity of: ((x-1)^2)/(log x)) April 21, 2014 Calculus Thanks April 21, 2014 Calculus Evaluate limit as x approaches 0 of: csc^2(7x)tan(2x^2) April 21, 2014 CHEMISTRY HELP !!!! As a standard voltaic cell runs, it "discharges" and the cell potential decreases with time. Explain. April 19, 2014 Calculus Help!!!!! sketch the graph of the following. Show all your work and include all the important points and asymptotes. also find y' and y'' ? y= (x^3)/(x+1)^2 April 16, 2014 Physics A "reference ring" with moment of inertia Ic rests on a solid disk torsion pendulum with a moment of inertia I0. a) What is the period T0 for the motion with the disk alone? b) What is the period T1 for motion with the combined system? c) Use the expressions from a) ... April 14, 2014 algebra solve the following: 300e^.06x = 1500 April 11, 2014 algebra Evaluate: log base 5 379 April 11, 2014 CHEMISTRY HELP !!!! Check using Kb, for NH3 (from Appendix E), calculate Ka for the NH4+ ion. Kb for NH3 is 1.81 x 10^-5 Ka for NH4+ is Kw / Kb = 10^-14 / 1.81 x 10^-5 = 5.52 x 10^-10 April 10, 2014 Calculus Help Please!!! Urgent!!! If x^3 - y^3 =3 , use only implicit diff. to find d^2y/dx^2 . Express your answer in terms of x and y only and write is as a proper fraction that is completely simplified as much as possible. d^2y/dx^2= -6x/y^5 (this is the answer I should get but i don't know how to show ... April 9, 2014 Calculus Help Please!!! A stone is dropped into a lake, creating a circular ripple that travels outward at a speed of 40 cm/s. Find the rate at which the area within the circle is increasing after each of the following. after 1 s = after 3 s = after 7 s = April 2, 2014 Calculus Help Please!!! Consider the following. f(x) = 8x (square root of (x − x^2)) (a) Use a graph to find the absolute maximum and minimum values of the function to two decimal places. April 1, 2014 Damon The question was like this! March 30, 2014 Calculus Help Please!!! Verify the given linear approximation at a = 0. Then determine the values of x for which the linear approximation is accurate to within 0.1. (Enter your answer using interval notation. Round your answers to three decimal places.) ln(1 + x) ≈ x xE March 30, 2014 Physics Two pucks with similar masses collide with each other over a nearly frictionless surface. At the moment of collision, a sharp knocking sound is produced. Is this collision elastic or inelastic? Explain. March 30, 2014 Physics Consider an isolated system consisting of two masses, each of which has a velocity vector in two dimensions. When these two masses collide the total momentum of the system is conserved. (a) Show that if the total momentum of the system is conserved then the component momenta ... March 30, 2014 algebra The monthly cost of driving a car depends on the number of miles driven. Lynn found that in May her driving cost was$310 for 140 mi and in June her cost was \$450 for 700 mi. Assume that there is a linear relationship between the monthly cost C of driving a car and the ...
March 29, 2014

Physics
A 4700 kg vehicle on a level surface experiences a force applied due to the engine of 3700 N forward. If the force of friction acting on the vehicle is 189 N backward: Determine the values of the other forces acting on the vehicle. Draw a free body diagram and determine the ...
March 20, 2014

CALCULUS HELP
Let r(x)= f(g(h(x))), where h(1)=4, g(4)=5, h'(1)=3 , g'(4)=5 and f'(5)=7. find r'(1).
March 20, 2014

Calculus Help
Use logarithmic differentiation to find the derivative of the function. show steps please! y=(e^-xcos^2(x))/(x^2+x+1)
March 16, 2014

Calc
I was trying to solve the same question and couldn't find the domain. if someone can help me with it, I will be thankful.
March 16, 2014

Calc
what is the domain?
March 16, 2014

Calculus
Find equations of both the tangent lines to the ellipse x^2 + 4y^2 = 36 that pass through the point (12, 3). smaller slope y= larger slope y=
March 14, 2014