Friday
December 9, 2016

Posts by beth

Total # Posts: 829

Physics
The large disk-shaped flywheel illustrated below has a radius R of 0.25 m. It is made to spin by the small wheel that contacts it at its rim. The small wheel applies a constant force of 1430 N. Friction in the bearing exerts a retarding torque 22 Nm on the large wheel. If the ...
November 7, 2016

Physics
A cube of ice, 28 cm on each side,is melted into a measuring cup. What is the volume of the liquid water -------cm^3
November 5, 2016

physics
A cube with a mass of 40 g is made from a metal with a density of 6 g/cm3. What is the volume of the cube and the length of each edge? ----volume cm^3 -----length cm^3
November 5, 2016

Physics
In physics, work is defined as the product of the A) net force and the distance traveled B) net force parallel to the motion and direction traveled C) net force parallel to the motion and the time it is applied
November 4, 2016

physics
A ham sandwich consists of one slice of ham (9 grams) and two slices of bread (25 grams each). You have 1 kg of ham and 1.2 kg of bread. You make as many sandwiches as you can. How many sandwiches did you make? 1) How many sandwiches? 2) What is the mass of the sandwiches? g 3...
November 1, 2016

math
If a car agency charges 240.00 per week to rent a car plus 0.25 per mile. How many miles can you travel in one week for 385.00
October 31, 2016

physics
I got it! 24/8=3 24+3=27
October 29, 2016

physics
Given that 1 g of hydrogen combines completely with 8 g of oxygen to form water, how much water can you make with 10 g of hydrogen and 24 g of oxygen?
October 29, 2016

physics
A 1400 kg car is traveling at 28 m/s around a curve with a radius of 116 m. What is the angular momentum of the car?
October 27, 2016

Chemistry
The principal quantum number (n): (1) specifies the subshell of the orbital. (2) specifies the principal shell of the orbital. (3) specifies the 3-D shape of the orbital. (4) specifies the maximum number of electrons. (5) none of the above
October 27, 2016

physics
The work that a force does by acting on an object is equal to what? 1) the product of force (in the direction of motion) and distance and is negative if the force and motion are in the same direction 2) the product of force (in the direction of motion) and distance and is ...
October 26, 2016

physics
When a force acts on an object from an angle other than either 0° or 180° to the direction of motion: 1) The force is perpendicular to the direction of motion, so no work gets done. 2) The parallel and perpendicular component of the force both do work. 3) The ...
October 25, 2016

physics
The work that a force does by acting on an object is equal to what? 1) the product of force (in the direction of motion) and distance and is negative if the force and motion are in the same direction 2) the product of force (in the direction of motion) and distance and is ...
October 25, 2016

physics
A 5 kg toy car with a speed of 6 m/s collides head-on with a stationary 1 kg car. After the collision, the cars are locked together with a speed of 5.00 m/s. How much kinetic energy is lost in the collision?
October 25, 2016

Chemistry
The principal quantum number (n): 1) specifies the subshell of the orbital. 2) specifies the principal shell of the orbital. 3) specifies the 3-D shape of the orbital. 4) specifies the maximum number of electrons. 5) none of the above
October 22, 2016

Chemistry
What happens to an atom when it absorbs energy? 1) The atom stores the energy for later use. 2) The atom re-emits the energy as electromagnetic radiation. 3) The extra energy increases the speed of the electrons in their orbitals. 4) The extra energy increases the oscillation ...
October 22, 2016

Chemistry
Magnesium oxide can be made by heating magnesium metal in the presence of oxygen. The balanced equation for the reaction is: 2Mg(s)+O2(g)→2MgO(s) When 10.1 g of Mg are allowed to react with 10.5 g of O2, 14.5 g of MgO are collected. a) Determine the limiting reactant for...
October 19, 2016

Physics
You have a mass of 84 kg. How fast (in mph) would you have to run to have the same momentum as an 18-wheeler (m = 28,000 kg) rolling along at 1 mph
October 18, 2016

physics
You have a mass of 84 kg. How fast (in mph) would you have to run to have the same momentum as an 18-wheeler (m = 28,000 kg) rolling along at 1 mph
October 18, 2016

Chemistry
Calculations involving a limiting reactant Now consider a situation in which 20.0 g of P4 is added to 54.0 g of Cl2, and a chemical reaction occurs. To identify the limiting reactant, you will need to perform two separate calculations: 1) Calculate the number of moles of PCl5...
October 17, 2016

Chemistry
What is the maximum mass, in grams, of NH3 that can be produced by the reaction of 1.0 g of N2 and 1.0 g of H2 using the reaction below? N2+H2→NH3 (not balanced) What is the maximum mass, in grams, of that can be produced by the reaction of 1.0 g of and 1.0 g of using ...
October 16, 2016

Physics
A rock is thrown off a cliff with a vertical speed of 53 m/s upward and a horizontal speed of 30 m/s. A) what will these speeds Vx and Vy, be 4 seconds later? B) what will be the x and y displacements of the rock be 4 seconds later?
October 14, 2016

Physics
Al the astronaut has a weight of 1600 N when he is standing on the surface of earth. What is the force of gravity action on him when he is in space station orbiting earth at a distance of four earth radii from the center of the earth?
October 14, 2016

Physics
Angela and Paul are opposite ends of the 4.0 m long bar. Paul, whose mass is 78 kg feels attraction to Angela, whose mass is 55 kg. A: If the attraction is gravitational, how strong, in Newtons, is it? B: What are their individual weights?
October 14, 2016

Math
|x - 8|- 15 = -6 How do I solve this.. Please don't do it for me..
October 10, 2016

Math
thanks!
October 10, 2016

Math
3x + 9 = 7x - 11 How do I solve this? You said subtract three x from each side, then all eleven to both side then divide each side by 10? I'm confused...
October 10, 2016

Math
The equation of a line is -6x-2y= -18 What is the x-intercept of the line? -3 3 <-- ? 9 -9 The equation of a line is x+5=12 What is the y-intercept of a line? -12 5/12 12 <-- idk not sure 12/5 The equation of a line is 2x-2y=6 What is the slope of the line? 1 1/3 -1 -3 &...
October 10, 2016

Match *checking answers*
Math sorry..
October 10, 2016

Match *checking answers*
The equation of a line is -6x-2y= -18 What is the x-intercept of the line? -3 3 <-- ? 9 -9 The equation of a line is x+5=12 What is the y-intercept of a line? -12 5/12 12 <-- idk not sure 12/5 The equation of a line is 2x-2y=6 What is the slope of the line? 1 1/3 -1 -3 &...
October 10, 2016

physics
Please help! The planet Mercury has a radius of about 0.38 Earth radii and a mass of only 0.055 Earth masses. Estimate g on Mercury
October 8, 2016

Chemistry
Identify the oxidation-reduction reactions among the following: 1. Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(s) 2. 2Na(s) + Cl2(aq) → 2NaCl(s) 3. 2Mg(s) + O2(g) → 2MgO Identify the oxidation-reduction reactions among the following: 1 and 2 only 2 and 3 only 1 and 3 ...
October 3, 2016

Physics
When an item has been launched into orbit, what happens? 1: It continues to fall but its path never reaches the ground. 2: Centripetal force from Earth's gravity keeps it from being accelerated toward Earth. 3: It no longer falls because the weakness of Earth's gravity...
October 1, 2016

Science
How many grams of sodium bicarbonate (NaHCO3) are needed to make a 0.6M solution?
September 14, 2016

Math
The union of sets P = {1, 2, 3, 4, 5, 6} Q = {4, 5, 6, 7, 8, 9} is given by which of the following? {1, 2, 3, 4, 5, 6, 7, 8, 9} {1, 2, 3, 4, 4, 5, 5, 6, 6, 7, 8, 9} ø {4, 5, 6}
August 29, 2016

Research Methods
Thinking of a survey you might design for a commercial client such as a software company or a restaurant, what are the ethical implications of using the survey results to publicize your own research firm? Looking forward to some ideas! Thanks!
July 11, 2016

Math
A flag has a length of 1 1/4 feet when the width is 1 2/7 feet. Write the ratio to the width as a fraction in simplest form.
June 23, 2016

Math
Consider an airplane headed N 60 degrees W at a speed of 400 mph. What wind direction at a speed of 75 mph will produce a resultant direction of N 50 degrees W?
June 8, 2016

Pre Calc
visually show on compass/vector graph n 60 degrees w at 400 mph, n 40 e at 75 mph
June 7, 2016

Pre Calc
Airplane going N 60 degrees W at a speed of 400 mph. What wind direction, at a speed of 75 mph will produce a resultant direction of N 50 degrees W
June 7, 2016

advanced science
A 230 kg steel crate is being pushed along a cement floor. The force of friction is 480 N to the left and the applied force is 1860 N to the right. What is the acceleration of the crate? (Hint: remember to find net force first) a=6.00 m/s2 a=28.1 m/s2 a=8.10 m/s2 a=6.0 m/s2
June 3, 2016

advanced science
A 230 kg steel crate is being pushed along a cement floor. The force of friction is 480 N to the left and the applied force is 1860 N to the right. What is the normal force? A. 480 N down B. 480 N up C. 2300 N down D. 2300 N up
June 3, 2016

advanced science
A 230 kg steel crate is being pushed along a cement floor. The force of friction is 480 N to the left and the applied force is 1860 N to the right. The forces acting on the crate are __________________. A. balanced B. unbalanced
June 3, 2016

Math
Help please. .6 is 266 2/3% of what number?
May 13, 2016

English
The answer is A. She was in awe of the size of the dust cloud.
May 8, 2016

Bus. Math
Umm...most of these look wrong. Anyone have the solutions?
April 4, 2016

MATH HELP
Zoro Manufacturing Company manufacturers wooden picture frames. Each piece of wood yields 15 frames. Each piece of wood costs $18.75. The direct labor charge is $13.50 per hour. Sixty-five frames can be produced each hour. To the nearest tenth of a cent, what is the prime cost...
March 2, 2016

MATH HELP
I just don't get it
March 2, 2016

Math
I need help please. the mean distance of earth from the sun is 92,960,000 which is 258% of the mean distance of mercury from the sun. What is mercury’s mean distance from the sun in ten millions of miles?
February 28, 2016

Math
I need help please. the mean distance of earth from the sun is 92,960,000 which is 258% of the mean distance of mercury from the sun. What is mercury’s mean distance from the sun in ten millions of miles?
February 28, 2016

MATH PLEASE
0.0293262879789 Rounded to nearest hundredth percent.
February 17, 2016

MATH HELP
Determine the annual dividend and the annual yield to the nearest hundredth of a percent. Joyce buys 350 shares of KOW, Inc, that has a high of 42.50 per share and a low of 23.60. Last year the company paid annual dividends of $0.58 per share. (a) What is the total annual ...
February 17, 2016

MATH HELP
Determine the annual dividend and the annual yield to the nearest hundredth of a percent. Ella Franklin owns 325 shares of ITA stock. Purchase price was 37.85 per share dividends are 1.11 per share
February 17, 2016

MATH
Ben Garrison invested $15,000 at 5% compounded daily in a credit union account that matures in 1 year. He also invested 20000 at 5.25% compounded monthly in a Silver Screen account that matures in 4 years. (a) What is the interest earned at maturity for both accounts? (b) What...
February 12, 2016

Math
May Wattson has 50000 to invest in a 4-year certificate of deposit that earns an interest rate of 3.75% compounded monthly or 3.50% compounded daily. Based on annual yield which is the better investment?
February 12, 2016

MATH
Mabel has $35,000 to invest in a certificate of deposit for 4 years. The certificate of deposit earns interest at 4.75% compounded daily. What is the annual percentage yield to the nearest thousandth of a percent?
February 12, 2016

MAth
I got that also but its not correct and its driving me crazy
February 12, 2016

MAth
Tammy Smith Deposits $5000.00 in First Internets Bank 5-year CD which pays 5.22% interest compounded monthly how much interest will she have in the account in 5 years?
February 12, 2016

Physics
Two ropes attached to a young tree are pulled by two landscapers. Rope 1 is pulled with 267 N of force at an angle of 23 degrees north of east and Rope 2 is pulled with 377 N of force due west. a) Determine the magnitude and direction of the resultant force acting on the tree ...
February 4, 2016

Math
Got it. Thank you for clearing that up!
February 3, 2016

Math
Find the intervals on which the function is increasing, decreasing, concave up, or concave down and find any local extreme values and inflection points. So I know how to do the above, but not with piece wise functions. Someone help me out? Y={3-x^2, x<0 and x^2+1, x>=0} ...
February 3, 2016

Physics
Two ropes attached to a young tree are pulled by two landscapers. Rope 1 is pulled with 267 N of force at an angle of 23 degrees north of east and Rope 2 is pulled with 377 N of force due west. a) Determine the magnitude and direction of the resultant force acting on the tree ...
February 3, 2016

Physics
Two ropes attached to a young tree are pulled by two landscapers. Rope 1 is pulled with 267 N of force at an angle of 23 degrees north of east and Rope 2 is pulled with 377 N of force due west.
February 3, 2016

Intro to Paralegalism I
In what state a person may take the bar examination without a formal legal education?
January 23, 2016

calculus
It is estimated that t years from now, the value of a small piece of land, V(t), will be increasing at a rate of 1.6t^3/(0.2t^4+8100)^(1/2)dollars per year. The land is currently worth $420. Find V(t) and also find the value of the land after 10 years to the nearest cent.
January 12, 2016

Business Law
In trademark term, what is acquiring secondary meaning?
January 10, 2016

Check My work ( math)
are they correct
January 7, 2016

Check My work ( math)
1.) Years: 1 2 3 4 5 6 7 8 Height: 2.1 3.2 6.8 7.3 11.2 12.6 13.4 15.9 about about tall would you expect these trees to be after 22 years ? a.)22.31 ft b.)35.2 ft c.)44.25**** d.)46.2ft 2.)temp:68 77 83 85 89 94 96 99 number of cones:403 447 457 465 489 503 543 576 what is the...
January 7, 2016

buisness communication
Repeating in your own words the verbal content of the critic's message is: paraphrasing. checking for feelings. checking for inferences. buying time with limited agreement.
January 6, 2016

Math
It should be plus and minus 1 though right?
January 4, 2016

Math
y=arccos(sin(x)), find dy/dx. I got -1, is this correct? When I tried to check on wolfram alpha I didn't get this right.
January 4, 2016

Math
Okay, what you say makes sense, but what do I do with the (Pi/2)?
January 4, 2016

Math
y=arccos(sin(x)), find dy/dx and sketch it's graph(I guess I can do this on wolframalpha after I'm done solving the question). And by arcsin I mean inverse of the expression(written like cos^-1(sin(x)), but is not 1/cos(sinx) but the inverse of cos). I am not getting ...
January 4, 2016

Math
Write an equation for the tangent to the curve y=sinmx at the origin. I got y=mx, is this correct? Please help by showing work! Thanks
January 3, 2016

Math
But I was wondering- is it possible to use the (f•g)'= f'(g(X))*g(X)' and still obtain the same answer? For the composite rule, we sub u into the dv/du equation and then take the derivative of that ONCE. Then we multiply that entire function by pi which is the...
January 2, 2016

Math
This looks right! Thanks so much!!
January 2, 2016

Math
If f(u)=u+1/(cos^2u) , u=g(x)=pi(x), x=1/4 , find the derivative of f(g(x)). I can't seem to get this one, step by step please?
January 2, 2016

Math
A line 'l' intersects line 'm' at point A at 45 degree angle. B and C are points on line m, where the distance from B to A is equal to the distance from A to C. How many points on line 'l' are equidistant from points B and C? How is it one point? And ...
December 29, 2015

Math
Derivative of y=sec(tanx)? I don't get how it is secxsecx*secxtanx*tanxtanx. Where does an extra tanx come from? Derivative of sec(tanx) is just secxtanx*tanx (and then multiply the inside as well so)* sec^2(X) as derivative of tanx. I have 2 tanx, where did the third one ...
December 27, 2015

Math
So the answer is supposed to be sin(2x)/(1+cosx)^3 but I was wondering for the numerator why the distributive law doesn't apply when we would multiply the derivative of the outside with the inside?
December 27, 2015

Math
Wait sorry, you just expanded. But shouldn't it be sin times sin? Not sin times cos? Since derivative of the 1+cos is -sin and the numerator is a sin?
December 27, 2015

Math
I think you did the quotient rule wrong. Should be minus not plus
December 27, 2015

Math
Find the derivative of y=(sinx/(1+cosx))^2. I used the chain rule, but the second part involved the quotient rule which gives a very complicated expression that u do not know how to simplify. Could you please give me a detailed step by step solution for the simplifying part? ...
December 27, 2015

Math
So I found the derivative of an expression and I cannot figure out how to simplify the final answer into the desired form. I got -csc^2(X)/(1+cotx)^2. Now how do I simplify this into -1/(sinx+cosx)^2. Help, it's killing me ahha. Thanks!
December 23, 2015

Math
Wait sorry, scratch all of that. How did you get df/dg????
December 17, 2015

Math
Could you please explain how dg/dx is 6 over 2times square root of x?
December 17, 2015

Math
Was wondering where the y and X came out of? I thought it was just f and u?
December 17, 2015

Math
find value of (f•g)'(x) at x=1 for f(u)=cot(pi*u/4), u=g(x)=6(square root(x)) By the way, the little dot is supposed to be hollow above, as in f of g of x.
December 17, 2015

Math
Find the equation of the line tangent to curve x=sec(t), y=tan(t), at t=pi/6. I found th slope(derivative of the two which was csc(t). Plugged in Pi/6 and got 2 as the slope. Now how do I find the equation of the tangent? There are like two equations to work with, I'm ...
December 17, 2015

Math
Find values of x for which the piecewise function g(x): 1) (x+1)^2, x=<0 2) 2x+1, 0<x<33) (4-x)^2, x>=3is differentiable. I got xer, x cannot equal 3 and 0, but the answer key only has 3. WHy isn't 0 one either since the derivative is different on either sides?
December 15, 2015

Math
graph is a piecewise; f(x)= 1) 2-2x-x^2, x<0 and 2) 2x+2, x>=0. Determine whether graph has a tangent at x=o. If it does not, explain why not. I have no idea. When I plug in x=0, both equations give 2, but answer key says it does not exist. Explain?
December 13, 2015

Math
how is 2*6.1 equal to 32.2??
December 13, 2015

Math
Free fall equation is s=6.1t^2 ft, where t is in seconds. Assume a rock is dropped from a 100 ft cliff. Find speed of the rock at t=3.5 sec.
December 13, 2015

Math
lim (tanx-2x)/(2x-sinx) as X->0 I have no idea how to manipulate the units and isolate something that will somehow give me -1? Thanks in advance!!
December 9, 2015

calculus
Find the critical numbers x1 and x2 of y=(9x^2+3)/4x.
December 7, 2015

calculus
Use implicit differentiation to find the slope of the tangent line to the graph of 18*x^(1/2)+5y^(1/2)+14 at(81/324,1)
December 7, 2015

calculus
Find the derivative of y=(7x^(1/3))/(x^2+9)
December 7, 2015

calculus
Find the derivative of 4sinx(6cosx+9sinx) at x=¦Ð/6.
December 7, 2015

calculus
Use the Trapezoidal Rule to approximate ¡Ò8 4 ln(x2+5) dx using n=3. Round your answer to the fourth decimal place.
December 2, 2015

Chemistry
Determine the number of moles of N2 that are required to produce 12 mol of NH3 using the equation, N2 + 3H2 --> 2NH3. 12 mol NH3 x 1 mol N2/2 mol NH3 = 6 moles of N2.
November 29, 2015

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