Tuesday

August 4, 2015

August 4, 2015

Number of results: 40,442

**physics**

A robot arm expends 15J of work to extend a spring 10cm from its equilibrium position. How much force is required?
*November 30, 2014 by Leah*

**Algebra 2**

Solve each polynomial equation. If a solution occurs more than once, state it's multiplicity. 4x^4-13^2+9=0 Please show work I need help
*December 11, 2014 by Alicia*

**mrr high school**

Find the power of human heart ,which beats72 times per minute , if it does 1.5J of work every beat.
*January 2, 2015 by mona*

**Chemistry**

HAve to find a formula to work out the energy required to thermally decompose water into hydrogen and oxygen.
*January 12, 2015 by Big*

**chemistry**

How much work is done at 1.2 atm and 316 K when 1 mole of propane undergoes combustion? C3H8 (l) + 5O2 (g) → 3CO2 (g) + 4H2O (l)
*January 21, 2015 by madison*

**physics **

You work at a garden store for the summer. You lift a bag of fertilizer with a force of 122 N, and it moves upward with an acceleration of 0.760 m/s2.
*February 8, 2015 by Eva*

**Physics**

While rearranging a dorm room, a student does 312 J of work in moving a desk 2.0 m. What was the magnitude of the applied horizontal force?
*February 13, 2015 by yazi*

**Vectors Math**

A 5 N force which acts along the direction vector (2, 3), moves an object from A(1, 3) to B(3, 7). Find the work done if the given units are metres.
*February 23, 2015 by Jaidon B*

**math please help **

In a triangle, we have <ABC = <ACB = <DEC=<CDE, BC = 8, and DB = 2. Find AB. How should i approach this? will sss similarity work?
*April 2, 2015 by Gem*

**pre-calc**

Use mathematical induction to prove that the statement is true for every positive integer n. Show your work. 2 is a factor of n2 -n+2
*April 17, 2015 by Ciara*

**Physics**

Calculate the work required to pull a wagon along a horizontal road for 4.0x10^2 m at a constant speed of 3.0 m/s if the force of friction is 8.0 N.
*April 28, 2015 by Richard*

**ANT101 **

The ___ method of anthropology is useful in many different work settings. (Points : 1) marketing pedagogical statistical participant observation
*May 2, 2015 by Anonymous*

**Math**

I need help with one of the algebra with pizzazz worksheets. Its DD-39 AKA "Why did the banana go out with the prune?" I got the answers but not the work. Please help.
*May 27, 2015 by Bayley*

**Chemistry**

What is the total internal energy change (∆E), in J, of a system that releases 202.90 J of heat and absorbs 315.7 J of work from the surroundings?
*June 10, 2015 by Katie*

**fct Omoku Nigeria**

Calculate the work done when a system raises a volume of water of radius 5.0mm through 10cm in thermodynamic.
*July 8, 2015 by mokwe chioma Rose*

**Taylor seires**

f(x) =ln (1-x) a) Compute f'(x), f''(x), f'''(x). Spot the pattern and give an expression for f ^(n) (x) [the n-th derivative of f(x)] b) Compute the MacLaurin series of f(x) (i.e. the Taylor series of f(x) around x=0) c) Compute the radius of convergence and determine the ...
*November 26, 2006 by Jill*

**chemistry**

how would you begin this question? An empty 15.0 L cylinder, .500 moles of gaseous PCl5 are added and allowed to reach equilibrium. The concentration of PCl3 is found to be .0220M. (Temp at 375K) PCl3(g) + Cl2(g) --> PCl5(g) i need to fine how many moles of PCl5 remain at ...
*April 28, 2007 by Anonymous*

**ALGEBRA 1!PLZ HELP!**

Use the Substitution method to solve the system of equations. y - 2x = -5 3y - x = 5 Solve the first equation for y. y = 2x-5 Substitute that for y in the second equation and solve for x. Then use the value of x to substitute back into the first equation and solve for y. Post ...
*November 6, 2006 by SANDRO!*

**physics**

I keep on getting the second part wrong. Can you please tell me where I messed up? Thank you. The lead female character in the movie Diamonds Are Forever is standing at the edge of an offshore oil rig. As she fires the gun, she is driven back over the edge and into the sea. ...
*June 26, 2015 by Lola*

**Chemistry**

drwls, if you are there, I got an answer of 42.5 Kelvin, so then that means it is a negative number if converted to degrees Celsius? Question: The heat capacity of a bomb calorimeter is 87.5 kJ/K (this value is for the total heat capacity including that of the water jacket ...
*December 12, 2007 by Anne*

**math**

1)The area A of a triangle varies jointly as the lengths of its base b and height h. If A is 75 when b=15 and h=10,find A when b=8 and h=6 2)Determine the equation of any vertical asymtotes of the graph of f(x)=2x+3/x^2+2x-3 1) Area of a triangle is 1/2 b*h=A use the formula ...
*August 21, 2007 by Marissa*

**7th grade math Ms. Sue please help I have no idea!**

#10 On a blueprint, 1 inch = 13 feet. If the dimensions of the playroom on the blueprint are 0.35 inches x 1.25 inches, what are its actual measurements? * *Show all your work for full credit* #11 The coordinate of rectangle ABCD are given. Find the coordinates of its image ...
*November 5, 2012 by Delilah*

**statistics**

To find out what people think, the Gallup Poll selected a random sample of 520 women and 506 men. The pollsters showed them a list of personal attributes and asked them to indicate whether each attribute was “generally more true of men or of women”. When asked about ...
*June 27, 2014 by Devin*

**check over--**

this is a book review for 9th grade honors english. does it look OK? are there any errors or anything? thanks-- The novel Dairy Queen by Catherine Murdock is the story of 15-year-old D.J. Schwenk who lives in Red Bend Wisconsin. Her father gets injured and can no longer take ...
*May 29, 2008 by Anonymous*

**accounting**

Situation Parent, Inc. is contemplating a tender offer to acquire 80 percent of Subsidiary Corporation's common stock. Subsidiary's shares are currently quoted on the New York Stock Exchange at $85 per share. In order to have a reasonable chance of the tender offer attracting...
*January 14, 2010 by John Ackah*

**Math**

Determine the color, driver and mpg of each car by the information: * Five different drivers -- Cox, Durham,Gosling, Heynek and Wollinsky. ---------------------------------------- * Car colors-- blue, green, red, white and yellow. ---------------------------------------* Each ...
*August 29, 2008 by Mary*

**math help, test tomorrow!!!**

For 0 <or equal B <or equal 2 pi determine all solutions of sinB + cos B = SinBcosB find the area circle with a 7inches radius.use22/7.
*November 21, 2006 by hi*

**Science**

Explain why the life cycle and skin of the frog make it a good indicator animal if you want to determine the health of local ecosystems. Please please help. Thanks so much.
*September 9, 2007 by mary*

**Math**

To determine if 3417 is prime, you would have to try dividing 3417 by every whole number less than 3416. True or false and how did you get the answer
*December 4, 2007 by Beth*

**Statistics**

Some IQ scores are standardized with a mean of 100 and a standard deviation of 16. Using the 68-95-99.7 Rule, Determine: In what interval you would expect the middle 95% of the IQ scores to be found.
*February 25, 2008 by Math help*

**Biology**

Unit of measurement that scientists use to determine the diameter of an animal cell is the 1 - millimeter 2 - micrometer 3 - nanometer 4 - meter I am stuck on this question, but I believe it is #3 nanometer
*March 10, 2008 by Sarah*

**chemistry**

When referring to percent ionization values given in a acid/base table, how to determine what is the hydrogen ion concentration of a 0.10 mol/L solution of hydrofluoric acid?
*April 8, 2008 by Jay*

**Biology-Introduction to Animals**

Describe the organization of the animal kingdom and at least 6 physical characteristics scientists consider to determine the evolutionary relationships among animals.
*May 6, 2008 by Mike*

**math question**

I have the equation 3f+2.50h=240 and I want to make a table of values with at least five possible combinations. How do I determine which combinations I should use?
*June 1, 2008 by Calie*

**Grammar**

Determine the category of "friendly" in the following sentence. Use the substitution and co-ordination tests to justify your answer: David gave Mary friendly advice.
*October 6, 2008 by Danielle*

**math**

Isosceles Triangle ABC is inscribed in a circle with radius 12cm. Aide AB is a diameter. Determine the perimeter of the triangle, correct to one decimal place.
*July 26, 2009 by Amy*

**PHYSICS**

The four tires of an automobile are inflated to an absolute pressure of 200000 Pascals. Each tire has an area of 0.024 m^2 in contact with the ground. Determine the weight of the automobile.
*February 21, 2010 by Helen*

**Pre-Cal**

1) use the half-angle formulas to determine the exact values of the sine, cosine, and tangent of the angle. 67 degrees and 30' Please explain!! I do not know how to start.
*March 1, 2010 by Janet*

**physics**

given 1000 mL of helium at 15degrees C and 763mmHg, determine its volume at -6degrees C and 420 mmHg. my friend said she got 1.68 x 10^3 mL help, I have no idea how she got it
*March 6, 2010 by phyllis*

**Chemistry**

In an experiment, a student mixes equal volumes of 0.0020M Pb 2+ ions with 0.0040M I- ions. The trial ion product is? PbI2 <-> Pb 2+ + 2I- How do you determine the final concentration of Pb 2+ and I-?
*March 7, 2010 by sh*

**chemistry**

Give the cell diagram notation of the electrochemical cell that could be used to determine experimentally the dissociation constant (Kw) of water. The standard reduction potential for: O2 + 2H20 + 4e- ---------> 4 OH- 0.40 V
*March 9, 2010 by anne*

**math 116**

After solving a system of linear equations, how can you check your answer to determine whether it is correct? Demonstrate the process of checking an answer with an example.
*March 10, 2010 by earl*

**Calculus**

A certain radioactive material decays exponetially. The percent, P, of the material left after t years is given by P(t)= 100(1.2)^-t a)Determine the half life of the substance
*April 13, 2010 by lala*

**Chemistry **

Determine the molarity (in mol/L) of NO2− ions in solution when 9.77×101 g of sodium nitrite is added to enough water to prepare 3.94×102 mL of the solution.
*March 2, 2011 by Colin*

**Alg2**

A piece of wood discovered in an archaeological dig was found to have lost 62% of it's carbon-14. Carbon-14 has a half-life of 5630 years. Determine it's age.
*June 1, 2010 by Cal*

**CHEM (PLEASE HELP ASAP)**

The deltaS for a reaction is 3.0 J/(mol*K) at 25 degrees C. Caluculate the deltaG for the reaction when DeltaH = -394 kL and determine whether it will occur spontaneously at this temperature
*June 8, 2010 by Maria*

**Calc 2 college**

Modeling with differential equations. If a bacteria culture doubles every 10 minutes and the original culture has 300 cells determine the rate of growth.
*July 9, 2010 by Marianne*

**math**

determine wheather 453 is divisible by 3,9 my answer is yes because 3and nine are equally divided by 3,9 is 2,3,4,6,8 divusble by 672 is 3,9 999 is 5200 divisble by 2,5,10 is 504 divisible by 2,4,6,8
*August 2, 2010 by kamleen*

**Math**

An engineer is designing a parabolic arch. The arch must be 15 m high, and 6 m wide at a height of 8 m. a) Determine a quadratic function that satisfies these conditions. I've got : 8=a(6-h)^2+15, but i don't know what to do next.
*August 22, 2010 by Emily*

**College Chem.**

Determine the longest wavelength of light required to remove an electron from a sample of potassium metal, if the binding energy for an electron in K is 1.76 × 103 kJ/mol.
*September 1, 2010 by B*

**math**

the width of a rectangle is fixed at 4cm. Determine in terms of an inequality those lengths for which the area will be less than 92cm^2 the length must be less than ? cm the solution is {L|L< ? cm
*September 18, 2010 by Anonymous*

**College Physics**

The four tires of an automobile are inflated to a gauge pressure of 2.0x10^5 Pa. Each tire has an area of 0.024m^2 in contact with the ground. Determine the weight of the automobile.
*October 17, 2010 by Samantha*

**physics **

During a swing the head of a golf club is in contact with the ball for about 0.5 ms and the ball goes from zero to 69 m/s. Assuming the acceleration is constant, determine its value.
*October 24, 2010 by Anonymous*

**Physic**

A block moves up an incline of 45 inches at constant speed, because the action of a force of 15 N parallel to the incline. If the coefficient of kinetic friction is 0.3. Determine the weight of the box.
*November 7, 2010 by Luz*

**college organic chemistry**

two substances,a and b have same melting point.How can you determine if they are the same without using any form of spectroscopy? Explain in detail.
*November 11, 2010 by Anonymous*

**Statistics**

In a study to determine if you can predict stock price based on P-E ratio, what is the response variable and what is the explanatory variable? How would you label the X and Y axes in a scatterplot of the data?
*January 4, 2011 by Josh*

**Physics**

How do you determine the force constant of a spring when given the mass of an object being hung vertically, and the distance the spring stretches? What formula and logic do I need?
*January 10, 2011 by Jon*

**Physical science**

An object is projected vertically upwards and returns to the point of projection 12s later. Ignore air resistance and determine the velocity with which it was projected?
*February 7, 2011 by Thakgalo sakwana*

**gen chem 2**

In the chemical kinetics experiment, determine the dilution of the stock bleach solution. The bleach used will be around 5.5% (weight/volume). Convert this to molarity
*February 8, 2011 by jen*

**chemistry**

an ideal gas at 75.0 c and 760 .mm hg is contained in a flexible vessel. Its volume is doubled and the pressure remains.unchanged .determine the temperature of the gas as a consequence of these changes
*August 26, 2011 by devin boutte*

**physics**

a student pushes a 10 kg box across a warehouse floor. if the boz accelerates at 3 m/s/s and the force of friction is 20 newtons. determine the size of the students applied force?
*March 14, 2011 by hi*

**PHYSICS!!**

a student pushes a 10 kg box across a warehouse floor. if the boz accelerates at 3 m/s/s and the force of friction is 20 newtons determine the size of the students applied force
*March 14, 2011 by chrissy*

**Acid/Base Chem**

Determine the volume (in mL) of 1.18 M perchloric acid (HClO4) that must be added to 747 mL of 0.976 M sodium hydrogen citrate (Na2C6H6O7) to yield a pH of 4.77.
*March 30, 2011 by Sam*

**Chemistry**

Use the equation to determine what volume of nitrous oxide can be produced from the decomposition of o.55 moles of ammonium nitrate useing the equation: NH4NO3 (s)--> N2O (g) + 2H2O (g)
*April 14, 2011 by Jane*

**physics **

An FM radio station broadcasts its signal at a frequency of 9.15 ×107 hertz. Determine the wavelength of the signal in air. Round your answer to the nearest hundredth of a meter.
*April 18, 2011 by ashley --*

**Logic**

Using truth tree decomposition, determine the consistency of the set of propositions. Include line numbers and justifications, and recover the truth values if consistent. {A and B, ~B v C}
*May 16, 2011 by Isaac*

**math**

katie makes 70% of her shots from the free throw line . can you determine how many consecutive free throws she must make in order to increase her precent. explain
*June 8, 2011 by amanda*

**chemistry**

so i have a table that tell me whether the its a strong/ weak acid/ base but how do i use it to determine whether the equation will favor left or right of the equilibrium?
*August 6, 2011 by Henry*

**physics**

A linear charge of nonuniform density E(x)=bx C/m, where b = 5.2 nC/m2, is distributed along the x-axis from 4.9 m to 6 m. Determine the electric potential (relative to zero at infinity) of the point y = 8.6 m on the positive y-axis.
*September 24, 2011 by physics*

**Physics**

A concave mirror has a focal length of 37 cm. Determine the object position for which the resulting image is upright and four times the size of the object. Answer in units of cm
*September 25, 2011 by Leslie*

**Physics **

A mercury barometer reads 744 mm on the roof of a building and 769 mm on the ground. Assuming a constant value of 1.29 kg/m3 for the density of air, determine the height of the building.
*March 5, 2012 by Jackie *

**physics **

A mercury barometer reads 744 mm on the roof of a building and 769 mm on the ground. Assuming a constant value of 1.29 kg/m3 for the density of air, determine the height of the building.
*March 5, 2012 by Jackie *

**please help!! algebra**

systems of nonlinear equations i need to help i have tried this problem but i cannot find the right answer i need to determine the real solutions for this: x^2+4xy=10 4x^2-xy=6
*April 9, 2012 by ashley*

**physics**

determine the acceleration of a 25 kg crate being dragged across a floor by a 150 N force at a 42 degree angle above the floor where the kinetic coefficient of friction is .52.
*April 23, 2012 by Syd*

**physics**

The inside diameters of the larger portions of the horizontal pipe depicted in Figure P9.47 are 2.80 cm. Water flows to the right at a rate of 1.80 10-4 m3/s. Determine the inside diameter of the constriction.
*June 20, 2012 by henry*

**math**

Draw one more rectangle using a ratio of 1:3 (a rectangle that is triple the width and length of the original shape). Determine and label the perimeter and area.
*August 3, 2012 by monica*

**Chem II/College**

Using the Clausius Clapeyron equation determine the vapor pressure of water at 50.0 degrees C. The molar heat of vaporization of water is 40.7 kJ/mol. How do you solve this?
*October 7, 2012 by Bianca*

**Physics HELP!!**

Two masses of 3.40kg and 4.55kg are connected by a light string that passes over a frictionless pulley. Determine the tension in the string. b). Calculate the acceleration of m
*October 28, 2012 by Angie*

**Physics**

a car that weights 15000 N is initially moving at 60 km/hour when the brakes are applied. The car is brought to a stop at 30 meters. Determine the magnitude of the braking force
*November 14, 2012 by Gloria*

**science,physics**

A ship is heading due north at 12km/h in a tide moving 5km/h westward. Determine the magnitude and direction of the resultant velocity of the ship?
*November 25, 2012 by secrated*

**Science **

4. Given the chemical formulas of the following compounds, name each compound and state the rules you used to determine each name. • RbF • CuO • (NH4)2C2O4
*December 19, 2012 by Taylor*

**Chemistry Urgent please help! Test tomorrow **

if you have a mixture of sodium chloride and sodium bromide, could you use its conductance to determine the concentration of each solution? explain
*January 9, 2013 by Anonymous*

**Physics**

A particle is moving along the x-axis subject to the potential energy function U(x) = a(1/x) + bx2 + cx – d, where a = 6.00 J m, b = 26.0 J/m2, c = 3.00 J/m, and d = 26.0 J. Determine the x-component of the net force on the particle at the coordinate x = 3.37 m. Not sure what ...
*February 27, 2013 by Thomas*

**math**

Tricia wants to determine the probability of getting two 1’s when two number cubes are rolled. She makes a tree diagram and uses it to list the possible outcomes
*March 26, 2013 by xy*

**physics**

A child accelerates upwards in an elevator which causes his apparent weight to become 405N. Determine the magnitude of the elevators acceleration if his normal weight is 400N.
*March 29, 2013 by maddi*

**Physics! please help me!**

A 0.98 N bird descends onto a branch that bends and goes into SHM with a period of 0.46 s. Determine the effective elastic force constant of the branch.
*April 24, 2013 by Chelsea*

**Physics**

A winch is capable of hauling a ton of bricks vertically two stories (6.50 ) in 22.5 If the winch’s motor is rated at 5.00 , determine its efficiency during raising the load.
*June 5, 2013 by Anonymous*

**science**

The atomic mass of lithium is 6.94, the naturally occurring isotopes are 6Li = 6.015121 amu, and 7Li = 7.016003 amu. Determine the percent abundance of each isotope.
*June 11, 2013 by Annika*

**Math check**

Consider the following. (Give your answers correct to two decimal places.) (a) Determine the value of the confidence coefficient z(á/2) for 1 - á = 0.87. Incorrect: Your answer is incorrect. . 0.44
*June 15, 2013 by Tom 8*

**Physics**

When point charges q1=+8.4uC and q2=+5.6uC are brought near each other, each experiences a repulsive force of magnitude 0.66N. Determine the distance between the charges.
*August 28, 2013 by sarah*

**Physics**

When point charges q1=+8.4uC and q2=+5.6uC are brought near each other, each experiences a repulsive force of magnitude 0.66N. Determine the distance between the charges.
*August 28, 2013 by sarah*

**Physics**

When point charges q1=+8.4uC and q2=+5.6uC are brought near each other, each experiences a repulsive force of magnitude 0.66N. Determine the distance between the charges.
*August 28, 2013 by sarah*

**PHYSICS**

A rod 14.0 cm long is uniformly charged and has a total charge of -20.0 ÂµC. Determine the magnitude and direction of the electric field along the axis of the rod at a point 36.0 cm from its center. N/C
*September 13, 2013 by vishal*

**physics**

A rod 14.0 cm long is uniformly charged and has a total charge of -20.0 ÂµC. Determine the magnitude and direction of the electric field along the axis of the rod at a point 36.0 cm from its center. N/C
*September 22, 2013 by suhani*

**PHYSICS**

A rod 14.0 cm long is uniformly charged and has a total charge of -20.0 ÂµC. Determine the magnitude and direction of the electric field along the axis of the rod at a point 36.0 cm from its center. N/C
*September 23, 2013 by suhani*

**PHYSICS**

A rod 14.0 cm long is uniformly charged and has a total charge of -20.0 ÂµC. Determine the magnitude and direction of the electric field along the axis of the rod at a point 36.0 cm from its center. N/C
*September 24, 2013 by suhani*

**PHYSICS**

A rod 14.0 cm long is uniformly charged and has a total charge of -20.0 ÂµC. Determine the magnitude and direction of the electric field along the axis of the rod at a point 36.0 cm from its center. N/C
*September 27, 2013 by suhani*

**PHYSICS**

A rod 14.0 cm long is uniformly charged and has a total charge of -20.0 ÂµC. Determine the magnitude and direction of the electric field along the axis of the rod at a point 36.0 cm from its center. N/C
*September 28, 2013 by physics*

**PHYSICS**

A rod 14.0 cm long is uniformly charged and has a total charge of -20.0 ÂµC. Determine the magnitude and direction of the electric field along the axis of the rod at a point 36.0 cm from its center. N/C
*September 28, 2013 by physics*

**PHYSICS**

A rod 14.0 cm long is uniformly charged and has a total charge of -20.0 ÂµC. Determine the magnitude and direction of the electric field along the axis of the rod at a point 36.0 cm from its center. N/C
*September 29, 2013 by physics*