Thursday

January 19, 2017
Total # Posts: 3,381

**physics**

A 1500-N uniform boom at = 61.0° to the horizontal is supported by a cable at an angle θ = 29.0° to the horizontal as shown in the figure below. The boom is pivoted at the bottom, and an object of weight w = 2350 N hangs from its top.

*October 29, 2012*

**PHYSICS 2**

A horizontal wire that runs east-west carries a steady current to the east. A C-shaped magnet is placed so that the wire runs between the poles, with the north pole above the wire and the south pole below. What direction of the magnetic force on the wire between the poles?

*October 28, 2012*

**biology**

If your ears were larger, you would: a. be able to hear sounds at lower amplitude (softer sounds) b. lose the ability to hear low amplitude high frequency sounds c. not experience any difference in your hearing ability d. none of the above

*October 27, 2012*

**biology**

When the stereocilia of a hair cell in the inner ear bends, it causes: a. potassium ions to enter the hair cell b. you to hear low frequency sounds c. chloride ions to leave the basilar membrane d. all of the above

*October 27, 2012*

**History**

There was a threat of American expansion into British North America. Where were the concern of the Americans expanding too? Why would this area be a prime target?

*October 26, 2012*

**Canadian History**

There was a threat of American expansion into British North America. Where were the concern of the Americans expanding too? Why would this area be a prime target?

*October 26, 2012*

**physics**

A 4.170 kg block of wood rests on a steel desk. The coefficient of static friction between the block and the desk is μs = 0.505 and the coefficient of kinetic friction is μk = 0.255. At time t = 0, a force F = 12.7 N is applied horizontally to the block. State the ...

*October 25, 2012*

**Health**

D. none of the above are correct

*October 25, 2012*

**math**

A (2,-3)b(4,4) C (6,-8) i think these are most likely

*October 24, 2012*

**math**

triangle ABC, with vertices A(2,3), B(4,-4), C(6,8), is reflected across the x-axis to form a triangle A'B'C'. Give the new coordinates for triangle A'B'C'.

*October 24, 2012*

**Biology**

WHY WOULD PLANT CELLS HAVE 1 LARGE CENTRAL VACUOLE AND NOT SEVERAL SMALL ONES LIKE IN AN ANIMAL CELL?

*October 23, 2012*

**Biology**

thanks :)

*October 23, 2012*

**Biology**

WHY WOULD PLANT CELLS HAVE 1 LARGE CENTRAL VACUOLE AND NOT SEVERAL SMALL ONES LIKE IN AN ANIMAL CELL?

*October 23, 2012*

**Biology**

HOW DOES A CELL WALL HELP WITH “TURGOR PRESSURE?”

*October 23, 2012*

**Biology**

WHAT CELL PART AIDS IN MOVEMENT AND INCREASES THE SURFACE AREA?

*October 23, 2012*

**Biology**

WHAT ORGANELLE WILL BE USED DURING CELLULAR REPRODUCTION TO HELP ANCHOR THE SPINDLE FIBERS?

*October 23, 2012*

**Biology**

Golgi apparatus

*October 23, 2012*

**Biology**

WHAT ORGANELLE AIDS IN TRANSPORTING SUBSTANCES?

*October 23, 2012*

**Biology**

WHAT ORGANELLE IN THE ANIMAL CELL AIDS IN DIGESTING OLDER CELL PARTS AND WASTES?

*October 23, 2012*

**Biology**

WHERE IN AN ANIMAL CELL IS WATER STORED?

*October 23, 2012*

**Math**

From a boat on the lake, the angle of elevation to the top of a cliff is 26°35'. If the base of the cliff is 85 feet from the boat, how high is the cliff (to the nearest foot)? A. 56 feet B. 43 feet C. 53 feet D. 46 feet I HAVE BEEN WORKING ON THIS FOREVER! please help...

*October 23, 2012*

**I.E.D**

sorry it is just... i don't know her

*October 23, 2012*

**I.E.D**

so u want me to FAIL and be a dropout thanks for the inpiration

*October 23, 2012*

**chem 111**

the color change at the endpoint should persist for 30 seconds. explain why the time lapse is a good titration technique.

*October 23, 2012*

**math**

Compute the number of vinyl tiles, measuring 10 in. each side, needed to tile a kitchen measuring 20ft. by 16ft. _____tiles

*October 23, 2012*

**chemistry**

When 1662 J of heat energy is added to 45.9 g of hexane, C6H14, the temperature increases by 16.0 °C. Calculate the molar heat capacity of C6H14.

*October 20, 2012*

**Math (Trig)**

In 1893, the city of Chicago put on a World's Fair to celebrate the 400th anniversary of Columbus' trip to the Americas. The most spectacular at this fair was a huge Ferris Week built by an engineer named George Ferris. This remarkable structure had a diameter of 250 ...

*October 20, 2012*

**Math**

thank you!

*October 19, 2012*

**Math**

I need help understanding truth tables please.

*October 19, 2012*

**math**

The weekly demand for the Pulsar 25 color LED television is represented by p, where p denotes the wholesale unit price in dollars and x denotes the quantity demanded. The weekly total cost function associated with manufacturing the Pulsar 25 is given by C(x), where C(x) ...

*October 19, 2012*

**math**

Middletown to star city is 232 miles. Middletown to Rileyville is 136 miles in the same direction. About how far is it Rileyville to Star city to the nearest hundred? How much difference is there between your estimate and the exact number of miles?

*October 18, 2012*

**Math**

Middletown to star city is 232 miles. Middletown to Rileyville is 136 miles in the same direction. About how far is it Rileyville to Star city to the nearest hundred? How much difference is there between your estimate and the exact number of miles?

*October 18, 2012*

**math**

The correct answer is 56 oz. Because if u divide 9 and 63 it will be 7 then if u multiply 8x7 equals 56oz.

*October 17, 2012*

**Calculus**

use the mean value theorem to find the c's on the open interval (a,b) such that fprime(c)= (f(b)-f(a))/(b-a) f(x)= 3xlog(base 2)x , [1,2]

*October 17, 2012*

**c**

use the mean value theorem to find the c's on the open interval (a,b) such that fprime(c)= (f(b)-f(a))/(b-a) f(x)= 3xlog(base 2)x , [1,2]

*October 17, 2012*

**Physics**

In a Physics laboratory class, an object of mass 2.1 kg, attached by massless strings to two hanging masses, m1= 1.0 kg and m2= 4.0 kg, is free to slide on the surface of the table. the coefficient of kinetic friction between m2 and the table is 0.30. calculate the ...

*October 15, 2012*

**AP Chemistry**

A balloon is filled to a volume of 2.0 102 mL at a temperature of 33.0°C. The balloon is then cooled at constant pressure to a temperature of 1.00 102 K. What is the final volume of the balloon?

*October 15, 2012*

**math**

Use properties of logarithms to expand each logarithmic expression as much as possible. Where possible evaluate logarithmic expsressions without using a calculator. logb x^7

*October 15, 2012*

**Calculus**

Thank you!!

*October 15, 2012*

**Calculus**

yes,i got 7pi/6 and 11pi/6 is that correct?

*October 15, 2012*

**Calculus**

f(theta)= 4sec(theta)+ 2tan(theta), 0 less than theta less than 2pi. find all critical numbers

*October 15, 2012*

**science**

Everywhere on the planet Usually has membranes on the organelles. Known to have a nucleus. Arrived 2.5 billion years ago. Ribosomes are organelles. You need them for your body. Organelles do specific functions. The DNA is wrapped around proteins. Eukaryotes has larger ribosomes

*October 15, 2012*

**Science**

How would you prepare 10 mL of 0.08 M NaCl in sodium acetate buffer? (Stock Sodium acetate buffer: 0.1 M)

*October 14, 2012*

**literature**

In what way does the setting of a small town during the Great Depression impact the characters and plot of "Gumption"? a. The characters can use their wealth to choose among many options for resolving conflicts. b. The characters are unconcerned about the way they ...

*October 12, 2012*

**Math (algebra)**

3$ *

*October 12, 2012*

**Math (algebra)**

I have no idea how to solve this problem... A village wants to build a community center that is projected to cost 1.2 million dollars. Cost per resident is increased by #$ as it is discovered that there are 225 fewer residents than when planning began 2 years ago. What is the ...

*October 12, 2012*

**math**

At a fourth of July sale, Wanda bought a table marked for 30% off. What was the original price if Wanda paid only $84?

*October 10, 2012*

**aglebra**

7 x+16-9x=18-13 x+11 x-2

*October 9, 2012*

**Trig!**

Find the following values for each function. A. f(0) B. f(-1) C. f(-x) D. f(x+1) f(x)=2x^2+3x-4 and f(x)=x^2/x+1

*October 9, 2012*

**Chemistry**

Consider a saturated solution of calcium fluoride in 0.086 M potassium nitrate. Complete the following tasks, and then answer the question. a) Write the chemical equation corresponding to Ksp. b) Write the defining expression for the thermodynamic solubility product constant, ...

*October 7, 2012*

**science**

A prisoner that is funny would be what periodic table element?

*October 5, 2012*

**Precalculus**

A direction of S 23 degree W is the same as which of the following in air navigation? Please let me know how you did it. Thank you!

*October 4, 2012*

**business english**

which of the following would not be considered a violation of a convention? A) Abusiness letter is hand written B) A resume is present in an electronic format. C) Clipart is included throughout a loan contract. D) An attorney's business card is printed in red font on a ...

*October 3, 2012*

**Math**

If I have the inputs 1 2 3 4 and 5 and my outputs are 1 4 9 16 and 25 what is the output

*October 2, 2012*

**chemistry**

Calculate ΔG at 25°C for the precipitation of lead(II) chloride from mixing 100. mL of 0.025 M lead(II) nitrate solution with 100. mL of 0.15 M sodium chloride solution. The ΔG° for the reaction at 25°C = −27.36 kJ/mol. (Hint: write out reaction ...

*October 2, 2012*

**statistics**

4. A college student is interested in whether there is a difference between male and female students in the amount of time spent studying each week. The student gathers information from a random sample of male and female students on campus. Amount of time spent studying is ...

*October 1, 2012*

**statistics**

4. A college student is interested in whether there is a difference between male and female students in the amount of time spent studying each week. The student gathers information from a random sample of male and female students on campus. Amount of time spent studying is ...

*October 1, 2012*

**Calculus**

where did you get y^2 -1 from? Did you subtract y^2 from the right side? if so where did the -1 come from?

*October 1, 2012*

**Calculus**

how did you know it was + or - l? I got what x equals but I was confused on how to find the y values?

*October 1, 2012*

**Calculus**

determine the point(s)at which the graph of y^4 = y^2 -x^2 has a horizontal tangent.

*October 1, 2012*

**ECO 372**

How does a stimulus program (through the money multiplier) affect the money supply?

*September 28, 2012*

**Physics science**

Dana and Gina are pushing on a box. Dana pushes with 250 N of force and Gina pushes with 100 N of force. A. What is the net force if tey both push the box in the same direction. B. what is the net force if they push in the opposite directions?

*September 27, 2012*

**organic chemistry**

Why is steam distillation rather than a simple distillation used to isolate eugenol? My answer is because the temperature goes nowhere near their boiling points, which minimises the risk of decompostion. Is it that right? If not then don't you mind if you can explain to me...

*September 26, 2012*

**College Physics**

Vector subtraction (F1 - F2) is a special case of vector addition, since F1- F2 = F1 + (-F2). Use the data (magnitude and direction) of F1 and F2 obtained in measurement 1 to find out the magnitude and direction of the resultant vector of F1 - F2. The data is: F1: 200g and 30...

*September 26, 2012*

**english**

our cat

*September 26, 2012*

**chemistry**

you are supposed to chose the answer (1-6) that best finishes the beginning sentence

*September 19, 2012*

**math**

The 1/2 should be 1/3, sorry

*September 19, 2012*

**math**

Average rate of change: h(x)= x^3 -0.5e^x at [0,1]

*September 19, 2012*

**college physics**

What is the kinetic energy of a 25 kg dog that is running at a speed of 8.9 m/s (about 20 mi/h)?

*September 19, 2012*

**physics**

How much work does gravity do on a 0.120-kg ball falling from a height of 17.0 m?

*September 19, 2012*

**Math**

The answer is 7 because 23-7=16

*September 18, 2012*

**Math**

the answer is 7 because 23-7=16

*September 18, 2012*

**Probability and statistics**

3.75

*September 18, 2012*

**Physics**

A small fish is dropped by a pelican that is rising steadily at 0.52 m/s(b) How far below the pelican is the fish after 2.4 s?

*September 17, 2012*

**math**

A kayak moves at a rate of 12 mph in still water. If the rivers current flows at a rate of 5mph how long does it take the boat to travel 23 miles upstream?

*September 16, 2012*

**Physics**

A large kite of mass 3 kg is flying through the air on a windy day. Currently, the tension from the string on the kite has a magnitude of 7.7 N at an angle of θ = 33.5 degrees. The current acceleration of the kite has a magnitude of a = 7.56 m/s2 at an angle of φ = ...

*September 16, 2012*

**circles**

if spoke of the ferris wheel is 20 feet long what is the circumference

*September 16, 2012*

**circles**

if the distance around the soccer ball is 30 inches what is the radius

*September 16, 2012*

**us history**

ok thank you Ms. Sue

*September 15, 2012*

**us history**

I planned on answering it by saying that the statement wasn't very accurate because it says a single American society, even then a southern Farmer wouldn't be the same as a New Englander due to slavery, differant religions, agriculteral and industry progression, labor ...

*September 15, 2012*

**us history**

i really need help with my thesis statement.... A society is characterized by similar values, shared institutions, and a common culture. Consider the following question: To what extent would it be accurate to say that the New England, Middle and Southern colonies had merged to...

*September 15, 2012*

**economics**

the currency in Great Britain is pound and the price of a particular British car is 12,000. suppose the exchange rate is 0.67 per dollar. what iis the price of the British car in United States dollars?

*September 14, 2012*

**Physics**

A two-stage rocket is launched straight up from rest. It accelerates at 26.4 m/s/s for 3.92 seconds during the first stage. It accelerates at 12.3 m/s/s for 4.48 more seconds during the second stage. After second stage burnout the rocket comes under the influence of gravity ...

*September 12, 2012*

**Physics**

Part 1: Two balls (Ball 1 and Ball 2) are released from the top of a tower. Ball 2 is thrown 3.14 seconds after Ball 1 is dropped. Ball 2 is thrown downward with a velocity of 3.49 m/s. Determine how far apart Ball 1 and Ball 2 are after 5.02 seconds from when Ball 1 was ...

*September 12, 2012*

**Physics**

Part 1: Two balls (Ball 1 and Ball 2) are released from the top of a tower. Ball 2 is thrown 3.14 seconds after Ball 1 is dropped. Ball 2 is thrown downward with a velocity of 3.49 m/s. Determine how far apart Ball 1 and Ball 2 are after 5.02 seconds from when Ball 1 was ...

*September 12, 2012*

**Physics**

Two balls (Ball 1 and Ball 2) are released from the top of a tower. Ball 2 is thrown 3.14 seconds after Ball 1 is dropped. Ball 2 is thrown downward with a velocity of 3.49 m/s. Determine how far Ball 1 has fallen (to two decimal points) by the time Ball 2 is thrown.

*September 12, 2012*

**physics**

Emily takes a trip, driving with a constant velocity of 89.5 km/h to the north except for a 22 min rest stop. If Emily's average velocity is 70.8 km/h to the north, how long does the trip take?

*September 12, 2012*

**Calculus**

what is the limit of g(theta)= tan(4theta)/4theta.

*September 12, 2012*

**Calculus**

Find if there are any vertical asymptotes: g(theta)= (tan4theta)/(4theta)

*September 11, 2012*

**physics**

A swimmer heads directly across a river, swimming at 1.10 m/s relative to the water. She arrives at a point 52.0 m downstream from the point directly across the river, 72.0 m wide. What is the speed of the river current? What is the swimmer's speed relative to the shore? ...

*September 11, 2012*

**Organic Physiological Chemistry**

draw each of the following compounds using condensed formulas: a) 3,3,5-trimethyl-1-hexene b) 1-bromo-3-chloro-1-heptyne c) 3-heptyne Not sure if I am doing this right, but for a) i put CH3C(CH3)2CH=CH3

*September 11, 2012*

**Chemistry**

I believe you would subtract the dry weight of the alum from the wet alum weight, then divide that answer by the original weight of wet alum: 13.44g(wet) - 11.28g (dry) = 2.16g of water that was lost. 2.16g H20/ 13.44g wet alum =0.1607 X 100 = 16.07% H20 lost Hope this helps :)

*September 11, 2012*

**math**

plug in 4 for x. y=16

*September 10, 2012*

**Calculus**

the limit as x approaches 3 from the right of ln(x^2 -9). what is the limit, if it exist?

*September 10, 2012*

**MATH**

(-5)^4 should be (-5)*(-5)*(-5)*(-5) for -(10)^2 was the negitive attached to the ten if so its (-10)*(-10) if not then its (10)*(10)*(-1)

*September 8, 2012*

**Calculus**

What x-values make f not continuous f(x)= x/(x^2 -3)

*September 8, 2012*

**math**

y=-.5 x=-5/2

*September 8, 2012*

**Calculus**

Find the constants a and b such that the function is continuous on the entire line f(x){7, x is less than or equal to -3 ax+b, -3 is less than x is greater than 4 -7, x is less than or equal to 4

*September 8, 2012*

**powers of exponents math**

0k, d) -8, f)-16

*September 8, 2012*