Questions Asked on
November 29, 2013

phy
A slab of ice floats on a freshwater lake. What minimum volume must the slab have for a 50.0kg woman to be able to stand on it without getting her feet wet?
asked by shree 
Study Unit:Main Ideas
(1) Do you enjoy being out in the fresh air? (2) Does nature restore your spirits? (3) You might want to consider hiking as a hobby. (4) It's a hobby you can begin with very little expense. (5) All you need to start is a good pair of hiking shoes. The
asked by Beatrice 
physics
you and a flight attendant toss a ball back and forth in an airplane in flight. Does the kinetic energy of the ball depend on the speed of the airplane? Defend you answer.
asked by princess 
Solar Energy please help
Solar simulators are used to study the performance of solar cells in the lab. In the figure below (left picture), the spectral power density of a solar simulator is shown with the blue line. The spectral power density of this solar simulator is given by:
asked by UNO 
math
The profit p(x) of a cosmetics company in thousands of dollars is given by P(x) = 5x^2 + 400x  2550, where x is the amount spent on advertising, in thousands of dollars. What amount must be spent on advertising to obtain a profit of at least $4 000 000?
asked by Kp 
Chemistry
Determine The Mole Fraction Of Substances In Solution Containing 36g of water and 46g of glaycerine C3H5(OH)3.
asked by Biruk Wonbera 
Solar energy please help
1Consider an organic solar cell consisting of a TiO2 semiconductor with an ionization energy 7.8eV and a polymer with an electron affinity 3.4eV. Which of the followning band diagrams corresponds to the organic solar cell. The band gap of TiO2 is 3.5eV.
asked by UNO 
physicsmagnets
An infinitely long wire carrying a current of 2 A is bent at a right angle as shown in the Figure. What is the magnetic field a point P, 10 cm from the corner?
asked by LH need help please 
algebra 1
Ashley is the manager of a theater. She has $240 to spend on posters to advertise a new play. If she buys small posters only, Ashley can print 48 posters for $240. If she buys large posters only, Ashley can print 30 posters for $240. A. Write an equation
asked by nick 
physics
John and Barry are pulling on a fence post with ropes while their friend Pat uses a chainsaw to sheer it at groundlevel. John applies a force of 75.0N [40*] on one rope while Barry applies a force of 85.0N [340*] on the other rope. What is the net force
asked by khklhkjh 
math
A rubber ball is dropped from a height of 729 feet, and at each bounce it rebounds onethird of the height from which it last fell. How far has the ball travelled by the time it strikes the ground for the 5th time?
asked by Jasen 
math
You have a 20foot ladder that you are using as you paint your house. You place the ladder so that it forms an angle of 30 at the point of contact between the ladder and the ground. How high will the top of the ladder be above the ground? Please explain.
asked by lizziE 
Chemistry
The specific heat of solid gold is 0.13 J/g • °C. How much heat is needed to raise the temperature of 25.0 g of gold from 23°C to its melting point at 1063°C?
asked by Rae 
Math
If cost = 0.42 and cosw = 0.80, both t and w are positive, and the angles determined by t and w are in quadrant 3, then which of the following statements is true? Here is my answer (B).... a. t > w B. w > t(X) c. Cannot be determined please explain why I
asked by lizzie1230 
statistics
In a distribution of sentence lengths in months like the following: 6, 12, 10, 18, 24, 360; which statistic would a researcher not want to report? a. standard deviation b. mean c. range d. raw numbers
asked by Jim 
Cynthia
Which of the statements below correctly compares features of plant and animal cells? Plant cells have a cell membrane, while animal cells have both a cell wall and a cell membrane. Plant cells have ribosomes only on the rough ER, while animal cells have
asked by Biology 
English
This is what I think they are 1."Leaving their native land to colonize in America," they expected to land in the colony of Virginia. A.prepositional phrase B. appositive phrase c.participial phrase d.gerund phrase e.infinitive phrase f.absolute phrase
asked by Trex 
Math
A man started to work in 1985 at an annual salary of \$8{,}000. He received a $600 raise each year. How much was his salary in 2012? Salary:
asked by Angela 
physics
you and a flight attendant toss a ball back and forth in an airplane in flight. Does the kinetic energy of the ball depend on the speed of the airplane? Defend you answer.
asked by princess 
math
a rock is thrown straight up in the air from an initial height of ho, in metres, with the initial velocity vo, in metres per second. The height in metres above the ground after t seconds is given by h(t) = 4.9t^2 + vo + ho. Find an expression for the time
asked by Kp 
math
Resource allocation podunk institute of technology’s math deaprtment offers two cources: finite math and applied calculus.each section of finite math has 60 studnets, and each section of applied calculus has 50. The department is allowed to offer a total
asked by Swayne 
Geometry
True or False: If a figure does not have point symmetry, it cannot have reflection symmetry.
asked by Jack 
English
Are these right "Stamp collecting" is fun for children and adults alike. (Subject) Which "of my stamps" do I like most? (Adverb) Collectors "engaging in their hobbies" are never bored. (Adjective) Many residents of Hawaii work in "fishing" and "weaving".
asked by Aron 
PHYSICS
a) What is the maximum current in a 4.00 µF capacitor when it is connected across a North American electrical outlet having ΔVrms = 120 V, f = 60.0 Hz? mA (b) What is the maximum current when it is connected across a European electrical outlet having
asked by Cassandra 
Math
A swing has a maximum height of 2 m and a minimum height of 0.5 m and it takes 3 seconds to get from the maximum height to the minimum height. Approximate the instantaneous rate of change 1 second into the fall using the difference quotient when h is 0.01.
asked by Veronica 
math
A statistic professor plans classes so carefully that the lengths of her classes are uniformly distributed between 46.0 and 56.0 minutes. Find the probability that a given class period time is less than 51.75 minutes
asked by jamie 
physics
A loaded sled is pulled by means of a rope that makes an angle of 45.0° with the horizontal. If the mass of the sled is 60.0 kg and the coefficient of friction is 0.020, how much work is done in pulling the sled for a distance of 1.000 km?
asked by NG 
Help
As a project for her early childhood education class, Pauline designs a sample development checklists for gross motor skills for four years old. Pauline should included all but one of the following on her developmental checklists. Which shoudl she not
asked by Jasmine 
Social Science
Discuss how the recent PATRIOT Act may advance various forms of collective behavior among groups within the United States. 2. Discuss the reasons for resistance to social change. 3. Describe the political, social, and ideological reasons behind the Defense
asked by Dawid 
Math
I forgot to post the rest. Sorry. It is the same thing as the first one, but I do not understand why my answer is wrong on all of them. 16. If sint = 0.29 and sinw = 0.43, both t and w are positive, and the angles determind by t and w are in quadrant 2,
asked by lizzie1230 
us hist
As a result of the Emancipation Proclamation, A) Democrats made significant political gains in the Northwest by capitalizing on voters' racist fears. B) Republican politicians vigorously defended the cause of racial justice and black equality. C) the
asked by joe 
Probability and Statistics
The proportion of adults living in a small town who are college graduates is estimated to be p = 0.6. To test this hypothesis, a random sample of 15 adults is selected. If the number of college graduates in the sample is anywhere from 6 to 12, we shall not
asked by Katy 
math 4 grade
A group of four friends went out for dinner. Their subtotal for their meal came out to $156. While waiting for the bill to come they tried to figure out how much the tax would be if they know the local tax is 8%. They also know they want to leave a 15% tip
asked by eduarda 
History
In Jefferson’s view, George Washington’s action in addressing the Whiskey Rebellion A. was appropriate but not sufficiently bold. B. amounted to an inappropriate overreaction. C. Wouldn’t have been necessary save for the influence of Republican Clubs
asked by Jen 
us hist
Andrew Johnson’s fundamental goal was to A) guarantee black political rights. B) preserve the economic power of the southern planters. C) fund public education for blacks. D) assist poor whites with free homesteads and public education. Is D Correct?
asked by joe 
MTH STAT 201
Can someone please help how to solve this I keep getting the wrong answer so I am now freaking out and clueless 23) The following data show the average retirement ages for a random sample of workers in Boscov’s and a random sample of workers in ShopRite.
asked by Lea 
magnetism
Two long, parallel wires carry current in the xy plane. One wire carries 30 A to the left along the xaxis. The other carries 50 A to the right along a parallel line at y = 0.28 m. At what yaxis position in meters is the magnetic field equal to zero?
asked by anton URGENT Please 
Help!!!
Instead of toilet training her son at 18 months of age as her mother recommends, Melissa is waiting until her son is emotionally ready to begin toilet learning. How will melissa know when her son is emotionally ready??? (A) He'll be able to hold on for a
asked by Jasmine 
Geometry
You use a copy machine to enlarge an 8” 11” document, and you choose the 136 % enlargement setting. What will be the dimensions of the enlarged document? Round to the nearest hundredth of an inch.
asked by Sam 
science
Which of the following most likely caused the rapid change of the mountain? a.landslide b.snowfall. c.wind erosion. d.volcanic eruption. My answer is (b)
asked by ezekiel 
math ergent please please...
10.a)Solve the inequality x^35x^2+2x+8
asked by kavi 
math
show that the equation x^315x+c=0 has at most one root on the interval [2,2.
asked by Bobby 
Chemistry
Weak polyprotic acids are normally added to Coca Cola to lower its pH to about 2.5 and impart tartness? Show that a two litter cocacola bottled drink that contains 0.057 to 0.084 percent of 75 percent of phosphoric acid by mass,meets this ph requirement.
asked by Daniel 
Health (Ms. Sue)
1. What are two ways that society could deal with future concerns about genetic information? A: ? 2. Imagine you are a scientist working on the Human Genome Project. What would you say to news reports about your research? A: ?
asked by Anonymous 
Solar
Greeting All, please assist with the below. Thanks. The spectral power density of a solar simulator is given by: P(λ)=7.5∗1015λ−2.25∗109 [Wm^2m^1] for 300nm
asked by Anon 
physics
A square loop of side "a" carries current "I". It creates a magnetic field "Bsquare" at its center. The same loop is then reshaped into a circle, which lowers the magnetic field "Bcircle" at the center. What is the ratio Bsquare/Bcircle?
asked by James help 
Physics Solinoid
Imagine you shoot an electron beam down the center of an ideal solenoid carrying current I. Which of the following will happen? a)magnitude of the field outside the solenoid will increase. B) The magnitude of the field outside the solenoid will decrease.
asked by Anton Help 
English
What kind of sentences are they and how do I diagram them? Large brains "do" not necessarily "confer" superior intelligence. I ordered materials to use in the craft school "from a supplier" in Minnesota. "This done," I outlined lesson plans for my craft
asked by Joy 
Chemistry
Weak polyprotic acids are normally added to Coca Cola to lower its pH to about 2.5 and impart tartness? Show that a two litter cocacola bottled drink that contains 0.057 to 0.084 percent of 75 percent of phosphoric acid by mass,meets this ph requirement.
asked by Daniel 
Precal
Find all values of x such that x6, x+6, and 10 x 6 form a geometric sequence. Give your answers in increasing order
asked by Teagan 
math
Explain how to find the restrictions on the domain of a reciprocal function. (please explain it clearly) thank you!
asked by Paran 
evolution article. Please help!!!
Hi , I am having a very difficult time finding an article that contains a misconception about evolution . The article had to be be published within in this past year. Please help !!! thank you!!
asked by joey 
Statistics
I have two coins: a quarter and a nickel. The quarter has a bias of 1/4 for heads, and the nickel has a bias of 2/3 for heads. I flip each coin 10 times. What is the probability that I observe exactly five heads total? Some explanation of the solution
asked by Ben 
biology
in what aspects are DNA and RNA polymerases similar?
asked by Anonymous 
Electrical Engineering
Winter is coming, so I want to make a 1500 W heating coil which will plug into a 120 V wall outlet. The coil will have a cross sectional area of 0.01 cm2 and a length (when fully unwound) of 5 m. Determine the resistivity of the coil required, in Ωcm:
asked by Lauren 
MATH
A man started to work in 1985 at an annual salary of $8,000. He received a $600 raise each year. How much was his salary in 2012?
asked by Angela 
Philosophy
Can we attain certainty about our beliefs about reality? If so, how? If not, why not? Be sure to define certainty carefully. This is not psychological certainty (feeling ‘sure’) but logical certainty: knowing and being able to prove that you cannot be
asked by Dawid 
physics
An inductor (L = 405 mH), a capacitor (C = 4.43 µF), and a resistor (R = 400 ) are connected in series. A 50.0 Hz AC generator produces a peak current of 250 mA in the circuit. (a) Calculate the required peak voltage ΔVmax. V (b) Determine the phase
asked by MR. GEE 
Chemistry
Determine The Mole Fraction Of Substances In Solution Containing 36g of water and 46g of glaycerine C3H5(OH)3.
asked by Biruk Wonbera 
English (grammar)
Is this statement correct? "Helping other people contributes to your being a great leader." I'm not really sure with the phrase 'to your being'. It sounds incorrect but I'm not really sure. If it's incorrect, how do I rephrase the sentence?
asked by Nina 
Math
P(x) = (2x^3+x^218x9)/(x^2x6) 1.Find any holes in the graph of P(x) 2.Find any horizontal or oblique asymptote 3.Determine where it crosses the horizontal/oblique asymptote (if it does)
asked by Jon 
information technology
How does the organizational strategy drive the IT strategy?
asked by paula 
Civics
why are our rights such as freedom of speech not unlimited?
asked by Carley 
math
Explain how to find the equation of the vertical asymptotes of a reciprocal function in full details.
asked by Thaya 
math ergent please
The reciprocal of a linear function and a quadratic function have the same horizontal asymptote.what is its equation?
asked by Thaya 
Civics the right question
2. What have been the effects of a society that offers protections to those accused of crimes/wrongdoing?
asked by Carley 
Statistics
Hello, my problem is I have a random sample of only 15 sales average is $115 with a known population standard deviation of $25.00. Obtain a 92% confidence interval and explain what your answer means. I am not sure what to do because the sample size is only
asked by kim 
math
an = 3 a_{n1}  5 a_{n2}  4 a_{n3} and a_4 = 42, a_5 = 147, and a_6 = 219. Find a_1, a_2, and a_3.
asked by Denzel 
English
Many events take place on the island but everyone feels guilty and sorry for their actions in the end and they head back to Italy, Milan safely all thanks to Prospero's spirit, Ariel. Ariel is a spirit who used to be a slave of Sycorax, an evil witch.
asked by rfvv 
Trigonometry
If Cot θ = Square Root of 15/7, use the fundamental identities to find Cosθ > 0.
asked by Dave 
PreCal
I'm suppose to solve log(3)27=x I get 3^x=27 I can't go any father correct?
asked by Terri 
math
Give the three general forms for: a) the reciprocal of a linear function b) the reciprocal of a quadratic function c) a rational function Please give me in a full details for each please...
asked by Paran 
Civics...a few more questions
What have been the effects of a society that allows the freedoms listed in the 1st Amendment?
asked by Carley 
Math
What would 64x6^4 equal in simplest form? Please show your work.
asked by Nicole 
algebra 1
The table that follows shows the relationship between the boiling temperature of water (°F) and the altitude (per thousand feet): Boiling Point of Water Altitude (1000 ft.) Temperature (°F) 8 197.6 4.5 203.9 3 206.6 2.5 207.5 Gemma and Tessa need to find
asked by nick 
history
the ____ act required king______ 1 to convene parliament every three years. is it parliament,king charles?
asked by kristin 
Civics
what is the purpose (intended effect) of the rule of law
asked by Carley 
hummanites
What trend contributed to the nomadic lifestyle of the gulf cultures? A.trade with buffalo hunters B.arrival of apache in the south of Texas C.marshy land along the coast made farming difficult D.reintroduction of the horse by the Spanish
asked by sela 
Precal
Find x such that 8 x  3, 3 x  1, and 2 x + 49 are consecutive terms of an arithmetic sequence. x=?
asked by Teagan 
Precal
find the minor axis 1x^2+36y^2=1
asked by Teagan 
Physical Chemistry
A pharmaceutical preparation of pH 6.2 is preserved with substance A (pKa 8.5). If the preservative effect is due to the undissociated molecule determine the per cent of active preservative present in the preparation. Thanks! :)
asked by Matthias 
College alerbra
solve the exponential equation. 4^(x+2)=9x
asked by cain 
history
trouser wearing members of a revolutionary uprising of the french working class were called the___________?
asked by kristin 
Law
Research and identify a labor law that is specific to your state. Share a brief summary of the law with us and discuss why you believe this law is or is not important to the employeremployee relationship.
asked by Mattiazz 
math
whats the derivative of lnx?
asked by Bobby 
math
Consider the following hypothesis statement using alpha = .05, and data from two independent samples: Ho: µ1  µ2 = 0 Ha: µ1  µ2 not equal to 0 X1 = 237, X2 = 218 ¬1 = 54, ¬2 = 63 n1 = 42, n2 = 35 a) Calculate the appropriate test statistic and
asked by Lea 
English
Can someone check my sentences? They are really urgent. Thank you in advance. 1) The Reformation was caused by the refusal of Pope Clement VI to declare invalid Henry VIII's marriage to Catherine of Aragon. 2)Elizabeth I continued her father's policy. She
asked by Franco 
College
7x+6=x30
asked by Hannah 
alebraga
7x+3=3x+4
asked by Hannah