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2011
April

Questions Asked on April 5, 2011

a) If a photon and an electron each have the same energy of 20.0 eV, find the wavelength of each.b) If a photon and an electron
1. 1 answer
2. asked by Jennifer
3. 2,962 views
write a decimal and 45/90 in simplest form
1. 3 answers
2. asked by megajolt
3. 219 views
A sample of 70 night-school students' ages is obtained in order to estimate the mean age of night-school students. x = 24 years.
1. 1 answer
2. asked by Brenda
3. 611 views
how many moles of N2 (g) re present in 1.00 of N2 (g) at 100 c and 1 atm?
1. 1 answer
2. asked by heather
3. 769 views
write the related addition statement 8-3=5
1. 1 answer
2. asked by alma
3. 323 views
How fast should a 58.1g tennis ball travel to have a de Broglie wavelength that is equal to that of a photon of green light
1. 1 answer
2. asked by Josh
3. 1,524 views
The velocity in the table is increasing, . Find an upper estimate for the total distance traveled using(a) n=4 (b) n=2 Which of
1. 1 answer
2. asked by Anonymous
3. 554 views
culture of comsumption during the eisenhower administration
1. 1 answer
2. asked by maxcine
3. 355 views
find the slope of the tangent liney= -5x^1/2 + X^3/2; X=25
1. 1 answer
2. asked by Lu
3. 960 views
1. You read the following information about the economy:Real GDP up three percent from a year ago. Unemployment rate of 6.1
1. 1 answer
2. asked by Jen
3. 798 views
why is yeast used in the experiment of respiration?
1. 0 answers
2. asked by vivian
3. 407 views
How do you calculate the volumes of the acid solutions (1.50M HCl, 1.50M HNO3, and 1.50 M H2SO4?
1. 3 answers
2. asked by Katie
3. 478 views
Which is NOT a way in which the Canadian government attempted to cooperate with French separatists?
1. 5 answers
2. asked by Elizabeth
3. 426 views
what is the main idea for Joule and give a detail to it and an example. Also for calorie, kilocalorie and caloric values.... I
1. 0 answers
2. asked by nin
3. 496 views
The average score on a particular exam is determined to be 84.35 with a standard deviation of 7.4. Assume the scores are
1. 1 answer
2. asked by Anonymous
3. 497 views
The steering wheel of a car has a radius of 0.18 m, while the steering wheel of a truck has a radius of 0.25 m. The same force
1. 1 answer
2. asked by Anonymous
3. 3,152 views
Please help me identify the adjectives and adverbs in this: My experiences with credit and credit card started at age 18. I had
1. 1 answer
2. asked by marie
3. 639 views
new computer viruses and other types of malware are released all the time. Identify a current virus or worm (most security
1. 3 answers
2. asked by erianne
3. 812 views
In a hydrogen atom, from what energy level must an electron fall to the n=3 level to give a line at 1.28 um (micrometers) in the
1. 1 answer
2. asked by Kamila
3. 1,225 views
Assuming standard pressure, at what temperature is there an equilibrium between water vapor and liquid water?
1. 1 answer
2. asked by mike
3. 902 views
What is the structure and language of the poem Young by Anne Sexton?
1. 3 answers
2. asked by jasmine
3. 657 views
If gas cost $3.69 per gallon and I travel 125 miles how much will it cost me total?
1. 1 answer
2. asked by Rebecca walter
3. 457 views
i need a persuasive essay on why the cotton production was dependent upon slave trade in the 1800s
1. 1 answer
2. asked by taylor
3. 398 views
the temperature of water in a 100 mL container was raised from 26.7 degrees C to 62.3 degrees C. how much heat in calories was
1. 3 answers
2. asked by jessica
3. 435 views
x squared-4x-5 your factoring each expression.
1. 1 answer
2. asked by britt
3. 351 views
How do you label a Tectonic Map of Hypothetical Ocean Basin? I have to draw in the plate boundaries.
1. 1 answer
2. asked by Chaseone
3. 1,203 views
A 0.55-kg mass is suspended from a string, forming a pendulum. The period of this pendulum is 1.2 s when the amplitude is 2.2
1. 1 answer
2. asked by John
3. 514 views
The displacement of an object in SHM is given by y(t) = (7.0 cm)sin[(1.58 rad/s)t]. What is the frequency of the oscillations?
1. 2 answers
2. asked by John
3. 422 views
A sewing machine needle moves with a rapid vibratory motion, rather like SHM, as it sews a seam. Suppose the needle moves 8.4 mm
1. 0 answers
2. asked by John
3. 807 views
Ben can complete 4 math problems in 20 minutes. If he continues working at the same rate, how long will it take Ben to complete
1. 2 answers
2. asked by HELP
3. 543 views
6x^2+9cx= 6c^2 I tried moving the 6c^2 to the other side of the equation, then factoring (36) to arrive at (6x^2+12cx)
1. 0 answers
2. asked by Alex
3. 295 views
a)For the titration of an acid analyte with a NaOH titrant, a phenolphthalein endpoint will change from colorless to pink. If
1. 3 answers
2. asked by Alix
3. 1,981 views
Hello,I have a probability problem on combination that is not easy to solve for me, and I need help. Thank you. Probleme:
1. 3 answers
2. asked by bikie
3. 858 views
The correct electron configuration for the ion formed by sodium when producing an ionic compound with chlorine
1. 2 answers
2. asked by Anonymous
3. 1,083 views
I have to write a sentence saying that I feel like doing some activity say playing baseball of football-it doesn't matter. We
1. 3 answers
2. asked by Ellie
3. 891 views
how do you find PH of 0.010 M HNO3 solution?
1. 2 answers
2. asked by Courtney
3. 1,929 views
what is the concentration, in % m/m of a solution prepared from 50.0g sodium chloride and 150.0g of water
1. 1 answer
2. asked by tim
3. 436 views
The useful power output of Bryan Allen, who flew a human-powered airplane across the English Channel on June 12th, 1979, was
1. 2 answers
2. asked by Seth
3. 627 views
My instructions are to type 200 to 225 words of a short presentation on a topic of my choosing.I was wondering if you could
1. 3 answers
2. asked by Danielle
3. 475 views
An inchworm crawls 10mm every minute.How doe he crawls in15min.
1. 1 answer
2. asked by allen lews
3. 398 views
Solve the recurrence relation a_n = -6a_n - 1 + 7a_n-2, n ≥ 2, given a₀ = 32, a₁ = -17.This is what I have figured out so
1. 20 answers
2. asked by Francesca
3. 1,423 views
Let R be the plane region bounded by x=1, x=5, the x-axis and y=1/x. Approximate the are of R using 8 right rectangles.
1. 0 answers
2. asked by Kelly
3. 328 views
How can you tell if a molecule is polar or non-polar
1. 1 answer
2. asked by Mm
3. 373 views
You look up and see a helicopter pass directly overhead: 3.10-s later you hear the sound of the engines. If the air temperature
1. 3 answers
2. asked by Matt
3. 1,875 views
what are the relative strengths of the different intermolecular forces?
1. 1 answer
2. asked by Mm
3. 984 views
What physical properties can you use to verify the identity of a compound?
1. 2 answers
2. asked by Mm
3. 809 views
what tests can be run to identify the cation and anion of an ionic compound?
1. 2 answers
2. asked by Mm
3. 632 views
You are viewing a New Year's Day fireworks display at a distance of 1500 m. It is 4.0°C. How long does it take the sound of the
1. 2 answers
2. asked by sabeen
3. 701 views
The highest natural atmospheric temperature ever recorded on Earth was 58°C (136°F), at El Azizia, Libya on September 13,
1. 0 answers
2. asked by rameez
3. 694 views
what intermolecular forces are present in each: Potassium nitrate, Naphthalene, and benzoic Acid?
1. 0 answers
2. asked by Mm
3. 911 views
You are standing 7.0 meters from a sound source that radiates equally in all directions, but it is too loud for you. How far
1. 2 answers
2. asked by anjumk
3. 562 views
I still have a few doubts on school rules.I hope you can have a look at them. It's urgent. 1)You mustn't dirnk or eat during
1. 1 answer
2. asked by Mike
3. 562 views
15.0 meters from a sound source that radiates freely in all directions, the intensity is 0.000550 W/m2. What is the rate at
1. 0 answers
2. asked by tariq m
3. 413 views
unscramble hcssakiggdooeeep to make three words. --- ------ -------
1. 0 answers
2. asked by michael
3. 427 views
The human eardrum has an area of 5.0×10–5 m2. (a) What is the sound power received when the incident intensity is the minimum
1. 0 answers
2. asked by janine ricca
3. 752 views
A grade-school teacher insists that the the overall sound level in his classroom not exceed 64 dB at his location. There are 25
1. 1 answer
2. asked by chris giordano
3. 1,128 views
In this equilibrium H2(g) + I2(g) <-> 2 HI(g).What is happening on the molecular level? Like given the right energy when a H2
1. 1 answer
2. asked by Sarah
3. 481 views
Jane and Sam alternately pound a railroad spike into a tie with their hammers. The crew chief has a migraine, and notes that
1. 1 answer
2. asked by shanelle james
3. 499 views
The sound of heavy automobile traffic, heard at a certain distance, has a sound level of about 75 dB. What is the intensity of
1. 1 answer
2. asked by kait morgan
3. 526 views
Sound spreads radially in all directions from a source with power 15.3 W. If the intensity you experience is 3.00×10−6 W/m2,
1. 1 answer
2. asked by diane bavier
3. 449 views
A bungee jumper makes a jump into the Gorge du Verdon in southern France from a platform 182 m above the bottom of the gorge.
1. 2 answers
2. asked by Meisha
3. 1,412 views
How many ways can a teacher arrange 10 students in a front row if there are 60 studentsI think I do 60!/50! = 2.74 *10^17 How
1. 1 answer
2. asked by Katie L.
3. 570 views
what is the prime factorization of 24?f.)8x3 g.)4x3x2 h.)2x2x2x3 j.)2x3x2
1. 4 answers
2. asked by megajolt
3. 326 views
when do you normally find information for topics that interest you? how do you know when sources are reliable.
1. 5 answers
2. asked by l
3. 489 views
HOW MANY MEN WERE IN CONGRESS IN 2005
1. 1 answer
2. asked by KALEIGH
3. 882 views
What is the best definition for a paragraph's topic sentence?
1. 2 answers
2. asked by joaquin
3. 859 views
If cot(a)=3 and sin(b)= (15/17) where a being alpha lies in quadrant 3 and b being beta lies in quadrant 2, what is the exact
1. 0 answers
2. asked by Kibrya
3. 579 views
A rectangle is 3 times as long as it is wide, it's area is 108 square centimeters. What is the length? what is the width?
1. 2 answers
2. asked by daniel
3. 2,868 views
Shawna thinks that 8x2=17. what number pattern shows that she not correct?
1. 1 answer
2. asked by tom
3. 387 views
What substance is produced at the cathode during the electrolysis of molten calcium bromide, CaBr2? Assume standard conditions.
1. 1 answer
2. asked by sam
3. 3,223 views
I am writing a report on greenhouse gases. Most of it is very depressing about how greenhouse gas emissions have increased over
1. 0 answers
2. asked by Regina
3. 534 views
what are 3 criteria used to evaluate taxes?
1. 2 answers
2. asked by abbey road
3. 410 views
The math team spent $10 for the cake mixes and $4 for the cupcake paperliners. They sold 78 cupcakes at .75 each. What
1. 1 answer
2. asked by Jackiee
3. 480 views
The following questions refer to the following system: 500 mL of 0.02 M Mn(NO3)2 are mixed with 1.0 L of 1.0 M Na2C2O4. The
1. 2 answers
2. asked by Susu
3. 1,179 views
Calculate the frequency in hertz and cm-1, as well as the energy in joules and electron volts of an x-ray photon with a
1. 1 answer
2. asked by hope
3. 538 views
Solve for x:2 to x+1=x+2 to 3 or 2 to x+3= x+2 to x+5 (the proportions end up being the same in the end) I keep getting to the
1. 1 answer
2. asked by Lily
3. 347 views
my daughter came home with input/output table don't understand how to do itInput Output 4 33 5 36 11 54 16 69
1. 2 answers
2. asked by Andrea
3. 294 views
can you figure out this problem?10c+c(c-4)
1. 1 answer
2. asked by Sara
3. 350 views
there are 3 games on tv in the afternoon on saturday and 4 games on tv in the night on saturday. There are 5 different games on
1. 2 answers
2. asked by pammy
3. 959 views
For many years the top-selling luxury car in North America was the Cadillac. It reigned from 1950 to 1998. In 2000, Cadillac
1. 1 answer
2. asked by oscar
3. 481 views
solve this linear programming problem;A chain saw requires 4 hours of assembly and a wood chipper 6 hours. A maximum of 48 hours
1. 2 answers
2. asked by ash
3. 1,211 views
1.62 g of CoCl2 x (xH20) were heated. After heating only .88g of CoCl2 remained. What was the formula of the original hydrate?
1. 3 answers
2. asked by Courtney
3. 2,459 views
A 60 ft. antenna stands on top of a building, From a point on the ground, the angles of elevation to the top and bottom of the
1. 1 answer
2. asked by John
3. 758 views
need help with fill in the blanks--Our fram will p________much p______ this season
1. 1 answer
2. asked by Anonymous
3. 419 views
Calculate mass of silver nitrate needed to prepare a solution of concentration 0.01 moles per liter.
1. 2 answers
2. asked by Slim Shady
3. 688 views
a hotel offers the following specials: plan a is two nights and one meal for $106. plan b is 2 nights and 4 meals for #130. what
1. 2 answers
2. asked by bilal
3. 803 views
The legs of a right triangle are 5cm and 12 cm long. Find the lengths, to the nearest tenth, of the segments into which the
1. 1 answer
2. asked by Billy
3. 716 views
In a standard hydrogen electrode, why does increasing the partial pressure of H2 gas reduce the standard potential (E) of the
1. 1 answer
2. asked by John
3. 615 views
find the sum of 9.98 and $15.00
1. 2 answers
2. asked by nancy
3. 364 views
Find the area of a circle circumscribed about a regular hexagon with an apothem of 5 inches. Round to the nearest tenth
1. 1 answer
2. asked by Marjorie
3. 1,521 views
Thanks Ms. Sue for helping me with my question, but the problem I'm having is how the civeate controls affect where I live (NJ)
1. 1 answer
2. asked by Ki
3. 501 views
The following data represent what 18 people said when they were asked to estimate the crowd at a public gathering:325 450 500
1. 3 answers
2. asked by William
3. 585 views
What are the position for nationalist revolutions for Britain, Prussia, Austria, France and Russia at the congress of troppau?
1. 2 answers
2. asked by jainesh
3. 511 views
Two point charges, the first with a charge of +3.25×10−6 C and the second with a charge of -4.63×10−6 C , are separated by
1. 1 answer
2. asked by Diddy
3. 726 views
Na2CO3write the hydrolysis reaction for the salts. Dissociate the salt into cation and anion and ignore inert species
1. 1 answer
2. asked by BUNNIE
3. 734 views
Choose three climate controls and decscribe how they affect the climate where you live....I live in NJ
1. 2 answers
2. asked by Ki
3. 646 views
f a typical family of four uses electric energy at an average rate of 458 W, how many kWh would their electric bill be for one
1. 0 answers
2. asked by Megan
3. 491 views
a bank teller has a total of 124 bills in fives and tens. the total value of the money is $840. how many of each kind does he
1. 2 answers
2. asked by bilal
3. 2,222 views
a sweater originally cost $37.50. Last week, Moesha bought it at 20% off.How much was deducted from the original price
1. 3 answers
2. asked by samantha
3. 1,549 views
ASAP ASAP if my name is Frances1.What fraction of the letters in my name are vowels? 2.what fraction of the letters in my name
1. 9 answers
2. asked by Frances
3. 889 views

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