Questions Asked on
October 22, 2016

Chemistry
According to the quantummechanical model for the hydrogen atom, which of the following transitions would produce light with longer wavelength: 3p to 2s or 4p to 2s? A) The 3p to 2s transition would produce light with longer wavelength. B) The 4p to 2s
asked by Sue 
math
It takes 8 hours for one crew to clean an office building. It takes a second crew 10 hours to clean the same building. If the first crew works 2 hours and leaves and the second crew takes over to complete the job, how long will it take the second crew to
asked by Christos 
Algebra
The formula I = PRT where I = Interest, P = principal, R = rate, and T = time is used to calculate the amount of simple interest earned. Solve this formula for T.
asked by Kay 
Chemistry
A Solution Has A PH Of 3.4.What Is Its Hydrogen Ion Concentration?
asked by Ola 
Physics
A football quarterback shows off his skill by throwing a pass 45.90 m downfield and into a bucket. The quarterback consistently launches the ball at 40.00 ∘ above horizontal, and the bucket is placed at the same level from which the ball is thrown. What
asked by Lily 
physics
If a 5kg object experiences a 10 N force for a duration of 0.10 second then what is the momentum change of the object.
asked by Manilyn 
Math7 grade
Wallpaper was applied to one rectangular wall of the photographer s studio. .The dimension of the wall are shown below 42 ft by 25.5 feet .If the total cost of the wallpaper was &771.21, what was the cost of the wallpaper per square foot.
asked by Anna 
Maths
A rectangle measuring 7cm by 4cm is enlarged by ratio 2:1? a)what's area 1)the original reactangle 2)the enlarged rectangle b)by what ratio has the area been enlarged
asked by Abdirahman 
PHYSIC
A bullet is fired in a horizontal direction with a muzzle velocity of 300m\s in the absence of air resistance,how far will it have dropped in travelling a horizontal distance of (a)20m (b)40m (c)60m (d)how far will it drop in one second
asked by JOY 
physics
The pressure of water on the ground floor is 40,000 Pascal, and at the first floor is 10,000 pascal. Find the height of the first floor.
asked by Manilyn 
Chemistry
Calculate the wavelength, in nanometers, of the spectral line produced when an electron in a hydrogen atom undergoes the transition from the energy level n = 2 to the level n = 1.
asked by Joseoh 
math
Fishing hook E is dropped 2.5 times its present depth. where is fishing hook E now? NOTE: FISHING HOOK E is 7.1 is the answer 4.14 or 17.75
asked by alice 
History
How did George Mason influence the creation of Bill of Rights? A.He refused to sign the United States Constitution. B.He encouraged others to opposed the ratification of the Constitution. C.He assembled a antifederalist convention in Virginia to discuss
asked by James 
Present Value Math
Find the present value of an ordinary annuity of $500 payments each made quarterly over 6 years and earning interest at 8% per year compounded quarterly. $9,456.96 $2,311.44 $24,968.07 $5,264.38 Thank you
asked by Kal Jay 
Chemistry, que 10
How many atoms are present in one formula unit of calcium hydrogen carbonate Ca(HCO3)2? Could someone explain to me why the answer is 11? Thank you.
asked by Cheezel 
PLEASE HELP Math
As a fringe benefit for the past 8 years, Colin's employer has contributed $50 at the end of each month into an employee retirement account for Colin that pays interest at the rate of 8%/year compounded monthly. Colin has also contributed $2,000 at the end
asked by Tammie 
Math
Pierce Publishing sells encyclopedias under two payment plans: cash or installment. Under the installment plan, the customer pays $23/month over 2 yr with interest charged on the balance at a rate of 15%/year compounded monthly. Find the cash price for a
asked by Kal Jay 
English
Which of the following quotes from Adventures of Huckleberry Finn contains a metaphor? A:"Look at it, gentlemen and ladies all; take a hold of it;shake it. There's a hand that was the hand of a hog; but it ain't so no more; it's the hand of a man that's
asked by Marylyn 
Math Homework
The following frequency table contains the total number of deaths worldwide as a result of earthquakes from 2000 to 2012. Year Deaths 2000 231 2001 21,357 2002 11,685 2003 33,819 2004 228,802 2005 88,003 2006 6,605 2007 712 2008 88,011 2009 1,790 2010
asked by Chris 
Science
suppose a skydiver (mass = 75 kg) is falling toward the earth. when the skydiver is 100 m above the earth he is moving at 60 m/s. at this point calculate the skydiver's
asked by Michelle 
physics
What is the pressure of the water in pascals at the bottom og a lake which is 5 meters deep?
asked by Manilyn 
Algebra
Mickey charges $15, $30, $45, and $60 for babysitting 1, 2, 3, and 4 hours, respectively. Is the relationship between the number of hours and the amount charged porportional? If so, find the unit rate. If not, explain
asked by Amy 
science
An object is placed at a distance of 12 cm from a concave mirror of radius of curvature 16 cm .find the position of the mirror.
asked by tia 
Math Physics Torque Equilibrium
A uniform meterstick pivoted at its center has a 100 g mass suspended at the 21.0 cm position. At what position should a 95.0 g mass be suspended to put the system in equilibrium? What mass would have to be suspended at the 80.0 cm position for the system
asked by Brandon 
Math
Find the accumulated amount A if the principal, P = $3700 is invested at the interest rate r = 7%/year for t = 12.5 years compounded semiannually. Round your answers to two decimal places. a. The accumulated amount is $8544.01. b. The accumulated
asked by Jass 
physics
The center of a 1.00km diameter spherical pocket of oil is 1.00kkm beneath the Earth's surface. Estimate by what percentage g directly above the pocket of oil would differ from the expected value of for a uniform Earth? Assume the density of oil is
asked by katie bornia 
Describing Data
The following frequency table contains the total number of deaths worldwide as a result of earthquakes from 2000 to 2012. Year Deaths 2000 231 2001 21,357 2002 11,685 2003 33,819 2004 228,802 2005 88,003 2006 6,605 2007 712 2008 88,011 2009 1,790 2010
asked by Anonymous 
math
The value of a car decreases at a constant rate. After 1 year the value of the car is $20,000. After 2 more yearsit is $14,000. Write an equation in slopeintercept that represents the value y (in dollars) of the car after x years.
asked by sophia 
MATH HELP PLEASE I HAVE NEVER BEEN MORE CONFUSED
The value of a car decreases at a constant rate. After 1 year the value of the car is $20,000. After 2 more yearsit is $14,000. Write an equation in slopeintercept that represents the value y (in dollars) of the car after x years.
asked by sophia 
Repost(Physics)
A vehicle moves in a straight line with an acceleration of 2 km/h^2. By how much does the speed change each second? Answer in units of km/h. Plz help?
asked by Jazz 
Measures of Central Tendency
The table below shows the scores of a group of students on a 10point quiz. Test Score Frequency 3 0 4 2 5 2 6 1 7 2 8 3 9 0 10 4 The mean score on this test is: The median score on this test is
asked by shley 
BioChemistry
how many moles of estradiol (mw = 272) are there in 2 ml of a 100 μm solution
asked by Alwxy 
math
Fishing hook G is let down 2 1/2 times its present depth. where is fishing hook G now? FISHING HOOK G = 6 2/3
asked by alice 
math
The value of a car decreases at a constant rate as it grows older. When the car is 2 years old, it is worth $23,000. When the car is 5 years old it is worth $15,500. Write and equation relating y (value of the car $) to x (age of car).
asked by sophia 
math
a gardner having 150 meters of fencing materials wishes to enclose a rectangular plot of land and also erect a fence across the land parallel to two of the sides.find the maximum area he can enclose
asked by hemant 
bctc
A tank of water in the shape of an inverted cone is being filled with water at rate of 12m^3/min. the base radius of tank is 26 meters and the height of the tank is 8 meters. at what rate is the depth of the water in the tank changing when the rains os the
asked by alaeddin 
Physical
A motor car travelling at 14m/s on dry flat surface should be able to stop in 14m.Assuming the deceleration to be uniform. Given: its value and the corresponding bracking time is 7m/s^2 , 2 sec Calculate the distance travelled during the first second
asked by Joey 
Algebra
One alloy of brass is 70% copper and 30% zinc. Another alloy of brass is 40% copper and 60% zinc. How many grams of each of these alloys need to be melted and combined to obtain 300 grams of a brass alloy that is 60% copper and 40% zinc
asked by Jonn 
math
The value of a car decreases at a constant rate. After 1 year the value of the car is $20,000. After 2 more yearsit is $14,000. Write an equation in slopeintercept that represents the value y (in dollars) of the car after x years. What is the yintercept
asked by collin 
Please Help
Find the present value of an ordinary annuity of $1,400 payments each made semiannually over 8 years and earning interest at 12% per year compounded semiannually. $6,954.70 $9,763.58 $14,148.25 $3,365.99 Thanks for the help
asked by Kal Jay 
Physics
A vehicle moves in a straight line with an acceleration of 2 km/h^2. By how much does the speed change each second? Answer in units of km/h. Plz help?
asked by Jazz 
Math
A car rental agency charges $35 per day to rent a car and $14.95 per day for a global positioning system (GPS). Customers are charged for their full tank of gas at $3.40 per gallon. A car has a 19 gallon tank and a GPS. a) Write a function rule
asked by Steve 
English
1. This is where I live. 2. Tell me where he lives. 3. Will you tell me why he was late. 4. Do you know how he solved the problem. 5. I remember when he arrived.  There are where, why, how, when in the sentences. Which ones
asked by rfvv 
science
A flywheel makes 120 rpm. Find the angular speed of any point on the wheel and linear speed of a point is 10 cm from the center of the wheel.
asked by Shubhrajyoti ghosh 
physics
Calculate the mass of moon if free fall acceleration near it surface is know be 1.62 m/s^2 ( radius of moon is 1738 Km )
asked by Anonymous 
Algebra
Country A has a growth rate of 4.7% per year. The population is currently 5,646,000 and the land area of Country A is 13,000,000,000 square yards. Assuming this growth rate continues and is exponential, after how long will there be one person for
asked by David 
Physics
I've been stuck on this questions for 2 days A 7.2kg bowling ball traveling at a speed of 3.5 m/s collides with a 1.2kg bowling pin at rest. After the collision, the pin moves with a speed of 3.0 m/s at an angle of 60° with respect to the original
asked by Lana 
Physics
An astronaut with mass M floating at rest in the International Space Station catches a spinning frisbee that someone has thrown directly towards his or her center of mass. The frisbee has a mass m, a radius r, a moment of inertia of ⅔ mr2, and had a
asked by Juan L 
Science
A screwdriver with the one similar shaft in a 4 cm handle is used to tighten a screw the mechanical advantage is
asked by Courtney 
Chemistry
What happens to an atom when it absorbs energy? 1) The atom stores the energy for later use. 2) The atom reemits the energy as electromagnetic radiation. 3) The extra energy increases the speed of the electrons in their orbitals. 4) The extra energy
asked by Beth 
Chemistry
0.3975 g of an oxide of divalent metal on reduction with hydrogen gives 0.090 g of water. The atomic weight of metal is: a) 63.5 b) 24 c) 55.5 d) 40
asked by Avy 
physics
If the systolic blood pressure is 120mmHg, what is the pressure in lb/in^2 and in pascals?
asked by Manilyn 
Physics
A 1.11 kg toy train rolls around a circular horizontal track. If the train has an angular acceleration of 2.2 rads/s2 and is released with an angular speed of 17.0 rpm, what time is required for the train to come to a complete stop?
asked by Tom 
Physics
Can you find a vector quantity that has a magnitude of zero but components that are different from zero? Explain.
asked by Amrit 
CALCULUS
if F(x) = f(xf(xf(x))),where f(1) = 4, f(4) = 6, f '(1) = 4, f '(4) = 5,and f '(6) = 6,find F '(1).
asked by Gagan 
math
A bird beats it's wing 24 times per second. How many times will it beat it's wing in one hour
asked by karen 
English
1. Did you know? + Where did he go? => Did you know where he went? 2. Did you think? + Why was he late? => Did you think why he was late? => Why did you think he was late?  I thought he was late because he got up/gotten up late. 3. Did he know? + When did
asked by rfvv 
science
Mass of 48.176 * 10raze to power 23 molecules of CH4 will be
asked by Anonymous 
Calculus
An error in the measurement of the radius of a circle results in an error in the computation of its area. Find and interpret the sensitivity of area (a) of a circle to the measurement of radius, r, when the radius r=2 meters.
asked by jan 
Math (Calculus)
Determine if each of the following functions is in BigO, is BigOmega and is BigTheta of x: (Could be multiple) a) f(x)=10 b) f(x)=3x+7 C) f(x)=x^2+x+1 d) f(x)=5log(x) e) f(x)=x f) f(x)=x/2 I'm in calc 1 and I have no idea what's it even asking me.
asked by Ray 
Chemistry
A chemist reacted 0.05 mol of sodium with water to form 50cm3 of sodium hydroxide what was the mass of sodium reacted Na+h2pNoah+h2
asked by Maria 
Biochemistry
You wish to make 3 reactions (1 ml each) with the specified amounts of protein. The remainder of each reaction consists entirely of buffer. The source of your protein is a stock solution that has a concentration of 0.5 mg/ml. What is the volume of stock
asked by Alwxy 
English
1. Do you know? + Can he play the piano? 2. Do you know if/whether he can play the piano? 3. Do you think? + Is he still alive? 4. Do you think if he is still alive? * 41. If do you think he is still alvie? 5. Do you think he is still alive?
asked by rfvv 
English
1. I bought a ballpoint pen at the stationery store. 2. I bought a ballpoint pen at the stationery store. 3. I bought a ball pen at the stationery store. 4. I bought a ballpen at the stationery store. 5. I bought a ball point at the stationery store. 6. I
asked by rfvv 
Chemistry
The principal quantum number (n): 1) specifies the subshell of the orbital. 2) specifies the principal shell of the orbital. 3) specifies the 3D shape of the orbital. 4) specifies the maximum number of electrons. 5) none of the above
asked by Beth 
algebra 1
by the end of your 6th Spanish lesson you have learned 20 vocabulary words. when you started (0 lessons) you only knew 2 words. write an equation that gives the number of vocabulary words you know, y, in terms of the number of lessons you have had, x. (iv
asked by mackenna 
english
"They have arried in the Land of opportunity and the opportunities are swirling dizzily promiscuously around them" Is this quote suppose to have a negative connotation? The passage I got it from is about someone arriving to America and being disappointed
asked by Anonymous 
Chemistry
The heat of combustion of C2H4 at 27 C at constant prssure is 333.3 Kcal. What will be the heat of combustion at constant volume considering the water to be in liquid state? (R=1.987 cal)
asked by Sidharth 
Math 7 grade
The photographer wants to display her photograph in her studio A wall in her studio is 10 ft wide .She wants each picture to be 3 feet apart .If she displays photographs that are 4"wide by 6" high . How many photographs can she display side by side on her
asked by Anna 
Math
A shopper keeper sold a total of 15 boxes of pencils on Monday and Tuesday. She still three more boxes on Monday then on Tuesday. There were 12 pencils in each box. How many pencils did she sell on Monday?
asked by Gabriella 
physics
Question 6) Oil and gas exploration companies find new underground deposits by measuring (with incredible precision) the value of g at the Earth's surface. EXTRA INFO GIVEN: The challenge: F=Gm1m2/r^2 ONLY works for two cases: point masses, or if one of
asked by katie bornia 
Chemistry
What pressur would the propane gas sample have at 75Ml
asked by Teela Lange 
Grammar
Is the word "bring" a linking verb?
asked by Maggie 
math
A model car travels horizontally after being released. The car travels a distaance d metres in a time of t seconds. d is directly proportional to t. The car travels 20 metres in a time of 2 seconds. A.Calculate the distance the car travels in 3 seconds.
asked by Michelle 
Physics
Can you find two vectors with different lengths that have a vector sum of zero? What length restrictions are required for three vectors to have a vector sum zero? Explain.
asked by Amrit 
Business Mathematics
Find the sum of first thirteen terms of a linear sequence whose 8th term is 18 and 11th term is 24.
asked by Boadi Yiadom Ellen 
Physics
A 500kg diskshaped nonrotating satellite gets hit by a 5g piece of space debris moving at 1 km/s. If the debris buries itself near the satellite’s rim, how rapidly will the satellite rotate after the hit?
asked by Megan 
English
1. I think you are not serious, are you? ..................................... Does 'serious' mean 'injured severely'? ======================================= 2. I don't think he is serious, is he? (Does 'serious' mean 'thoughtful' or 'injured badly'
asked by rfvv 
Kumar
C6H6OCH2C6H6 + HI
asked by Rishikesh 
Physics
in the laboratory frame, a photon of energy 8.0 x 10^3 eV and a free electron of energy 2.0 x 10^3 eV (consider what is meant by 'energy' here; is it kinetic energy? total energy? can it be total energy?) are moving directly towards each other and collide
asked by deniz 
Math
If there are 35 kids in a class and 22 are girls what is the ratio of girls to boys in the class
asked by Nick 
Math
12(p2 1/3)=8
asked by Wossum 
math (horizontal tangent line)
Determine the point(s) if any at which the graph of the function has a horizontal tangent line. y=x^3+x I graphed this function out and it looks like there isn't any horizontal tangents. Am I correct or am I forgeting something? I tried finding the
asked by Ray 
Math
2(p2 1/3)= 12
asked by Wossum 
Physics
A 51.6 g box is left 17.8 cm from the centre of a merrygoround. If the box has coefficients of friction of μs = 0.790 and μk = 0.480 with the merrygoround, what is the maximum speed of the merrygoround without having the box slide off of the
asked by Tom 
Math
What is the distance between 86.25 to 17.75
asked by alice 
English
What Is Annoying
asked by Nesuha 
Eng
Wath Is Diplomat
asked by Nesuha 
Chemistry
Find the frequency if given energy 6.3x10^19 Do I use the formula E=hf? 6.3x10^19=6.626x10^34(f) Then do I divide E and H?
asked by Anonymous 
math
design a container box yhat can be able to hold 15pieces of 4g candiy and has a parabola as the main theme of the design. use the correct mathematical equation in solving for the dimensions of the container.
asked by boyd 
Math
A car rental agency charges $35 per day to rent a car and $14.95 per day for a global positioning system (GPS). Customers are charged for their full tank of gas at $3.40 per gallon. A car has a 19 gallon tank and a GPS. a) Write a function rule
asked by Steve 
English
1. This is the way by which he passed. 2. This is the way. He passed by the way. (Are both correct? If the two sentences in #2 are combined, can we get #1?) 3. This is the way by which he could understand the situation. 4. This is the way. He could
asked by rfvv 
integrals
why cant we just use power rule for this 1/((x^2+4))^2
asked by byu 
english
Chinua Achebe's Things Fall Apart as a defiance of eurocentric sociological and anthropological narration of South Africa
asked by lydia 
science
Now what happens if your feet hit a slippery spot on the ground? your feet slip and the (blank) cant exert as much force back on you.
asked by Anonymous 
Physic
Point B is 5.0 KM east of Point A. A cyclist leaves A and goes 3.0 km in a direction of 30 degrees to the north of east A. in what direction mus the rider go from this point to reach point B? B. what distance must be covered? please explain
asked by Anna 
Math
2.6(m+1.9)=6.5 Solving equations involving distributing property
asked by Wossum 
Science
an object of mass 2 kg is dropped from a certain height.On rebounding from the ground,it rises vertically till 2/5th of its initial height.what will be the ratio of magnitude of momentum of the object just before and after striking the ground?
asked by Anonymous 
Math, Functions
If g(t)= 1/t21, how to solve g(t)=0 ...? Please teach me..!
asked by Chris 
Math, Functions
What is the Domain and Range of the function f(x)=2x+1 ? Please teach meeeee!
asked by Jiwon 
math
4. Thomas is at a store buying school clothes. Tshirts are on sale for $13 each and jeans are on sale for $18 each. a) Write an equation that represents the total cost for x Tshirts and y pairs of jeans. I need help with a.. b) Thomas bought six Tshirts
asked by Sasha 
math
1 1/2(n4 1/2)=12 Solving equations involving the distributing property
asked by Wossum 
physics
The water tank is 8 m above the tap. What pressure forces the water out from the tap?
asked by Manilyn 
Physics
If vector A×vector B=0,does it necessary follow that A=0 or B=0? Explain.
asked by Amrit 
Accounting
during 2016 bava corporation sold merchandise for a total of 600000 the cost of merchandise to bava was $450000 bava offers credit terms of 1/10, n/30 to encourage early payment. at year end there are $15000 of sales still eligible for the 1% discount.
asked by Larry Burton 
Chemistry
calculate the mass ratio of 25% cacl2 solution and water to prepare 500 g of a 5% salt solution
asked by Regan 
Math
Write two that have given absolute value of 4,38,260,4092?
asked by Amberly 
Math, Functionsons
What is the domain and range of the function f(x)=x^22? please teach me..!
asked by Jiwon 
Calculus
Can you please help me find the x and y intercepts of this equation. How do I solve this? y= x^2 √9x^2
asked by Stephanie 
bctc
Suppose that 3 ≤ f '(x) ≤ 5 for all values of x. prove that 18 ≤ f(8)f(2) ≤ 30 ?
asked by alaeddin 
Computer
Please give me an example of websites that are good for academic work..! What is the thing have in common??
asked by Ariana 
Cost Accounting
What effect can an increase in production volume has on per unit fixed costs, per unit variable costs, total fixed costs, and total variable costs?
asked by Patte 
Chemistry
In a reversible reaction PCl5 ↔ PCl3 + Cl2, the value of K is 2.5. What will the partial pressure of Cl2 be?
asked by Sidharth 
physics
I have put a 100 gram weight ball in a plastic bottle and weight of this bottle is 20 gram .Now I shake this bottle in horizontal direction towards 5 centimeter back and forth with the applying force of 1 newton .So what will be the kinetic energy of this
asked by vikram 
cal
If h(x) = (4 + 3f(x))^(1/2) ,where f(3) = 4 and f '(3) = 3,find h'(3).
asked by Gagan 
Physics
Is it possible that resultant of two vectors e smaller than the smaller of the two vectors?
asked by Sonika 
physics numerical
A 15 g bullet is fired from a gun of mass 2kg with a speed of look m/s . Find the recoil velocity of the gun.
asked by Anonymous 
Science
Give reasonwhy current pass through the water
asked by Mukesh shankopal (koli) 
Math
Suppose you want to fence in a field, and then subdivide it into three equal parts. You have 2400 yards of fencing material to use. What should be the dimensions of one of the three smaller fields, if you want to fence in the maximum area?
asked by sdf 
special education
Which children (not just gender) with ADHD are least likely to be identified as having it?
asked by Heather 
math
A line has a slope of 6 that passes through the point (12,5). What is the equation of the line? a. 6x + y = 77
asked by Sasha 
english
Chinua Achebe's Things Fall Apart as a Postcolonial novel
asked by lydia 
english
Nwoye and Ikemefuna as a representation of the rise of new cultural formation among the igbo society in Achebe's Things Fall Apart
asked by lydia 
English
1. Do you ask what it was? 2. Do you tell what it was? 3. Do you remember what it was? 4. What do you suppose it was? 5. What do you imagine it was? 6. What do you believe it was?  Are they all grammatical?
asked by rfvv