Questions Asked on
June 15, 2015

Physics
What is the significance in the observation of discrete spectral lines in the emission spectrum of hydrogen??
asked by Anna 
chemistry
write a balanced chemical equation for the process of photosynthesis and the conditions of the reaction giving physical state of all the substances
asked by aakriti 
E.s groly
5 times the 5th term of arthmetic progression is equa to 10 times the 10th term. Find the common difference and the first term
asked by Aphrodis 
physic
if you have a intial object going 1m/s to the right then after 1.2seconds its going 0.5m/s to the left. whats is the constant acceleration?
asked by john 
chemistry
At room temperature , the density of water is 1 g/ml and the density of ethanol is 0.789 g/ml . What volume of ethanol contains the same no. of molecules as are present in 175 ml of water?
asked by Kajal 
statistics
twelve different vTideo games showing substance use were observed and the duration times of game play (in seconds) are listed below. The design of the study justifies the assumption that the sample can be treated as a simple random sample. Use the sample
asked by melissa jones 
Math
Between 4am and 5am, the water rises from 1.4m to 1.9m. Therefore, it rises 50 centimetres in 60 minutes. This means that the water rises approximately 0.83 centimetres every minute (50 ÷ 60 = 0.83cm). The water will have to increase 0.31m – or 31cm –
asked by Jess 
chemistry
How can i Fill in the missing words Ionisation energy, water, melting point, electronegativity, nonpolar, solvent, pair, boiling points, polar A covalent bond is formed when a 1________ of electrons is shared between the bonding atoms.when the electrons
asked by dennis 
Science 207
Lab 2 – Water Quality and Contamination Experiment 1: Effects of Groundwater Contamination Table 1: Water Observations (Smell, Color, Etc.) Beaker Observations 1 2 3 4 5 6 7 8 POST LAB QUESTIONS 1. Develop hypotheses on the ability of oil, vinegar, and
asked by Lisa 
Maths
Find the points of intersection of parabola Y=x^27x+23 and the straight line Y=7x1.
asked by Kulex 
Physiscs 222
The inner and outer surfaces of a cell membrane carry a negative and positive charge respectively. Because of these charges, a potential difference of about 70*103 V exists across the membrane. The thickness of the membrane is 8.0*109 m. Assumption the
asked by Nathan 
Math
Piano lessons cost $30 per lesson. Find ordered pairs that represent the total cost for x number of lessons.
asked by Cordarius 
English
Identify the following sentences as simple,compound,complex, or compoundcomplex I saved money so that I could buy either a house or a car
asked by Hailu 
Area/volume of hollow figure
A hollow box 10x10in with a thickness of 1in with a length of 500 Would the area be (10*10) Would the volume be ((10*10)(9*9))*500
asked by Joe 
Life orientation
Factors that could limit the core functions of the media
asked by Mbali 
physics
If R is the range for an angle of projectin 0f 15¤ wd the horizntl ' then the 0thr angle of projection for which the range is R 'is
asked by dani 
English
1. What will you have from the menu above?  I'll have a cheese sandwich and a large Coke. 2. What will you buy from the menu above?  I'll buy a cheese sandwich and a large Coke. 3. What will you eat from the menu above?  I'll eat a cheese sandwich and a
asked by rfvv 
Physics
Find x and y components of a vector which is 10 units in length and 40 degrees below the +x axis. I honestly don't even know how to begin this problem .. Please help me !
asked by Sasha 
chemistry
If the theoretical yield of a reaction is 0.173g and the actual yield is 0.165g , what is the percent yield?
asked by dj 
English
A: May I take your order? B: Yes, please. I'll have a chicken sandwich. A:Sure. Anything else? B: One small orange juice, please. (Conversation at a sandwich shop) ============================== Q1: What is the meaning of 'Sure'? Why is 'Sure' used here?
asked by rfvv 
precalculus 11
an object has a mass of m= 3x/4x^2 and density of d=x1/2^2 where ve m/d and state any restrictions on the variable. So this simplifies to v=3x/2x2 my question is the restriction i have found is x cannot be 1 which would make the denominator zero. Do I
asked by George 
Help
Compound subjects those that joined with " and" should take singular verbs. The CD player and moonroof is included in the car's price. Is it true?
asked by Patricia 
ict
) Write an algorithm (in flowchart) that calculates your total daily profit, given an estimated quantity of litres of fuel per day.
asked by tertiary 
Math
How many different rectangles can you make with aperimeter of 12 matchstick
asked by Snethemba 
calc
The base of a solid in the region bounded by the graphs of y = e^x y = 0, and x = 0, and x = 1. Cross sections of the solid perpendicular to the xaxis are semicircles. What is the volume, in cubic units, of the solid?
asked by Anonymous 
math
For f(x) and g(x) given below, find the following, f(x) = (x1)^5, g(x)=16x a) (f of g)(x)= 7776x^5 b) (g of f)(x)= 6x^5+30x^460x^3+60x^230x+7 c)f(f(x)= d) f^2(x)=(f*f)(xx)= Im stuck on c and d
asked by tracy 
shiloh
rolling a number cube and tossing a coin is this independent or dependent?
asked by tiah 
Calculus
A ladder 30 ft. long is leaning up against a building. If the top of the ladder is being pulled up the wall of the building at a rate of 1.5 feet per minute, find the rate at which the base of the ladder is moving toward the building when it is 18 feet
asked by Alex 
physics
a man goes 10m towards north,then 20m towards east then displacement is what
asked by sajid 
chemistry
If 32.9mL of 0.170M BaCl2 are needed to react completely with 35.0mL of 0.160M Na2SO4 . How many grams of BaSO4 will be formed?
asked by jennifer 
algebra
f(x)=3x1 find the value of f(3)f(2)/3
asked by karin 
calculus
A girls throws a tennis ball straight into the air with a velocity of 64 feet/sec. If acceleration due to gravity is −32 ft/sec2, how many seconds after it leaves the girl's hand will it take the ball to reach its highest point? Assume the position at
asked by Anonymous 
Science Help. Thank You! (:
What are the three of the most widely used energy sources in California?
asked by ilovelasagna 
chemistry
1. Unless otherwise instructed, you may use the periodic table in the Chemistry: Problems and Solutions book for this test. You also may use the formulas on pages 238 243. A student increases the temperature of a 556 cm3 balloon from 278 K to 308 K.
asked by tony 
calculus
Find the distance, in feet, a particle travels in its first 4 seconds of travel, if it moves according to the velocity equation v(t)= −t2 + 4 (in feet/sec).
asked by Anonymous 
algebra
the graph of a first degree absolute value function has a Yintercept of 3, xintercepts of 9 and 3 , and a minimum vlaue of 3 at x=6. on the axes provided , sketch a graph of this function.
asked by karin 
Math
The Empire Carpet Company orders merchandise for $17,700, including $550 in shipping charges, from Mohawk Carpet Mills on May 4. Carpets valued at $1,390 will be returned because they are damaged. The terms of sale are 2/10, n30 ROG. The shipment arrives
asked by Jay 
university
A uniform electric field of magnitude 260 V/m is directed in the positive x direction. A +14.0 µC charge moves from the origin to the point (x, y) = (20.0 cm, 50.0 cm). (a) What is the change in the potential energy of the charge field system?
asked by john 
Calculus
On the closed interval, [0, 2*pi], find the absolute maximum of the function f(x)= sin^2(x)
asked by Alex 
MathNPV
Net Present Value Big Steve's makers of swizzle sticks, is considering the purchase of a new plastic stamping machine. This investment requires an initial outlay of $110,000 and will generate net cash inflows of $17,000 per year for 11 years. a. what is
asked by Callie 
algebra2
is f(x)= x^3x^29x+9 a one to one function
asked by karla 
Math
Internal rate of return What is the internal rate of return for the following project. An initial outlay of $9500 resulting in a single cash inflow of $16,281 in 7 years. Internal rate of return for the project is ___%
asked by Katie 
physics
A test rocket is fired straight up from rest. The net acceleration is 20 m/s2 upward and continues for 4.0 seconds, at which time the rocket engines cease firing. What maximum elevation does the rocket reach?
asked by alex 
physics
Hot air balloon A is rising upward a rate of 5.0 m/s. A passenger aboard balloon A observes balloon B rising upward at a relative rate of 7.5 m/s. What is the velocity of balloon B relative to the ground? Assume that up is positive.
asked by alex 
algebra 2
f(x)={2x,x1} Given the piecewise functions shown below, select all of the statements that are true. A.f(5)=1 B.f(2)=4 C.f(2)=4 D.f(1)=5
asked by karla 
physics
A stone is thrown vertically upwards, reaches a highest point, and returns to the ground. When the stone is at the top of its path, its acceleration
asked by alex 
math
The greatest integer function ,shows below, is defined to be greatest________less than or equal to x. f(x)=[[x]]
asked by karla 
physics
An astronaut in a spacecraft looks out her window and observes a comet travel in the opposite direction at a relative speed of 237 m/s. The velocity of the spacecraft is 114 m/s directly away from the sun. What is the comet's velocity relative to the sun?
asked by alex 
Physics
The Golden Gate Bridge in San Francisco has a main span of length 1.28 km, one of the longest in the world. Imagine that a steel wire with this length and a crosssectional area of 4.00 x 106 m^2 is laid on the bridge deck with its ends attached to the
asked by Anna 
physics
A jetliner is traveling east from Seattle to Chicago, a distance of 1,750 miles. The jetliner travels at an average air speed of 620 mph relative to the air. At the jetliner's altitude, the wind is blowing 46 mph to the east. How long does the journey
asked by alex 
math 4
For the spinner above, the probability of landing on black is 1/2, and the probability of landing on red is 1/3, Suppose it is spun three times. What is the probability it will land on black all three times? ansewrs
asked by Anonymous 
math
1000ml x 15 gtt x 1 hr = 31 gtt 8hr ml 60 min How do you do this???
asked by Brian 
Math  NPV & IRR
East Coast Television is considering a project with an initial outlay of $X ( you will have to determine this amount) It is expected that the project will produce a positive cash flow of $60,000 a year at the end of each year for the next 16 years. The
asked by Callie 
Math
Fijisawa Inc. is considering a major expansion of its product line and has estimated the following cash flows associated with such an expansion. The initial outlay would be $1,980,000, and the project would generate incremental free cash flows of $490,000
asked by Alicia 
MATH
If the demand function for a commodity is given by equation p^2+12q=18 and the supply function is given by the equation 700p^2+6q=0, find the equilibrium quantity and price
asked by tracy 
Math
Sorry I wasn't finished with the problem. Fijisawa Inc. is considering a major expansion of its product line and has estimated the following cash flows associated with such an expansion. The initial outlay would be $1,980,000, and the project would
asked by Alicia 
socialology
What situation in which you might see in a gemeinschaft community partnered with organic solidarity?
asked by Dereck 
math
In a class of 40 students 18 passed economics 19 passed accounts 16 passed economics 6 passed mathematics only 9 passed accounts only 5 passed mathematics and accounts only 2 passed accounts and economics only. How many failed in all the papers? How many
asked by david 
algebra
you are looking to join a monthly coffee delivery club. your search has been narrowed down to the two top rated clubs on the internet . five star coffee charges a $40 start up fee and then $8 per month.custom coffee company charges $25 start up fee and
asked by karin 
Physics
A body moved on xaxis at time t secs, the displacement of the particle from the origin is xmetre and the velocity of the particle is vm/s when t=0, s=0 and v=0. 1) given that the particle moves at a constant acceleration and that v=1 when t=4, find a)the
asked by clement 
Chemistry
Balance TeO3^3 + N2O4 > Te +NO3^ using oxidation numbers
asked by Sara 
Social Studies Help (:
List 2‐3 possible alternative (Communist/Socialist/Fascist ideas) solutions to the New Deal’s programs:
asked by ilovelasagna 
Maths
A rectangular room is 3m longer than it is wide. It costs 364 pounds to carpet the room. Carpet costs 16 pounds per square metre. How wide is the room?
asked by Naya 
Differential equation
A first order linear equation in the form y′+p(x)y=f(x) can be solved by finding an integrating factor μ(x)=exp(∫p(x)dx) (1) Given the equation (x+4)^2y′+5(x+4)y=16 find μ(x)= I found it to be e^(5ln(x+4))which is correct** (2) Then an explicit
asked by Joe 
LA
what is the difference between internal conflict and external conflict Need help A.S.A.P
asked by iris 
Chemisty
Balance TeO3^3 + N2O4 > Te +NO3^ using oxidation numbers Need help A.S.A.P
asked by Clara 
math
in a booster club, 1/8 of the members are men. How many male members are in the club.
asked by Anonymous 
Math
Vicky bought 6 and 2/3 yards of one type of ribbon and 4 and 3/4 yards of another type of ribbon to make hair bows. If each bow takes 1 and 1/2 yards, how many hair bows can she make?
asked by Breanna 
Writing
Hello! For critical essays analyzing literature, is it better to analyze one text or can it done with more than one text? Thank you!
asked by Lucina 
Math
What is the approximate average of these numbers: 9,18 and 31?
asked by Elizabeth 
statistics
a private opinion poll is conducted for a politician to determine why proportion of the population favors decriminalizing marijuana possession. how large a sample is needed in order to be 90 percent confident that the sample proportion will not differ from
asked by ash 
math
From the following data calculate final balance and forward it in the pay stubs. Beginning balance $2000 Jan 2 Deposit $500 Jan 10 Check written to Alex company $600 Jan 16 Check written to Angels Company
asked by sara 
math
last one is $300
asked by sara 
Organic Chemistry
Which isomer of 1ethyl3methylcyclohexane is more stable, cis or trans? My teacher hasn't covered this material as of yet, but we have a test done tomorrow on it. What is a cis and trans? Not sure how to begin figuring this out. My text book isn't
asked by Michelle 
Physics
A rowboat is heading across a river at 2.4 m/s east. The current of the river is 1.7 m/s south. What is the rowboat's resultant velocity?
asked by Kathy 
English
She describes the pain as sharp pain located in the right trochanteric region.
asked by Dandy 
physical science
A car is driving at an average speed of 100km/hr for 2 hours, then drives an average of 50.0km/hr for one hour. what was the average speed of the 3 hours? 100.0km/h 100.0km/h +50.0km/h =250.0km/3h 250.0km/3h divided by 3h =83.3km/h
asked by Teresa 
Finance
If a firm buys on trade credit terms of 3/10, net 50 and decides to forgo the trade credit discount and pay on the net day, what is annualized cost of forgoing the discount (assume a 360day year)? The annualized cost of the trade credit terms of 3/10, net
asked by Kelly 
Physics
Boxes A and B are in contact on a horizontal, frictionless surface. Box A has mass 21.0 kg and box B has mass 8.0 kg . A horizontal force of 100N is exerted on box A. What is the magnitude of the force that box A exerts on box B?
asked by Sarah 
Physics
A man is dragging a trunk up the loading ramp of a mover's truck. The ramp has a slope angle of 20.0 degrees, and the man pulls upward with a force whose direction makes an angle of 30.0 degrees with the ramp. How large a force is necessary for the x
asked by Michaelanne 
History
Using China as a case study, explore the entry of developing countries into the WTO and the effects of globalization. What is the WTO? Who gains and who loses from globalization? Focus on these two perspectives: a. The entry of developing countries into
asked by Rafa 
Politics
The nerve center of the American Presidency is
asked by shelby 
Math
to determine the number of catfish in a pond, a game warden catches 131 catfish, tags them and throws them back into the pond. later, 20 catfish are caught, 10 of them are tagged. How many catfish would the game warden expect to be in the pond? 131/10 20/x
asked by Kayla