Sunday
April 20, 2014

Posts by Rach


Total # Posts: 40

physics
consider a toy car that you pullback to make it go forward. Is it a force multiplier or a distance multiplier? Defend your answer with the observations you could make

physics
explain why a flat sheet of paper and a sheet of paper crumpled into a ball which are dropped from a height of 2 meters will not accelerate at the same rate?

Mathh :/
A light flashes every 15 minutes. a second light flashes every 18 minutes. both lights flash together are 2 a.m. What will the time be when they net flash together?

math
A refrigerator is 3 ft wide, 2 ft deep, and 6 ft high. How much floor space does it cover? What is the volume?

physics
Coasting due west on your bicycle at 7.9 , you encounter a sandy patch of road 7.0 across. When you leave the sandy patch your speed has been reduced by 2.0 to 5.9 . 1. Assuming the sand causes a constant acceleration, what was the bicycle's acceleration in the sandy patch...

Trig.
Solve. Check for extraneous solution. 6x= √20+6x

Trig.
Subtract. Simplify is possible. (x^2-3x-28)/(x^2-x-42) -(x^2+10x+24)/(x^2+x-12)

CALCULUS PLEASE HELP
suppose m(0) milligrams of a drug are put in the blood of an injection. The amount of drug t hours after the injection is given by m(t)=m(o)e^-kt, for t (=>) 0, where k is the rate constant, which is related to the half life. we also treat oral administration of drugs as an...

Advanced Math Help!
suppose m(0) milligrams of a drug are put in the blood of an injection. The amount of drug t hours after the injection is given by m(t)=m(o)e^-kt, for t (=>) 0, where k is the rate constant, which is related to the half life. we also treat oral administration of drugs as an...

Chemisrty
An intravenous line provides a continuous flow of drug directly into the blood. Assuming no initial drug in the blood, the amount of drug in the blood t hours after the dosing begins in m(t) - (a/k)(1-e^-kt), for t (=>)0, where k is the rate constant (again related to half ...

Trig.
Find to the nearest degree, all values of ө less than 360˚ that satisfy the equation 2tan^2θ-2tanθ=3

Trig.
Josh kicks a soccer ball with an initial velocity of 18 feet per second out of a window from a height of 12 feet. The function h(t)= -16t^2+18t+12 represents the height of the soccer ball after t seconds.What is the domain of this function in the context of this problem?

Bio
THE

Physics
A mass M of 5.80E-1 kg slides inside a hoop of radius R=1.50 m with negligible friction. When M is at the top, it has a speed of 5.15 m/s. Calculate the size of the force with which the M pushes on the hoop when M is at an angle of 41.0°.

Chemistry
Find the pH of a buffer that consists of .28 M NH3 and .12 M NH4Cl (pKb of NH3=4.75)

Economics
Would a change in money supply shift the LAS curve?

Economics
Would a reason the aggregate demand curve shifts downward be because of: A lower price level decreases consumption?

Chemistry
If 15.0 kJ are released when 1.40 g of F2 reacts with an excess of SiH4, complete the thermochemical equation below. SiH4(g) + 2 F2(g) SiF4(g) + 4 HF(g) ÄHrxn=?kJ

Economics
How do you calculate the growth rate of real GDP between two years?

Econ
How do you calculate the growth rate of real GDP between two years?

physics
A diffraction grating gives a second-order maximum at as angle of 31‹ for violet light (ƒÉ = 4.0 ~ 102 nm). If the diffraction grating is 1.0 cm in width, how many lines are on this diffraction grating?

physics
so n= 2 (second order) theta= 31 degrees d= 0.1 m lambda= 4.0 x 10^-7 m (i'm required to solve in m) is this correct?

physics
isn't that derived from the formula used for single slit though? and this is multiple slit (isn't that the same eqns as double slit?

physics
Sorry about the double post, and the question is: A diffraction grating gives a second-order maximum at as angle of 31 degrees for violet light (wavelength = 4.0 x 102 nm). If the diffraction grating is 1.0 cm in width, how many lines are on this diffraction grating?

physics
A diffraction grating gives a second-order maximum at as angle of 31‹ for violet light (ƒÉ = 4.0 ~ 102 nm). If the diffraction grating is 1.0 cm in width, how many lines are on this diffraction grating?

Physics
Question: Based on Millikan's Oil Drop Experiment, what can you conclude about the existence of a smallest unit of electric charge, of which other charges are multiples? Include a diagram of Millikan's original apparatus. So i found lots of great websites, so please do...

home economics
three course meal?

Algebra
28. A gardener measures the tallest of his prize-winning sunflowers and finds that the height is 60 in. The sunflower was 52 in. tall the last time the gardener measured it. Write and solve an equation to find how many inches the sunflower grew.

biology
How do adaptive radiation, polyploidy, and sexual selection relate to speciation? And what is allopatric and sympatric speciation and how to they relate to the earlier mentioned topics?

biology
What is the heterotrophic hypothesis? I cannot find anything online that explains it in terms I understand.

Romeo and Juliet quick question
because she was by herself all the time an acting depressed in which she says was because of tybalt but really it was for romeo.

Math 10 x-intersept y-intersept
Please help me with this question Q:For each line,determine the x-intersept,the y-intersept,and the slope a) 2x-5y+10=0 b)4x+y-12=0 please explain carefully , I'm dumb... thank you

world history
what were the three key mistake napoleon bonaparte made?

algbra
Did you hear about....

IT
im doing some homwork for college and i dont understand what is ment by e-commerce i have to describe the hardware software and network technologies that are involved in e-commerce please help

ap us history
what was alexander mitchell palmer's background. What religion is he associated with and how was his relationship with his parents? http://de.wikipedia.org/wiki/Alexander_Mitchell_Palmer This is in German, but it's not too hard to figure out what they're saying! Th...

english
we are reading the scarlet letter by Nathaniel Hawthorne. can you please tell me why Arthur Dimmesdale is the greatest sinner in the book and give examples and quotes (for quotes include what chapter it was found in) thanks! You should go to www.sparknotes.com/lit and read the...

math
a simple question but i need help for which eqn is the graph of a line w/ undefined slope that passes through (5, 1) a. y=1 b. 5x=y c. x=5y d. x=5 and can you show me how you did the problem. thanks (5,1) is the point on the graph where x = 5 and y = 1. Plug in x = 5 to each e...

maths
ocanrrmoyrte

science
What is the point at witch gas changes into a liquid? The same as the point at which liquid changes to a vapor; i.e., the boiling point. It is sometimes called the condensation point, also. Temperature, wise, however, it is the same T.

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