Science & Mathematics - 28 November 2007

1.( Consider the function f (x) = 4-2x^2 on the interval
[-2,7].
(A) Find the average or mean slope of the function on this interval,
f (7)- f (-2)/7-(-2)

(B) By the Mean Value Theorem, we know there exists a c in
the open interval (-2,7) such that f 0(c) is equal to this mean
slope. For this problem, there is only one c that works.
c =?

help......help

2007-11-28 12:16:24 · 1 answers · asked by aminer_lover90 1 in Mathematics

2007-11-28 12:16:22 · 3 answers · asked by Daisha G 1 in Mathematics

If f(x-3) = x^3 + 2x^2 + 7x +1, determine f(x)

I'm at a complete loss as to figuring out the process that you would need to solve this problem. Any help would be highly appreciated, thanks so much!

2007-11-28 12:15:45 · 2 answers · asked by Student of Math 2 in Mathematics

2007-11-28 12:15:39 · 1 answers · asked by Anonymous in Mathematics

How do evolutionists explain this event? And how about the Creationist explanation?

2007-11-28 12:13:25 · 8 answers · asked by Free Thinker 6 in Earth Sciences & Geology

I have an assignment to do. This is what it sais:

Imagine that you are one of the leading agriculture producers in Canada, and have been given the opportunity to begin prodution anywhere in the world. Furthermore, you are able to produce any crop you like.

What type of crop would you grow? Why do you feel this is the most viable vegetation suitable for your business? This section involves some individual research. You should note the different returns (profit motives) that are achieved by the vegetation you are growing. You should also include the hardiness of the plant. Is it able to battle certain elements? Does it need as much maintenance?

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That is only the first question. Please help me out a bit here; I've tried to research but it seems some information on wheat is difficult to find. What is meant by "returns (profit motives"? What you can make from wheat and how you gain mo

2007-11-28 12:12:58 · 1 answers · asked by alozaps 1 in Geography

is it getting bigger or smaller?

2007-11-28 12:12:47 · 6 answers · asked by Anonymous in Astronomy & Space

2007-11-28 12:12:19 · 10 answers · asked by MZ954 2 in Astronomy & Space

2007-11-28 12:11:26 · 21 answers · asked by amr_systems2007 1 in Earth Sciences & Geology

1) Na or Na+
2) F or F-
3) Fe, Fe^2 or Fe3+
4)H,H+,H-

My answers 1) Na, 2) F- 3)Fe 4) H-
Am i right

2007-11-28 12:09:50 · 4 answers · asked by nothinbutnet2009 4 in Chemistry

a method of removing CO2 from a spacecraft is to allow the Co2 to react with sodium hydroxide.(THE PRODUCTS OF THE REACTION ARE SODIUM CARBONATE AND WATER)
What volume carbon dioxide at 25 degree celcius and 749 mmHg can be moved per kilogram of sodium hydroxide that reacts?
A.301 L
B. 284l
c. 276L
D.310 L
e.620l

2007-11-28 12:09:04 · 1 answers · asked by magdala j 1 in Chemistry

The value of c is the value of a^2 + b^2 when a=2 and b= -2.

Find the value of c^2 - 4.

Find another way to solve this problem.

I did a^2 + b^2 = c
2^2 + (-2)^2=c
4 + 4 + c
c = 8

so c^2 - 4 = v
8^2 - 4 = v
64 - 4 = v
v = 60

What is another way to solve it??

2007-11-28 12:07:56 · 6 answers · asked by Smilingcheek 4 in Mathematics

1. _____ are also known as "L waves." Compressional waves Shear waves
Surface waves Transverse waves

2. A single seismogram locates the _____ of an earthquake. epicenter focus
plate boundary none of these

3. Which statement about the cause of building collapse during an earthquake is FALSE? Buildings on bedrock survive earthquakes better than buildings on soil. Most buildings can survive horizontal shaking better than vertical shaking.
Soils under buildings may settle from severe shaking. Some soils under buildings become liquefied because of severe shaking.

4. The part of the seismograph that moves during an earthquake is the: base drum
pen record sheet

5. Which best describes foundation damage? The foundation cracks during the earthquake Buildings built on soil sink due to settling after an earthquake
The foundation is not strong enough to withstand the earthquake waves even though the building is none of these

6. The place in the Earth where the earthquake actually occurs is known as the _____. epicenter focus
plate boundary none of these

7. The point on the surface of the Earth directly above where the earthquake actually occurs is the _____. epicenter focus
plate boundary none of these

8. What are the two major causes of structural damage during an earthquake? ground shaking and flooding foundation failure and flooding
ground shaking and foundation failure none of these

9. Why might cloudy water be indicative of an upcoming earthquake? cloudy water has low sediment content, which may indicate an upcoming earthquake cloudy water has high sediment content, which may indicate an upcoming earthquake
cloudy water indicates an increase in elevation, which may indicate earth movement none of these

10. Why are multiple seismographs needed to properly measure the magnitude of an earthquake? because each seismograph measures a particular type of wave because one seismograph can only determine how far away the epicenter is, not in which direction
both of these neither of these

11. Why are earthquakes generally more destructive than volcanoes? They are caused by plate motions Earthquakes are always accompanied by tsunamis
The area affected by an earthquake is larger They occur only in populated areas

12. What is the name of the scale used to measure the magnitude of an earthquake? the epicenter scale the elastic-rebound scale
the fault scale the Richter scale

13. A(n) _____ is a break in the Earth's crust. earthquake lithospheric plate
epicenter fault

14. Which is the most accurate measurement of an earthquake's magnitude? Richter Scale seismic moment scale
elastic-rebound scale none of these

15. How many seismograms are needed to locate the epicenter of an earthquake? 1 2
3 4

16. Earthquakes that cause damage over larger areas are most likely to have occurred at: collision boundaries diverging boundaries
sliding boundaries subduction boundaries

17. Why did the Alaskan earthquake of 1964 have a higher seismic moment than the San Francisco earthquake of 1906? because it caused more damage because it had a higher Richter rating as well
because it released more total energy none of these

18. Which of the following is indicative of an upcoming earthquake? a decrease in elevation an increase in resistance
a clear water well none of these

19. This type of wave is the most dangerous. compressional waves shear waves
transverse waves surface waves

20. _____ are also known as "P waves." Compressional waves Shear waves
Transverse waves Surface waves

21. The part of a seismograph that does NOT move during an earthquake is the: base drum
pen record sheet

22. Which of the following is the major cause of earthquakes? the motion of lithospheric plates an erupting volcano
a collapsing cavern the impact of a meteor

23. One seismograph station, by itself, can determine the: direction to the epicenter location of the epicenter
distance to the epicenter location of the plate boundary

24. What is the name of the theory about the cause of earthquakes? the epicenter theory the elastic-rebound theory
the fault theory the Richter theory

25. A seismograph left on the moon could be used to determine: the thickness of the moon's lithosphere the exact distance between Earth and the moon
the composition of the moon's atmosphere the gravitational force between Earth and the moon

26. A state with little need for reliable earthquake forecasts is: Alaska California
Missouri Wyoming

27. How many earthquakes occur every year? one thousand one hundred thousand
one million one hundred million

28. This type of wave produces vertical motion and travels only through rock. compressional waves shear waves
transverse waves surface waves

29. Expansion and contraction of the rock material through which a wave passes is a characteristic of: compressional waves shear waves
transverse waves surface waves

30. _____ are also known as "S waves." Compressional waves Shear waves
Transverse waves Surface waves

2007-11-28 12:05:12 · 2 answers · asked by Anonymous in Earth Sciences & Geology

change the standform form equation x-3y= -4 to slope intercept form please?

2007-11-28 12:05:05 · 19 answers · asked by *click* 3 in Mathematics

2007-11-28 12:04:11 · 1 answers · asked by Anonymous in Chemistry

can you tell me how to round off 00507506 to four significant figures?

2007-11-28 12:03:30 · 4 answers · asked by Anonymous in Mathematics

If the distance between the planet and the sun were increased, withough altering either of the planets period of revoution or the period pf the planets rotation about its own axis, would the time difference between a solar day and a sidereal day increase or decrease???

2007-11-28 12:03:11 · 3 answers · asked by emmiloulou 1 in Astronomy & Space

Please help! The only help the instructions offer is to try writing out the equation for the ionization of aluminum sulfate. It doesn't help. I've tried everything I could think of involving the molar ratio of aluminum sulfate. I can't begin solve this with so little info.

2007-11-28 12:02:51 · 1 answers · asked by Haifa Z 1 in Chemistry

an astronaut lands on an earthlike planet and drops a small lead ball with a mass of 76.5g from the top of her spaceship.the point of release is 16m above the surface of the planet & the ball takes 2.2 s to reach the ground. the astronaut's mass on earth is 68.5kg. her wieght on th planet is?

2007-11-28 12:01:09 · 2 answers · asked by Anonymous in Physics

doug hits a hockey puck, giving it an initial velocity of 6.0 m/s. if the coefficient of kinetic friction between ice and puck is 0.02, how far will the puck slide before stopping?

2007-11-28 11:57:23 · 1 answers · asked by Anonymous in Physics

Suppose your favourite AM radio stattion broadcasts at a frequency of 1150 kHz. What is the wavelengh, in centimeters, of the radiation from the station?

Please make it clear so I am able to understand.

Thanks

2007-11-28 11:56:54 · 2 answers · asked by Sina 2 in Chemistry

2007-11-28 11:53:57 · 7 answers · asked by Anonymous in Mathematics

a man pulls a sled at a constant velocity across a horizontal snow surface. if a force of 60N is being applied to the sled rope at an angle of 53 degrees to the ground, what's the force of friction between the sled and snow?

2007-11-28 11:53:55 · 2 answers · asked by Anonymous in Physics

Plz lemme no if u no the answers 2 any or all these questions

1) Let a = (1, 8, 1) and b = (3, 3, 4) be vectors.
Compute the cross product aXb. (?,? ,?)

2) If a = i + 10j + k and b = i + 19j + k, find a unit vector with positive first coordinate orthogonal to both a and b.
_i + _j + _k

3)Find a unit vector with positive first coordinate that is orthogonal to the plane through the points P = (5, 2, 0), Q = (9, 6, 4), and R = (9, 6, 7).
(?,?,?)

4)Find the parametric equations for the line through the point P = (-2, 3, 0) that is perpendicular to the plane 1x - 5y + 0z = 1.
Use "t" as your variable, t = 0 should correspond to P, and the velocity vector of the line should be the same as the standard normal vector of the plane. x= y= z=

At what point Q does this line intersect the yz-plane? Q=(?,?,?)

5)) Consider the two lines
L1: x = -2t, y = 1 + 2t, z = 3t and
L2: x = -8 + 4s,y = 0 + 5s, z = 5 + 1s

Find the point of intersection of the two lines.
P = (, , )

2007-11-28 11:53:35 · 1 answers · asked by Anonymous in Mathematics

I got into a discussion at school with a teacher about this and I was just curious to know what others thought.

2007-11-28 11:47:47 · 9 answers · asked by nanna 1 in Astronomy & Space

Please Site your source.

2007-11-28 11:46:56 · 5 answers · asked by a person wanting answers 1 in Geography

please

2007-11-28 11:46:30 · 2 answers · asked by Ah!:D 3 in Engineering

A smokestack deposits soot on the ground with a concentration inversely proportional to the square of the distance from the stack. With two smokestacks 20 miles apart, he concentration of the combined deposits on the line joining them, at a distance [x] from one stack is given by,

S = (k1/x^2) + (k2/[20-x]^2)

where k1 and k2 are positive constants which depend on the quantity of smoke each stack is emitting. If k1 = 7k2, find the point on the line joining the stacks where the concentration of the deposit is a MINIMUM.

2007-11-28 11:42:11 · 1 answers · asked by hello. 1 in Mathematics

Is there a correlation between left-handedness and other seemingly unrelated characteristics?

2007-11-28 11:41:17 · 3 answers · asked by marc 2 in Biology

2007-11-28 11:38:42 · 4 answers · asked by piinkpolkadots 1 in Weather