Science & Mathematics - 1 October 2007

What is the difference between the translations y=kf(x) and y=f(kx)

2007-10-01 14:02:47 · 3 answers · asked by To-the-Stars 4 in Mathematics

time vs. position
0--------------- 0
2----------------4
4---------------6.5
6---------------8.5
8---------------14
10-------------14
12-------------14
14-------------14
16-------------14
18-------------14
20-------------14
22-------------11
24------------ 6.2
26-------------0

Try to use the graph above

calculate the average acceleration for the time period t=8 & t=10

draw a vector to show this acceleration

suppose that there is a passenger of mass 70kg in the elevator calculate the apparent weight of the passenger at t=4s

2007-10-01 14:02:24 · 1 answers · asked by Kyle 1 in Physics

2007-10-01 13:59:33 · 10 answers · asked by alysiawilford 1 in Agriculture

Seventy-two identical banquet dinners cost a total of $_67.9_. (Sorry, I could not remember the first and last digits. ) How much did one dinner cost?

2007-10-01 13:55:05 · 2 answers · asked by big daddy 2 in Mathematics

lime as x goes to infinity sin x?

They both don't exist right? because it oscillates too much?

2007-10-01 13:47:00 · 4 answers · asked by xblah900x 1 in Mathematics

A skier is accelerating down a 30 degree hill at 3.80 m/s^2. What is the vertical component of her acceleration? How long will it take her to reach the bottom off the hill, assuming she starts from rest and accelerates uniformly, if the elevation change is 335 m. Please show/explain work clearly.

2007-10-01 13:45:05 · 1 answers · asked by nirmal 1 in Physics

2007-10-01 13:44:18 · 3 answers · asked by Chrispy97 1 in Biology

10g of a fuel are burned under a calorimeter containing 200g of H20. The temperature of water increases from 15°C to 55°C. Calculate the total heat produced (in joules) and the heat of combustion per gram of fuel.

THANK YOU!

2007-10-01 13:43:45 · 2 answers · asked by carsmithol 2 in Chemistry

This is a new discovery, some debate that our solar system is originally from the Sagitarrius Dwarf galaxy which is now breaking up as it crosses into the path of the Milky Way. If this is the case, our system will be shifting gears and begin to flow with the Milky Way in the process of being absorbed. This could have an astronomical effect on our planet and thus life as we know it. This will also change how the planets of our system is lined up and thus could possibly explain why the Mayan calendar ends at the year 2012-- the estimated time that planets will complete their re-alignment and thus a new system will be necessary.
Of course much is debated, however it is known fact that a complete other solar system will be raining down directly over top of us. So, what do you think would be the wise thing for us to do? We know enough to protect ourselves while driving-- seat belts; airbags; and double reinforced steel doors save lives. Shouldn't we be looing to shore up our home?!!

2007-10-01 13:42:52 · 7 answers · asked by MOCEAN 1 in Astronomy & Space

2007-10-01 13:40:34 · 8 answers · asked by Anonymous in Other - Science

I have a project for Biology due Wednesday and I need them ASAP! -Thanx

2007-10-01 13:37:08 · 1 answers · asked by Anonymous in Botany

2007-10-01 13:34:48 · 4 answers · asked by Anonymous in Weather

R^2-------> R^3
L(x) = x1b1 + x2b2 + (x1+x2)b3
where x = (x1,x2)
b1 = (1,0,1)
b2 = (1,1,0)
b3 = (0,1,1)

2007-10-01 13:32:58 · 2 answers · asked by Anonymous in Mathematics

For example, how can paleontologists tell if the Marsupial Lion had a pouch? What kind of evidence is there to tell from a Placental from a Marsupial from millions of years ago?

2007-10-01 13:29:21 · 2 answers · asked by The Prancing Stallion 2 in Zoology

is 121 a prime #?

2007-10-01 13:28:04 · 4 answers · asked by idk 1 in Mathematics

2007-10-01 13:27:16 · 2 answers · asked by modi_ponens 2 in Engineering

I don't want to die or anything

2007-10-01 13:21:30 · 12 answers · asked by Isla 2 in Medicine

...acceleration of 1.8m/s/^2.
The car makes it 0.6 of the way around the circle before skidding off the track.
acceleration of gravity=9.8m/s^2
What is the coeffcient of static friction between the car and track??

2007-10-01 13:21:18 · 1 answers · asked by michael 1 in Physics

...to reduce 23.3 mL of a 0.374 M KMnO4 solution according to the following equation?

10 HI + 2 KMnO4 + 3 H2SO4 5 I2 + 2 MnSO4 + K2SO4 + 8 H2O

Can I please get some help from the chemistry people here?

2007-10-01 13:21:16 · 1 answers · asked by jtaylor 1 in Chemistry

You want to order a deli platter for a sports banquet. You need 12 pounds of meat and cheese. You want twice as much meat as cheese on the platter and an equal amount of ham and turkey. The price per pound is $4.95 for ham, $6.99 for turkey, $7.99 for roast beef, and $4.36 for cheese. How many pounds of each should you order if you plan to spend $69.24?

I have thought this over for about an hour and I just now realized that the word 'meat', in the first part refers to the beef, the turkey, AND the ham =(. I can't believe I've only gotten this far, everyone else in my class understood it, but I'm stumped. I need to make this data into equations so I can solve it using matrices. Don't tell me the answer, just sort of point me in the right direction if you can. Thanks ahead of time.

2007-10-01 13:18:31 · 1 answers · asked by Anonymous in Mathematics

Your aunt and uncle have been visiting at your home. Five minutes after they drive away, you realize that they forgot their luggage. You happen to know that they drive slowly, so you get in your car and drive to catch up with them. Your average speed is 10 miles an hour faster than their average speed, and you catch up with them in 25 minutes. How fast did you drive?

It says to use the following verbal model:

your speed = their speed + 10 miles

your speed x your time in hours = their speed x their time in hours

The answer in the back of the book says it's 60 mph. =/

2007-10-01 13:18:03 · 1 answers · asked by Anonymous in Mathematics

1) Sometimes people say that water is removed from clothes in a spin dryer by centrifugal force throwing the water outward. What is wrong with this statement?

2) A bucket of water can be whirled in a vertical circle without the water spilling out, even at the top of a circle when the bucket is upside down. Explain.

plz help.... :)

2007-10-01 13:17:05 · 1 answers · asked by Anonymous in Physics

i dont know the answer!! plz help!

2007-10-01 13:16:19 · 8 answers · asked by *BaBiI gUrL* 1 in Astronomy & Space

Accel. of gravity = 9.8m/s^2
What is the Net centripetal force needed to keep the car from skidding sideways?

If there were no friction between the car's tires and road, what would be the centripetal force provided just by the banking of the road??

Suppose the friction force is sufficient to keep the car from skidding. whats the magnitude of the Normal force exerted on the car by the road's surface???

What is the Magnitude of the Friction Force?

And what could be the lowest possible value of the static friction coeffcient that would prevent the car from skidding?


please help!

2007-10-01 13:13:26 · 1 answers · asked by michael 1 in Physics

A.) Write the equation to the tangent line to the prabola y=x^2 @ (a,a^2).
B.) Find all tangent lines to the parabola y = x^2 that pass through (0,-2).

----Now let (c,d) be a point which may or may not lie on the parabola.
C.) Make a conjecture as to how many tangent lines of the parabola pass through a given point (c,d). How does the answer depend on the point (c,d)?
D.) Give conditions on c and d which tells us whether we have exactly 0, 1 or 2 tangent lines through (c,d).
E.) What do these conditions tell us about the location of the point (c,d) with respect to the parabola?

Some help please? I am lost with this problem and it's due tomorrow.

2007-10-01 13:11:10 · 2 answers · asked by jtaylor 1 in Mathematics

The actual boiling point of octane is 125.7C. Calculate the error and the percent error. Need help! Thanks

2007-10-01 13:06:38 · 1 answers · asked by Sun 1 in Chemistry

2007-10-01 13:05:29 · 3 answers · asked by Anonymous in Geography

tensile strength of diamond?

resistance to pressure (diamond container 1cm thick spherical)?

2007-10-01 13:05:06 · 1 answers · asked by Anonymous in Engineering

Member since: February 03, 2007
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--% Best answer

weeniehead =]
S Math word problem?
Your aunt and uncle have been visiting at your home. Five minutes after they drive away, you realize that they forgot their luggage. You happen to know that they drive slowly, so you get in your car and drive to catch up with them. Your average speed is 10 miles an hour faster than their average speed, and you catch up with them in 25 minutes. How fast did you drive?

Please explain. =]

2007-10-01 13:02:09 · 3 answers · asked by yupp. 1 in Mathematics

Thanks for helping!
Please give educated answeres :)

2007-10-01 13:01:16 · 2 answers · asked by alex 1 in Astronomy & Space