Science & Mathematics - 17 October 2006

2006-10-17 10:43:59 · 2 answers · asked by batista~rox 1 in Earth Sciences & Geology

2006-10-17 10:43:10 · 2 answers · asked by um yea hi 4 in Chemistry

2006-10-17 10:42:54 · 20 answers · asked by John H 1 in Zoology

PROBLEM #1:
Desert Sand is very hot in the day and very cool at night. What does this tell you about its specific heat?

PROBLEM #2:
What determines whether an object at a given time is a net absorber or a net emitter? Why?

When you answer this problems, please, specify which answer is for what.

2006-10-17 10:42:44 · 2 answers · asked by Gordito 1 in Physics

2006-10-17 10:42:40 · 2 answers · asked by tigerfan 1 in Biology

use the distrubitive property to rewrite the expression without parentheses.

2006-10-17 10:42:21 · 9 answers · asked by Cookie Gurl 1 in Mathematics

the ways you won't get blind when you look at the sun directly

2006-10-17 10:42:16 · 7 answers · asked by Anonymous in Astronomy & Space

After the Big Bang which to my understanding started as a single spot smaller than the dot at the end of this sentence and then has expanded to the current size of the universe. With my simple logic I would assume that the expansion would leave a every growing empty space at the center of the universe but I have never heard any one speak of it.

2006-10-17 10:42:08 · 6 answers · asked by the_news_junky 2 in Physics

After a snowstorm a girl and a boy decide to have a snowball fight. The girl uses a slingshot to shoot snowballs at the boy. Assume that the girl fires each snowball at an angle (-) from the ground and that the snowballs travel with an initial velocity of v0. HELP! I have no clue how to figure this one out!

2006-10-17 10:41:55 · 4 answers · asked by taintedlove463 1 in Physics

2006-10-17 10:41:36 · 7 answers · asked by Connor O 1 in Mathematics

Will a bag holding 15 kg of groceries that is lifted from the checkout conunter at an acceleration of 7.0 m/s^2 hold?

I need help putting the problem into an equation.

2006-10-17 10:40:41 · 1 answers · asked by swimmertommy 1 in Physics

everytime I mention evolution in a question, half my answers are always like, obviously you dont understand it or you wouldnt ask.

And no i am not one of those people who asks about why we still have monkeys.

2006-10-17 10:40:06 · 7 answers · asked by Don't Fear the Reaper 3 in Biology

2006-10-17 10:39:31 · 6 answers · asked by oxshortiexo6 1 in Biology

QUESTION #1:
Is cold the opposite of thermal energy or the lack of it? Why?

QUESTION #2:
Does a substance that heats up quickly have a high or a low specific heat capacity? Why?

QUESTION #3:
Why can't you establish whether you are running a high temperature by touching your own forehead?

When answering this ones, please, specify which answer is for what question. Thanks

2006-10-17 10:39:07 · 2 answers · asked by Gordito 1 in Physics

ok this is the problem: A storekeeper goes to the bank to get 10 dollers worth of change. He requests twice as many quarters as half dollars, twice as many dimes as quarters, three times as many nickles as dimes, and no pennies or dollars. How many of each coin did the storekeeper get? Thanks so much if you can answer it....or at least sorta figure it out or at least just get an equation for it would be fine and i will find the answer if u can just get the equation.......Thanks

2006-10-17 10:38:48 · 13 answers · asked by murphymurf 1 in Mathematics

2006-10-17 10:38:25 · 2 answers · asked by Sean H 2 in Engineering

2006-10-17 10:38:21 · 5 answers · asked by Hi 3 in Biology

Block 1 has mass M, block 2 has 2M, and block 3 has 2M. What is the coeffieent of kinetic friction between block 2 and the table?

Answer: Let the tensions of on the strings connecting m2 and m3 be T23, and that connectiong m2 and m1 be T12, respectively. Applying Newton's second law with FN= m2g in this case to the system we have

m3g - T = m3a
T23 - µk m2g - T12 = m2a
T12 - m1g = m1a

Adding up the three equations and using m1 = M, m2 = m3 = 2M, we obtain

2Mg- 2µk Mg - Mg = 5 Ma

With a = 0.5m/s^2 this yields µk = 0.372. Thus, the coefficient of kinetic friction is roughly µk = 0.37

If you can, please explain and show haw they solved for µk because I didn't understand that last part. Thank you

2006-10-17 10:38:03 · 1 answers · asked by gods1princesschanel 1 in Physics

Thinking out side of the box, is EVERYTHING possible in math? Such as 6=-9,348,393,423,842,340,983,202,934,029,384,092,834. is it possible for 2 to equal 9?

Please Explain

2006-10-17 10:37:45 · 5 answers · asked by mike 1 in Mathematics

2006-10-17 10:37:38 · 17 answers · asked by OK123 5 in Astronomy & Space

I need need with the following problems.

a. find the average acceleration of the dragster during this time interval.

b. what is the magnitude of the average net force on the dragster during this time?

c. assume that the driver has a mass of 68kg. What horizontal forces does the seat exert on the driver?

Especially the last part.

2006-10-17 10:37:08 · 1 answers · asked by swimmertommy 1 in Physics

2006-10-17 10:34:15 · 9 answers · asked by Anonymous in Medicine

Is in Physics

2006-10-17 10:33:31 · 4 answers · asked by Gordito 1 in Physics

2006-10-17 10:33:02 · 4 answers · asked by smile 123 1 in Chemistry

2006-10-17 10:32:14 · 15 answers · asked by ? 3 in Biology

equation:
log x + log (x + 15) = 2

I know since the equation doesn't give a "base" it is assumed as 10. So the next step would be to change this log equation into an exponential equation but how do I solve for "x" when the equation is x^2 + 15x=100 ? maybe my exponential equation is wrong. Thanks for your help.

2006-10-17 10:31:48 · 5 answers · asked by shih rips 6 in Mathematics

2006-10-17 10:30:57 · 4 answers · asked by OK123 5 in Astronomy & Space

with a second sphere that is initially at rest. The composite system moves with a speed equal to one-third the original speed of 2.66 kg sphere.

What is the mass of the second sphere (in units of kg).

2006-10-17 10:30:09 · 1 answers · asked by Dee 4 in Physics

1. What's the consumption of gold by the United States?
2. How is gold processed from its raw form?

2006-10-17 10:29:36 · 5 answers · asked by c00kies 5 in Earth Sciences & Geology

By beat evolution I mean, can humans select what we believe are desirable chracteristics and try to establish them preemptively, despite the fact that they run contrary to our current biology or adaptions.

2006-10-17 10:28:36 · 15 answers · asked by Don't Fear the Reaper 3 in Biology