Science & Mathematics - 9 September 2007

2007-09-09 20:06:46 · 27 answers · asked by Grinning Football plinny younger 7 in Zoology

2007-09-09 20:04:07 · 4 answers · asked by Aken 3 in Mathematics

2007-09-09 20:00:11 · 6 answers · asked by mimi 1 in Biology

2007-09-09 19:34:25 · 2 answers · asked by Legally Blonde 1 in Zoology

2007-09-09 19:32:20 · 3 answers · asked by pa99 1 in Mathematics

2007-09-09 19:25:26 · 4 answers · asked by telly-tell 2 in Earth Sciences & Geology

Also, if you were to take 2 everyday for quite a while, how long untill it becomes bad for your health? (Using them for migrains)

2007-09-09 19:16:32 · 4 answers · asked by Anonymous in Medicine

2007-09-09 19:15:49 · 5 answers · asked by Mei T 2 in Weather

In my opinion we can see an object by the light reflecting from the object. But If the light is under the specises, I think, it passes through the object and we cannot see the light reflecting from the object. so we can't see the object but see just the light itself.

What's wrong in my thoughts?

2007-09-09 18:49:40 · 4 answers · asked by Anonymous in Physics

A major leaguer hits a baseball so that it leaves the bat at a speed of 28.5m/s and at an angle of 36.9 degrees above the horizontal. You can ignore air resistance.

At what two times is the baseball at a height of 9.50m above the point at which it left the bat?

2007-09-09 18:47:06 · 3 answers · asked by ! 2 in Physics

which pharmacy schools are the easiest to get into, in the US

2007-09-09 18:40:51 · 2 answers · asked by Abc 3 in Medicine

Since the time distance issue of space travel seems to make UFO's coming from other star systems impractical, maybe they come from our own planet? Is going back in time a possiblity? Is it true that the past, present, and future can exist at the same time?

2007-09-09 18:38:46 · 12 answers · asked by quidproquo888 3 in Astronomy & Space

2007-09-09 18:20:22 · 6 answers · asked by Lim S 3 in Physics

A 4.04 kg block located on a horizontal floor is pulled by a cord that exerts a force F = 10.3 N at an angle q = 16.0° above the horizontal. The coefficient of kinetic friction between the block and the floor is 0.070. What is the speed of the block 3.70 s after it starts moving?
I know that static friction can be ignored. Any idea how to solve this? I worked on it for over an hour. Please help.
Thank you....

2007-09-09 18:13:17 · 3 answers · asked by moonlightNY 1 in Physics

2007-09-09 18:10:38 · 9 answers · asked by Anonymous in Biology

1)2*3,4*6,6*9,8*12,...

2)1/3,2/5,3/7,4/9,....

2007-09-09 18:06:34 · 2 answers · asked by Anonymous in Mathematics

When a deep body of water cools, How and why do floating icebergs insulate the water below it and prevent the body of water from freezing?

2007-09-09 18:04:57 · 3 answers · asked by EGGO 2 in Earth Sciences & Geology

i know- i need to learn this on my own. i had a lot of other work and a teacher who i cant even understand, so if you could just help me out w/ any of these, it'd be great.....

A ranger in a national park is driving at 35 km/h when a deer jumps onto the road 50 m ahead of the vehicle. After a reaction time of t s, the ranger applies the brakes to produce an acceleration of -2.40 m/s2. What is the maximum reaction time allowed if the ranger is to avoid hitting the deer?

An elevator is moving upward at 1.01 m/s when it experiences an acceleration 0.32 m/s2 downward, over a distance of 0.84 m. What will its final velocity be?

A rocket moves upward, starting from rest with an acceleration of 27.0 m/s2 for 4.72 s. It runs out of fuel at the end of the 4.72 s but does not stop. How high does it rise above the ground?

2007-09-09 18:03:31 · 3 answers · asked by tar_heel_fan_44 2 in Physics

This is from linear algebra...
Can you help me solve a problem that involves finding the equation of a plane containing a given point and perpendicular to a given line? Thanks

2007-09-09 17:50:14 · 1 answers · asked by AlaskaGirl 4 in Mathematics

Can you explain to me how to solve a problem such as this?
Find the vector x in the opposite direction of a GIVEN vector u such that the length of the original vector x equals a certain GIVEN number?
Thanks.

2007-09-09 17:46:23 · 2 answers · asked by AlaskaGirl 4 in Mathematics

How to answer this?

Math help! Related rates?
2. A Street light is 15 meters high. A man 1.687 meters tall walks away from the street light at a rate of 6 meters per minute.

a. At what rate is the tip of his shadow moving when he is 5 meters from the street light?
b. At what rate is the length of his shadow increasing?

Solution:
Please teach me how to do no. 2

2007-09-09 17:44:11 · 3 answers · asked by Patricia 2 in Mathematics

How to solve the belowing question?
A solid sphere with a diameter of 0.17m is released from rest, it then rolls without slipping down a ramp, dropping through a vertical height of 0.61m. The ball leaves the bottom of the ramp, which is 1.22m above the floor, moving horizontally.
Through what horizontal distance(d) does the ball move before landing?
How many revolutions does the ball make during its fall?

2007-09-09 17:43:25 · 3 answers · asked by クリスマス ^-^ 2 in Physics

2007-09-09 17:38:04 · 6 answers · asked by lirael1019 1 in Mathematics

A parachutist descending at a speed of 9.40 m/s loses a shoe at an altitude of 31.60 m.

(a) When does the shoe reach the ground?

(b) What is the velocity of the shoe just before it hits the ground?

2007-09-09 17:26:40 · 2 answers · asked by tar_heel_fan_44 2 in Physics

Okay so I feel like having a "Mental Health Day". I just dont want to go to school. I always feel like this on Sunday but I always go to school. My parents nevver give days off of school unless I am sick or I have a relative coming from another country. Tommorow is neither :(. I have finished all my homework and dont have any tests tommorow. I am also A Straight "A" student. I will be more then happy to make up the work too. I also have swore to myself I will not abuse this. I have already planned this. Should I do it.

2007-09-09 17:24:19 · 8 answers · asked by maytag 1 in Other - Science

Please explain!

2007-09-09 17:23:49 · 5 answers · asked by Anonymous in Biology

Wal-Mart sells thermometer ($2) and hot-water bottles ($6). In december, Wal-Mart total sales were 1,200 dollars. Customers bought 7 times as many therometers as hot-water bottles. How many of each did Wal-Mart sell?

I don't know how to set up the equation. Please I need someone to explain it.


Thank you.

2007-09-09 17:22:03 · 10 answers · asked by Anonymous in Mathematics

In the classroom demonstration where a volunteer strikes an anvil resting on the physics professor's chest will he lies reclined, the anvil shields the daring physics professor from most of the sledgehammer's:

a) momentum
b) kinetic energy
c)...both
d)...actually neither

2007-09-09 17:20:58 · 1 answers · asked by ? 6 in Physics

A golfer rides in a golf cart at a speed of 3.10 m/s for 30.0 s. She then gets out of the cart and starts walking at an average speed of 1.50 m/s. For how long (in seconds) must she walk if her average speed for the entire trip, riding and walking, is 2.50 m/s?

2007-09-09 17:17:53 · 1 answers · asked by puji831 1 in Physics

Can someone explain this please?

5w² + 38w = 63

2007-09-09 17:15:13 · 2 answers · asked by Anonymous in Mathematics