Science & Mathematics - 31 October 2006

right now am am getting a 77.02% and i think that my grade is wrong. My test grade is 73.75%, my homework grade is 92.50%, and my quiz grade is 77.73%. can anyone help me adn figure out if taht is the right grade or not!?!??!

2006-10-31 07:52:00 · 4 answers · asked by Anonymous in Mathematics

2006-10-31 07:47:27 · 11 answers · asked by position28 4 in Astronomy & Space

Solve the following equation for by using the quadratic formula:
4x^2-4x-5=0

x=

(If there is more than one solution, separate them with commas.)

2006-10-31 07:45:06 · 8 answers · asked by SCHNITZEL 1 in Mathematics

Two coherent sources A and B are d = 4 lemda meters apart, lemda being the wave-length of the light emitted by the sources.
An obsever goes arourd the two sources, along a circle of large radius D centered midway between A and B.
How many bright points would this observer come across in all as he completes the circular journey ?

2006-10-31 07:44:04 · 2 answers · asked by usarora1 3 in Engineering

2006-10-31 07:43:47 · 6 answers · asked by shortiec 1 in Earth Sciences & Geology

mean??

2006-10-31 07:43:26 · 3 answers · asked by imsoCOOL_bejealous 2 in Astronomy & Space

2006-10-31 07:42:53 · 2 answers · asked by Anonymous in Physics

BONGA FIELD.

2006-10-31 07:42:05 · 2 answers · asked by Leo 4 in Earth Sciences & Geology

an object is traveling around a circle with a radius of 5 cm. if in 20 sec a central angle of 1/3 radian is swept out, what is the angular speed of the object? what is its linear speed?

i know i have use s=r(beta), other than that, i'm at a lost. thanks for the help.

2006-10-31 07:41:01 · 3 answers · asked by shih rips 6 in Mathematics

which of the quantum numbers are allowed:
A.(n=4, 1=3, and m1=2)
B.(n=3, 1=3, and m1=2)
C. (n=3, 1=2, and m1=3)
D, (n=2, 1=3, and m1=1)

2006-10-31 07:39:17 · 1 answers · asked by ohman33 1 in Chemistry

2006-10-31 07:36:58 · 9 answers · asked by money_m.rich 1 in Mathematics

I live in DC, where it is currently under 60 degrees. However, the heat has been turned on in our dorm rooms, and so it is usually warm in our room. When we want to cool down, we open the window to let air in. However, for days we could not seem to change the temperature of the room; with our windows wide open we still had a warm room. It appeared that no air was coming in from outside. Just today, I noticed that if I left the door to our room (the door to the hallway) open, wind would rush in through the windows, thus cooling the room. I was wondering if anybody had any idea why this is true--I can only think of how air works in a vacuum, but that doesn't seem to apply.

2006-10-31 07:35:31 · 6 answers · asked by Anonymous in Weather

2006-10-31 07:34:46 · 1 answers · asked by tuesdaysdad 1 in Chemistry

2006-10-31 07:33:37 · 5 answers · asked by money_m.rich 1 in Mathematics

2006-10-31 07:31:03 · 5 answers · asked by money_m.rich 1 in Mathematics

2006-10-31 07:28:36 · 10 answers · asked by dorky1 1 in Mathematics

2006-10-31 07:27:56 · 4 answers · asked by money_m.rich 1 in Mathematics

(smooth & vertical). A person who weighs 356 N stands 3.1 m up the ladder. The foot of the ladder rests on the floor 8.47 m from the wall.

Calculate the force exerted by the wall (in N)?

Calculate the normal force exerted by the floor on the ladder (in N)?

2006-10-31 07:27:45 · 1 answers · asked by Dee 4 in Physics

What are the units for messuring the distance from the Earth to another planet, moon, or sun?

2006-10-31 07:26:40 · 3 answers · asked by answers4evry1 2 in Astronomy & Space

I still have no idea how to do proffs in geometry!

2006-10-31 07:25:56 · 4 answers · asked by brighton 3 in Mathematics

Is Carmen Sandiego today? I haven't see her?

2006-10-31 07:24:47 · 4 answers · asked by helpme1 5 in Geography

How long can you survive in freezing water? If the temperature is say 35 degrees outside. Will the water be 36 degrees as well? Or can the water have a colder temperature than the air outside?

2006-10-31 07:24:25 · 6 answers · asked by t_lued03 2 in Earth Sciences & Geology

2006-10-31 07:24:09 · 1 answers · asked by Nickname 1 in Biology

I'm doing a biology experiment testing the difference in rate of respiration between maggots and flies. I want to ensure that they are of the same mass, but I am finding that the flies weigh less than maggots? Is this correct - or are the flies supposed to be freezed first? Or how else can I weigh flies?

2006-10-31 07:24:05 · 5 answers · asked by deli07 2 in Zoology

The size of it the color and the name of the different sections located on the atom.

2006-10-31 07:22:33 · 3 answers · asked by karla16jc 1 in Chemistry

2006-10-31 07:22:28 · 4 answers · asked by money_m.rich 1 in Mathematics

who?

2006-10-31 07:19:47 · 4 answers · asked by It's me 1 in Zoology

white boys and white girls dont have high cheekbones only indians and asians do plus filpinos have high cheekbones a white girl told me shes never seen a white girl with high cheekbones

2006-10-31 07:16:15 · 3 answers · asked by Anonymous in Biology

A horizontal force of 840 N is needed to drag a crate across a horizontal floor with a constant speed. You drag the crate using a rope held at an angle of 28°.

What force do you exert on the rope?

How much work do you do on the crate when moving it 22 m?

If you complete the job in 8 s, what power is developed (in kW)?

How would you solve these problems? With what formulas?

2006-10-31 07:16:13 · 4 answers · asked by Isabel G 1 in Physics

2006-10-31 07:13:24 · 7 answers · asked by goring 6 in Physics