Science & Mathematics - 19 November 2006

How can a spark flash just from a simple hit? Can someone explain that to me like I'm a 5 year old?

2006-11-19 10:09:08 · 4 answers · asked by Anonymous in Physics

20) Which molecule is nonpolar and has a synnnetrical shape?
A) NH3
B) CH4
C) H20
D) HCI

24)Which type of bond exists in a molecule of hydrogen iodide?
A)a polar covalent bond with an electronegativity difference ofzero
B)a polar covalent bond with an electronegativity difference between zero and 1.7
C)a nonpolar covalent bond with an electronegativity difference between zero and 1.7
D) a nonpolar covalent bond with an electronegativity difference ofzero

25)Which compound has the greatest possible number of isomers?
A) ethane B) pentane C) butane D) propane

27)Which combination of atoms can form a polar covalent bond?
A) Na and Br B) N and N C) H and Br
D) H and H

28) What is the total number of pairs of electrons represented by dashes (-) in the structural formula H- C _=_ C - H ? between the two C's it is a Triple line.
A) 10
B) 4
C) 5
D) 8

29)Which compound is'a synthetic polymer?
A) cellulose B) nylon C) protein D) starch

2006-11-19 10:09:08 · 2 answers · asked by James O 1 in Chemistry

1. The gravitatinal force that exerts on the moon equals 2.03*10 to 20th power N. The moon's mass 7.35*10 to the 22 power kg. What is the acceleration of the moon due to Earth's gravitational pull?

2006-11-19 10:08:46 · 2 answers · asked by Sarah S 1 in Astronomy & Space

(like the best packaging material for a fragile)

2006-11-19 10:07:28 · 4 answers · asked by soccerbballfanatic515 2 in Engineering

2006-11-19 10:07:05 · 4 answers · asked by matt 2 in Astronomy & Space

2006-11-19 10:05:41 · 7 answers · asked by aidaz 2 in Zoology

2006-11-19 10:05:07 · 5 answers · asked by merviedz trespassers 3 in Other - Science

2006-11-19 10:01:05 · 6 answers · asked by merviedz trespassers 3 in Astronomy & Space

2006-11-19 09:59:04 · 4 answers · asked by merviedz trespassers 3 in Physics

is there a difference between the buffalo and the bison?
or are the terms interchangeable?
or both?

2006-11-19 09:58:46 · 11 answers · asked by Anonymous in Zoology

2006-11-19 09:56:28 · 9 answers · asked by Anonymous in Biology

how many of you guys have PPP?

2006-11-19 09:55:40 · 4 answers · asked by Poseidon 2 in Medicine

2006-11-19 09:54:53 · 2 answers · asked by micheal 1 in Zoology

Just like vanishing act or becoming invisible. can be compared with a 'startrek' style phenomena.

2006-11-19 09:54:16 · 5 answers · asked by MAHESH 1 in Physics

im 14 and until i was 5 my eyes were blue and then they turned brown and up until latly they turned to a reall light green idky can u tell me what is going on

2006-11-19 09:53:58 · 6 answers · asked by friendofapoet 1 in Biology

Question Details:CO2(g) + H2(g) ↔ H2O(g) + CO(g) When H2(g) is mixed with CO2(g) at 2,000 K, equilib­rium is achieved according to the equation above. [CO] = 0.385 M [H2O] = 0.385 M [H2] = 0.365 M [CO2] = 0.465 M And if it helps Kc = 0.87

2006-11-19 09:52:29 · 4 answers · asked by cheezzznitz 5 in Chemistry

2006-11-19 09:52:26 · 3 answers · asked by kunvar k 1 in Other - Science

2006-11-19 09:51:19 · 6 answers · asked by Anonymous in Mathematics

Need help with this problem. Someone please explain. Thanks a lot!

You have a boat with a motor that propels it at vboat = 4.5 m/s relative to the water. You point it directly across the river and find that when you reach the other side, you have traveled a total distance of 27 m and wound up 14 m downstream. What is the speed of the current?

2006-11-19 09:51:07 · 3 answers · asked by venom90011@sbcglobal.net 1 in Physics

is it true that its called a cackle? it just kind of sounds wierd (no offense to the hyenas).....

well, anyway. i need to know for my story for school, so i need to know.

any other info. would be apprecited =)

2006-11-19 09:49:36 · 5 answers · asked by </3 3 in Zoology

2006-11-19 09:49:36 · 18 answers · asked by madznmada 1 in Mathematics

A box slides down a 34.0° ramp with an acceleration of 1.22 m/s2. Determine the coefficient of kinetic friction between the box and the ramp.
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A person pushes a shopping cart with a force of 91 N acting down at 45°. If the cart travels at a constant speed of 1.4 m/s, what is the value of the combined retarding force acting horizontally on the cart due to friction and air drag? [Hint: It is the horizontal component of the force that drives the cart forward. The constant speed tells you that Fx = ma = 0.]
N
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You slide a 325-N trunk up a 19.0° inclined plane with a constant velocity by exerting a force of 213 N parallel to the plane.
(a) What is the component of the trunk's weight parallel to the plane?
N
(b) What is the sum of your applied force, friction, and the parallel component of the trunk's weight?
N
Why?

2006-11-19 09:49:16 · 3 answers · asked by ckielblock18 1 in Physics

anyone hear about the myan calander ending...dec. 2012 ? and if so what are your thoughts? some believe its the end of the world. i watched this on the history channel

2006-11-19 09:48:11 · 15 answers · asked by reactor215 2 in Astronomy & Space

A 36 kg crate, originally at rest, is dragged across a floor by pulling on a rope inclined 15° above the horizontal.The coefficients of static and kinetic friction are respectively µs=0.62 and µk = 0.53, and the tension in the rope is F=222 N.
(a) What is the magnitude of the normal force?
N
(b) What is the minimum horizontal force needed to start the crate?
N
(c)What is the magnitude of the friction force acting on the crate?
N
(d) What is the magnitude of the acceleration of the crate?
m/s2
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A 40.0 kg wagon is towed up a hill inclined at 18.8° with respect to the horizontal. The tow rope is parallel to the incline and has a tension of 140 N in it. Assume that the wagon starts from rest at the bottom of the hill, and neglect friction. How fast is the wagon going after moving 75 m up the hill?
m/s
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2006-11-19 09:46:39 · 1 answers · asked by ckielblock18 1 in Physics

2006-11-19 09:46:24 · 7 answers · asked by annie 1 in Chemistry

how much it weighs,
how long it is,
how long its tentacles are,
how many pores on its tentacles,
what its mouth is like,
and what its tongue is like.
etc.

it is not homework I'm just interested in it so I want any info.

2006-11-19 09:45:46 · 2 answers · asked by sfastmix 2 in Zoology

2006-11-19 09:42:12 · 7 answers · asked by Anonymous in Engineering

2006-11-19 09:41:22 · 7 answers · asked by Arabela R 1 in Geography

2006-11-19 09:38:24 · 11 answers · asked by Anonymous in Mathematics

2006-11-19 09:37:30 · 7 answers · asked by Anonymous in Mathematics