Science & Mathematics - 7 November 2006

2006-11-07 12:13:02 · 7 answers · asked by ilove_serj 1 in Biology

marble 1 has an initial velocity of 15.5 m/s and collides elastically with marbles 2 and 3 which are at rest and touching one another. Marble 1 is twice the mass but equal size to the other two marbles. If marble 1 is directed right at the contact point of the other two marbles, find the velocity of (a) marble 2, (b) marble 3 and (c) marble 1.

2006-11-07 12:11:33 · 4 answers · asked by linkinpark_labc 1 in Physics

i was watching the vh1 movie totally awsome and they said thats what happens since would block the sunns gravitional pull for a few seconds.

yes i know not to believe everthing on tv but it seems like it could be true

2006-11-07 12:11:06 · 4 answers · asked by Anonymous in Astronomy & Space

2006-11-07 12:11:01 · 1 answers · asked by Anonymous in Zoology

Two 2.00 kg masses are connected by a 50.0 cm long rod of negligible mass. This rod can rotate in the vertical plane around a horizontal rotation axis through its middle. Initially assume the rod is balanced and sitting along the horizontal as shown below. Suddenly a 50.0 g spider drops onto one of the masses with a speed of 3.00 m/s. (a) What is the angular speed of the system just after the spider lands? (b) What is the fraction of kinetic energy after the spider lands to just before it lands? (c) Through what angle will the system rotate before coming to rest?

2006-11-07 12:09:43 · 1 answers · asked by linkinpark_labc 1 in Physics

My friend is one in this play about the ugly duckling

2006-11-07 12:06:46 · 2 answers · asked by Bee 4 in Zoology

2006-11-07 12:06:41 · 5 answers · asked by Tani 1 in Mathematics

This is a calculus question... If you could show me your steps as to how to get the answer I'd really appreciate it!

2006-11-07 12:05:27 · 3 answers · asked by Anonymous in Mathematics

simple ways for an erupton

2006-11-07 12:04:50 · 2 answers · asked by Anonymous in Earth Sciences & Geology

the problem was convert 3.0 times 10 to the 3rd calories and find joules?

2006-11-07 12:01:16 · 6 answers · asked by Traffic 4 in Mathematics

The poles are shifting at an apparently accelerating rate, but what would happen if the poles did swap ends and what would happen during this seemingly long process?

2006-11-07 12:00:29 · 6 answers · asked by oscaria 2 in Earth Sciences & Geology

2006-11-07 11:58:35 · 6 answers · asked by marjolein k 1 in Other - Science

I'm to fault for not going to lecture and missing the lecture on integrals.
I get the basics and trig. But I'm clueless about dividing and what not.
Help?

2006-11-07 11:57:54 · 6 answers · asked by velmakelly777 1 in Mathematics

2006-11-07 11:57:31 · 3 answers · asked by gloria g 1 in Mathematics

1, 2, 3, 5, (?)
multi choice ans:
a, 13
b, 8
c, 10
d, 7
explain ans. pls cheers

2006-11-07 11:57:18 · 16 answers · asked by lONDON_kiD 1 in Mathematics

2006-11-07 11:53:25 · 14 answers · asked by Ann M 1 in Mathematics

Someone PLEASE help, I'm not here so people can do my homework but I'm having trouble
A car accelerates southward due to a frictional force between the road and the tires.
a) In what directions the frictional force of the road on the tires? Why does that force exist?
* My answer is that the frictional force is opposite (north) of the tires. I say it exists because when 2 forces are pressed together closely it causes attraction between the two forces.
Am I right?
b) Is the frictional force static or kinetic? Explain your answer.
* I say that it's kinetic friction but I'm not sure why so please help.

7. In the kitchen, frcition sometimes helps and sometimes hinders.
a) Describe at leat two ways in which you can increase friction when you're trying to open a tight lid on a jar.
*** One way I say is pressing/pushing on the lid while opening and I can't think of another way.
b) What materials and methods can be used to decrease friction between food and a cooking surface?

2006-11-07 11:52:24 · 2 answers · asked by A 2 in Physics

2006-11-07 11:51:32 · 2 answers · asked by damanofdaday 1 in Astronomy & Space

13: A farmer cuts ice from his pond in winter and stores it in an ice house. He cuts blocks 9 inches thick, 2 feet wide, and 3 feet long. If the ice house has a capacity of 9000 cubic feet, how many blocks can he store?
1250
1557
1890
2000


14: A storage tank 8 feet x 10 feet and 12 feet high is lined with lead on the bottom and sides. What is the cost of the lining at 75 cents a square foot?
$384
$560
$465
$323


15: A tank carrier is cylindrical in shape and is 15' long and 3’ in diameter. How many gallons does it hold? (Remember, 1 cubic foot holds 7.48 gallons. Therefore, mulitply the volume in feet by 7.48 to find the number of gallons.) Round your answer to a whole number.
782 gal
775 gal
793 gal
803 gal


16: Oil and gas are pumped from the refineries to the coast through large pipes. One of these pipelines is made of cylindrical pipe 30 inches in diameter. About how many cubic feet does one mile of this pipe hold?
24,500 cu. ft
26,000 cu. ft
19,500 cu. ft
33,000 cu. ft


17: A can is 4 1/2 inches tall and 3 1/2 inches in diameter. A wrapper is put around the can from top to bottom. What is the area of the wrapper (assuming there is no overlap)? Ue 3.14 for π and round to get an answer here, or use 3 1/7 for π and get exactly one of these.
48 3/5 sq. in
49 1/2 sq. in
52 5/6 sq. in
57 3/4 sq. in


18: A cylindrical home storage hot water tank is 18 inches in diameter and 8 feet long. What is its capacity to the nearest gallon?
106 gal
203 gal
118 gal
137 gal


19: A heating system is made of 220' of pipe with outside diameter 2”. What is the available radiating surface? Round to a whole number.
106 sq. ft
111 sq. ft
113 sq. ft
115 sq. ft


20: Paraffin comes in blocks 3" X 5" and 1/2 " thick, 4 blocks in a package. It is melted and poured as a seal into the top of cylindrical jelly jars 2 1/2 inches in diameter, to a depth of 1/4 inch. How many jars can be sealed with one package of paraffin?
15.5
24
36
45.5


21: Find the cost of 500 pieces of lumber, 2" X 8", 18' at $180 per 1000 board feet.
$2160
$2500
$2230
$1980


22:


A plumb bob made of steel weighing 4 1/2 ounces per cubic inch is a hemisphere topped by a cone. Find its weight if it is 1" in radius and the cone is 1 1/2" high.
14 oz
15.6 oz
16.5 oz
17.1 oz


23: A lawn is 50' X 60'. During a rainstorm 0.25" of rain fell on the lawn. A sprinkling hose empties 60' of its length in one minute. The hose is 1/2" inside diameter. How long must the hose sprinkle to give the same amount of water as the rainstorm?
10 hr. 56 min.
15 hr. 10 min.
12 hr. 44 min.
12 hr. 8 min.


24: A cardboard carton is 15 inches by 24 inches and 18 inches high. It contains packages each of which occupies a space 1 1/2 inches x 2 inches, 3 inches deep. How many packages can be packed in the carton?
680
720
760
890

2006-11-07 11:47:10 · 3 answers · asked by Intellectual Paige 2 in Mathematics

2006-11-07 11:46:59 · 5 answers · asked by Anonymous in Mathematics

2006-11-07 11:46:58 · 11 answers · asked by you kno who! 1 in Engineering

2006-11-07 11:46:42 · 7 answers · asked by kitten83 2 in Physics

2006-11-07 11:44:55 · 5 answers · asked by Anonymous in Astronomy & Space

1) 6x^2=4-5x
2) 2y^2-3y=-4

2006-11-07 11:44:15 · 3 answers · asked by Lion 1 in Mathematics

2006-11-07 11:39:01 · 4 answers · asked by Adnan 1 in Biology

please help me

2006-11-07 11:38:00 · 20 answers · asked by Pooblah 2 in Mathematics

The mass of an object is defined as:
A the amount of matter in an object
B the amount of space an object occupies
C the density of an object
D the surface area of an object



The metric system unit for mass is:
A the meter
B the kilogram
C the pound
D the ounce




Which of the following objects have mass?
A Catalina's guitar amplifier
B Catalina's guitar pick
C The vibrating air around Catalina's amp when she is practicing
D All of the above

2006-11-07 11:37:21 · 5 answers · asked by maconheira 4 in Physics

how do you find the limit of a function with indeterminate form of infinity-infinity
like this one:
lim as x approaches 0 of (1/tan x) - (1/x)

2006-11-07 11:37:12 · 2 answers · asked by infiniti1113 3 in Mathematics

this is a question related to math.

2006-11-07 11:36:31 · 3 answers · asked by Dechristian G 1 in Mathematics

is there any practical use for math ? besides the daily addition and multiplication. i dont see any use for differenciation, curve sketching etc in the future. can you please help me appreciate math more so i have more motivation to study it

thank you !

2006-11-07 11:36:04 · 7 answers · asked by Anonymous in Mathematics