Physics - January 2007

2007-01-14 08:53:28 · 7 answers · asked by Anonymous

2007-01-14 08:51:48 · 3 answers · asked by Anonymous

2007-01-14 08:49:56 · 1 answers · asked by Anonymous

2007-01-14 08:48:47 · 7 answers · asked by Anonymous

2007-01-14 08:47:36 · 4 answers · asked by Anonymous

2007-01-14 08:46:13 · 2 answers · asked by Anonymous

2007-01-14 08:44:59 · 4 answers · asked by Anonymous

2007-01-14 08:42:22 · 7 answers · asked by Anonymous

2007-01-14 08:32:34 · 6 answers · asked by Marisa7993 2

2007-01-14 08:13:24 · 12 answers · asked by pilsung_shopper 2

Does anyone remember how to do the primary science project with the bowl of water and the glass with a paper towel stuffed inside? I remember that You place the glass down directly in the center of the bowl and the paper towel stays dry...Help Please

2007-01-14 08:01:17 · 1 answers · asked by pickievickie 1

2007-01-14 08:00:38 · 2 answers · asked by Ej 1

The ramp (picture link) is 18 meters long and 4.5 meters high.

*picture link: http://img206.imageshack.us/img206/2450/scangd4.jpg

a.What force, parrallel to the ramp (Fa) is required to slide a 25 kg box at constant speed to the top of the ramp if friction is disregarded?
b. What is the ideal mechanical advantage of the ramp?
c. What are the real mechanical advantage and the efficiency of the ramp if a parrallel force of 75 N is actually required?

Please help me with this problem.
I'm having trouble understanding it.

I asked this question before, but I was unable to get any help.

2007-01-14 07:56:57 · 2 answers · asked by swimmertommy 1

The ramp (picture link) is 18 meters long and 4.5 meters high.

*picture link: http://img206.imageshack.us/img206/2450/scangd4.jpg

a.What force, parrallel to the ramp (Fa) is required to slide a 25 kg box at constant speed to the top of the ramp if friction is disregarded?
b. What is the ideal Mechanical Advantage of the ramp?
c. What are the real Mechanical Advantage and the efficiency of the ramp if a parrallel force of 75 N is actually required?

Please help me with this problem.
I'm having trouble understanding it.

I asked this question before, but I was unable to get any help.

2007-01-14 07:25:44 · 1 answers · asked by vicky p 1

The vehicle has to be made just as a working prototype to run for short distance on a flat surface, which has to powered only by gravity and nothing sort of spring rubber band, string etc

2007-01-14 07:18:38 · 5 answers · asked by KT 2

2007-01-14 07:04:04 · 5 answers · asked by rednika2000 1

2007-01-14 06:57:14 · 10 answers · asked by scluby2k 2

If we have equal Voltage and Resistance, which light bulb is brighter in a parallel system? in a series system? Are they equal in both cases?

2007-01-14 06:51:32 · 5 answers · asked by Anonymous

2007-01-14 06:41:25 · 6 answers · asked by Charles m 1

2007-01-14 06:25:38 · 5 answers · asked by Chel 1

if you drill a hole in the U.S. ,through the center of the earth, to the other side to, lets say china. and then someone in the U.S. jumped in the hole and was falling and reached the center of the earth. does he keeping falling until he flies out of the hole on the china side or does gravity reverse and he starts going back towards U.S. Basically its a question about gravity. i hope you understand what i mean. a little bit hard to explain it while typing. i asked my brother and he knew what i meant so it shouldnt be too hard. its a hypothetical question. i know you cant drill through center of earth. well atleast with todays technology.

2007-01-14 06:19:05 · 9 answers · asked by cparkmi331 3

2007-01-14 05:51:45 · 3 answers · asked by Anonymous

A uniform beam has a mass of 236 kg and has 5 forces working on it. F1 and F2 are pushing upward at each end of the beam while F3 (3900 N), F4 (2990 N), and F5 (1960 N) are pushing downward in between the two upward forces.

There are four distances. D1 (1.84 m) is between F1 and F3. D2 (4.16 m) is between F3 and F4. D3 (2.90 m) is between F4 and F5. D4 (1.02 m) is between F5 and F2.

Calculate F1 and F2 for the beam.

Can anyone explain how to do this problem?? I have drawn a free-body diagram, but I am at a complete loss as to what to do now.

2007-01-14 05:44:56 · 8 answers · asked by Anonymous

if a particle travel through time then its existence in this time will be over and total mass or equivalent energy of the universe at this time will decrease,and at same time energy of the universe to which it has been transported increase(by an amount equal to its own energy) defying conservation law.

2007-01-14 05:44:31 · 8 answers · asked by Anonymous

a.) decrease by a factor of 4
b.) remain the same
c.) increase by a factor of 2
d.) decrease by a factor of 2
e.) increase by a factor of 4

The answer is d.) decrease by a factor of 2, but I got a.) decrease by a factor of 4. What did I do wrong?

The equation you would use is F = (GM1M2) / r^2... right? (where G equals gravitational constant, and you know what the rest of the variables represent)

Help, please. ASAP.

2007-01-14 05:33:10 · 5 answers · asked by jhchiu2004 1

kg? g?

2007-01-14 05:24:12 · 11 answers · asked by rockergrl202 3

A car is pushed along by the road with 4000 N of force so that it accelerates at 2m/s squared. What is the mass of the car?

plz explain

2007-01-14 05:22:14 · 6 answers · asked by rockergrl202 3

2007-01-14 05:18:11 · 8 answers · asked by Faris G 1

2007-01-14 05:16:18 · 11 answers · asked by Faris G 1

A car has a momentum of 22,000 kg m/s and is traveling at 22 m/s. The mass of the car is _____

a. 484000kg
b. 1000kg
c.2000kg

plz explain how you got ur answer

2007-01-14 05:12:55 · 4 answers · asked by rockergrl202 3