Physics - December 2006

Is time travel really possible? It is after all a theory and not a scientific fact...

2006-12-03 11:14:05 · 9 answers · asked by kitty 2

For my masters thesis, i have suspended a large silica test mass on a loop of fine silk thread to isolate the mass from background noise.
Further welded to this mass is a silica slide. I excite the resonant modes of the slide using an electrostatic drive plate in a vacuum, and by measuring the rate at which they decay determine their mechanical loss factor. I am suspending the test mass + slide as a pendulum to reduce energy dissipation from the system. I am trying to find the right words to explain why suspending the system as a pendulum reduces energy dissipation away from the system, and reduces noise but i am struggling - please help!

2006-12-03 10:53:49 · 1 answers · asked by Anonymous

Im Currently studying physics but I lost interest along the way. Help me restore my interest. Thanks

2006-12-03 10:34:49 · 5 answers · asked by Samlovesjesea 1

2006-12-03 10:31:24 · 2 answers · asked by Elenore R 1

i have some question that involve nuclear equations and stuff im not sure what to do . e.g

carbon 14 (6 proton number) decays by beta minus emmison. copy and complete the following muclear equation for this decay. 14
6 C ---> X + .....

i dont know what to put please help. Thank you

2006-12-03 10:27:43 · 3 answers · asked by Jezza 2

A block of mass m = 2.02 kg slides down a 30.8 ° incline which is h = 3.46 m high. At the bottom, it strikes a block of mass M = 6.90 kg which is at rest on a horizontal surface. (Assume a smooth transition at the bottom of the incline.) If the collision is perfectly elastic, and friction can be ignored, determine the speed of the smaller block and larger box after the collision.

How would you determine the answer?

2006-12-03 10:20:56 · 1 answers · asked by Anonymous

Under standard conditions, the density of air is 1.293 kg/m3 and that of helium is 0.178 kg/m3. A spherical helium balloon lifts a basket plus cargo of mass 278.0 kg. What must be the minimum diameter of the spherical balloon?

2006-12-03 09:59:53 · 3 answers · asked by emmy 1

if we have 40, six-hundred pound men, streaking at 47 miles per hour, how long will it take these large men to streak 32 miles if they stop for 2 minutes at a hot dog stand and eat 400 frankfurters???

2006-12-03 09:21:12 · 6 answers · asked by bigschwinger 2

a car is traveling 22mi/hr and speeds up to 50mi/hr in 6 sec. what is the acceleration? i dont need the answer i would just like a formula. if you have any ideas or clues that would really help. thank you!

2006-12-03 09:20:51 · 4 answers · asked by Anonymous

2006-12-03 08:45:57 · 3 answers · asked by bouch- 1

2006-12-03 08:42:04 · 4 answers · asked by oanaveres 2

Why was there a need for it at the time?
Where did Einstein's inspiration come from?

2006-12-03 08:38:13 · 3 answers · asked by benabean87 2

2006-12-03 08:35:36 · 18 answers · asked by Siu02rk 3

the container's temperature has to go up to 100C but i dont think the water inside can boil. suggestions?

btw i dont know which category i should put it in so i put it in physics :-/

2006-12-03 08:34:47 · 9 answers · asked by szx 2

A box is given a push so that it slides across the floor. How far will it go, given that the coefficient of kinetic friction is 0.18 and the push imparts an initial speed of 4.3 m/s?
m

4.3/.18= 23. 89

2006-12-03 08:28:36 · 3 answers · asked by sleepy 1

2006-12-03 08:20:05 · 4 answers · asked by pasha p 1

crap i need help lol :S

2006-12-03 08:17:40 · 8 answers · asked by laydee.marmalade 1

we have 250, six-hundred pound men, riding in a bus traveling at 200 miles per hour, if there is a large plate of sausage on the bus, and these large men charge the plate of sausage, thus pissing off the bus driver and making him stop the bus for 10 minutes to clean up the sausage, what is the average speed of this bus over a 100 miles course figuring the driver immediately speeds back up to the 200 mile per hour speed????

2006-12-03 08:06:17 · 2 answers · asked by bigschwinger 2

Voltage is 'potential difference', but difference between what?

2006-12-03 07:57:48 · 6 answers · asked by claireybearyfairy 4

A satellite is in a circular orbit just above the surface of the Moon. What are the satellite's acceleration, speed, and the period of the satellite orbit?

2006-12-03 07:42:47 · 1 answers · asked by Kitana 2

if we have 200, five-hundred pound men, riding in a bus traveling at 178 miles per hour, what is the average speed of this bus if it has to stop for 5 minutes at a frankfurter stand.. these men are hungry.. they order 800 frankfurters.. after this frankfurter stop, the bus immediately speeds back to 178 miles per hour... what is the average speed of this bus over a 100 mile course????

2006-12-03 07:42:17 · 4 answers · asked by bigschwinger 2

2006-12-03 07:10:39 · 2 answers · asked by Kash D 1

2006-12-03 07:10:30 · 8 answers · asked by pesky_imp 1

Speed and Velocity both seem to be the same....if they're not to you...than can you please tell me what's the diffrence?

2006-12-03 07:06:09 · 13 answers · asked by Nicey L 1

The input voltage is a sine wave signal of frequency 100Hz and peak to peak voltage of 2V.
Draw 2 sketch graphs of the input voltage and against output voltage, against time. Include all values on the scales.

2006-12-03 06:51:46 · 1 answers · asked by Anonymous

A centrifuge accelerates uniformly from rest to 15,000rpm in 220s. through how many revolutions did it turn in this time.

This ? is about constant angular acceleration; rolling

thanx for your help.

2006-12-03 06:49:05 · 2 answers · asked by willy o 1

2006-12-03 06:46:34 · 8 answers · asked by Rachel T. 2

2006-12-03 06:40:51 · 5 answers · asked by Anonymous

This is a question from my physics text book. Underneath there is a picture of a guy trying to pull a weight by a chain. He is holding the chain horizontally and with both hands. im confused......thank you for your help!

2006-12-03 06:18:30 · 9 answers · asked by Anonymous

florence griffith set two world records in 1988. the first was set for the womens 100 m run, which she ran in 10.49 s with an average speed of 9.53 m/s. the second record was set in the womens 200 m run which griffith ran in 21.34 seconds with an average speed of 9.37 m/s. calculate the ratio of kinetic energies for each run

2006-12-03 06:05:24 · 3 answers · asked by socom_lover 2