Physics - March 2007

2007-03-08 22:19:53 · 13 answers · asked by ashwin_44 1

2007-03-08 22:15:28 · 2 answers · asked by vishnu v 1

For example imagine the situation when the induction waves reaching the food being cooked, howver I am well aware that induction waves dont harm the non-ferromagnetic content, however some green leefy vegetables have got iron mineral (an essential food supplement) which is unfortunately ferro-magnetic. So my concern wont this induction cooking burn the minute iron mineral in the food being cooked.

2007-03-08 22:04:28 · 4 answers · asked by Anonymous

an air bubble is 2 cm'3 at the bottom of 40 m deep water where the temperature is 4°C. What is the volume of the the airbubble at the water surface where the temperature of the water and air bubble are 20°C?

thanks for any help:)

2007-03-08 21:51:17 · 1 answers · asked by appelstina 1

He received it for the discovery of Rontgen rays.His last name is there in the name of the rays.

2007-03-08 21:13:24 · 8 answers · asked by Bharath P 1

A bat locates a moth and emits an ultrasound pulse that takes 1s to return to the bat.
(a) Estimate the distance from the bat to the moth.
(b) Estimate the lower frequency of the pulse emitted by the bat.

2007-03-08 21:06:07 · 1 answers · asked by Anonymous

A) energy is infinite
B) forces that balance each other are in equilibrium
C)force can be expressed as the accleration it gives to an object
D) energy is limited and discontinuous

2007-03-08 20:26:21 · 5 answers · asked by aliah_natasya2003 1

An electron with initial velocity v0 = 1.96 × 105 m/s enters a region 1.0 cm long where it is electrically accelerated. It emerges with velocity v = 5.45 × 105 m/s. What is its acceleration, assumed constant? (to 4 signficant fig)

2007-03-08 19:33:07 · 2 answers · asked by Wilson J 4

2007-03-08 18:43:36 · 3 answers · asked by dpileofashes 2

2007-03-08 18:31:05 · 8 answers · asked by Casey w 1

2007-03-08 18:01:32 · 5 answers · asked by Anonymous

In the railroad freight yard, an empty freight car of mass m rolls along a straight level track at 1.1 m/s and collides with an initially stationary, fully loaded boxcar of mass 3.9m. The two cars couple together upon collision.

(a) What is the magnitude of the velocity of the two cars after the collision?

(b) Suppose instead that the two cars are at rest after the collision. With what speed was the loaded boxcar moving before the collision if the empty one was moving at 1.1 m/s?

2007-03-08 17:47:12 · 1 answers · asked by Anonymous

Do you believe the string theory might one day be more than a theory?
Do you believe we are just living on a "membrane" surrounded by many other dimensions?
What would it be like to know that there may be *other* universes with *intelligent* beings??
What if we could find a way to contact them?
The implications of all of this are so exciting i can barely stand it!

2007-03-08 17:38:18 · 6 answers · asked by B 3

I am confused at how forces work. If I am stationary on hard ground there is force of gravity and the normal force.
If I am squatting down and then I stand up I am accelerating as I start to stand up. I don't think Fgravity can change so how does the Fnormal change because of the acceleration? or is it the Fnormal that does not equal Fgravity anymore that is causing the acceleration?

As you can see I am quite confused. All I know is that since there is movement there is now an acceleration butI dont really know how the forces work to cause the acceleration.
thx!

2007-03-08 17:23:55 · 4 answers · asked by n33dh3lp 1

2007-03-08 17:01:06 · 3 answers · asked by scifuntubes 3

2007-03-08 16:50:06 · 6 answers · asked by Rimi M 1

2007-03-08 16:36:54 · 6 answers · asked by nidhi2890 2

a person pushes on a stationary 125N box with 75N at 30 degrees below the horizontal. the coefficient of static friction between the box and the horizontal floor is 0.80. What is the normal force on the box? What is the friction force on the box? what is the largest the friction force could be? the person now replaces his push with a 75N pull at 30 degrees above the horizontal.Find the normal force on the box in this case.

2007-03-08 16:22:33 · 1 answers · asked by pookie 1

If you were floating with your head in the exact center of a perfect sphere twenty feet in diameter, with a perfectly reflective inner coating, and you had a flashlight.

2007-03-08 16:08:42 · 2 answers · asked by juicy_wishun 6

2007-03-08 16:03:59 · 2 answers · asked by Thejames A 1

Einstein himself said that the past, present, and future are but illusions. (Not time, as I've heard many people confuse this and think time does not exist.)
If space and time are relative but space-time absolute. Then in a sense, what happened in the past is still "happening" and what happens in the future "has already happened". How then does this allow for free-will? Or does it not allow for it?
And does quantum theory affect your views at all?

2007-03-08 15:58:13 · 6 answers · asked by Anonymous

A 0.007-kg bullet traveling horizontally at 400.4 m/s strikes a 4.1-kg block of wood sitting at the edge of a table. The bullet is lodged into the wood. If the table height is 1.2 m, how far from the table does the block hit the floor?

I thought i had to use v=sqrt (2gh)... but clearly i that is not the right equation to use. any help would be great! thanks!

2007-03-08 15:53:46 · 2 answers · asked by Anonymous

There is a thing here in the U.S that takes particles and spins them around in opposing directions at nearly the speed of light and colliding them to produce gravitons, and they are working on an even bigger one in france, but i cant remember what its called...PLEASE HELP this is buggin the CRAP out of me...

2007-03-08 15:19:16 · 4 answers · asked by B 3

2007-03-08 15:08:55 · 18 answers · asked by Justin H 1

is it ever possible for a heavier student moving up stairs slower that a lighter student to produce a greater power output?

2007-03-08 14:56:22 · 2 answers · asked by tico 1

2007-03-08 14:41:49 · 16 answers · asked by Sachin K 1

2007-03-08 14:40:06 · 1 answers · asked by jimmy 1

The hypothesis is "Only the length of the pendulum has any significant effect on the period of the pendulum. the amount of mass hung from the end of the pendulum and the distance pulled back has little effect on the period, when compared to the length.
Eqipment: a support stand, support bar from which masses will be hung, 6 14-gram rubber masses with metal hooks that will be hung from a loop tied to one end of the string, a piece of string (1.5-2m), stop watch, protractor to measure the angle, and a meter stick

2007-03-08 14:39:32 · 2 answers · asked by imanperkins 2

this is a physics problem that i cant figure out, i dont necessarily need the answer, just the formula i can use to solve it.

2007-03-08 14:36:34 · 3 answers · asked by Anonymous

Alright so I was brushing my teeth in the bathroom. I was starring at some shaving cream on the counter. The shaving cream was slighlty wet. So all of sudden the shaving cream moves all by itself! What could have caused this to happen? (it only slightly moved though, like half an inch)

2007-03-08 14:35:08 · 16 answers · asked by Anonymous