Physics - April 2007

2007-04-05 09:15:02 · 6 answers · asked by Anonymous

I know it do you?

From Austin Age 12

2007-04-05 08:06:01 · 3 answers · asked by DA MULKA'S 2

Question:
The magnetic field perpendicular to a loop of wire 20cm in diameter is changed from
+0.52T to -0.45T in 180ms, where + means the field points away from an observer and – toward the observer

1. calculate the induced emf

2. in what direction does the induced current flow?

2007-04-05 07:57:02 · 3 answers · asked by a89411389 1

If we take a spring of mass M and compress it, it's energy
will increase by ΔE = 1/2 kx², and, accordingly, its mass
will inrease by ΔM = ΔE/c² = 1/2 k(x/c)². What this new
mass ΔM consist of?

2007-04-05 07:36:02 · 5 answers · asked by Alexander 6

a. increasing the temperature
b. increasing the surface area of reactants
c. decreasing the temperature

2007-04-05 07:20:20 · 1 answers · asked by Scigirl 3

it's for my school work so if you can answer my question I would gladly appretate it

2007-04-05 07:17:11 · 2 answers · asked by hiphop 1

2007-04-05 06:48:30 · 16 answers · asked by Justin M 1

2007-04-05 06:46:30 · 8 answers · asked by Justin M 1

2007-04-05 06:45:45 · 9 answers · asked by Justin M 1

2007-04-05 06:18:38 · 7 answers · asked by katie l 1

2007-04-05 05:44:49 · 2 answers · asked by bugletti 1

2007-04-05 05:18:54 · 17 answers · asked by Adrian Z 1

a. what atoms are "pressed" together?
b. what new element is created by this joining?
c. what is this joining by action of gravity called?

2007-04-05 05:12:13 · 4 answers · asked by Anonymous

a. what is that form of light called?
b. what is light called when wave length is too short for us to see?

2007-04-05 05:08:56 · 5 answers · asked by Anonymous

2007-04-05 05:02:00 · 2 answers · asked by thq 1

We all know that there is a theory whereby hot air rises and cold air sinks right,then why would we feel cooler at the top of the mountain instead of hotter (since theres a theory"hot air rises, cold air sinks"??

2007-04-05 04:54:16 · 8 answers · asked by thq 1

My dad and I have a $100 bet. He says that there would be a sound no matter what...I say that there won't be any sound because sound travels in compressional waves of air and since theres no air in space thers no sound...I just wanted some backup on this...

2007-04-05 03:53:43 · 16 answers · asked by Anonymous

............. or was it simply a phenomenon observed many times?

"As Isaac Asimov goes on to explain, "Newton's laws of motion represent assumptions and definitions and are not subject to proof. In particular, the notion of 'inertia' is as much an assumption as Aristotle's notion of 'natural place.'.."

(http://en.wikipedia.org/wiki/Inertia)

If it is just an assumption, then it could be wrong. What if it's wrong? That's something puzzling me. I mean, what if there's some matter in the Universe which does not obey the law?

Was the three Newton's laws established through empirical methods or a priori?

2007-04-05 03:52:38 · 3 answers · asked by English Learner 2

Whether Einsteins Field equations are solved? or verified?

2007-04-05 03:51:55 · 5 answers · asked by Smss 1

A 5 litre jug contains 4 litres of a salt water solution that is 15 percent salt. If 1.5 litres of the solution
spills out of the jug, and the jug is then filled to capacity with water,approximately what percent of the
resulting solution in the jug is salt?
(A)7.5% (B)9.5% (C) 10.5% (D)12% (E)15%

2007-04-05 03:30:07 · 2 answers · asked by life4u 2

2007-04-05 02:17:50 · 2 answers · asked by Anonymous

and if so would it cause a chain reaction and an explosion or just a meltdown?

2007-04-05 02:17:38 · 12 answers · asked by Anonymous

A beam of particles contains protons, alpha particles and muons with Ekin = 2 GeV. Calculate their respective energy loss dE/dx in a gas with Z/A = 0.5 and I = 60eV.

How can the ionisation loss of a particle be used to determine its electical charge z?

2007-04-05 02:12:58 · 2 answers · asked by Cameron L 1

When a ball or a ring is placed on a surface,it can slip,roll or slip with rolling....under what conditions are each of these executed??It probably has something to do with friction.

2007-04-04 22:50:44 · 6 answers · asked by Saniya 1

How does Diamonds high index of refraction cause it to sparkle? How does cutting of diamonds into facets increase the sparkle you see?

2007-04-04 20:17:15 · 7 answers · asked by El 1 1

2007-04-04 18:47:39 · 5 answers · asked by Rana 1

a bullet of mass m and speed v passes completely through a pendulum bob of mass M. The bullet emerges with a speed of v/2. The pendulum bob is suspended by a stiff rod of length and negligible mass. What is the minimum value of v such that the pendulum bob will barely swing through a complete vertical circle?

2007-04-04 18:29:10 · 6 answers · asked by wills 3

with a force of 1.0n to the right what is the net force acting on the block?

2007-04-04 17:58:51 · 1 answers · asked by stayin alive 2

I hear game announcers say that frequently, but it seems to me the maximum velocity would be the instant it leaves the bat and it would be downhill from there. The bounce on the ground would drain energy, if anything. Where is my thinking wrong here?

2007-04-04 17:13:19 · 10 answers · asked by Anonymous

2007-04-04 17:06:33 · 2 answers · asked by Henry2001 1