Physics - November 2006

2006-11-26 16:20:20 · 1 answers · asked by Stephanie 1

Thank you!

2006-11-26 15:56:03 · 4 answers · asked by heyy ya 1

what are the errors involved in using the method below in determining the heat capacity or latent heat of substances and state what may be done to reduce these errors.
@= change in temperature
(Ms)(Cs)(@s)= (Mw)(Cw)(@w) + (Mc)(Cc)(@c)

2006-11-26 15:52:03 · 2 answers · asked by Stephanie 1

The ball's kinetic energy at A:
1.4J
The ball's speed at B:
4.31m/s

Determine the total work done on the ball as it moves from A to B.

2006-11-26 15:41:19 · 3 answers · asked by Fanjame 1

1) Is refraction of light a reversible process?

2) What happens to the wavelength of light as it passes from a more dense to a less dense medium?

3) If the angle of incidence from glass to air exceed the critical angle, what will happen?

4) How might the following professionals make use of Snell's Law?
a) Gemologist
b) food scientist
c) Environmental Protection Agency (EPA) Investigator

5) Every day life application for general concepts of refraction of light??

Much thanks! Just answer as many as you can :]

2006-11-26 15:24:23 · 3 answers · asked by heyy ya 1

1. The product of wavelength and frequency of light is a constant
2. As the energy increases, the frequency of the radiation decreases.
3. As the wavelength of light increases, the frequency increases.



Answer Choices:
a. 1 only
b. 2 only
c. 3 only
d. 1 and 3 only
e. 2 and 3 only

2006-11-26 15:14:44 · 4 answers · asked by Anonymous

Hw to make a rocket powered by water and compressed air?

2006-11-26 14:50:59 · 3 answers · asked by ghostrider.com 2

2006-11-26 14:37:14 · 5 answers · asked by migotran 1

2006-11-26 14:25:28 · 5 answers · asked by KJ 2

Since diamonds are indestructable, does that mean you could dip them in molten lava and nothing would happen to them?

2006-11-26 14:20:50 · 12 answers · asked by Anonymous

Hot water freezes faster then cold water.I have heard that hot water freeezes faster, is this true or false ,why or why not?

2006-11-26 13:32:06 · 5 answers · asked by johnnyBgood 4

Derive a formula for the maximum speed Vmax of a simple pendulum bob in terms of grams, the length L, and the angle of the Swing?

2006-11-26 13:30:30 · 2 answers · asked by Pat M 1

will the humming bird stay in the same place? or will the plane move around it?

(if you're having a hard time imagining it, imagine a humming bird hovering next to you're seat. the plane begins to move forward...does the humming bird stay next to you? or does it move backwards due to the fact that the plane is moving forward)

2006-11-26 13:27:56 · 14 answers · asked by Anonymous

2006-11-26 13:18:33 · 8 answers · asked by brytexgaelyn 2

A 0.3 kg block attached to a spring of force constant 10.8 N/m oscillates with an amplitude of 17 cm.

1) Find the maximum speed of the block in m/s

2) Find the speed of the block when it is 8.5 cm from the equilibrum position in units of m/s.

3) FInd its acceleartion at 8.5 cm from the equilibrium position in units of m/s^2.

4) Find the time it takes the block to move from x=0 to x=8.5 cm in units of s.

2006-11-26 13:06:59 · 2 answers · asked by Mariska 2

I understand that the nuclear strong force binds quarks together forming protons and neutrons, and also holds the protons and neutrons together against the electromagnetic forces exerted by the electrons on the protons; but, what does the nuclear weak force actually bind?

2006-11-26 12:53:18 · 3 answers · asked by Larry K 1

2006-11-26 12:48:31 · 8 answers · asked by now.focus 1

physics book weighing 20N slides at constant speed down a ramp inclined at 30 degrees to the horizontal. what is the force of friction acting on the book?

2006-11-26 12:36:06 · 4 answers · asked by Anonymous

-There are tree blocks in a cart
-The cart travels and hits a solid barrier
-The blocks fall

How does this show Newton's first law of motion?

2006-11-26 12:03:49 · 11 answers · asked by Anonymous

A constant F is applied to a mass m intially heading east with v intial until velocity is negative inital the time is 2t what the total distance?



First half of movement.... velocity goes from v to 0
Time = t, mass = m, v goes to 0
Impulse = Ft = m(v - 0) = mat (Momentum is Impluse)
a = v/t
One way distance = vt - 1/2(v/t)(t^2)
= vt - vt/2 = vt/2
Two way distance = 2(vt/2) = vt

2006-11-26 11:38:16 · 2 answers · asked by Anonymous

Can someone plz help he on any of these problems so that I can double check and complete some of my work ???


2. A halfback, with a mass of 95kg abd moving at 4.1m/s, on an apparent breakaway for a touchdown is tackled from behind by a cornerback whose mass is 85kg running at 5.5 m/s in the same direction. What was their mutual speed immediately after the touchdown-saving tackle?

3. A 9500kg boxcar traveling at 16 m/s strikes a second car. The two stck together and move at a speed of 6 m/s. What is the mass of the second car?

4. A 15g bullet strikes and becomes embedded in a 1.1 kg block of woob placed on a horizontal surface just in front of the gun. If the coefficient of kinetic friction between the block and the surface is 0.25 and the impact drives the block a distance of 9.5m before it comes to rest, what was the muzzle speed of the bullet?

2006-11-26 11:37:18 · 1 answers · asked by Sir Excalibur 2

2006-11-26 11:32:11 · 19 answers · asked by Rawrrr. 5

Strictly speaking, can you say that nothing has happened, that no evaporation or condesation has taken place? Explain please

2006-11-26 11:18:26 · 5 answers · asked by Melissa 2

it's part of my science homework, we need to print out pics of object that float or sink and we have to find the density of that object. my teacher wasnt specific enough , so how the hell am i going to find the mass and volume of a pup and diamond ring. (those were the objects i printed out)

2006-11-26 11:10:59 · 3 answers · asked by lilotata93 4

2006-11-26 10:49:18 · 7 answers · asked by Anonymous

Fusion has for decades been heralded as the solution to our global energy problems. Its clean, safe and has an enormously abundant fuel supply (so they say). And given the recent ITER annoucement and funding injection, fusion will be with us in........................ 30 years!!!!!!!!!!!

Given Sir Nicholas Stern's LSE presentation on not going green, why are we not throwing everything we have at this problem and cracking this thing in 10 years rather than 30?????

2006-11-26 10:28:40 · 5 answers · asked by Moebious 3

What will happen to te people on a thrill ride that has a hill or freefall that is as tall as the Empire State Building?

2006-11-26 10:28:36 · 5 answers · asked by bandmember18 1

If at the same time 220 J of work is done on the system, find the energy transformed to or from the system as heat?

I need help.. this question is bugging me.

2006-11-26 10:15:34 · 2 answers · asked by Adam 2

and doesn't have mass, and gravity is attraction between 2 bodies with mass, how can a black hole's gravity be so strong that light cant escape it?

2006-11-26 10:06:20 · 8 answers · asked by Mark H 2

f= frequency
f'= f(1 + (v cos theta/c))
f'= wavelength(wl')/c(speed of light)
f=wl/c
wl'= wl(1- (v cos theta/c))

how does the + change to - ?

2006-11-26 10:01:28 · 2 answers · asked by Anonymous