Physics - August 2007

Negative clipping of an output signal occurs when the
A. output impedance is too high.
B. input impedance is too high.
C. input amplitude is too high.
D. power supply voltage is too high.

2007-08-31 06:55:11 · 1 answers · asked by Anonymous

Assuming that the human body can survive a maximum continuous acceleration of 6.36 m/s2, calculate the minimum time in which a space ship can accelerate from 0 m/s to 3.0 ×107 m/s, that is, to a velocity that is 10% the velocity of light.

I have no idea how to even start this problem. I know im required to use one of the four basic formulas but i am unsure of which and how to go about doing it.. Thanks

2007-08-31 06:54:00 · 11 answers · asked by Anonymous

Mass=4kg(M), which is immobile and is standing on the equillibrium point,is attached on a spring and it is h=2 m away from the floor.We shoot from the floor another mass m=4 kg to the mass M with a velocity U= 7 m/s.The two masses collide (headon collision) elastically.After the collision the mass m returns to the floor the moment the mass M passes from the equilibrium point for the first time after the collision.

Find:
1.the momentum of the mass M hardly after the collision.
2.the spring constant k
3.the maximum height from the floor of the mass M during the oscillation

2007-08-31 06:49:28 · 1 answers · asked by Joey 1

Can somebody show me how to set up this problem?

A uniform electric field of magnitude 270 V/m is directed in the positive x direction. A +14^(-6) C charge moves from the origin to the point (x,y) = (20.0 cm, 50.0 cm)

A) What is the change in the potential energy of the charge field system?

B) Through what potential difference does the charge move?

I've solved part B (-54 volts), but I'm stumped as to how to tie it in with part A. Can somebody help?

2007-08-31 06:36:09 · 2 answers · asked by Anonymous

2007-08-31 06:35:52 · 2 answers · asked by Alexander 6

Like whether a Kleenex box could be deadly in an accident. If you know how much force it takes to crack a human skull, couldn't you just weigh the box and calculate the velocity necessary to create that force, and then from other accident reports figure the maximum speed able to be transferred to that box? Instead they're making ballistic dummies and crashing cars all over the place.

2007-08-31 06:04:04 · 9 answers · asked by Anonymous

i want to make an advertisement to sell it. But i don't know what it could be used for. I want to make an advertisement o fit using it's physical properties like its very elastic and stretchable. It flattens after 30 sec. if u put it on a flat surface rolled up as a ball. etc.

So what could use the "Glurch Slime for" ?????

2007-08-31 05:41:49 · 2 answers · asked by Anonymous

Mass=4kg(M), which is immobile and is standing on the equillibrium point,is attached on a spring and it is h=2 m away from the floor.We shoot from the floor another mass m=4 kg to the mass M with a velocity U= 7 m/s.The two masses collide (headon collision) elastically.After the collision the mass m returns to the floor the moment the mass M passes from the equilibrium point for the first time after the collision.

Find:
1.the momentum of the mass M hardly after the collision.
2.the spring constant k
3.the maximum height from the floor of the mass M during the oscillation

2007-08-31 05:18:30 · 1 answers · asked by Joey 1

2007-08-31 05:04:19 · 19 answers · asked by puppy 1

A thermometer gives a reading of 97.1°F (plus or minus) 0.3°F. How would I figure out the uncertainty?
Thank you so much in advance to anyone who can explain this to me.

2007-08-31 03:59:31 · 1 answers · asked by k102518 2

Like Convert Kw INto Cash So I Will Know How Much It Is Every Month

2007-08-31 03:58:12 · 2 answers · asked by Anonymous

will it freeze before it hits the ground?

2007-08-31 03:46:53 · 4 answers · asked by ignernt 3

2007-08-31 03:19:31 · 6 answers · asked by Hannah C 1

what does this law mean?
the rate at which a body cools is proportional to the temperature difference between the object and its surroundings.

2007-08-31 03:13:24 · 6 answers · asked by amir 2

2007-08-31 02:23:31 · 3 answers · asked by Gruntled Employee 6

2007-08-31 02:15:08 · 10 answers · asked by monicakryzelle_fortes 4

Imagine a long bar, floating in space away from other sources of mass. Gravity will cause the bar to try to compress due to its own mass. So what force would I measure if I cut the bar in the middle and put a force meter there? Assume the bar has length L, cross-sectional area A, and mass M (and any other constants you think you need).

To a first order approxiamtion, this is easy. Split the bar in half and treat as 2 masses separated by L/2 (so the force is GMM/((L/2)^2).

But if this is true, you should get the same answer if you split the bar in 4 parts - but actually then the force is bigger. In fact, the more bits you split the bar into, the bigger force you get.

Same problem if I try integration - I always end up with one limit being 1/0 (ie infinite) at the middle of the bar.

If anyone can resolve this for me I'd be really grateful, I've asked a bunch of clever people and no-one's solved it yet!

2007-08-31 02:10:20 · 6 answers · asked by samthesuperfurryanimal 3

2007-08-31 01:42:23 · 7 answers · asked by lola 2

2007-08-31 01:37:19 · 2 answers · asked by Anonymous

Is there anything that can travel faster than the speed of light?

2007-08-31 01:30:26 · 16 answers · asked by Anonymous

2007-08-31 00:59:57 · 6 answers · asked by Anonymous

Q.1 A steel tape is calibrated at 300 Kelvin. On a cold day temperature is -25 degree centigrade what will be the percent error change?
(Alpha of steel = 11*10^-6 per degree kelvin)

2007-08-31 00:50:17 · 2 answers · asked by Yahya B 1

Physics Principle : Energy can neither be created nor destroyed.

Reference in Hinduism : Atma (inner soul, the energy) will not be destroyed, it moves from body to another.

2007-08-31 00:44:41 · 7 answers · asked by kirankumar a 1

hi all...it is said that constructive interference happens when the path difference is nlambda and i think wavelength,frequency and amplitude of light going through both slits is the same then
why is the central maxima is the brightest spot?
why the brightness decreases when n increases?

Since the amplitude is same why there is difference in the brightness of the bright fringes?

2007-08-31 00:06:27 · 3 answers · asked by Anonymous

How do I measure the initial velocity of an object when it is launched and air resistance is taken into account???

2007-08-30 23:34:13 · 11 answers · asked by max88 2

2007-08-30 21:58:14 · 17 answers · asked by Maya 1

once it was established that mass is a concentrated source of energy.it is a logical view that such energy would reduce as an inverse square law in and through the ambient space.tesla seems to have such a view see r.lomas 1999-230-1.

2007-08-30 19:55:03 · 6 answers · asked by william p 1

2007-08-30 18:43:29 · 11 answers · asked by Anonymous

2007-08-30 18:03:57 · 4 answers · asked by Anonymous

Find the counterclockwise angle the vector difference Vector B- Vector A makes with the +x axis
VectorB-VectorA=6.83cm
Problem 1.45
Vector A has components Ax = 1.29 , Ay = 2.43 ; vector B has components Bx = 4.17 , By = -3.76 .

2007-08-30 17:13:33 · 2 answers · asked by osu9295 1