Physics - February 2007

Specificaly from the boiling clouds on the earth surface rather than the altitude.

What would be the ratings in terms of killotons?

How would that same distance compare to a plutonium bomb?

2007-02-28 17:17:12 · 2 answers · asked by fordtblb 1

2007-02-28 17:06:10 · 2 answers · asked by newlito limuel d 1

just sitting here after cocktails thinking about things, and since you're not grounded. What would happen?

2007-02-28 17:04:46 · 9 answers · asked by wannabesparky 1

"Simple harmonic" motion is oscillatory motion of the form x=x(o)cos(2pi*t / T), where x(o) is the maximum amplitude of oscillation and T is the period of oscillation.

given:
a= –(2pi / T)^2 * x(o)cos(2pi*t / T).

QUESTION:
If x(o) = 0.1 m and T = 2 s, what are the maximum values of velocity and acceleration?

2007-02-28 17:01:59 · 2 answers · asked by Anonymous

When you touch a friend after walking across a rug on a dry day, you typically draw a spark of about 2 mm. The magnitude of the electric field for which dielectric breakdown occurs in air is about 3MV/m. Estimate the potential difference between you and your friend before the spark (answer in V).

2007-02-28 16:53:24 · 1 answers · asked by Anonymous

A proton is released from rest in a uniform electric field of magnitude 70000 V/m directed along the positive x axis. The proton undergoes a displacement from A to B of 0.2 m in the direction of the electric field. Ke = 8.98755e9 Nm^2/C^2 and the mass of a proton is 1.672623e-27 kg.

A) Find the change in the electric potential if the proton moves from the point A to B (answer in V).

B) Find the change in potential energy of the proton for this displacement (answer in J).

C) Apply the principal of energy conservation to find th speed of the proton after it has moved 0.2 m, starting from rest (answer in m/s).

2007-02-28 16:49:57 · 2 answers · asked by Anonymous

A frictionless track is to be built as shown, with L=3.70m and H=3.50m. In order to get the cart to slide from the top to the end of the track in the minimum time, how long should the distance D be? Assume that the speed of the cart on the horizontal surface is the same as at the bottom of the ramp.

here is the picture that goes along with this question
http://capa-new.colorado.edu/msuphysicslib/Graphics/Gtype11/prob05_ramp2.gif
thanks!!

2007-02-28 16:47:11 · 3 answers · asked by skiracer88_00 1

The Saturn rocket has so much fire power to make it move 41,000 km/h for it to escape earth’s gravity.the lem should fly at 8,000 km to do the same.but looking at the size of its rocket booster it could not have break free from the moon gravity

2007-02-28 15:29:49 · 2 answers · asked by PUBIC L 1

The milky way galaxy contains between 200 and 400 billion stars. Estimate the number of stars in a cluster of 30 galaxies similar in size to the milky way. Your answer should consist of a low esimate and a high esimate, both expressed in scientific notation.

2007-02-28 15:27:31 · 3 answers · asked by Anonymous

Suppose you have a large coffee can full of pennies. How can you estimate how much money the can contains without counting all the coins?(HINT: What is the relationship between the mass of pennies and the number of pennies?)

2007-02-28 15:24:25 · 4 answers · asked by Anonymous

a .005 kg bullet has a velocity of 500 meters per second when it hits a stationary 2.002 kg block of wood suspended by 2 ropes. the bullet imbeds itself in the block. (a) use the conservation of momentum to find v2, the velocity of the block and the bullet immediately after the impact. (b) what was the total kinetic energy immediately after the impact? (c) if all the kinetic energy was transferred to potential energy, mgh, how high did the block swing?

2007-02-28 15:14:10 · 1 answers · asked by mandy 1

2007-02-28 15:09:41 · 21 answers · asked by Destany J 2

a. lower than V
b. equal to V
c. higher than V
d. any of the above, depending on the ratio of turns in the
transformer coils

2007-02-28 15:05:03 · 5 answers · asked by Anonymous

a. equals its heat intake
b. equals the difference between its heat intake and heat
exhaust
c. depends only on its intake temperature
d. depends only on its exhaust temperature

2007-02-28 14:57:44 · 3 answers · asked by Anonymous

...you use the lightbulb at home in the United States, will it be dimmer or brighter than 25 W 120 V bulbs?
How much power will it consume?

Help? Thanks.

2007-02-28 14:57:32 · 3 answers · asked by abc123 1

a. volume
b. mass
c. weight
d. density

2007-02-28 14:53:41 · 3 answers · asked by Anonymous

you know the one that is you flush all the toilets in a neighborhood it will destroy the sewer system.

2007-02-28 14:51:04 · 2 answers · asked by Anonymous

Your friend's 12.6 g graduation tassel hangs on a string from his rear-view mirror. a) When he accelerates from a stoplight, the tassel deflects backward toward the rear of the car. Explain. b) If the tassel hangs at an angle of 6.20 degrees relative to the vertical, what is the acceleration of the car?

2007-02-28 14:46:39 · 2 answers · asked by 123haha 1

Okay here is what I'm facing. (I'm not a physics major or engineer major so I don't know swat about this).

There is a 3 volt source which is connected to two circuits: one is a series of two bulbs, and one is a parallel of two bulbs... which one is brighter? which one has greater power?

2007-02-28 14:36:55 · 2 answers · asked by Sir Guitarist 2

A spring-loaded gun can firre a projectile to a
height, h, if it is fired straight up.

If the same gun is pointed at an angle of
45 degrees from the vertical, what maximum height
h45degrees can now be reached by the projectile?

1. h45degrees = h
2. h45degrees = h/2*sqrt(2)
3. h45degrees = h /4
4. h45degrees = h / 2
5. h45degrees = h / sqrt(2)

2007-02-28 14:31:42 · 2 answers · asked by lennox lewis 1

2007-02-28 14:24:42 · 1 answers · asked by Buck BUCK 2

A capacitator with air between its plates is charged to 100V and then disconnected from the battery. When a piece of glass is placed between the plates, the voltage across the capacitator drops to 25V. What is the dielectric constant of the glass? (assume the glass completely fills the space between the plates.) I am given the equation: C=k(Esubzero)(Area/distance). Thank you for any help!

2007-02-28 14:09:28 · 2 answers · asked by Anonymous

Im trying to figure out how long it takes to get to the speed of light if energy isnt a problem, I read that if you had constant force you could travel around the milky way in a 100 years, becasue of the space dialation in the craft you are ridding in the people on earth would be long gone.

2007-02-28 14:00:24 · 3 answers · asked by chingow 2

From that height, how long would it take to fall, and how fast would the person be falling at the moment they hit the water?

2007-02-28 13:53:12 · 7 answers · asked by dragon8rider2 2

A mass M is at the top of a slide, it is sliding down the inclined part of a slide at a speed of 1.91 m/s. The mass stops a distance S2 = 2.5 m along the level part of the slide. The distance S1 = 1.22 m and the angle  = 35.70°. Calculate the coefficient of kinetic friction for the mass on the surface.

2007-02-28 13:50:47 · 1 answers · asked by Anonymous

2007-02-28 13:39:45 · 2 answers · asked by katie d 1

You swing a 4.5-kg bucket of water in a vertical circle of radius 1.1 m. a) What speed must the bucket have if it is to complete the circle without spilling any water? b) How does your answer depend on the mass of the bucket?

2007-02-28 13:33:58 · 3 answers · asked by 123haha 1

When I hit a ball with a bat, doesn't the baseball bat slow down and the ball speed up?

-My choices are: the bat slows down with the ball speeding up, the ball slowing down with the bat speeding up, both speeding up, both slowing down, or none of these. I thought that since the bat hits the ball, the ball slows down and so does the bat, but I'm not sure.

Oh, and does anyone know the answer to this problem:

Two people are tugging on a light rope. The rope doesn't slip in either one of their hands. Are the forces equal? Who will win?

- I think that the forces are equal but that the person who weighs more and has better footing will come out as the winner. Any thoughts?

2007-02-28 13:30:36 · 4 answers · asked by Nikita R 2

How many electrons make up a charge of -75.0 µC?

2007-02-28 13:21:55 · 1 answers · asked by gracelikerain 2

For my science fair i thought of making the kelvin water dropper, but my teacher said that would be a demonstaration and i need to come up with a question and something original. She said i can try using juice instead of water for the water dropper, but i dont want to do that.Whats something to test for my science fair relating to the kelvin water dropper that i can do, ????????? give a a question or something i can do, and its ok if its complicated. Thank You!!!!!!
NOTE THE NEW QUESTION OR IDEA HAS TO DO WITH THE KELVIN WATER DROPPER AND I CANNOT CHANGE THE IDEA!!!!!!

2007-02-28 13:19:03 · 2 answers · asked by Anonymous