Physics - January 2007

If the plane is elevated at angle 0, what are the opposing forces?

2007-01-24 03:32:04 · 5 answers · asked by RhondaJo 2

2007-01-24 03:26:27 · 6 answers · asked by alexis christian 2

Ok, this question is driving me mad :S

The conditions of the movement are:
-under gravity (9,81m/s2)
-under friction and drag (air)
-just free fall (vertilcally down)

other data:
-the bullet mass is 115gr
-the aerodinamic coefficient is 0,143

What I want to know is, when in free fall, what's the limit speed of the projectile? or how do I calculate it? (in an easy way if possible hehe)

Please help T.T

2007-01-24 03:09:42 · 2 answers · asked by Bushido 1

I was looking at a swing in the playground and watch how it swings back with the same momentum as it was being push by a child. Imagining the eath, it's round and you are standing at the north pole. Ignoring the hot inner core that could melt you down once you pass by it, just to give way to what I want to know, I am thinking that you gain acceleration at first as you travel to the center of the earth and once you traversed that center you will now start to slow down and reach the south pole in a momentum of just about to jump in. How long will I travel to reach the opposite side of the earth considering my momentum and acceleration? -Mykk

2007-01-24 02:57:11 · 9 answers · asked by Anonymous

A typical automobile under hard braking loses speed at a rate of about 7 m/s^2, the typical reaction time to engage the brakes is .50 s. A scheool board sets the speed limit in a school zone to meet the condition that all cars should be able to stop in a distance of 4m. What maximum speed should be allowed for a typical automobile? What fraction of the 4m is due to reaction time?

2007-01-24 02:42:25 · 2 answers · asked by oscarthecan 3

A jet airplane travelling at the speed of 500km/hr ejects its products of combustion at the speed of 1500km/hr relative to the jet plane. What is the speed of the latter with respect to an observer on the ground?

2007-01-24 02:40:07 · 5 answers · asked by Anonymous

has there ever been any studies on this ???

2007-01-24 02:39:02 · 7 answers · asked by dragongml 3

2007-01-24 02:31:58 · 3 answers · asked by Anonymous

My friend came up with an interesting idea/thought. If we can photograph light, then if we modify the lens and what not, is it possible to take pictures of micro/radio waves?

2007-01-24 02:22:48 · 4 answers · asked by Anonymous 3

OPTICS FOR DEGRREE GRADUATES

2007-01-24 02:22:13 · 3 answers · asked by robin j 1

assuming all of the force generated by the engine goes into acceleration of the car how much force is the engine producing?

2007-01-24 02:07:28 · 5 answers · asked by Anonymous

2007-01-24 02:01:51 · 4 answers · asked by pravin 1

Its bcoz of the static charge in our body. But why only in winter? What does dry skin has to do with it?
We get electric shock in a very small magnitude, but its more bothering than being fearful.
What is the remedy for this?

2007-01-24 01:30:30 · 4 answers · asked by Anonymous

2007-01-24 01:28:13 · 4 answers · asked by sassy chick 1

2007-01-24 01:20:39 · 4 answers · asked by norwood 1

I have a question concerning echos.

2007-01-24 01:00:53 · 10 answers · asked by Anonymous

I have heard this is the news and still have not understood why?
Can anyone help?

2007-01-24 00:44:24 · 5 answers · asked by Sweetos 1

I want a deep answer...

2007-01-24 00:14:47 · 3 answers · asked by Sathya 1

I need the explanation and proof of it. Thanks for your answer.

2007-01-24 00:02:06 · 9 answers · asked by Anonymous

except fpr s-cool and fear of phisics

2007-01-23 23:38:05 · 2 answers · asked by Anonymous

2007-01-23 22:46:10 · 4 answers · asked by de bizzle 2

A polar bear partially supports herself by pulling part of her body out of the water onto a rectangular slab of ice. The ice (with specific gravity of 0.917) sinks down so that only half of what was once exposed now is exposed, and the bear has 70% of her volume and weight out of the water. Estimate the bear's mass, assuming that the total volume of ice is 10 m^3, and the bear's specific gravity is 1.0.
Answer is 7.9 x 10^2 kg
Can someone please show the solution for this problem...

2007-01-23 22:23:14 · 1 answers · asked by Elicasel 3

Energy can't be created and destroyed and for any action there'll be reaction. Since these are true, how come the universe can continue to be in motion with energy in an endless cyclical process (continuous conversion from one form to another)? I mean, can't the universe just balance itself out and be static (cease to have motion)? What causes the universe to continue to be in motion?

2007-01-23 22:20:26 · 2 answers · asked by Anonymous

Or are they just theoretical?

2007-01-23 22:06:05 · 1 answers · asked by Anonymous

A car moves along an x axis through a distance of 900 m, starting at rest (at x = 0) and ending at rest (at x = 900 m). Through the first of that distance, its acceleration is +2.25 m/s2. Through the next of that distance, its acceleration is –0.750 m/s2. What are (a) its travel time through the 900 m and (b) its maximum speed?

2007-01-23 21:52:33 · 5 answers · asked by mathlover 2

For example, if a positive charge and a negative charge all of the sudden come into existence at the exact same time, would there be a delay before the force between them occurs? This would happen if the electric field travelled out of the positive charge at a finite speed because it would take a certain amount of time for the negative charge to recieve it and be influenced by it.

2007-01-23 21:48:25 · 7 answers · asked by Anonymous

2007-01-23 21:47:57 · 12 answers · asked by rache G 1

2007-01-23 21:45:36 · 8 answers · asked by Anonymous

the copper wire bent thing. I would like it to buzz? Do I use a door bell

2007-01-23 21:36:55 · 1 answers · asked by Cay K 1

2007-01-23 21:07:32 · 8 answers · asked by Queenie 4