Physics - September 2007

How long will the fossil fuels: Coal, Oil and Natural Gas last?? Sources would be good too. Thankyou. xx

2007-09-11 06:39:19 · 3 answers · asked by Anonymous

The x component of vector is -20.0 m and the y component is +54.0 m. (a) What is the magnitude of ? (b) What is the angle (in radians) between the direction of and the positive direction of x?

2007-09-11 06:12:52 · 5 answers · asked by Tastytaint 1

A particle that has a mass of 2.28x10^-22kg and a charge of 3.29x10^-22C is traveling through space at 2.40x10^8m/s and encounters a magnetic field with an intensity of 2.41T. The particle is moving perpendicular to the field. If the particle's velocity remains constant, what will be the radius of curvature of its path?

just mainly need the equation to solve it, the book I'm using sucks but any help much appriciated :)

2007-09-11 05:48:14 · 3 answers · asked by jim 1

2007-09-11 05:42:42 · 2 answers · asked by Anonymous

if fluid drops from a barrel to the ground and when the barrel is empty there are roughly 2 square meters of fluid on the ground. How many liters (roughly) of fluid were inside the barrel?

2007-09-11 05:39:14 · 2 answers · asked by stan b 1

1.has an excess of electrons
2.has a deficiency of electrons
3.has an equal number of protons and neutrons
4.has an equal number of protons and electrons

2007-09-11 05:21:50 · 4 answers · asked by tia 3

force) how can we predict how the universe should have formed with a poor understanding of GUT, unified field theory or a string theory?

2007-09-11 05:18:48 · 2 answers · asked by Anonymous

If an airplane were to hover over Greenwich, and continued hovering in space, would it actually have had covered some distance, if it came down after five hours?
Theoretically, it should almost have the same result as an airplane that is covering distance by flying over earth.
how much would inertia affect the outcome?why would it not cover distance if it hovered long enough? would gravity actually pull the hovering plane along with it?

2007-09-11 05:11:24 · 2 answers · asked by Sooban 1

A field goal is attempted when the football is at the center of the field, 40 yd from the goalposts. if the kicker gives the ball a celocity of 40ft/s toward the goalpost at an angle of 45 degrees to the horizontal, with the kick be good? the crossbar if 10 ft above ground and must clear this height.

2007-09-11 04:52:30 · 1 answers · asked by port 1

In a gamma decay process, the internal energy of a nucleus of mass M decreases, a gamma photon of energy E and linear momentum E/c is emitted and the nucleus recoils. Find the decreases in internal energy.

2007-09-11 04:43:06 · 1 answers · asked by rock_bottom456 2

2007-09-11 04:32:09 · 6 answers · asked by Alexander 6

A volleyball is served from a heigh of 0.78m and gives it an initial velocity of +7.7 m/s straight up.
a.) How high will the volleyball go?(m)
b.) How long will it take the ball to reach its maximum height?(s)

2007-09-11 04:31:07 · 1 answers · asked by PePPeRaNNe 1

if they have drawn just a linear line and not drawn the curvaceous line then how to find the slope?

2007-09-11 04:26:07 · 1 answers · asked by drshitalpt 1

1. how long is it in flight
2. the speed of the stone just before it hits the ground.

2007-09-11 04:15:40 · 4 answers · asked by port 1

thanks in advance..

2007-09-11 03:43:36 · 3 answers · asked by yoorin728 1

Is thorough heat-sinking a good preventative measure? Can I do more?

2007-09-11 03:24:09 · 4 answers · asked by nowyermessingwithasonofabitch 4

A particle initially located at the origin has an acceleration of 2.00 m/s2 and an initial velocity of 0 = 8.00 m/s.
(a) Find the vector position at any time t (where t is measured in seconds).
( t i ) m
Find the vector velocity at any time t.
( + wrong check mark
The correct answer is not zero.t ) m/s

(b) Find the coordinates of the particle at t = 3.00 s.
x = m
y = m
Find the speed of the particle at this time.
m/s

2007-09-11 03:16:25 · 2 answers · asked by Dustin 1

A helicopter is ascending vertically with a speed of 5.20m/s. At a height of 125m above the earth, a package is dropped from a window. How much time does it take for the package to reach the ground? [ hint: the package's intial spped equals the helicopter's.]

2007-09-11 03:00:12 · 5 answers · asked by Anonymous

A ballplayer catches a ball 3.0s after throwing it vertically upward. With what speed did he throw it and what height did it reach?

2007-09-11 02:56:59 · 4 answers · asked by Anonymous

1. What's the use of knowing the center of gravity?
2. Is the center of gravity of a meterstick always located at the 50cm mark?
3. What do drivers mean when they say the car needs wheel balancing?
4. A traffic signal light is suspended by the cables. Under what condition will the tension be equal to the weight of the signal light?
5. Is it possible for the center of gravity to lie outside the body?
6. Does the center of gravity always coincide with the geometrical center of objects?

My answers: 1. for balance? 2. Yes (because it's a regular shaped object?) 3. wheel balancing - allows tires to spin without causing vibrations. 4. translational equilibrium (first) 5. Yes. 6. No (for irregularly shaped objects?)

Are my answers correct? Any more additional info to be added is appreciated. Thanks!

2007-09-11 02:56:52 · 3 answers · asked by nandemonai 2

2007-09-11 02:35:11 · 0 answers · asked by ashersage 2

i want to learn physics how can i do that plz answer di que>>

2007-09-11 02:05:14 · 6 answers · asked by Anonymous

2007-09-11 01:45:18 · 15 answers · asked by Anonymous

2007-09-11 00:28:00 · 5 answers · asked by Anonymous

What power will be required to move a locomotive weighing 1.00 x 10^6N up a grade that rises 1.5m for each 80.0m of track, so that it moves with a speed of 40.0km/h?
The frictional force opposing the motion is 2.00 x 10^3N

The answer is 2.31 x 10^5 but I am quite lost as to how they got it.

2007-09-10 20:37:23 · 2 answers · asked by guy 4

2007-09-10 19:32:59 · 7 answers · asked by daniel g 1

2007-09-10 19:27:34 · 3 answers · asked by eidnar 1

2007-09-10 18:17:39 · 18 answers · asked by Anonymous

2007-09-10 17:35:46 · 2 answers · asked by Anonymous

A basketball player, standing near the basket to grab a rebound, jumps 76.0 cm vertically. How much total time does the player spend (a) in the top 15.0 cm of this jump and (b) in the bottom 15.0 cm? Does this help explain why such players seem to hang in the air at the tops of their jumps? Show and explain your work. Thanks and good luck! :)

2007-09-10 17:19:19 · 1 answers · asked by Anonymous