Physics - February 2007

parallel to the road. if the train's speed is 75 km/h , how long does it take the car to pass it. What is the result if the car and train are travelling in opposite directions?

2007-02-01 03:58:10 · 5 answers · asked by alanis118 1

How much current does it draw? What is the resistance of its fillament? How much energy is consumed in a year? What is the cost of its operation for a year at the utility rate of 15 cents/kWh?

2007-02-01 03:56:13 · 3 answers · asked by whoknows 1

2007-02-01 03:50:52 · 8 answers · asked by Anonymous

The vertical height of the stairs is 10.0 m. How much work is done?

2007-02-01 03:47:52 · 2 answers · asked by Anonymous

The bullet leaves the 5500 g rifle with a velocity of 150 m/s. How much does the rifle move when it is fired?

2007-02-01 03:41:23 · 5 answers · asked by Anonymous

2007-02-01 03:37:15 · 5 answers · asked by AJ 1

Neglect the rare gases and the carbon dioxide contained in air

2007-02-01 03:22:53 · 1 answers · asked by zizi m 1

Suppose a uniform electric field of magnitude 115.0 N/C exists in a region of space. How far apart are a pair of equipotential surfaces whose potentials differ by 2.0 V?

I know 115.0 N/C is the same as 115.0 V/m and it seems i should just divide it by 2.0 V 2 / 115 = .017 m but this isn't correct

Any suggestions??

2007-02-01 03:17:40 · 1 answers · asked by natedog3280 2

Please....... it's urgent.......!!

2007-02-01 03:13:05 · 8 answers · asked by Anonymous

So im learning about light frequencies in chem and I was just wondering what the diff was??
and what color of light has the highest energy and frequency??
Thanks! :)

2007-02-01 03:00:10 · 3 answers · asked by Tracey Lee ♥ 2

in a parallel circuit.

2007-02-01 02:54:35 · 6 answers · asked by whoknows 1

bulb when it is connected to a 110-v source?

2007-02-01 02:47:14 · 2 answers · asked by whoknows 1

Yes or no? Are the elements grouped the way the are for a reason? Does the date an element was discovered effect where the element is placed on the table?

2007-02-01 02:43:14 · 7 answers · asked by Jenna - Adopt Me Angelina 3

What happens to the remaning energy?

2007-02-01 02:35:28 · 5 answers · asked by whoknows 1

I dont want an answer like, it just can ok

2007-02-01 02:26:49 · 3 answers · asked by charlie b 1

in spacetime diagrams the worldline for light is the 45degree line.
And all event possible must lie within this line....

if you were asked to explain what this line means how would you?

2007-02-01 01:32:02 · 2 answers · asked by sh 1

,.pls,.hurry

2007-02-01 01:21:33 · 3 answers · asked by NuRz 1

I need to figure out what is the Final Velocity (Vf) of a rockect when the motor stops at 16 secs (T1). I know the Accelrations was 27.0. So here are my values. V0 = 0 T0 = 0 Y0 = 0 T1 = 16 Secs A = 27.0

I am right by useing the Accelrations formula to get the Final Velocity?

A = Vf - Vi / Tf - Ti I get 27.0 = Vf/16 27 * 16 = 432 Velocity. Is this correct?

2007-02-01 01:19:56 · 3 answers · asked by antihero1776 1

Is there a physics equation which is dimensionally incorrect but otherwise is true?

2007-02-01 01:17:15 · 9 answers · asked by Ask Me! 2

Why do electrical charges in any object gather at points?
(The highschool textbooks say it does, but they don't say why...)

2007-02-01 01:14:25 · 2 answers · asked by Anonymous

You are given a bottle with American coins: pennies, nickels, dimes, and possibly quarters. You are NOT allowed to open the bottle. And you do not know HOW MANY coins are in the bottle. How can you find the exact amount of money that the bottle holds?

--You can weigh the bottle and any spare coins you have laying around to find the weight of an individual coin. You can count coins on the outside. Anything else within the "rules" is acceptable.

2007-02-01 01:12:24 · 10 answers · asked by Anonymous

A rocket has a mass of 100 kg. The force produced by the engine of the rocket is 3000 N in the direction against the force of gravity. What is the acceleration of the rocket?

A. 10 m/s²
B. 20 m/s²
C. 30 m/s²
D. 40 m/s²

2007-02-01 00:59:04 · 7 answers · asked by Jason 1

An object weighs 12 N on earth. When it is brought to Mars, it has a weight of 4.8 N. What is the acceleration due to gravity on Mars? (Taking the acceleration due to gravity on earth is 10 m/s²)

A. 4.0 m/s²
B. 4.8 m/s²
C. 10 m/s²
D. 12 m/s²

2007-02-01 00:57:53 · 8 answers · asked by Jason 1

2007-02-01 00:35:59 · 7 answers · asked by bala b 1

Question: a plate carries a charge of -3.0 uC, while a rod carries a charge of +2.0 uC. How many electrons must be transferred from the plate to the rod, so that both objects have the same charge?

My Approach:

N= q/e = -2.0e-6/-1.6e-19 = 1.25e13 electrons transferred

something doesn't seem right about this problem. the prof didnt mark this wrong, but he marked -2.0e-6 C wrong? anyone with the fix?

2007-02-01 00:33:10 · 2 answers · asked by Anonymous

A torch on the end of a piece of string, in the centre of a cylinder, is spinning round at the speed of light. At what speed is the light from the torch hitting the inside wall of the cylinder, if light can not go faster than186,000mp/second. Surely, it would be travelling faster than this, if the point at which the torch was spinning was already travelling at the speed of light?

2007-02-01 00:27:37 · 7 answers · asked by Anonymous

An object moves uniformly around a circular path of radius 21.5 cm, making one complete revolution every 2.20 s.
(a) What is the translational speed of the object
(b) What is the frequency of motion in hertz?
(c) What is the angular speed of the object?

2007-02-01 00:25:01 · 3 answers · asked by Kelly C 1

The motion of an object is described by the equation below.
x = (0.20 m) cos(t/6)

(a) Find the position of the object at t = 0 and at t = 0.40 s. t = 0 m
t = 0.40 s 0.99
Your answer differs from the correct answer by 10% to 100%. m
(b) Find the amplitude of the motion.
m
(c) Find the frequency of the motion.
Hz
(d) Find the period of the motion.
s

2007-02-01 00:22:56 · 2 answers · asked by Kelly C 1

i think that two particles that are the same cannot be in the same time period or somethings going to happen.

2007-02-01 00:07:59 · 15 answers · asked by ♥lois c♥ ☺♥♥♥☺ 6

2007-02-01 00:03:49 · 6 answers · asked by Gen. Zyril Cydryk 1