Physics - April 2007

A particle with a charge of 0.02 C is moving at right angles to a uniform magnetic field with a strength of 0.3 T. The velocity of the charge is 740 m/s. What is the magnitude of the magnetic force exerted on the particle?
_____ N

2007-04-07 07:15:29 · 1 answers · asked by bibun 2

True or False?

Please explain why...

2007-04-07 07:10:01 · 1 answers · asked by smeshie123 1

A recreational (open) hot air balloon (i.e., Pinside is approximately Poutside) has a volume of 2267 m3 when fully inflated. The total weight of the balloon, basket, ballast and pilot is 1989.4 N (448 lbs). By how much must the density of the air in the balloon be smaller than that of the surrounding atmosphere in order to keep the balloon floating level near the ground?

2007-04-07 07:00:48 · 3 answers · asked by Anonymous

2007-04-07 06:53:23 · 1 answers · asked by Anonymous

what has nature got against vacuums anyway, and isn't this blatant vacuumist discrimination? or is there really nothing in it?

2007-04-07 06:41:08 · 8 answers · asked by tina k 3

2007-04-07 06:32:35 · 4 answers · asked by Anonymous

2007-04-07 06:19:39 · 7 answers · asked by .·´¯`·-> вавіі-ѕнаz <-·´¯` 2

any fraction of infinity is also infinity or else it would be measurable. therefore if we can measure anything at all it disbands the theory that the universe is infinite

2007-04-07 06:01:51 · 7 answers · asked by yournamehere 2

According to the laws of Physics, would you say that hell absorves heat or gives up heat. What is your perception about this subject?

2007-04-07 05:10:53 · 71 answers · asked by Anonymous

B. The maximum compression of the spring when the mass runs in to it?

c. the mass rebounds as a result of having a compressed spring. what is i's velocity when it leaves contact with the spring?

Given:
A mass=0.70kg slides along the y-axis of a horizontal frinctionless surface with the speed Vx=2.2m/s. It runs in to a relaxed spring oriented along the x-axis. the spring had previously been observed to stretche by 3.8cm when it was oriented verticslly with the mass suspended from it.

2007-04-07 05:00:51 · 2 answers · asked by Lewiss L 1

for ex.For a body in non-uniform motion with x or y=(t+3) raised to the power 3 i.e y=(t+3)3 then how do we differentiate this function of a function.Like let t+3 be u.Therefore differentiate=dy/du*3(t+3)2(in power)*du/dt*1
=3(t+3)2(in power)+1 ans(probably)

2007-04-07 04:55:56 · 1 answers · asked by ani 1

there is:liquid,gas,plasma,solid,and what is the newly discoverd measurement?

2007-04-07 04:35:52 · 3 answers · asked by greengangsta 1

A mass m1 is connected by alight string that passes over a pulley of mass M to a mass m2 as shown in the figure. Both masses move vertically ans there is no slippage between the string and the pulley. The pulley has a radius of 30 cm and a moment of inertia of MR^2. If m1 is 4.0 kg, m2 is 3.0 kg, and M is 6.0 kg then what is the acceleration of the masses??

a) 0.695 m/s^2
b) 0.703
c) 0.731
d) 0.754
e) 0.805

please help, I keep getting answers that aren't a choice!!

2007-04-07 04:28:18 · 2 answers · asked by Anonymous

To the point where temperature becomes meaningless?

2007-04-07 04:11:47 · 5 answers · asked by Anonymous

what material is lining one side of the glass and how is it manufactured?

2007-04-07 03:06:56 · 4 answers · asked by anyhw 1

The bar magnet available in the India's market is always painted in red colour only not in any other colour. It is painted fully and only in red colour.Why?

2007-04-07 02:10:39 · 2 answers · asked by Awtar B 1

A body of mass 1kg is attached to a string 1m long and revolves in a horizontal circle of radius 40cm, thus making a conical pendulum. Find the tension in the string and the period of revolution of the penulum.

2007-04-07 00:13:38 · 5 answers · asked by Anonymous

well this means mass/area doesnt it? ive heard its some unit of pressure, can anyone please clarify??

thanks in advance.

2007-04-06 23:50:36 · 6 answers · asked by last 1

I can't find the answer on search!!!!

2007-04-06 20:33:09 · 5 answers · asked by YA!!! 3

1. Observations of the light from a certain star indicate that it is a part of a binary (two-star) system. The visible star has orbital speed v= 270 km/s, orbital period T = 1.70 days, and approximate mass m1 = 6*mass of sun (6*1.99*10^30 kg. Assuming that the visible star and its companion star, which is dark and unseen, are both in circular orbits, determine the approximate mass m2 of the dark star.

2007-04-06 20:21:06 · 2 answers · asked by Raj 2

I have a question, so, black holes "eat" everything on their path, even light, then what would hapen if two black holes colide or come into each other's gravitational field?

2007-04-06 20:02:26 · 7 answers · asked by Poseidon 2

A 1200-kg car rolling on a horizontal surface has speed v = 65 km/h when it strikes a horizontal coiled spring
and is brought to rest in a distance of 2.2 m.. What is the spring stiffness constant of the spring?

2007-04-06 18:57:49 · 2 answers · asked by      7

I'm starting to learn about atoms and I read that if an atom should split, the substance no longer exists. Does this mean it explodes? And if it does, does that mean that if you split an atom in the Earth that it would explode?

Sorry if these are really dumb questions...

2007-04-06 18:49:50 · 6 answers · asked by Anonymous

Fire is form of energy

2007-04-06 18:23:06 · 9 answers · asked by Faisal 1

Fire is form of energy

2007-04-06 18:17:03 · 4 answers · asked by Faisal 1

wouldnt this be the way to go? america spent billions if not trillions on developing the atomic bomb, why not fusion, this iter project in my opinion is not getting the attention it needs, so why are they taking so long to get things going

2007-04-06 17:47:38 · 8 answers · asked by john c 1

I have tried it but no luck, please help me. Thanks!

A block of mass 3.1 kg rests on a frictionless inclined plane, held in place by a string of mass 0.023 kg. The angle of the plane from the horizontal is 32°, and the string length is 1.5 m. How long does it take a wave to travel from one end of the string to the other? Note: Since the string is so much less massive than the block, the mass of the string can be neglected when calculating its tension.

2007-04-06 17:39:21 · 1 answers · asked by venom90011@sbcglobal.net 1

See when I open my freezer, theres ice in the freezer that forms. i always have to defrost it to clean it out. But Im wondering where does the ice come from. I would like to know if theres a scientific explanation for this. Thank you.

2007-04-06 17:38:11 · 7 answers · asked by ariel 2

a. no for both
b. depends on the intensity of the fields, which is not provided in this problem
c. yes; no
d. yes for both
e. none of these
f. no, yes

2007-04-06 17:18:41 · 8 answers · asked by me 2

Is it possible to feel G forces acting upon you in the absence of gravity, like in outer space.
I know planetary bodies have gravitational pull, but say you are nowhere, out in the black, what if you bank your space ship suddenly, do you feel the affect of that?

2007-04-06 17:12:51 · 8 answers · asked by Eric the Red 3