Physics - November 2007

2007-11-04 21:54:47 · 5 answers · asked by Anonymous

Given mass of an object as M, what is the velocity needed for that object to beat earth's gravitational pull. I am looking for the formula

2007-11-04 20:09:18 · 9 answers · asked by amythsm 1

2007-11-04 18:56:10 · 19 answers · asked by Anonymous

A thin, 80.0g disk with a diameter of 7.00cm rotates about an axis through its center with 0.260J of kinetic energy.What is the speed of a point on the rim?

2007-11-04 18:21:12 · 7 answers · asked by smart-crazy 4

Temples in Hindu Religion

2007-11-04 17:26:05 · 10 answers · asked by aashish2007 1

1. What relationship exist between the number of coils and magnetic field strength?
2. When you decrease the number of coils and magnetic field,what happen to the strength of wire?
3. When you increase the number of coils and magnetic field,what happen to the strength of wire?

2007-11-04 17:19:07 · 2 answers · asked by aning a 1

As sound has energy in it. It has vibrations. If we keep some paper pieces in front of speakers they vibrate and move. So can we extract energy from sound like we generate power from solar power and from wind power.

2007-11-04 17:14:55 · 5 answers · asked by Sooraj Kumar 2

I think it is a constant, why should I think it is not a constant? UM, I forget.

2007-11-04 15:41:03 · 2 answers · asked by Anonymous

2007-11-04 14:54:54 · 2 answers · asked by Anonymous

I mean, it must be true, judging by what a belly flop off of a high dive feels like.

2007-11-04 14:50:46 · 18 answers · asked by Anonymous

A grindstone in the shape of a solid disk with diameter 0.52 m and a mass of m=50kg is rotating at omega=820 rev/min. You press an ax against the rim with a normal force of F = 230 N, and the grindstone comes to rest in 7.30 s.
http://session.masteringphysics.com/problemAsset/1040261/1/yf_Figure_10_44.jpg

2007-11-04 14:12:47 · 1 answers · asked by zoro-kun 2

just as physicists have determined the half lives of all the elements, can we assume there's is such a thing as a millionth life for each element as well? and would that mean that 500,000 millionth lives is equal to that of one half life? certainly, it would be much easier to measure a millionth life for an element whose half life is on the order of millions of years.

2007-11-04 13:34:51 · 4 answers · asked by just curious (A.A.A.A.) 5

at what height will the stream strike the building....how i do look for height?

2007-11-04 13:13:12 · 2 answers · asked by Wayne S 1

What will be its new resistance when it is shortened by (a) cutting it in half or (b) doubling it over and using it as "one" wire?

2007-11-04 13:11:54 · 3 answers · asked by nancy c 1

Similarly, what two things can be done to increase the current in an electrical circuit?

2007-11-04 13:09:39 · 3 answers · asked by nancy c 1

2007-11-04 12:36:41 · 3 answers · asked by Anonymous

Well i thought it stays the same - but by changing the voltage in my experiment it means that the energy put in changes, causing the heat capcity to change - is htis wrong?

2007-11-04 12:02:02 · 2 answers · asked by Anonymous

2007-11-04 11:52:42 · 1 answers · asked by idolvictoria 2

Suppose you are designing a car for a coasting race-- the cars in these races have no engines; they simply coast downhill. do you want large wheels or small wheels? Do you want solid, disk-like wheels or hoop-like wheels? Should the wheels be heavy or light?

2007-11-04 11:46:31 · 1 answers · asked by Gator fan 1

A bicyclist is coasting straight down a hill at a constant speed. The mass of the rider and bicycle is 80.0 kg, and the hill is inclined at 13.0° with respect to the horizontal. Air resistance opposes the motion of the cyclist. Later, the bicyclist climbs the same hill at the same constant speed. How much force (directed parallel to the hill) must be applied to the bicycle in order for the bicyclist to climb the hill?

2007-11-04 11:38:01 · 1 answers · asked by Bill B 2

How much force must be applied to push a 1.35 kg book across the desk at constant speed if the coefficient of sliding friction is 0.30?

Please...someone help me. I am lost as to how to solve this. I would greatly appreciate it if someone could help me out. Thank you much. I promise to give 10 to the best answer.

2007-11-04 11:37:17 · 1 answers · asked by ☺♠JonasJay♫♦ 5

2007-11-04 11:35:59 · 1 answers · asked by Doc 2

Hey, im 13 and in 8th grade and for tech we are two design a wooden car that is no longer than ten inches and no wider than 6 inches including tires.

The object is too go fast down a ramp side by side next to another car, go airborne and land. The first car to land wins.

What would make it win, and go fast and land abruptly. Thanks!!

2007-11-04 11:32:37 · 3 answers · asked by liveyourlife♥ 3

Hi, I was just needing some help with my physics homework because my teacher tends to get off subjetc and doesn't teach us how to do it, Anywho...

☺How do you find the coefficient of sliding friction if the horizontal force, mass, and acceleration is given?

☺How do you find the acceleration of an object given the applied horizontal force, mass, and coefficient of friction?

Thank you very much!

2007-11-04 11:30:43 · 4 answers · asked by Anonymous

2007-11-04 11:20:57 · 1 answers · asked by myfrigginjunklist 2

State the method of heat transfer by

a)that does not require particles
b)that works because particles collide with their neighbors
c)in which thermal energy travels at the speed of light
d)that works when particles circle in a path


Thanks in advance.

2007-11-04 10:11:00 · 2 answers · asked by GK27V6 1

Is it because some of the energy is transformed into heat and sound?

2007-11-04 10:00:55 · 7 answers · asked by GK27V6 1

A cockroach of mass m lies on the rim of a uniform disk of mass 2.32m that can rotate freely about its center like a merry-go-round. Initially the cockroach and disk rotate together with an angular velocity of 0.261 rad/s. Then the cockroach walks halfway to the center of the disk. (a) What then is the angular velocity of the cockroach-disk system? (b) What is the ratio K/K0 of the new kinetic energy of the system to its initial kinetic energy?

2007-11-04 09:50:23 · 2 answers · asked by Jason N 2

So I have a soda can that I painted black, and I need to find away to get it to heat up outside with just the sun...any ideas....

2007-11-04 09:21:41 · 3 answers · asked by Anonymous

if there are many forces acting on an object, how can the net force be 0?

PLEASE only answer if you know about science and forces. thnx

2007-11-04 09:20:06 · 1 answers · asked by bluez 2