Physics - November 2007

A string with a length of 0.5m is fixed at both ends.

2007-11-07 00:59:25 · 2 answers · asked by Anonymous

2007-11-06 23:41:16 · 3 answers · asked by Anonymous

2007-11-06 23:36:54 · 2 answers · asked by manna eater 3

The system is at rest. The block of steel weighs 800 N. The coefficient of static friction between the block and table is 0.3. What maximum weight can the steel ball have so the block will still remain at rest?

please identify the given, formula and solution..thank you!.

2007-11-06 23:27:20 · 2 answers · asked by Anonymous

A force F = Fxi + Fyj acts on a object with Fx = 5 N and Fy= 6N
The angle between F and the displacement vector s is 36 and 130 J of work is done by F.

What is the magnitude of vector s

2007-11-06 23:27:18 · 1 answers · asked by njbadboy4life2005 3

2007-11-06 22:55:32 · 10 answers · asked by bob m 3

2007-11-06 22:16:16 · 8 answers · asked by Anonymous

What depth of metal can radio waves penetrate? Does that depth change with frequency? How about Gamma-Rays and X-Rays?

2007-11-06 19:59:34 · 4 answers · asked by gabrielcuellar 1

2007-11-06 18:38:00 · 9 answers · asked by wezjamizon 1

please only answer if you know what you are talking about.
=]

2007-11-06 16:11:00 · 2 answers · asked by alyssa_17t 1

If Orgo is 35 meters from Zorna,how high is the kite?

Plz help i dont get it

2007-11-06 15:47:10 · 3 answers · asked by Kericho C 1

a few exam questions that are throwing me...
A 480 kg car moving at 14.4 m/s hits from behind another car moving at 13.3 m/s in the same direction. if thee second car has a mass of 570 kg and a new speed of 17.9 m/s what is the velocity of the first car after the collision?

A child pulls on a wagon handle at an angle 37° above the horizonatal with a force of 45N. if the wagon accelerates at 8.1m/s^2 horizontally, what is the mass of the wagon?

A person who normally weighs 200 lbs is standing on a scale inside an elevator. the elevator is moving upwards with a speed of 7 m/s, then begins to slow down at a rate of 5 m/s^2. before the elevator begins to slow down, the reading of the scale is ? and while the elevator is slowing down the reading of the scale is?
The choices are:
less than 200lbs, 100lbs
greater than 200lbs, 100lbs
200lbs, 100lbs
greater than 200lbs, 0lbs
none

THANKS

2007-11-06 15:12:08 · 1 answers · asked by nothankyou1110 2

2007-11-06 14:58:44 · 4 answers · asked by britt-britt r 1

2007-11-06 14:50:45 · 4 answers · asked by myfrigginjunklist 2

A car traveling at 50 km/hr skids a distance of 35 m after its brakes lock. Estimate how far it will skid if its brakes lock when its initial speed is 100 km/hr.

2007-11-06 14:47:01 · 2 answers · asked by Anonymous

I was given this physics problem but I'm not too sure on how to approach it. It reads:

For tests using a ballistocardiograph, a patient lies on a horizontal platform that is supported on jets of air. Because of the air jets, the friction impeding the horizontal motion of the platform is negligible. Each time the heart beats, blood is pushed out of the heart in a direction that is nearly parallel to the platform. Since momentum must be conserved, the body and the platform recoil, and this recoil can be detected to provide information about the heart. For each beat, suppose that .050 kg of blood is pushed out of the heart with a velocity of +.25 m/s and that the mass of the patient and platform is 85 kg. Assuming that the patient does not slip with respect to the platform, and that the patient and the platform start from rest, determine the recoil and velocity.

Thanks to anyone who attempts this. I'm really stumped and any explanations, tips, and details will be a great help!

2007-11-06 14:44:20 · 3 answers · asked by doubtful 2

A simple pendulum with a length 1.50 m makes 81.6 oscillations in 180 s. What is the acceleration due to gravity at its location? (It is not located on Earth!)

2007-11-06 14:35:30 · 1 answers · asked by Anonymous

2007-11-06 14:25:30 · 2 answers · asked by scrub 2

2007-11-06 14:01:56 · 2 answers · asked by Max Havelaar 2

2007-11-06 13:33:24 · 3 answers · asked by Anonymous

So, water balloons are launched from a catapult in a room with a ceiling of 3.9 m. If the initial velocity is 11 m/s, and the acceleration of gravity is 9.8 m/s, at what angle are the balloons launched to just graze the ceiling?

2007-11-06 13:30:27 · 1 answers · asked by letisha james 1

String theory says every particle is a vibrating string and the amount of tension in the string results is differentiates the particle. Just for convenience I refer normal energy to a photon. According to string theory, a photon is a vibrating string with some tension. Or tension in the string and the string are both included to make up the photon. If I stretch a rubber band, the band has some potential energy, well you know. So what is the cause of the tension in the string that makes a photon. It is not normal energy since, because normal energy is made up of a string and the tension in it. So what causes the tension in the string.

2007-11-06 13:27:23 · 5 answers · asked by rajurenjitgrover 1

There's 3 parts to the question:

a. What is the momentum of an 8-kg bowling ball rolling at 2 m/s? (momentum = mass x velocity)

b. If the bowling ball rolls into a pillow and stops in 0.5 s, calculate the average force it exerts on the pillow.

c. What average force does the pillow exert on the ball?

2007-11-06 13:19:14 · 3 answers · asked by Anonymous

In a series L-R-C circuit, the components have the following values: L=20.0 mH C=140 nF, and R=350ohms. The generator has an rms voltage of 120 V and a frequency of 1.25 kHz.

1) Determine the average power supplied by the generator.

2)Determine the average power dissipated in the resistor.

I can't seem to find help on this from the book so can someone please eloborate.?

2007-11-06 13:15:05 · 5 answers · asked by frozenlint 2

please help me with the question.thanks!!

2007-11-06 12:49:25 · 5 answers · asked by ninz.07 1

A flat uniform circular disk (radius = 5.56 m, mass = 140 kg) is initially stationary. The disk is free to rotate in the horizontal plane about a frictionless axis perpendicular to the center of the disk. A 49.0-kg person, standing 1.46 m from the axis, begins to run on the disk in a circular path and has a tangential speed of 2.00 m/s relative to the ground. Find the resulting angular speed (in rad/s) of the disk.

2007-11-06 12:35:44 · 1 answers · asked by sweet_dreams 1

2007-11-06 12:30:38 · 1 answers · asked by Anonymous

2007-11-06 12:27:57 · 2 answers · asked by diddlyidledave 1

Like in an atom bomb how do they split the atom?

2007-11-06 12:08:50 · 4 answers · asked by cody 2

A hoop, a uniform solid cylinder, a spherical shell, and a uniform solid sphere are released from rest at the top of an incline. What is the order in which they arrive at the bottom of the incline? Does it matter whether or not the masses and radii of the objects are all the same?
Explain.

2007-11-06 11:48:59 · 1 answers · asked by Anonymous