Physics - December 2006

How would you prove this experimentally, consider vaccum and no high tech devices present.

How would you then calculate the period?

2006-12-13 13:24:51 · 6 answers · asked by Anonymous

Intensity level is 101 decibels at 4.91m. How far away would a person have to be for the sound to barely be audible (at the threshold of hearing).

How do I find this?

2006-12-13 13:14:26 · 3 answers · asked by Jeff H 1

2006-12-13 12:54:00 · 5 answers · asked by Anonymous

Calculate the acceleration of a 330,000 kg jumbo jet before takeoff when the thrust for each of its four engines is 25,000 N.

Thank You:-)

2006-12-13 12:41:06 · 5 answers · asked by Anonymous

Using the following words, fill in the blanks: speed, inertia, acceleration

1) A pool player hits the eight ball, which slams into a second ball. The eight ball stops, but the second ball goes forward, because of ___________.
2) Jim's little sister isn't swinging very high, so he gives her a huge push to get into her higher. This shows an increase in __________.
3) Tom bragged to Tara that he watched a centipede crawl the whole length of his room in the time he did his homework. His room is 16 ft. long and his homework took 2.5 hours, so the centipede traveled at 6.4 ft/hr. What characteristic of motion has he calculated?

2006-12-13 12:25:10 · 3 answers · asked by Red 1

The energy required for a 440 kg mass to climb from the surface of the Earth to a point 6400 km 'above' the surface--i.e., at two Earth radii from the center--can be approximated by first averaging the field strength of the Earth at this point and at its surface.
•Given a surface field strength of 9.8 m/s^2, what is the field strength at two Earth radii from its center? What is the average of these two strengths?

•Using this average to approximate the actual average field strength determine the work necessary to climb from the surface to a point two Earth radii from its center.

2006-12-13 12:14:36 · 3 answers · asked by tanie 1

1) a cheeata runs eastward at a velocity of 27 m/s. 2 seconds later, it tackles its prey to the groud. What is the cheata's acceleration?

2) Any change in position over time is an example of_____ (motion or cceleration)


3)Does a change in acceleratioon affect acelerationn? and can u please explain why for this one


4)A kangarroo hops 60 m to the east in 5 s

what is its veloocity? why?

the kangaroo stops for a drink and then starts hoping again to the south, every second, the kangaroo's velocity increases 2.5 m/s. What is the kangaroos acceleration aftrer 5 seconds? why?

5)A southbound train is traveling at 40 km/hour. A waiter with a tray is walking on the opposite direcction on the train at 3 km/hour. On the tray is a fly walkin g soulth at 1 km/ hour, what's the velocity of the fly to the ground on which the train is traveling. why?

2006-12-13 12:07:13 · 2 answers · asked by Valerie 3

2006-12-13 12:00:55 · 13 answers · asked by Crackerass 2

I'm studying for a physics test and my study sheet says that objects can have momentum in 2 and 3 dimensions. Obviously I can understand 2, but how would 3 work out?

2006-12-13 12:00:20 · 4 answers · asked by person 3

I just don't understand this question, please help!

An object of mass 10.0 kg is released from the top of an inclined plane which makes an angle of inclination of 30.0 degrees with the horizontal. The object slides along the inclined plane. How much work is done by gravity? (Note that the instant when the object has traveled through a distance of 2.00 m is measured along the slope. The coefficient of kinetic friction between the mass and the surface is 0.200. Use g = 10.0 m/s squared):


a. 100 J

b. 20.0 J

c. 0 J

d. 10.0 J

2006-12-13 11:59:26 · 2 answers · asked by shaft0208 1

Objects in Mirrors are closer than they appear, You find this on the mirror aside of your car, why is that why they did not make accurate mirror little bit less risky...

2006-12-13 11:51:05 · 5 answers · asked by Anonymous

When a mass of 25.0 grams is suspended from a certain spring and lowered slowly until the spring stops stretching, the spring stretches 2.00 cm. What is the spring constant of the spring?


a. 1.25 N/m

b. 0.800 N/m

c. 7.85 N/m

d. 12.3 N/m

2006-12-13 11:29:38 · 4 answers · asked by SMS 1

i think it's


Gravitational force= Gm1m2 divided by r squared


but I have no Idea what it stands for so pleas help me out
and tell me what Gm1,m2,andrsquared is, and possibly why it's that way
thanx

2006-12-13 11:28:55 · 6 answers · asked by Valerie 3

a. Watt.

b. Newton.

c. Newton/second.

d. Joule.

2006-12-13 11:28:30 · 4 answers · asked by SMS 1

my 8th grade math teacher gave our class this project... there are lots of things you aren't allowed to do, so please read the following:

ILLEGAL MATERIALS: "Treated" eggs (boiled, soaked in vinegar), rotten eggs. duck tape, reinforced tape, or shiping tape. No peanut butter, jell-o, NO LIQUIDS, powdered soap, flamable liquids, or glass. NO AERODYNAMIC OR RESTRAINING DEVICES OF ANY KIND (that means no parachutes).

COMMERCIALLY CONSTRUCTED CONTAINER ARE ILLEGAL.

CONTAINER MUST HAVE DIMENSION THAT ALL OF WHICH ARE LESS THAN 35 CM.

THE MORE EGGS [THAT LAND UNHARMED], THE BETTER!!!


If you know of any good websites that contain any iformation that could help, PLMK. Thanks.

2006-12-13 11:24:22 · 9 answers · asked by Anonymous

2006-12-13 11:20:43 · 3 answers · asked by clowedbonez 1

2006-12-13 11:20:36 · 5 answers · asked by Anonymous

1) A train is accelerating at a rate of 2.0 km/hr/s. If its initial velocity is 20 km/hr, what is its velocity after 30 seconds?
2) A runner achieves a velocity of 11.1 m/s 9 s after he begins. What is his acceleration?
What distance does he cover?

2006-12-13 11:15:25 · 5 answers · asked by Red 1

Again, I say help if you want and if you have a heart! I tried answering some of these but I have a "poor" PHysics teacher.I have straight A's and 1 B in that class. So, I know it's her not me b/c everyone in her class is failing!!!

17. A projectile is fired at some angle to the horizontal w/ some initial pseed v0, & air resistance is neglected. Is the projectile a freely falling body? What is its acceleration in the vertical direction? What is its acceleration in the horizontal direction?

2. (a) an object has only 1 force acting on it. Can it be at rest? (yes maybe) Can it have accleration (idk) (B) An object has 0 acc. Does this mean that no forces act on it?

3. Is it possible for an obj. to move if no net force acts on it? (No - I think)?

9. In the motion pic IT HAPPENED ONE NIGHT Clark G. is standing inside a sationary bus in front of Claudette Colbert, who is seated. The bus suddenly starts moving forward & clark falls into Claud.s lap. Y did this happen?

2006-12-13 10:52:26 · 4 answers · asked by Anonymous

A solid spherical ball of mass m and radius R rolls without slipping, down an inclined plane that makes an angle @ with the horizontal. There is a frictional force exerted on the ball by the incline, but it is not necessary to know the coefficient of friction to do the problem. The ball starts from rest. Calculate the velocity Vcm of the center of mass of the ball after it has been rolling for t seconds. (hint. consider, among other things, the torque exerted about an exists of rotation through the center of the spherical ball. note that is is not necessary to know where on the plane the ball begins rolling

2006-12-13 10:49:01 · 2 answers · asked by Mark K W 1

Basically, what is it supposed to do?

2006-12-13 10:32:53 · 7 answers · asked by Anonymous

How do you turn gold into nickel, or aluminum for that matter? Is it possible?

Also, how do you turn platnum into brass? (If it's possible)

2006-12-13 10:27:56 · 11 answers · asked by robert 3

A block starts at rest and slides down a fric-
tionless track.
The acceleration of gravity is 9.81 m/s2 :
It leaves the track horizontally, striking the
ground.

a) At what height h1 above the ground is the
block released? Answer in units of m.


Givens: h2(second height)=2.6m
Mass m of block =481g
After leaving the track the block lands 5.2m away from the
point it leaves.

2006-12-13 10:24:21 · 2 answers · asked by TheThing 2

If everyone in the world ran west at the same time would that cause the earth to spiral out of orbit with the sun?

2006-12-13 10:22:08 · 9 answers · asked by robert 3

Note: Here "g" is the acceleration due to gravity at the particular place.

2006-12-13 10:21:19 · 4 answers · asked by Daredevil 3

2006-12-13 09:45:07 · 4 answers · asked by Ricky 1

2006-12-13 09:44:36 · 5 answers · asked by bhangraking777 1

2006-12-13 09:31:31 · 3 answers · asked by guttaboi931 1

Einstein said: There is a limit a theory or concept may be simplified, after which meaning is lost. From the other side we are quickly approaching an information singularity: by the time a person finishes his studies, the information aquired would be obsolate( See lecture of Dr. Vernon Vinge 1993) We obviously must discover a more efficient teaching method !!!
an example: Less than 1% of the World can possibly understand the space dynamics perfected by Lagrange in the 18'th century

2006-12-13 09:30:18 · 4 answers · asked by Anonymous

2006-12-13 09:28:20 · 7 answers · asked by Ricky 1