Physics - September 2007

2007-09-14 00:45:03 · 8 answers · asked by anirudhkrpr 2

The position of a small object is given by X=34+10t+2t^3, where t is in seconds and x in meters. X is a function of t when graphed t=0 to t=3.0.

what is the average velocity of the object between 0 and 3.0s? at what time between 0 and 3.0s is the instantaneous velocity zero?

2007-09-14 00:27:26 · 3 answers · asked by Mimi 1

2007-09-14 00:08:20 · 3 answers · asked by Anonymous

"Gravity explains the motions of the planets, but it cannot explain who set the planets in motion. God governs all things and knows all that is or can be done." Issac Newton

Tiner, J.H. (1975). Isaac Newton: Inventor, Scientist and Teacher. Milford, Michigan, U.S.: Mott Media.

2007-09-13 23:43:55 · 6 answers · asked by ? 2

If a body is thown upward, its gravitational acceleration becomes "-"9.8m/s.If a body is dawn nearer to the centre of earth, what will be its gravitational acceleration?e.g. if a pit is dug in to earth and the body is thrown in to it. Explain.

2007-09-13 22:26:50 · 9 answers · asked by Princess 3

If you are driving a car with the speed of light, what would happen if you turn on the head lights?
Please donot say that you cannot drive at the speed of light or if you drive at the speed of light,you'll be converted in to energy because this can be possible in the coming centuries.

2007-09-13 22:15:32 · 5 answers · asked by Princess 3

What is a universe?

2007-09-13 21:53:42 · 6 answers · asked by Princess 3

Hi everyone!

can anybody please give me instructions (& the materials needed) in making a capacitor using easy-to-find materials?

This is for a physics project.

Thank You!

2007-09-13 21:45:13 · 6 answers · asked by eTcetErA 2

2007-09-13 21:25:15 · 5 answers · asked by Anonymous

An airplane which has a 420 mi/hr ground speed in still air is flying with its nose toward the north. A 60 mi/hr wind is blowing 30 degrees south of west. What are the magnitude and direction of the airplane's velocity relative to the ground?

2007-09-13 21:22:54 · 2 answers · asked by Anonymous

If a body is moving with uniform velocity,so it have 0 acceleration.In the example i created, a body is moving with uniform velocity and the force applied to it is lets say 10 N.what will be the mass of the body?solve it with ;
F=ma

2007-09-13 21:14:09 · 5 answers · asked by Princess 3

How do you explain using surface tension why a paper clip floating on water will sink if you put a drop of detergent in the water with it?

2007-09-13 20:26:17 · 2 answers · asked by beleaguered_idiot 1

it's similar to potential energy and kinetic energy

2007-09-13 20:21:10 · 5 answers · asked by Anonymous

2007-09-13 20:07:54 · 6 answers · asked by Anonymous

A stone is thrown horizontally with an intial speed of 8.0 m/s from the edge of the cliff. A stopwatch measures the stone's trajectory time from the top of the cliff to the bottom to be 3.4 s . What is the height of the cliff?

Thanks

2007-09-13 20:01:15 · 3 answers · asked by Anonymous

this in relation to physics or aerodynamics because i am working on a water bottle rocket project.

2007-09-13 19:37:34 · 3 answers · asked by toilet_bowl_69ers 2

2007-09-13 19:30:36 · 1 answers · asked by Anonymous

If I am to be woken in the night, I first start to experience my dreams and then awaken.So a future event (my waking) directly causes effects (my conscious experiencing of dreams) in the present. Does this prove that time is not linear?

2007-09-13 19:12:15 · 3 answers · asked by Peter A Child 1

If you have a standard pulley problem (basically a string over a frictionless, massless pulley) and you've got a weight of W1 on one side and a strong man on the other side. What's the upper limit of W1 that the strong man can pull?

Intuitively, I want to say his weight, but I'm not so sure about that.

2007-09-13 18:42:47 · 1 answers · asked by ufralphie 2

Another Question My Teazher Asked Me This What Two Dimensional Shapes Can Result When Various Three Dimensional Objects Are Sliced

2007-09-13 18:27:11 · 3 answers · asked by marquise258 1

2007-09-13 17:23:49 · 1 answers · asked by Jonathan L 2

at a speed of 65 km/h?

2007-09-13 16:31:16 · 5 answers · asked by abbs 2

1. The density of an object is 1000 mg/µm3. Calculate its density in SI.

2. A train is speeding with an acceleration of 0.18 km/h2. Calculate its acceleration in SI units.

3. A cubic container measuring 2 in x 2 in x 2in is filled with water.

a. What is the volume of this container in (in3)?
b. What is the volume of this container in (m3)?
c. What is the volume of this container in liters?
d. What is the mass of the water in kilograms?

I have worked on 22 of these problems, but I am stuck on these last 3 . Thank you in advance for any help you can provide with any of the questions. If you could provide a link to a website or a brief explanation (show work), I would greatly appreciate it. Thanks, again!

2007-09-13 16:13:07 · 2 answers · asked by Heather 3

2. will a listener notice the Doppler effect if he or she and the source of the sound are traveling toward eachother?

can anybody answer any of these questions?

2007-09-13 15:51:16 · 4 answers · asked by rissa 2

resultants, vectors, with just two units, formula

2007-09-13 15:33:45 · 1 answers · asked by Anonymous

1. During the Winter Olympics at calgary in 1994. Dan Jansen of the United States skated 5.00 x 10^2 m in 35.76 s. Suppose it takes Jansen 4.00 s to increase his speed from zero to his maximum speed, which is 10.0% greater than his average speed during the whole run. Calculate the magnitude of Jansen's average acceleration during the first 4.00s.
2. The winding cages in mine shafts are used to move workers in and out of the mines. These cages move much faster than any commercial elevators. In one South African mine, speeds of up to 65.0 km/h are attained. The mine has a depth of 2072 m. Suppose two cages start their downward journey at the same moment. The first cage quickly attains the maximum speed ( an unrealistic situation) then proceeds to descend uniformly at that speed all the way to the bottom. The second cage starts at rest and then increases its speed with constant acceleration of 4.00 x 10^-2 m/s/s. Which cage will reach the bottom first, and how long will it take?

2007-09-13 15:29:29 · 2 answers · asked by ~SMCM101~NYC 2

2007-09-13 15:00:04 · 16 answers · asked by Anonymous

A scientist is completely isolated inside a smooth moving box that travels a straight-line path through space, and another scientist is completely isolated in another box that is spinning smoothly in space. Each scientist may have all the scientific goodies she likes in her box for the purpose of detecting her motion in space. The scientist in the:

a) traveling box can detect her motion.
b) spinning box can detect her motion.
c) ...both can detect their motions.
d) ...neither can detect their motions.

2007-09-13 14:49:04 · 3 answers · asked by ? 6

they say it is the speed of an object at one moment but how can you measure speed without incorperating an amount of time?

2007-09-13 14:39:52 · 4 answers · asked by Anonymous

require is the aircraft is to be airborne after a takoff run of 200m? answer is 2.78 m/s^2
Now How long does it take the aircraft to become airborne?

2007-09-13 14:38:40 · 1 answers · asked by hockeywinger14 1