Physics - November 2006

2006-11-19 15:56:41 · 4 answers · asked by John D 1

A 0.600 kg ball is on the end of a rope that is 1.77m in length. the ball and rope are attached to the pole and the entire apparatus, including the pole, rotates about the pole's symmetry axis. The rope makes an angle of 68 degrees with respect to the vertical. WHAT IS THE TANGENTIAL SPEED OF THE BALL?

2006-11-19 15:55:11 · 1 answers · asked by John D 1

Please show the three steps of problem solving when answering this question

2006-11-19 15:48:09 · 5 answers · asked by i am what i am 2

A tsunami (commonly called a “tidal wave” because of its effect is like a rapid change in tide) is a fast moving ocean wave caused by an underwater earthquake. The water first goes down from its normal level then rises at an equal distance about its normal level, and finally returns to its normal level, the period is about 15 minutes.

Suppose that a tsunami with an amplitude of 10 meters approaches pier Honolulu, where the normal depth of water is 9 meters.

2006-11-19 15:32:09 · 3 answers · asked by jordan21s 1

Please show the 3 steps of problem solving when answering this question.

2006-11-19 15:29:53 · 5 answers · asked by i am what i am 2

Can someone help me with my precalculus problem? Can you please read the following problem and figure out the?

Can someone help me with my precalculus problem? Can you please read the following problem and figure out the equation for me along with how you figure this out?


A tsunami (commonly called a “tidal wave” because of its effect is like a rapid change in tide) is a fast moving ocean wave caused by an underwater earthquake. The water first goes down from its normal level then rises at an equal distance about its normal level, and finally returns to its normal level, the period is about 15 minutes.

Suppose that a tsunami with an amplitude of 10 meters approaches pier Honolulu, where the normal depth of water is 9 meters.

2006-11-19 14:55:46 · 5 answers · asked by jordan21s 1

I dont understand my physics homework at all

Should i just quit ive already done all i could do?

2006-11-19 14:54:59 · 9 answers · asked by clayzer08 1

2006-11-19 14:51:38 · 10 answers · asked by kstoners1 1

Been trying to do this problem but no luck, can ya help me, Thanks.

In this problem, you will be asked to analyze portions of a famous "thought experiment." To explain the orbital motion of the Moon, Newton imagined a cannon that could fire a cannonball horizontally at a great speed. He reasoned that the cannonball's motion was fundamentally the same as the Moon's. He linked projectile motion with orbits, bringing celestial bodies into the realm of everyday experience.

Consider the Earth to be a perfect sphere of radius r = 6.38×106 m. Imagine that the cannon is mounted on a tower 125 meters above the surface of the Earth. Ignore, as Newton did, air resistance, mountains and the motion of the Earth.

The cannon fires the cannonball horizontally, tangent to the Earth's surface. The faster the cannon fires the ball, the farther it goes before striking the ground. You wish to fire a ball at a speed so great that it never hits the ground: The spherical Earth curves down and away from it at exactly the same rate at which it falls. In this scenario the cannonball will describe a circular trajectory, circling the Earth at a constant height of 125 m. It will return to strike the cannon in the rear.

To determine the necessary speed, consider what happens during the first 1.00 km of horizontal displacement of the cannonball. You will calculate the vertical displacement, using the curvature of the Earth.

(a) Suppose you draw a line tangent to the Earth's surface at the location of the cannon tower, and extend it exactly 1.00 km in the direction of the cannonball's path. What is the angle θ (in radians) that this line segment subtends at the center of the Earth? (b) You can draw a right-angled line from the end of the red segment down to the ground in order to measure the "fall-away" y of the Earth's surface. This very nearly equals the opposite side of a triangle whose base angle is θ/2. Use tan θ/2 in an equation to approximate the Earth's vertical fall-away y in a horizontal distance of 1.00 km (state your answer as a positive number). (c) How fast must you fire the cannonball so that its fall after one horizontal kilometer equals the fall-away of the Earth? (d) Newton used the cannon as a "thought experiment" to explain (circular) orbital motion. Why is the trajectory of the cannonball not parabolic?

2006-11-19 14:34:13 · 2 answers · asked by oscarv_56 1

first ball is at rest and second ball is shoot towards the first ball. After collision one ball rolls to one side at an angle and other to other side at an angle, forming a Y. Balls are of equal mass. Is collision between 2 billard balls elastic or inelastic.
(please only try to post if100% sure)

2006-11-19 13:47:57 · 4 answers · asked by Anonymous

2006-11-19 13:42:45 · 4 answers · asked by mimi 1

2006-11-19 13:31:51 · 3 answers · asked by Sang 1

An athlete executing a long jump leaves the ground at a 20° angle and travels 7.30 m. What was the takeoff speed? If this speed were increased by just 3.0 percent, how much longer would the jump be?

2006-11-19 13:11:27 · 3 answers · asked by Anonymous

2006-11-19 13:09:18 · 1 answers · asked by hwt_275 1

The scenario is a lighthouse at the North Pole, whose beam rotates at 1 revolution per second. Ignoring attenuation by the earth's atmosphere and the rotation of the earth, my original question was how far along the beam would it be travelling tangentially at the speed of light. The answer that were provided said that the "beam" is not solid and that in fact the photons in the beam are all travelling radially, with no tangential component. This I can accept. Now for my next installment:
Imagine that there is a mirror in the shape of an anulus (ring) at a distance "d" from the lighthouse:
1) What is the value of "d" (let's call it D) such that the intersection of the beam of light and the anulus moves at the speed of light (c)?
2) If the anulus was at a distance of 2D from the lighthouse, what will the speed of the intersection of the beam and the anulus be? Let's call it z.
3) What will I observe as I look towards the anulus from the lighthouse?(i.e. direction of reflected light

2006-11-19 12:56:59 · 3 answers · asked by Mez 6

2006-11-19 12:50:39 · 7 answers · asked by Sang 1

2006-11-19 12:42:14 · 2 answers · asked by ask123 1

in a movie projector (with actual film, and not a digital tape or whatnot) does the frame actually stop over the lense? or is there continuous motion with a shutter for the light?

if you know the answer, can you back it up in a meaningfull way?

Help settle a bet!!! thanks.

JMK

2006-11-19 12:19:56 · 6 answers · asked by dingwallplayer 2

2006-11-19 12:17:20 · 2 answers · asked by Xrostee 1

What is frequency shift keying?

A. method of coding voice sounds
B. method of sending digital information on radio
C. method of sending voice on the internet
D. method of coding music on an MP3
E. Apple's method of digital recording

2006-11-19 12:13:47 · 1 answers · asked by hoejyland 3

2006-11-19 12:12:16 · 4 answers · asked by John S 1

To find the kinetic friction do I have to find kinetic energy for individual directions (N-S or E-W)

2006-11-19 11:51:35 · 2 answers · asked by 8 3

is the earth magnetic field bigger/smaller according yo my altitude? is the earth magnetic field bigger smaller according to my latitude?what is the value of earth magnetic field at the sea level in the equator?can the earth magnetic field move/rotate a magnetic bar?how do i calculate the force/moment of last question?
plz give me units,formulas,values of earth magnetic field biography would be nice. thx everyone for your time taken to answer and sharing knowledge msn: sergioqcostas@hotmail.com contact me if u have answers plz. :)

2006-11-19 11:45:27 · 3 answers · asked by sergioqcostas 1

1. Explain why free-fall acceleration can be regarded as a constant for objects falling within a few hundred miles of Earth's surface.


2.Calculate the mass in kg of an object that wieghs 1225 N on Earth.


3.Apply Newtons first and second laws to expalin why an object moving in a circular path at a constant speed is undergoing acceleration and has a force exerted on it.

4.Determine the force needed to accelerate a 1357 kg car forward at 8.0 m/s^2.

5. Indicate which of the following has greater momentum: a 500 kg car moving at 64 km/h, a 250 kg cart moving at 128 km/h, or a 1000kg truck moving at 32 km/h.

please help at least anwser one please i'm begging

2006-11-19 11:28:28 · 5 answers · asked by Sarah S 1

1)distance
2)speed
3)power
4)force

Please Help!!

2006-11-19 11:03:59 · 3 answers · asked by Anonymous

Chair??

1)70.2 N
2)80 N
3)89.8 N
4)784 N

Please Help!!

2006-11-19 11:01:45 · 7 answers · asked by Anonymous

A gymnast is performing a floor routine. In a tumbling run she spins through the air, increasing her angular velocity from 3.00 to 5.95 rev/s while rotating through one-half of a revolution. How much time does this maneuver take?

2006-11-19 10:57:52 · 4 answers · asked by Anonymous

At what angle will the system be in equilibrium? (in degrees)

1)-45
2)-30
3)30
4)45

PLEASE HELP!!

2006-11-19 10:57:28 · 2 answers · asked by Anonymous

on an icy day, what is the safest speed to go around the curve?

2006-11-19 10:52:32 · 1 answers · asked by Moose 2

for example if u look at a pen under a magnifying glass then the measurement u see under the mag. glass will be smaller than the actual measurement. And is it a "large" difference or a "small" difference? For example a pen's actual measurement is 15cm...so what approx. would the measurement under the mag. glass be?

2006-11-19 10:51:36 · 2 answers · asked by beautifullydramatic818 1