Physics - October 2006

2006-10-27 16:34:56 · 8 answers · asked by ravindranath v 1

An archer is shooting an arrow at a target directly to the west. The arrow leaves the bow at 31.0 m/s. There is a wind blowing 25.0 degrees east of south at 26.0 m/s. The archer forgets to compensate for the wind. What was the velocity (including and and direction) of the arrow?

2006-10-27 16:34:04 · 7 answers · asked by h_oboe 2

2006-10-27 16:30:01 · 6 answers · asked by ravindranath v 1

u found the densities to be .93g/cubic cm and .79g/cubic cm r these two examples of same liquids or not explain and in the table methyl alcohol has the density .93g/cubic cm

2006-10-27 16:22:09 · 4 answers · asked by john c 1

are these examples of two same liquids or not explain

2006-10-27 16:17:18 · 2 answers · asked by john c 1

what is the required velocity of a cannonball fire at 30 degrees to hit a target 240 feet away

2006-10-27 16:12:49 · 7 answers · asked by Anonymous

2006-10-27 16:10:02 · 2 answers · asked by itsjustmemc 1

In traveling to the Moon, astronauts aboard the Apollo spacecraft put themselves into a slow rotation to distribute the Sun's energy evenly. At tje start of their trip, they accelerated from no rotation to 1.0 revolution per minute during a 12-min time interval. The space-craft can be thought of as a cylinder with a diameter of 8.5m. Determine (A) the angular acceleration, and (B) the radial and tangential components of the linear acceleration of a point on the skin of the ship 5.0 min after it started this acceleration

2006-10-27 16:04:33 · 4 answers · asked by Anonymous

2006-10-27 15:44:26 · 4 answers · asked by erinmaguireo 1

An object is throwed with an angle of 30º and an initlial velocity of 40m/s, if the initial y is 0 in what is the time it is going to take it to y to be 0 again and what is x going to be in that moment?

2006-10-27 15:41:41 · 4 answers · asked by Anonymous

A friend of mine told me that she has ruined remotes and telephones, because she gives off too much electricity. She said she had been hooked up to a volt meter and it said she was giving off between 300 - 400 millivolts. She also says she's been able to charge rechargeable batteries. I find this very interesting, and was wondering if there was other info about this somewhere. It's almost like having super powers (very weak super powers, but powers nonetheless).

2006-10-27 15:41:33 · 6 answers · asked by Erik R 1

What is an example of how Newton's Three Laws affect our everyday life? What's a physical example for each of the Newton's Three Laws? Thanx! =D

2006-10-27 15:39:31 · 7 answers · asked by Anonymous

2006-10-27 15:33:14 · 3 answers · asked by erinmaguireo 1

2006-10-27 15:24:08 · 3 answers · asked by erinmaguireo 1

2006-10-27 15:22:21 · 2 answers · asked by teddybears 3

2006-10-27 15:16:48 · 11 answers · asked by Spadesboffin 3

2006-10-27 15:14:09 · 8 answers · asked by bklynmaster56 1

Assume that there is some suitably strong stable source of gravitation (a black hole, white dwarf, neutron star, whatever) around which an 'oribiter' could establish a stable orbit. Would it be possible to make the orbital radius small enough so that 1) the orbiter's gamma would exceed 2, and 2) its human occupants would not be ripped apart by tidal forces, smashed by the effective gravity inside the orbiter or cooked by radiation from the gravitational source?

If this were possible, wouldn't time for people inside the orbiter pass at half the rate (or less) than it would in the 'rest of the universe' that is at rest in relative terms?

At even higher gammas, such a scheme could be used to go to future time periods by spending pre-determined amounts of time in the orbiter (essentially putting the rest of the universe on 'fast forward'). Of course, this disregards the time and energy it'd take to accelerate/decelerate the orbiter, etc.

2006-10-27 15:14:04 · 5 answers · asked by polyglot_1234 3

Four 6.5 kg spheres are located at the corners of a square of side 0.78 m. Calculate the magnitude and direction of the gravitational force on one sphere due to the other three.

I have tried using the formula with Cavendish's constat it didn't work. I did Gm1m2/r^2 which i got my answer as 9.26E-9 which was WRONG. There is an identical problem in my book with 7.5 kg mass and .6 length of a square side. I did that one the same way and got the right answer in the back. 2.0E-8, could someone tell me how to do my problem correctly? Show steps so i can understand it.

2006-10-27 14:39:28 · 6 answers · asked by leon27607 3

2006-10-27 14:22:23 · 9 answers · asked by Anonymous

its there it takes up space, but yea

2006-10-27 14:22:05 · 7 answers · asked by so so fresh 2

energy, power,

2006-10-27 14:22:05 · 5 answers · asked by sin s 1

Initially a wheel rotating about a fixed axis at a constant angular deceleration of 0.2 rad/s^2 has an angular velocity of 1.88 rad/s and an angular position of 9.4 rad. What is the angular position of the wheel after 2 s (in rad)?

2006-10-27 14:04:03 · 3 answers · asked by Anonymous

2006-10-27 13:51:08 · 13 answers · asked by Good Gushy 3

A skater is initially spinning at a rate of 11.1 rad/s with a rotational inertia of 2.54 kg·m2 when her arms are extended. What is her angular velocity after she pulls her arms in and reduces her rotational inertia to 1.65 kg·m2?

2006-10-27 13:26:24 · 4 answers · asked by Anonymous

and the owner is repairing a flat tire. A friend spins the other wheel (radius r=0.4m) and observes drops of water fly off tangentially. They measure the height reached by the drops moving vertically. A drop that breaks loose from the tire on one turn rises h1 = 78 cm above the tangent point. A drop that breaks loose on the next turn rises h2 = 75 cm above the tangent point. The height to which the drops rise decreases because the angular speed of the wheel decreases. Acceleration of gravity is 9.8 m/s^2 and angular decelaration is constant. Find the magnitude of the angular deceleration fo the wheel in units of rad/s^2.

2006-10-27 13:16:37 · 1 answers · asked by Dee 4

A box slides down a ramp inclined at 35 degrees to the horizontal with an acceleration of 2.25 m/s2. The acceleration of gravity is 9.8 m/s2. Determine the coefficient of kinetic friction between the box and the ramp.

2006-10-27 13:10:34 · 5 answers · asked by Anonymous

should the third sphere of charge 1.0 C be sitiated , so that it experiences no net force?

2006-10-27 12:58:46 · 3 answers · asked by shadab a 2

2006-10-27 12:53:02 · 2 answers · asked by Dave R 1

They can't get particles to move at light speed because, according to relativity, they would be infinitly massive.

2006-10-27 12:39:17 · 4 answers · asked by Anonymous