Physics - June 2007

The bowl has to be perfect so that when you drop a ball on the edge it takes the same time to reach the center as any other spot on the edge.

2007-06-05 14:50:23 · 2 answers · asked by House, M.D. 4

A. a chain reaction
B. a chemical reaction
C.nuclear fission
D. nuclear fussion

2007-06-05 14:29:10 · 2 answers · asked by lady_hustla_09 1

A 0.44 kg rock is projected from the edge of the top of a building with an initial velocity of 9.32 m/s at an angle of 40 degrees above the horizontal . Due to gravity, the rock strikes the ground at a horizontal distance of 15.6 m from the base of the building. Assume the ground is level and that the side of the building is vertical. The acceleration of gravity is 9.8 m/s^2. How tall is the building?


2) A cannon sends a projectile towards a target a distance 1350 m away. The initial velocity makes an angle 33 degrees with the horizontal. The target is hit. The acceleration of gravity is 9.8m/s^2. What is the magnitude of the initial velocity? Answer in units of m/s

2007-06-05 13:04:18 · 2 answers · asked by Anonymous

A 50kg student threw a 40kg ball with a speed of 20 m/s what was the magnitude of the impluse that the student exerted on the ball?

2007-06-05 12:00:04 · 1 answers · asked by Anonymous

studying for my science final......

2007-06-05 11:43:20 · 1 answers · asked by sutol j 1

or would it sit there with its "skirt" flapping madly like a gibbon

2007-06-05 11:17:30 · 7 answers · asked by Anonymous

I've always wondered this. I understand how the concept of an absolute zero works. But isn't it possible for the molecules of something to move too fast? For example, what if a substance was heated up so much that the speed of the molecules approached the speed of light?

2007-06-05 10:41:46 · 5 answers · asked by wiccanferi 2

I need the information fast...... I need it for my science olympiad. I need it to be pretty light and hold alot of weight(sand)

2007-06-05 10:26:49 · 2 answers · asked by Faris A 1

FIND...
a. the constant acceleration fo the wheel..
b. the initial angualr velocity of the wheel...

so i tryed doing it myself and got 6.37rad/s^2 for a .....& -.98rad/s for b....am i right??

2007-06-05 10:14:11 · 2 answers · asked by a.n. 1

How do you explain that?

2007-06-05 09:55:17 · 4 answers · asked by Anonymous

2007-06-05 09:39:05 · 21 answers · asked by Anonymous

It's kinda crazy but ants have invaded our kitchen through our microwave somehow, so I figure the best way to clear them out is to just turn on the microwave, right? I turn it on for a minute and they are unaffected. So I make sure the microwave is working by putting a bowl of water in it and set it again. The water is boiling but the ants are still unaffected! I'm pretty sure they have at least some water molecules in their bodies. Anyone know why the waves don't affect them?

2007-06-05 09:27:33 · 9 answers · asked by Gearz 2

Diameter of the bottom of the cylinder is d = 10cm, and
its height is H = 1m.
At some moment of time the bubble leaves from bottom
and floats to the top.

By how much the net force of pressure on the bottom
changed?

Cylinder is rigid and full of incompressible water
(except for the bubble).

2007-06-05 09:26:59 · 1 answers · asked by Alexander 6

2007-06-05 09:04:58 · 8 answers · asked by Anonymous

How many km (on the ground)) to the horizon in front and behind can you see?

2007-06-05 08:45:58 · 4 answers · asked by carflyguy 1

Locomotive pulls 500,000 cars, each car 1km long.

In 1 second locomotive accelerates from 0km/s to
4/5 c = 240,000 km/s, total distance moved by the
locomotive is 120,000 km.

At this speed each car shrinks to √(1 - (4/5)²) = 3/5 km.

What distance did the last car travel in 1 second?

2007-06-05 08:02:58 · 4 answers · asked by Alexander 6

2007-06-05 07:54:58 · 7 answers · asked by iceman_0022 2

Why do we have reflections? In the mirror, in shiny wood, in water. Everything big enough to see has a reflection but why and how?

2007-06-05 06:59:20 · 2 answers · asked by JadalaStar 1

what happens if you put night vision goggles on in the dark and look at a mirror?

2007-06-05 06:44:57 · 5 answers · asked by Anonymous

In 1998, NASA launched Deep-Space 1 (DS-1), a spacecraft that successfully flew by the asteroid named 1992 KD (which orbits the sun millions of miles from the earth). The propulsion system of DS-1 worked by ejecting high-speed argon ions out the rear of the engine. The engine slowly increases the velocity of DS-1 by about 19.0 m/s per day.
(a) How much time (in days) would it take to increase the velocity of DS-1 by 13700 m/s?
days

(b) What was the acceleration of DS-1 (in m/s2)?
m/s2

2007-06-05 06:25:50 · 1 answers · asked by M&M 2

what are at least five different electrical appliances (loads).
describe (please!) the energy conversions that occur with each one and the purpose(s) of each conversion process.

2007-06-05 06:18:46 · 3 answers · asked by princess 2

Can people use solar energy all the time? How can we solve this problem?

2007-06-05 06:09:56 · 7 answers · asked by stephaniiieex 1

A 2.00 kg aluminum block and a 6.00kg copper block are connected by a light string over a frictionless pulley. the two blocks are allowed to move on a fixed steel block wedge ( of angle O=30.0 degrees). making use of table 4.2, determine:

(a) the acceleration of the two blocks and (b) the tension in the string

table 4.2
Coefficients of friction
Steel on steel: us 0.74, uk 0.57
aluminum on steel: us 0.61, uk 0.47
copper on steel: us 0.53. uk 0.36


**Please note the "u" are the funny little cursive ones, I dont know what they are called..

2007-06-05 06:01:37 · 1 answers · asked by Anonymous

A dockworker loading crates on a ship finds that a 20kg crate, initially at rest on a horizontal surface, requires a 75N horizontal force to set it in motion. However, after the crate is in motion, a horizontal force of 60N is required to keep it moving with a constant speed. find the coefficients of static and kinetic friction between crate and floor

2007-06-05 05:52:10 · 2 answers · asked by Anonymous

i dont know if thats a coherent question lol but i tried, thx if you can figure it out

2007-06-05 05:48:39 · 22 answers · asked by Anonymous

In 1954 the English runner Roger Bannister broke the four minute barrier for the mile with a time of 3:59.4 s (3 min and 59.4 sec). In 1999 the Moroccan runner Hicham el-Guerrouj set a record of 3:43.13 s for the mile. If these two runners had run in the same race, each running the entire race at the average speed that earned him a place in the record books, el-Guerrouj would have won. By how many meters?

2007-06-05 05:37:12 · 4 answers · asked by M&M 2

A 2,00kg car slowed down uniformly from 20.0m/s to 5.00 m/s in 4.00 s.

(a) what is the average force acted on the car during that time and (b) how far did the car travel during that time?

2007-06-05 05:29:26 · 2 answers · asked by Anonymous

This is theoretical science, I am however looking for hard evidence.

Recently scientists have made light travel faster than the standard definition as well as other parts of the electromagnetic spectrum.

If it is possible for energy to form as a matrix conscious then that possibility could hold the prospect of traveling faster than light and thus not breaking the law of relativity.

All theories welcome.

2007-06-05 05:09:38 · 5 answers · asked by Anonymous

2007-06-05 05:03:46 · 4 answers · asked by Alexander 6

two people are pulling a boat through water. Each exerts a force of 600N directed at a 30.0 degree angle relative to the forward motion of the boat. If the boat moves with constant velocity, find the resistive force (F) exerted by the water on the boat

2007-06-05 05:01:03 · 4 answers · asked by Anonymous