Physics - December 2006

2006-12-15 12:31:10 · 2 answers · asked by Anonymous

and how you find it with given N crate of apples sitting on a ramp at x degree?

2006-12-15 12:05:18 · 2 answers · asked by Urielle 2

Pam has a mass of 35.2 kg and she is at rest on smooth, level, frictionless ice. Pam straps on a rocket pack. The rocket supplies a constant force for 19.4 m and Pam acquires a speed of 63.4 m/s. What is the magnitude of the force in N? And what is her final kinetic energy (in joules)?

2006-12-15 11:47:27 · 1 answers · asked by Derrick Z 1

What if I made a beam of highly concentrated and high frequency radio waves. Would it not burn a hole in you by heat (like a microwave) or give you cancer?

2006-12-15 11:38:51 · 5 answers · asked by Anonymous

What algebraic relationship expresses the displacement of an object in terms of its average velocity and elapsed time of travel?

2006-12-15 11:25:27 · 3 answers · asked by ahmad 1

In cases of uniformly accelerated motion, how may the final velocity be expressed in terms of initial velocity, acceleration, and elapsed time?

2006-12-15 11:25:04 · 3 answers · asked by ahmad 1

2006-12-15 11:21:49 · 5 answers · asked by G Constant 2

2006-12-15 11:03:55 · 7 answers · asked by Anonymous

Pam has a mass of 35.2 kg and she is at rest on smooth, level, frictionless ice. Pam straps on a rocket pack. The rocket supplies a constant force for 19.4 m and Pam acquires a speed of 63.4 m/s. What is the magnitude of the force in N? And what is her final kinetic energy (in joules)?

2006-12-15 10:58:58 · 3 answers · asked by Anonymous

An archer puts a 0.2 kg arrow to the bowstring. An average force of 189.8 N is exerted to draw the string back 1.44 m. g=9.8 m/s/s and assume no friction loss. With what speed does the arrow leave the bow (in m/s) and how high does it go if it is shot straight up (m)? No time is given.

2006-12-15 10:56:03 · 1 answers · asked by Anonymous

Don't they both deal with input and output forces?

2006-12-15 10:43:02 · 4 answers · asked by ZZ 4

2006-12-15 10:35:42 · 26 answers · asked by DWC 1

If electricity travels at the speed of light, and computers use electricity, why does it take a few seconds to load a webpage thats in china or something?

2006-12-15 10:20:27 · 6 answers · asked by beavis n butthead 2

Just a thought here. Is it possible to travel back in time by circling the Earth around the equator, going over the International Date Line, faster than the Earth itself is spinning. (I know, it's a scenario from an old Superman film, but is it possible all the same - surely, if you can do it in less than 24 hours, you will cross the International Date Line twice, backwards, in 24hrs so you are two days back in less than a day)

2006-12-15 10:11:03 · 16 answers · asked by Anonymous

2006-12-15 09:53:02 · 2 answers · asked by Anonymous

I am taking both classes and I have a B+ in Physics and a C+ in Chemistry

2006-12-15 09:48:27 · 6 answers · asked by ar 5

Tarzan needs to cross a river. He grabs the lower end of a 4.4 m long vine initially hanging at 36 degrees from the vertical and pushes off with an initial speed of 4.4 m/s. What is Tarzan's speed at the lowest point of his swing on the vine (in m/s)? Neglect frictional forces and g=9.8 m/s/s.

2006-12-15 09:39:39 · 1 answers · asked by Anonymous

A rubber ball has the property that, on any given bounce, it returns to one-third of the height from which it just fell. Suppose the ball is dropped from 108 feet. How far has the ball traveled the fourth time it hits the ground?

2006-12-15 09:09:04 · 3 answers · asked by TheRenegade 1

what will happen to a shadow of an object if the distance between an opague object and the light source is INCREASED?

2006-12-15 09:04:22 · 1 answers · asked by Anonymous

A cart of mass 1.7 kg coasts 70 cm up an incline at 6 degrees with horizontal. Assume that frictional and other nongravitational forces parallel to the incline are negligible.
•What is the component of the cart's weight parallel to the incline?
•How much work does this force do as the cart rolls up the incline?
•How much work does the net force do as the cart rolls up the incline?
•Using the definition of kinetic energy determine the velocity of the cart after coasting the 70 cm, assuming its initial velocity to be zero.

2006-12-15 08:56:40 · 1 answers · asked by tan 1

A regular tennis ball and another one filled with sand are dropped at the same time from the top of a high building. Your friend says that even though air resistance is present, both balls should hit the ground at the same time because they are the same size and "plow through" the same amount of air. What do you say?

2006-12-15 08:46:34 · 6 answers · asked by Anonymous

2006-12-15 08:21:53 · 5 answers · asked by Laris 1

I know that as temperature increases the resistance of bulb will also increase. I don't know how to estimate the temperature of the filament for a given resistance.

Note: I am looking for a relationship something like R is proportional to T or R is propotional to T^2 or something like that....

Please help!

2006-12-15 08:11:30 · 3 answers · asked by blue_knight 2

2006-12-15 08:01:24 · 8 answers · asked by Anonymous

if both are dropped at the same time under the same conditions. I say yes, my friends say no. Gravity is the same for all falling object right? Where can i find info. to show them?

2006-12-15 07:23:06 · 12 answers · asked by joshjones007 1

tools?

2006-12-15 07:20:15 · 7 answers · asked by LevitatingYogi 2

A simple harmonic oscillator of mass 7 kg has a period of 50 seconds. What is its restoring force constant?

2006-12-15 06:28:53 · 2 answers · asked by tanie 1

I dont understand why temperature goes down when u higher up the altitude . Are nt we getting nearer to the SUN .

2006-12-15 06:18:46 · 10 answers · asked by Anonymous

2006-12-15 06:15:16 · 1 answers · asked by cory c 1

The roof of the Sears Tower is at an elevation of 1451 ft (442.3 m), so, how fast would a person be travelling when he or she hit the concrete below? What would be the force of the impact? Would the impact (presuming at 150 lb male) break the concrete? I suck at physics so anybody willing to indulge me in the physics of this would be my new best friend. Thanks!

2006-12-15 06:15:15 · 3 answers · asked by ryguillian 2