Physics - October 2006

If a car is traveling with its headlights on, going at the speed of light, would you see the headlights?

2006-10-14 14:18:03 · 4 answers · asked by LG 1

2006-10-14 14:15:45 · 7 answers · asked by Anonymous

2006-10-14 13:44:50 · 2 answers · asked by stacy 1

A block of mass 8.00 kg is pushed up against a wall by a force P that makes a 50.0° angle with the horizontal. The coefficient of static friction between the block and the wall is 0.267. What are the possible values for the magnitude of P that allow the block to remain stationary.

2006-10-14 13:44:25 · 3 answers · asked by Jayu P 1

2006-10-14 13:39:43 · 5 answers · asked by gen 2

2006-10-14 13:37:11 · 5 answers · asked by gen 2

I have the answer but I just need to know the process:
You have a square parallel-plate capacitor of length 2L and seperation L/2. You have a dielectric slab of length L, width L, and thickness L/4. You can change the shape of the dielectric slab. However, the length must remain equal to the width, and the total volume must remain constant; you may only change the thickness. Show that if the thickness is h, then the capacitance is given by: C=[epsilon knot]L^2{4h^2/[L(k-1)+h] + L/2 - h }^-1. k is the dielectric constant kappa.

2006-10-14 13:23:00 · 2 answers · asked by thomthum2000 2

I know the length of the bowling alley to be 60 ft. But, if I use the velocity, time, and formulas given to me to find distance, the answer is not 60 ft. Why?

2006-10-14 13:01:55 · 7 answers · asked by Mnemosyne_21 1

As a roller coaster car crosses the top of a 50.0 -diameter loop-the-loop, its apparent weight is the same as its true weight. What is the car's speed at the top?

2006-10-14 12:51:43 · 2 answers · asked by Matt B 1

2006-10-14 12:39:46 · 13 answers · asked by mancyget 1

2006-10-14 12:34:17 · 6 answers · asked by allsphears 2

please help me, I need to know this for a research report, and I can't find the answer!

2006-10-14 12:32:46 · 8 answers · asked by Anonymous

For you to think about:

- Say you're in a space shuttle with twin babies. You want to be able to compare the heaviness of these two babies, but all you have is a spring balance. In space, the balance can't be used to measure the weight of anything because you feel as if youre weightless. How then, can you use the spring balance to compare?

- A rope has a 750N tension resistance force. You and friend pull on opposite ends, each with a force of 500N. Will the rope break? (No angle, you're pulling directly opposite from your friend) Why.

2006-10-14 12:29:31 · 3 answers · asked by Silver 2

The cart starts from a point A, which is stationary, and has a height of 24.5m. A while later the cart reaches a point B, which has a height 11.9m. Acceleration of gravity is 9.8m/s^2. What is the potential energy of the cart relatiove to the ground at point A (in units of J)? Also What is the speed of the cart at point B, ignore friction(in m/s)?

2006-10-14 12:09:59 · 3 answers · asked by Anonymous

2006-10-14 11:54:18 · 18 answers · asked by Steph :-) 3

A 2.18kg block is pressed against one of the ends of the block of the spring, which compresses the spring 0.101m. After it is released, the block moves 0.287m to the rightbefore it comes to a rest. Acceleration of gravity is 9.8m/s^s. What is the coefficient of kinetic friction between thesurface and the bloce?

2006-10-14 11:53:32 · 4 answers · asked by Anonymous

The coefficient of kinetic friction between the surface of the incline plane and the a 2 kg mass is equal to .7 kinetic friction for another mass connected mass of 3 kg the kinetic friction is .6 (These two masses are connected by a cable) If the two masses are to accelerate at 3.5 m/s^2, in the the upward direction at an angle of 35 degrees from horizontal.

What force is necessary to accomplish this acceleration up the incline plane? If the 2 kg mass starts at the bottom of the incline.

How far up the incline will the masses have moved in 4 seconds?

What will the velocity of the 3 kg mass at 4 seconds be? The cable does not stretch!!

2006-10-14 11:28:04 · 6 answers · asked by Shane W 1

2006-10-14 11:24:51 · 30 answers · asked by Anonymous

2006-10-14 11:24:32 · 13 answers · asked by David R 5

and please with no maths? it's late and i'm tired. But it's bugging me.

2006-10-14 11:08:28 · 17 answers · asked by wild_eep 6

2006-10-14 10:58:33 · 8 answers · asked by Anonymous

I remember reading about this somewhere and now can't find any information.
Does anyone know about a plan during World War II or even World War I to try to make ships "disappear" by using mirage technology. Basically, the enemy wouldn't be able to see a ship.

2006-10-14 10:06:26 · 5 answers · asked by JaneB 7

2006-10-14 09:49:18 · 5 answers · asked by Anonymous

physical change or chemical? EXPLAIN

2006-10-14 09:17:34 · 4 answers · asked by Princess_IN_Training 1

Need help with 2 physics problems.?
For number 3 i have found part a i just need part b.
3. A ski starts from rest and slides down a 26° incline 70 m long. Use energy methods.
(a) If the coefficient of friction is 0.09, what is the ski's speed at the base of the incline?
22.1 m/s
(b) If the snow is level at the foot of the incline and has the same coefficient of friction, how far will the ski travel along the level?
______ m

6. If you stand on a bathroom scale, the spring inside the scale compresses 0.50 mm, and it tells you your weight is 700 N. Now if you jump on the scale from a height of 0.80 m, what does the scale read at its peak?
__________ N

SHOW STEPS THAT ARRIVE TO THE ANSWER. This way i can understand what you've did and i can learn from it. Yes, i did post a previous question like this but the person who answered didn't say it clearly, plus the answer is wrong when i solve it his way.

2006-10-14 08:55:54 · 2 answers · asked by leon27607 3

Be specific and be carful i said optical properies not materialistic properties

2006-10-14 08:31:57 · 5 answers · asked by bleaw10 1

2006-10-14 07:48:51 · 5 answers · asked by sara2005_unique 1

2006-10-14 07:31:13 · 16 answers · asked by Thomas P 3

Relativity

2006-10-14 07:05:40 · 8 answers · asked by Anonymous

2006-10-14 07:03:51 · 7 answers · asked by STORMY K 3