Physics - October 2007

time / position
0.0 / 5.0
5.0 / 10.0
10.0 / 40.0
15.0 / 40.0
20.0 / 0.0
A) how far did you travel
1)0-5s
2)5-10s
B) what is your average velocity at the previous time frames

2007-10-02 10:23:17 · 1 answers · asked by i love.. 1

Here is a physics problem I need to do, so if you could tell me the formula to use to solve it, that would be great.


"A 3250 kg aircraft takes 12.5 min to achieve its cruising altitude of 10.0 km and cruising speed of 850 km/h. If the plane's engines deliver, on average, 1500 hp during this time, what is the efficiency of the engines?"

2007-10-02 10:23:01 · 2 answers · asked by Coma White 5

How far does it move horizontally?
_m
How far does it move vertically?
_m

2007-10-02 10:21:42 · 1 answers · asked by Anonymous

Doesn't a wave need a medium to travel through?

2007-10-02 09:53:41 · 7 answers · asked by delsydebothom 4

how would you draw a displacement time graph, velocity time graph and an accelaration graph fo a bouncing ball?

2007-10-02 09:50:22 · 2 answers · asked by Anonymous

to make it clear I'm talking about a 4th spatial dimension, not time as the fourth dimension.

i was reading a book by Stephen hawking and came to a weird conclusion. if we have a cube and pass it through a 2 dimensional plane an observer in that 2 dimensional plane would just see a square. so by that logic a 4 dimensional object, lets say a hypercube, would just look like a cube to us. so could all of the objects around us just be 4 dimensional objects in our 3 dimensional universe.

2007-10-02 09:48:50 · 3 answers · asked by Anonymous

how does acceleration affect the Tension?

how do i use acceleration to find the tension of the rope?

2007-10-02 09:47:37 · 2 answers · asked by BLAZER-HM147 2

what would you see?

2007-10-02 09:34:06 · 4 answers · asked by Kara H 1

2007-10-02 09:30:10 · 1 answers · asked by icey27choco 1

2007-10-02 09:27:50 · 1 answers · asked by kana f 1

In the figure, a slab of mass m1 = 21 kg rests on a frictionless floor, and a block of mass m2 = 9 kg rests on top of the slab. Between block and slab, the coefficient of static friction is 0.30, and the coefficient of kinetic friction is 0.20. The block is pulled by a horizontal force of magnitude 58 N. What is the acceleration of the slab?

2007-10-02 09:26:34 · 1 answers · asked by Anonymous

how can i drop an egg from the top about 30 feet without it breaking, the only supplies allowed are 10 sheets of paper and 1 meter of tape. (the less of the supplies you can use the better.)

2007-10-02 09:17:55 · 7 answers · asked by lee 1

Two packing crates of masses m1 = 10.0 kg and m2 = 5.00 kg are connected by a light string that passes over a frictionless pulley as in Figure P4.26. The 5.00 kg crate lies on a smooth incline of angle 41.0°. Find the acceleration of the 5.00 kg crate.

could you detail how to do the problem....i don' want just the answer....thank you!!!!

2007-10-02 08:42:24 · 1 answers · asked by lttlstar7 1

I've just started searching for an 8" conflat gate valve for a vacuum deposition chamber (PVD sputtering with Ar process gas). I've realised that there are now Aluminum gate valves as well as Stainless valves that I'm used to. Can someone tell me which applications require which valve or what the consierations for use of either would be.
Many Thanks,
Steve

2007-10-02 08:24:08 · 1 answers · asked by Taoman 2

2007-10-02 08:18:10 · 3 answers · asked by JAMES 4

http://answerboard.cramster.com/physics-topic-5-108662-0.aspx

2007-10-02 08:10:53 · 2 answers · asked by Anonymous

2007-10-02 07:51:40 · 7 answers · asked by Jax Back 3

Maybe at the edge of the universe or something..........

2007-10-02 07:51:07 · 2 answers · asked by Anonymous

Just done an experiment on ldrs. for some reasont he ohmage is coming out higher under extreme light. maybe i am just confused but the equation to wort out resitance would be r = v/i would it not.

My results for two volts on a power pack are 0.02 a and 3.47 v under bright light. this gives a big ohm reading but surely it should be smaller. it just doesnt make sense to me so any help would be appreciated.
Any advice on ldrs and resistors in a context of how and the theory of why they resist would be awesome.

Many Many thanks

2007-10-02 07:47:25 · 2 answers · asked by master 2

(a) What is the resultant force exerted by the two cables supporting the traffic light in Figure P4.55? (answer in N and in which direction: dwnward,upward, leftward, rightward)


(b) What is the weight of the light? (answer in N)


Here is the image to it...

http://img.photobucket.com/albums/v372/smilytwinkle/trafficlight.jpg

2007-10-02 07:32:11 · 2 answers · asked by pinkepromise 2

2007-10-02 07:22:28 · 2 answers · asked by Anonymous

What is the approximate mass of a 1 litre carton of milk?

2007-10-02 07:14:37 · 4 answers · asked by Anonymous

2007-10-02 06:53:00 · 9 answers · asked by sensual1_60419 1

A block is projected up an inclined plane that makes and angle z to the horizontal. it returns to its intial postion with half its initial spped. what is the coeff of friction between the block and the plane in terms of the angle of incline?(hint: do any forces acting on the block change direction during its travels?)

this is what i got:
SUM OF Fx=Nx+wx+(Fk)x
= -mgsinz-Fk
=MAx
sum of fY=Ny+Wy+(Fk)y
= n-mgcos z
=MAy=0
max=-mgsinz-(miuk)(mgcosz)
miuk=(-Ax-sinzcosz)/gcosz
=(2ax-sin2z)/2gcosz

2007-10-02 06:40:30 · 1 answers · asked by berry 1

2007-10-02 06:37:41 · 5 answers · asked by -Xx-green-xX- 1

The initial velocity of a 1.90 kg block sliding down a frictionless inclined plane is found to be 1.10 m/s. Then 1.81 s later, it has a velocity of 7.13 m/s. What is the angle of the plane, with respect to the horizontal?

2007-10-02 06:36:08 · 3 answers · asked by jULIAN C 2

Add examples.

2007-10-02 06:35:11 · 4 answers · asked by Anonymous

given a maximum voltage of 3.9491 volts and a minimum voltage of -0.0256 volts then what is half the max voltage value??

THESE ARE ON THE GRAPH AND THEN IT SAYS:
t0 = 1.241 sec
t1= 1.290 sec
t2 = 1.265 sec

THEN IT SAYS: Q7 shows on offest in the "zero" point. You must add the half quantity to the offset to find the scale's value for 1/2Max.

please help and explain thanks

2007-10-02 06:05:26 · 1 answers · asked by Anonymous

A solid sphere, a hollow sphere and a disc, all having same mass and radius, are placed at the top of a smooth incline and released. How do we prove that all will take same time in reaching the bottom

2007-10-02 05:35:59 · 5 answers · asked by sameerteacher01 1

When the water reaches the bottom of the falls, its speed is 25.9 m/s. Neglecting air resistance, what is the speed of the water at the top of the falls?

2007-10-02 05:32:13 · 3 answers · asked by Anonymous