Physics - September 2006

I cant figure out this question on average speed.

I know average speed is d2-d1/t2-t1.

I have d2 being 1.5km and d1 being .8km
My times are .017hr and .012hr.

I keep getting 140 for my average speed which makes no sense cuz I had 85km/hr and 67km/hr to begin with.


The orginal question was an antelope can run 1.5km with an average speed of 85km/hr and then it ran .8km with an average speed of 67 km/hr.

Find the average speed during its whole run - I figured the time to be 1.74 min.

Anyways can you help me figure out why I'm getting 140km/hr for my average speed??

2006-09-17 04:32:41 · 7 answers · asked by MellyMel 4

i've just started college and on a whim i decided to add physics to my courses even though i hated it at g.c.s.e. level. i nly did it to become a full time student and get payed to go to college.

ive just read some of the questions in this section and i felt like i was reading alien!! can someone give me some simple physics facts and tips to help me pass this a-level??

2006-09-17 04:27:24 · 7 answers · asked by Anonymous

i have only 2 months to complete it. it should be mostly based on physics

2006-09-17 04:08:54 · 6 answers · asked by Oswin 1

is our planet going to be sucked in by a black hole?

2006-09-17 03:28:26 · 4 answers · asked by Anonymous

2006-09-17 03:24:08 · 5 answers · asked by Anonymous

A butcher is holding a string of chipolata sausages over a set of weighing scales, the lowest one being just above the scales.

A customer asks for all the sausages and the butcher says that he will let go of the top of the string, dropping the sausages into the scales, and he will only charge the customer for half of the highest reading on the scales (i.e. the weight shown by the scales will go up and up as more sausages fall in, and the butcher will charge for half of the maximum reading). The customer agrees.

Is the customer overpaying or underpaying, and by what percentage?

2006-09-17 03:17:51 · 15 answers · asked by THJE 3

Would the water freeze or the icecube melt? Asume a normal size glass and cube

2006-09-17 03:12:36 · 11 answers · asked by bwadsp 5

1. directly at the target
2. to the left of the target
3. diagonally from the target
4. to the right of the target
5. below the target
6. above the target

2006-09-17 02:56:03 · 11 answers · asked by xxlovexx 1

1. at the end point
2. at the beginning point
3. at the top
4. somewhere at the middle height

2006-09-17 02:54:34 · 12 answers · asked by xxlovexx 1

How does the vertical component of a projectile’s motion compare with the motion of vertical freefall when air resistance is negligible?

a) identical to that of free fall

b) greater than that of free fall

c) it cannot be determined

d) less than that of free fall?

2006-09-17 02:46:10 · 4 answers · asked by xxlovexx 1

Please, if you don't know, or are just giving some fanciful 5 word answer, just don't answer

2006-09-17 02:38:34 · 9 answers · asked by Anonymous

Feynman proposed a path integral formulation of quantum mechanics based upon the principle of least action.

His postulates were:
1. The probability for any fundamental event is given by the absolute square of a complex amplitude.
2. The amplitude for some event is given by adding together all the histories which include that event.
3. The amplitude a certain history contributes is proportional to
exp((i / hCross) * action of that history )

My question is this - How did Feynman come up with his third postulate. Did he derive it? If so, how?

2006-09-17 02:24:58 · 6 answers · asked by ? 3

2006-09-17 01:33:16 · 4 answers · asked by pal 1

2006-09-17 01:11:39 · 15 answers · asked by gary 2

2006-09-17 01:00:24 · 4 answers · asked by supercalofragilistic 3

2006-09-17 00:50:20 · 3 answers · asked by Anonymous

2006-09-17 00:44:39 · 13 answers · asked by ? 1

What explanation can you offer for the fact that practical space vehicles are lauched by multi stage rockets, fired in intervals along the trajectory, rather than by a single rocket ignited at the earth's surface?

Why is it incorrect to call g(=9.8ms^-2) ,which is acceleration due to free fall, to be "gravity"?

2006-09-17 00:09:35 · 5 answers · asked by Big bird 1

2006-09-16 23:56:33 · 5 answers · asked by Anonymous

"timetravel" f.e.to 1945 would mean:regrouping matter(atoms,strings...name it whatever you prefer)back as "it was" at that time.So in my opinion "time" is the RELATION of matter."Relation"as they exist in maths,no real things.So to me "the fourth dimension"(so thrilling in science fiction) does'nt really exist.Of course,in maths we can create fourth,fifth etc dimensions and work very well with them.I have always been frustrated with Einstein's(Onestone hihi)"Time is relative". Marcel says:"time is a relation".It may seem only a symantic problem but as for me it is a filosofical (or even more)one.

2006-09-16 23:05:45 · 8 answers · asked by Anonymous

2006-09-16 22:55:48 · 10 answers · asked by eswaran 1

How might antigravity be produced?
Willit be generated somehow?

2006-09-16 22:51:18 · 6 answers · asked by Anonymous

Could you please explain EXACTLY how that would happen, and

where I can get a video on this...!?!

2006-09-16 21:16:18 · 5 answers · asked by comedycatalyst 2

Benoulli's Principle science technology

2006-09-16 21:10:53 · 5 answers · asked by Prof. Hans 2

calculate the mole % of toluene and heptane that will have a refractive index of 1.474 assuming a linear relationship between the refractive indices of the two.

I need your help very badly. Any suggestions to formulas or at least guesses? I'll appreciate it. Thanks

2006-09-16 20:47:30 · 4 answers · asked by luzdary t 1

2006-09-16 19:24:32 · 3 answers · asked by vijay kumar98724 1

2006-09-16 19:23:35 · 10 answers · asked by dorkyporky903 1

it is on Air Pressure. when we want to clean an aquarium, the water has to be pumped out first , so what is the relationship between this condition with air pressure. Help me out!

2006-09-16 18:47:12 · 6 answers · asked by dyna@cute 1

2006-09-16 18:39:18 · 4 answers · asked by Anonymous

now we see while jet planes or rocket goes on sky... we see the white lines behind it. why it appears what was the reason for that

2006-09-16 18:22:15 · 16 answers · asked by Anonymous