Physics - February 2007

specially problems in physics

2007-02-07 02:21:24 · 6 answers · asked by Anonymous

a- angle of relection equal of refraction
b- angle of incident equal of refraction
c- angle of incident equal of reflection
d- angle of incident equal of rarefraction

2007-02-07 01:57:47 · 4 answers · asked by Bailey B 1

just a question i was asked im not a conspiracy nut i'd like to know a professional opinion that isn't hidden behind debunking theories and all that "seperate argument"

2007-02-07 01:39:37 · 6 answers · asked by Red5 5

a- both have the same diameter
b- the wide-angle lens has the smaller diameter
c- the wide- angle lens has the larger diameter
d-any of the above, depending on the ratio of the focal lengths of the lenses

2007-02-07 01:37:41 · 2 answers · asked by Jac A 1

a- speed
b- amplitude
c- acceleration
d- frequency

2007-02-07 01:35:40 · 3 answers · asked by Jac A 1

Is it possible for an object that is travelling at constant speed to be accelerating? If yes, give an example. Anyone can explain this to me? Thanks.

2007-02-07 01:29:09 · 10 answers · asked by FSC 2

a- always real
b- always virtual
c- sometimes real and sometime virtual
d- neither real nor virtual

2007-02-07 01:10:18 · 3 answers · asked by Tami B 1

a- the image is virtual, erect, and larger than the object
b- the image is real, inverted, and larger than the object
c- the image is real, inverted, and the same size as the object
d- no image is formed

2007-02-07 01:07:53 · 1 answers · asked by Tami B 1

Stress
Strain and
Elasticity
[physics]

2007-02-07 00:29:10 · 4 answers · asked by senti 1

2007-02-07 00:14:38 · 3 answers · asked by Anonymous

a) objects would be located somewhere different from where they appear

b) we would never receive sunlight

c) we would not be able to see at all

d) life on earth would not be possible

e) car headlights would still work

2007-02-07 00:13:48 · 10 answers · asked by Anonymous

Ocassionally your reflection from a glass window will have two images slightly separated from each other. This is bc__

a. the light is refracted

b. colors interfere

c. the window is of poor quality

d. both the front and back surface of glass reflect

e. no light can pass through the glass

2007-02-06 23:50:45 · 11 answers · asked by Anonymous

2007-02-06 23:49:30 · 4 answers · asked by paritosh k 1

2007-02-06 23:43:30 · 7 answers · asked by dizzyandconfused 2

2007-02-06 23:08:18 · 1 answers · asked by Anonymous

1. does knowledge of newton's law of motion help save lives?
( example)
2. Examples of situations where the knwledge of these concept will be invaluable.

2007-02-06 23:02:39 · 4 answers · asked by starbrightlight 1

Two cylindrical vessels of equal crosssectional area 'A' contain water upto heights 'H1' and 'H2'. The vessels are interconnected so that the levels in them become equal. Calculate th work done by the force of gravity during the process. The density of water is P

2007-02-06 22:58:16 · 1 answers · asked by Anonymous

I'm talking about the states of matter. I'm looking to exclude gaseous stuff, plasma etc. I guess I could call it liquo-solids, or something :P

2007-02-06 22:19:42 · 7 answers · asked by tunheim 1

Two crickets, Chirpy and Milada, jump from the top of a vertical cliff. Chirpy jumps horizontally and reaches the ground in a time of 2.70 s . Milada jumps with an initial velocity of 81.0 cm/s at an angle of 40.0 degrees above the horizontal.

How far from the base of the cliff will Milada hit the ground?
Take the free fall acceleration to be g = 9.80 m/s^2 .


__________cm

thank you in advance :D

2007-02-06 21:52:22 · 6 answers · asked by Anonymous

A tennis ball rolls off the edge of a tabletop of height 0.810 m above the floor and strikes the floor at a point a horizontal distance 1.70 m from the edge of the table. You can ignore air resistance.

Time of flight is: 0.407 s

Magnitude of initial velocity is: 4.18 m/s

Find the magnitude of the velocity of the ball just before it strikes the floor.
Take the free fall acceleration to be g = 9.80 m/s^2 .



Find the direction of the velocity of the ball just before it strikes the floor.
Express your answer as an angle measured from below the horizontal.

2007-02-06 21:50:23 · 6 answers · asked by Anonymous

Let's clear some things up first:

1) Scientific records of average global temperature only started in 1880.

2) The 'little ice age' started about 550 years ago and ended in the mid nineteenth century (hence the world started to naturally warm up at the same time as temperature records were beginning to be taken) - i.e. the world was colder than normal at the beginning of the readings.

3) In 1883 Krakatoa errupted, spewing tonnes of soot into the atmosphere and blocking out the sunlight for a substantial time, such that the average global temperature dropped by up to 5 degrees centigrade. The atmosphere was only clear enough to begin increasing the average global temperature again in the mid twentieth century.

Just these three facts can clearly show how the world is warming up back to its NORMAL AVERAGE TEMPERATURE and, consequently, isn't the result of our carbon dioxide usage. In fact, the amount of carbon dioxide we release is tiny compared to what is naturally released

2007-02-06 21:48:21 · 8 answers · asked by Mawkish 4

i think its the laymen words of heisenberg's uncertainity principle. am i right?

2007-02-06 21:33:09 · 7 answers · asked by pelican watcher 2

what is the law of conservation of momentum?????? please help me...if possible long answers/...thanks

2007-02-06 21:26:06 · 3 answers · asked by antoinekingx 1

2007-02-06 21:14:46 · 3 answers · asked by thanin_ong 2

what are the 2 types of collision? define each

2007-02-06 21:03:24 · 7 answers · asked by antoinekingx 1

what is the law of conservation?? please help me...if possible long answers/...thanks

2007-02-06 21:03:22 · 3 answers · asked by antoinekingx 1

please solve this using the law of conservation of momentum...



a 0.02 kg ball moving to the right at 0.25m/s makes an elastic head on collission with a 0.04kg ball moving to the left at 0.15m/s after the collission, the smaller ball moves to the left at 0.16m/s. what is the velocity of the 0.04kg ball after collission?


please with solution...use the law of conservation of momentum...thanks

2007-02-06 20:56:04 · 2 answers · asked by antoinekingx 1

2007-02-06 20:47:27 · 1 answers · asked by Lai Yu Zeng 4

2007-02-06 20:44:08 · 3 answers · asked by Lai Yu Zeng 4

2007-02-06 20:30:08 · 13 answers · asked by shivkumar G 1