Physics - April 2007

A force of 20 N is applied to a wire with an unstetched length of 2.5 cm. The wire gets 2.0 mm longer. The strain in the wire is??

please help, thanks

2007-04-01 05:15:57 · 2 answers · asked by Anonymous

A 10 kg ball weighs 98 N in air and weighs 65 N when submerged in water. The volume of the ball is??

please help, thanks

2007-04-01 05:14:47 · 3 answers · asked by Anonymous

A 10 kg ball weighs 98 N in air and weighs 75 N when submerged in water. The buoyant force of the water on the ball is??

please help, thanks

2007-04-01 05:13:57 · 1 answers · asked by Anonymous

2007-04-01 04:53:12 · 3 answers · asked by alone 2

When the warm air rises from the ground, the cold air nearby rushes in to fill its place. This rushing _______ of the air is what we call wind.
1. cause
2. strength
3. pressure
4. motion
5. speed

what is the smallest piece of a simple substance that still has the same qualities and can combine with other substances?
1. element
2. atom
3. minuteness
4. dot
5. molecule

A few weeks later I returned to the store, and the clerk failed to "deduct" the three dollars. "look on the computer" I told him. He walked over to it. Sure enough, the information was there. Taped to the moniter was a piece of scratch paper that said : We owe Mr. Hurst $3"
Closest meaning of "deduct"
1. discount
2. conduct
3. calculate
4. count down
5. pay


Hate stirs up truble, but love overlooks all _______.
1. delights
2. offences
3. fortunes
4. promises
5. hopes

2007-04-01 04:52:24 · 12 answers · asked by julie 1

Calculate the apparent weight of Paul, whose mass is 80kg, in a life that is..
a. At rest.
b. Accelerating upwards at 2.2ms-1
d. slowing upwards at 2.2ms-1
This one would be based on W=mg

2007-04-01 04:15:49 · 5 answers · asked by Scaryhunter 2

I am confused.

2007-04-01 03:57:21 · 6 answers · asked by deepak57 7

Looking at some pictures of atomic explosions, it seems that there is never any wind blowing. Do the authorities wait for a calm day or does the bomb create it's own weather pattern? Or does it take place so quickly that ther is no time for wind effect?

2007-04-01 03:29:59 · 9 answers · asked by bo nidle 4

a charged particle is moving with a constant velocity. on entering a uniform magnetic field the particle.

may increase in kinetic energy
must decrease in speed
may change its direction of motion
must change the magnitude of momentum

A magnetic force acts on a charge particle moving at a constant speed perpendicular to a uniform magnetic field.The magnitude of the magnetic force on this particle will increase if the

time of travel of the charge increase
speed of the charge decrease
magnitude of the charge decrease
flux density of magnetic field increase

2007-04-01 03:27:25 · 5 answers · asked by Anonymous

2007-04-01 02:48:11 · 1 answers · asked by Anonymous

2007-04-01 01:52:10 · 7 answers · asked by AleksandraK 1

A jar of tea is placed in sunlight until it reaches an equilibrium temperature of 32 degrees celcius. In an attempt to cool the liquid, which has a mass of 180g , 112g of ice at 0 degrees celcius is added. At the time at which the temperature of the tea is 15 degrees celcius, determine the mass of the remaining ice in the jar. Assume the specific heat capacity of the tea to be that of pure liquid water.

2007-04-01 01:48:28 · 3 answers · asked by Nightcrawler 1