Physics - November 2006

A solid rock suspended in air by a spring scale, has a measured mass of 9.00 kg. when the rock is submerged in water, the scale reads 3.30 kg. What is the sensity of the rock? (water density = 1000 kg/m^3

Answer 1.58X10^3 kg/m^3

2006-11-14 12:51:09 · 5 answers · asked by mastersource2005 5

What is it used for?

2006-11-14 12:41:26 · 5 answers · asked by Anonymous

Three ways in which the amount of electricity from an electric generator can be increased.

I can't find any information in my text = =

2006-11-14 12:34:28 · 4 answers · asked by kevin09132002 3

A jet of water squirts out horizontally from a hole near the bottom of the tank in Figure P9.45.

http://www.webassign.net/sf/p9_45.gif

2006-11-14 12:22:06 · 1 answers · asked by RunmanJr2 2

2006-11-14 12:08:54 · 8 answers · asked by trayconn 1

Energy required to remove an electron from a neutral atom is the atoms electron affinity or electron energy

2006-11-14 11:33:32 · 5 answers · asked by Ballerina 1

Which one should i pick?

when an electron is added to a neutral atom, energy is:

a. always absorbed
b. always released
c. either absorbed or released
d.neither absorbed or released

is it a or b, could u explain why

2006-11-14 11:09:30 · 3 answers · asked by Ballerina 1

if we have 150, four-hundred pound men, traveling 180 miles per hour in a bus, what will be the time it takes for this bus to go 400 miles if it stops for 2 minutes to pick up Orvil Redenbocker the popcorn guy???

2006-11-14 11:05:03 · 3 answers · asked by bigschwinger 2

when an electron is added to a neutral atom, energy is:

a. always absorbed
b. always released
c. either absorbed or released
d.neither absorbed or released

i pick a which one do u think is right?

2006-11-14 10:50:28 · 5 answers · asked by Ballerina 1

A. Rutherford model.
B. Avogadro model.
C. planetary model.
D. plum pudding model.

2006-11-14 10:47:00 · 7 answers · asked by Anonymous

what is the formula for density? u know like density = mass over volume or volume over mass?

2006-11-14 10:45:05 · 3 answers · asked by Bridget homiee 1

What is 1 gram equal to in pounds? Like 25 g is ? pounds.

2006-11-14 10:44:27 · 7 answers · asked by FOXRACING 3

A. a few particles bounced back, as if they'd hit something.
B. most of the particles bounced back, as if they'd hit something.
C. many of the particles were absorbed by the foil.
D. most of the particles' orbits changed markedly.
E. only a few particles went straight through the foil.

2006-11-14 10:41:34 · 2 answers · asked by Anonymous

A. Lavoisier
B. Dalton
C. Einstein
D. Mendeleyev
E. Boyle

2006-11-14 10:39:30 · 3 answers · asked by Anonymous

A. Anaxagoras
B. Eudoxus
C. Democritus
D. Pythagoras
E. Dalton

2006-11-14 10:36:49 · 9 answers · asked by Anonymous

A 10.0 kg crate is pulled up a rough incline with an initial speed of 1.5m/s. The pulling force is 100.0N parallel to the incline, which makes an angle of 15.0 degrees with the horizontal. Assuming the coefficient of kinetic friction is 0.40 and the crate is pulled a distance of 7.5 m, find the following:

a. the work done by the Earth's gravity on the crate
b. the work done by the force of friction on the crate
c. the work done by the puller on the crate
d. the change in kinetic energy of the crate
e. the speed of the crate after it is pulled 7.5 m

The answers for each one are (in order)
a. -1.9 X 10^2 J
b. -2.8 X 10^2 J
c. 7.5 X 10^2 J
d. 2.8 X 10^2 J
e. 7.6 m/s

if someone could show how to get these answers i would greatly appreciate it (again lol)

2006-11-14 10:20:08 · 1 answers · asked by strawberrylollipop12345 1

collision, the particles (which cannot be distinguished) are observed moving at angles of 41.7 and 48.3 degrees relative to the original direction of motion.
Find the final speed of each particle.

2006-11-14 10:03:37 · 2 answers · asked by Anonymous

Or "UV lights" appear purple!! Ultra violet light is invisible, isn't it?

2006-11-14 09:57:33 · 3 answers · asked by Link 4

The mass of a star like our Sun is 455000 Earth masses, and the mean distance from the center of this star to the center of a planet like our Earth is 7.03 x 10 to the 8th power km.

Treating this planet and star as particles with each mass concentrated at its respective geometric center how far from the center of the star is the center of mass of the planet-star system ? Answer in units of km.

2006-11-14 09:36:20 · 3 answers · asked by Anonymous

If I were to perform an experiment where I dropped a battery from a certain height and recorded how fast it went down, would the results change with I added more weight?

2006-11-14 09:35:38 · 4 answers · asked by Anonymous

2006-11-14 09:27:19 · 3 answers · asked by Anonymous

2006-11-14 09:19:33 · 4 answers · asked by Anonymous

2006-11-14 09:18:27 · 3 answers · asked by Philosophy Prof. 2

2006-11-14 09:10:30 · 11 answers · asked by zafrani 1

A 2.1 X 10^3 kg car starts from rest at the top of a driveway that is sloped at an angle of 20.0 degrees with the horizontal. An average friction force of 4.0 X 10^3 N impedes the car's motion so that the car's speed at the bottom of the driveway is 3.8 m/s. What is the length of the driveway?

I got 3.7 but the answer is 5.1 if someone could post how you do this problem i would really appreciate it.

2006-11-14 08:55:14 · 1 answers · asked by strawberrylollipop12345 1

A brick is thrown upwards from the top of a building at an angle of 18.9 degrees above the horizontal and with an initial speed of 21.2 m/s. (The acceleration due to gravity is 9.8 m/s^2). If the brick is in flight for 2.8 s, how tall is the building? (in meters)

2006-11-14 08:53:56 · 8 answers · asked by Anonymous

where the electrons are located in an atom???

2006-11-14 08:46:58 · 2 answers · asked by jouliette 1

A brick is thrown upwards from the top of a building at an angle of 18.9 degrees above the horizontal and with an initial speed of 21.2 m/s. (The acceleration due to gravity is 9.8 m/s^2). If the brick is in flight for 2.8 s, how tall is the building? (in meters)

2006-11-14 08:40:55 · 6 answers · asked by Anonymous

help

2006-11-14 08:40:15 · 1 answers · asked by james o 1

Does the ampere of electric current change throughout a simple circuit. Let say if i put the ammeter in different location of the circuit, would the amount of ampere change?

My inference: I dont think so because electric current is the same at all points since the electrons hat is leaving the battery contains the same flow of coulombs every second.

Am i correct, if not please explain

2006-11-14 08:36:19 · 4 answers · asked by Anonymous