More density graphi questions
1. a student measured the masses of some aluminum and copper cylinders of different volumes. the informa
below.
aluminum
copper
sinasse
4.38
31.71
4.21
31.54
5.07
33.58
4.63
34.81
5.75
35.44
5.00
38.07
6.08
36.28
6.07
47.20
6.38
37.12
6.68
52.23
7.38
58.12
8.17
64.57
9.30
73.56
a) graph this data on one graph.
b) calculate the density of each metal using the graph.
c) which sample is more dense?

The dipole moment of the water molecule (h2o) is 6.17x10^-30 c.m. consider a water molecule located at the origin whose dipole moment p points in the +x-direction. a chlorine ion ( of charge-1.60x10^-19c , is located at x=3.00x10^-9m . assume that is much larger than the separation d between the charges in the dipole, so that the approximate expression for the electric field along the dipole axis can be used. a) find the magnitude of the electric force that the water molecule exerts on the chlorine ion. b) what is the direction of the electric force. -x-direction or +x-direction c) is this force attractive or repulsive?