A student is demonstrating potential and kinetic energy using a pendulum. String
Bob (mass)
Which comparison can the student accurately make of the pendulum bob when it is at points 1 and 2?
its maximum potential energy is at points 1 and 2
B
Its maximum kinetic energy is at points 1 and 2
It has less potential energy at points 1 and 2 than it does at any other points in its swing
С
D
It has the same amount of kinetic energy at points 1 and 2 as it does at all other points in its swing.

i think it's c. i'm not sure but i think so.

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.

the answer is 0.8m.

by: nicholas