Explain why both of the following statements are true. statement 1: the total kinetic and potential energy of an object is called mechanical energy . statement 2: the total kinetic and potential energy of the particles in an object is called thermal energy.

the answer is a and have a great day

some sources quote the lethal dose, for an average 170lbs opiate-naive individual is between 75 and 375 mg

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.