Which statement is true according to modern atomic theory? Choose the correct answer. Cathode rays are composed of protons.
Atoms can never combine with any other atoms.
Atoms may be divided in ordinary chemical reactions.
Atoms of the same element may have different mass numbers.

35. a insulated cylinder of solid gold (k 310 kw/m-k) of radius v2 m and height 5 m is heated at one end until the temperature at each point in the cylinder is given by w(r, y, z) (30 z2)(2-(r2+ y2). determine the rate of heat flow across each horizontal disk given by z 1, z 2, and z 3, identifying which has the greatest rate of heat flow across it.

explanation:

at its highest point (point a) the pendulum is momentarily motionless.  all of the energy in the pendulum is gravitational potential energy and there is no kinetic energy.  at the lowest point (point d) the pendulum has its greatest speed.  all of the energy in the pendulum is kinetic energy and there is no gravitational potential energy.  however, the total energy is constant as a function of time.