Here is a model of the Earth-Sun system at a certain point in Earth's orbit around the Sun. Axis Rotation aris Arctic de Tropic of Cancer C Sunlight Equator Tropic of Capricom Antarcbic Card B Perpendicular to orbit According to the model, which two points on Earth are experiencing winter? ОА. А A A В. В C. D ODC​

Americium-241 undergoes fission to produce three neutrons per fission event. if a neutron-absorbing material is mixed in with this sample so that the rate of neutron production drops down to 1.8 neutrons per fission event, which will be effective at achieving a critical mass? check all that apply. remove a deflective shield surrounding the sample. remove absorbent material mixed in with the sample. compress the sample of americium-241.

Use the periodic table to complete this equation that represents nuclear fission processesun - ba c 3 n

1) a. water molecule breaks up into hydrogen and oxygen on passing electricity. does this involve breaking intermolecular or intramolecular forces of attraction. explain b. on boiling water changes to water vapor. does this involve breaking intermolecular or intramolecular forces of attraction. explain methanol evaporates faster than water. contrast the intermolecular forces and the vapor pressures of methanol and water?