The table shows the potential energy and kinetic energy of a skier at two different positions on a hill.

Position and Energy
Position (above ground) Kinetic Energy Potential Energy
100 meters 0 units 50,000 units
60 meters ? 30,000 units

What is the kinetic energy of the skier at a height of 60 meters above ground?
Group of answer choices

20,000 units, because total energy remains unchanged

80,000 units, because total energy remains unchanged

20,000 units, because total energy of the skier decreases

80,000 units, because total energy of the skier decreases

100mg magnesium reacts with 20ml of 1.0m hcl

Base your answer on the information below and on your knowledge of chemistry. nitrogen dioxide, no2, is a dark brown gas that is used to make nitric acid and to bleach flour. nitrogen dioxide has a boiling point of 294 k at 101.3 kpa. in a rigid cylinder with a movable piston, nitrogen dioxide can be in equilibrium with colorless dinitrogen tetroxide, n2o4. this equilibrium is represented by the equation below. 2no2(g) n2o4(g) + 58kj at standard pressure, compare the strength of intermolecular forces in no2(g) to the strength of intermolecular forces in n2(g).

The equation picture below shows which type of nuclear reaction u 235 + n x e 134 + sr 100 + 2n