When is a pendulum's kinetic energy equal to zero? 1/4 of the way through its swing
1/4 of the way through its swing

at the bottom of its swing
at the bottom of its swing

at the top of its swing
at the top of its swing

1/8 of the way through its swing

Why doesn't heat added to water make the tempature rise above 100c

Sally is making a model of a magnesium atom with an atomic mass number of 24 for her chemistry class. she has foam balls for the protons, neutrons, and electrons. she has added 6 neutrons to her model so far. how many more neutrons does she need to add to complete her neutral atom of magnesium?

Inside a flashbulb, oxygen surrounds a thin coil of magnesium. when the flashbulb is set off, a chemical reaction takes place in which magnesium combines with oxygen to form magnesium oxide. which of the chemical equations matches the reaction above? a. mg + o2 mgo2 + energy b. 2mg + o mg2o + energy c. 2mg + o2 2mgo + energy d. mg + o mgo + energy