Physics Quiz

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A girl holds a rubber ball out of a window of a tall building. The mass of the ball is 0.20kg. The ball is at rest 10m above a concrete path. (a) Calculate the gravitational potential energy of the ball relative to the concrete path. Use 9.8 for gravity and round to two sig figs.

• 20 J

• 9.8 J

• 26 J

• 15 J

Identify the main method by which thermal energy is transferred throughout the water.

• Radiation
• Convection
• Conduction
• Evaporation

Choose from below, two methods of generating electrical power for which the main source of energy is not the Sun.

• Fossil fuels

• Geothermal

• Tidal

• Wind