1. The current radius of the Sun is approximately 696,000 km. What is the diameter? Write the formula used to calculate the diameter of a circle, and use it to solve the problem.
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Athermometer is placed in water in order to measure the water’s temperature. what would cause the liquid in the thermometer to rise?

Which best explains how a heat pump can heat a room? cold air from the house is moved through pipes, where it absorbs thermal energy. warm air from outside is pushed into the house to replace the cold air. combustion warms the air when chemical energy is transferred to thermal energy. fuel is used to move a piston, which pushes warm air into the house.

Which of the following particles always has a positive charge? a. electronb. neutron c. proton d. ion