What is the speed of a bobsled whose distance-time graph indicates that it traveled 121m in 30s?

An architect plans to use solar energy to heat the next house he designs. what principle of absorption and infrared energy can be applied to the design of the new house? how could she apply to those principals?

The voltage applied across a given parallel-plate capacitor is doubled. how is the energy stored in the capacitor affected?

Humidity is to blame for that muggy, steamy feeling you experience on some hot summer days. what gas in the atmosphere causes humidity? a) oxygen b) hydrogen c) nitrogen d) water vapor