3. There is evidence that elephants communicate via infrared sound generating rumbling vocalizations as low as 14 Hz that travel up to 10 km. The intensity of these sounds can reach 103 dB at 5 meters from the source. Determine the intensity level in decibels at 10 km from the source.

If gases like carbon dioxide and methane make up less than 1% of the total atmosphere, why is it important for scientists to monitor changes in percentages of these gases?

Aman throws a football straight into the air. as it rises, it slows down. which type of energy is the football gaining?

The electric potential v is constant everywhere within a certain region of space. which statement below is true? the choices are: the electric field is also constant (but not zero) within the region. a charged particle placed within the region will experience an electric force. the electric field is zero everywhere within the region. the electric field varies from place to place within the region.