Honey bees beat their wings, making a buzzing sound at a frequency of 2.3 × 102 hertz. what is the period of a bee's wing beat?

The density of a substance is 4.0 g/cm3. if a sample of the substance has a volume of 25 cm3 then what is the mass

Which of the following situations is impossible? a) an object has velocity directed east and acceleration directed east. b) an object has zero velocity but non-zero acceleration. c) an object has constant non-zero velocity and changing acceleration. d) an object has velocity directed east and acceleration directed west. e) an object has constant non-zero acceleration and changing velocity.

Scientific models are based on current knowledge, which can limit their effectiveness when new discoveries are made.