If a layer of sandstone lies on top of a layer of limestone in which a 300 million year old fossil is found and there are no nonconformist the layer of sandstone must be

·sound · parallel · mechanical · not a vacuum · needs a medium · compressions and rarefaction what type of wave is being described? a) compaction b) electromagnetic c) longitudinal d) transverse

If the wavelength is tripled, while the speed of the wave is held constant, what happens to the frequency? a. decreases to 1/3 b. decreases to 1/9 c. increases by 3 d. increases by 9 e. stays the same

Learning goal: to understand that the charge stored by capacitors represents energy; to be able to calculate the stored energy and its changes under different circumstances. an air-filled parallel-plate capacitor has plate area a and plate separation d. the capacitor is connected to a battery that creates a constant voltage v.