Tell me the best book of biology of class 12th

Awave has a wavelength of 15 mm and a frequency of 6 hertz. what is its speed?

Which statement is a physical property? becomes moldy quicklyeasy to digestconducts electricity poorlydoes not burn

For the strategies below, decide whether they are best described as demand-side solutions or supply-side solutions to meeting human needs for fresh water. remember that a demand-side solution reduces demand for fresh water, whereas a supply-side solution increases the supply of fresh water. (a) damming a river to create a reservoir (b) desalinating seawater (c) a nation invading a neighboring country to access their rivers (d) raising water prices for consumers and businesses (e) providing tax breaks for companies that use less water (f) replacing inefficient irrigation with more-efficient drip irrigation to grow crops (g) requiring low-flow showerheads in all new homes