What is the block of 10 columns in the middle of the table called?
A. Representative metals
B. Transition metals

What do butterflies have on their feet which allows them to sense different strengths and types of nectar? a.mechanoreceptors b.acoustic receptors c.substratum receptors d.chemoreceptors

Your target variable is δf, the magnitude of the difference in frequency between the waves emitted from the sonar device and the waves received by the device after reflecting off the whale. write an expression for δf in terms of the relevant frequencies using the subscript notation introduced above.

Which of the following are considered noble gases? a. bromine b. neon c. argon d. chlorine