Ryan, a social worker, has observed that the foster care in his region is functioning inefficiently. He wants to undertake some programs to develop the functioning of the foster care. Whom should he approach at the Administration for Children and Families?
A. Assistant Secretary

B. Principal Deputy Assistant Secretary

C. Chief Medical Officer

D. Regional Administrator

The energy released by a chemical reaction can be measured using a calorimeter. when barium hydroxide octahydrate crystals are reacted with dry ammonium chloride inside of a coffee cup calorimeter, the temperature of the 18.00 g of water in the calorimeter decreases from 30.0°c to 8.0°c. the equation for calculating energy absorbed or released by a reaction is: where q is the energy released or absorbed, m is the mass of water in the calorimeter, cp is the specific heat of water, and δt is the observed temperature change. if the specific heat of liquid water is 4.19 j/g·°c, how much energy was absorbed by the reaction?

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

What sort of waves exhibit the doppler effect?