Consider a sphere of radius r, surface area a and volume v. suppose you double the radius to 2r. how does the new surface area anew and the new volume vnew compare to the old values?

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?

Anybody wanna ? (picture included? )

Which lists the organs in the correct order as food passes from the mouth to anus?