Asphere 5 cm in diameter has a small scratch on its surface. when the scratch is viewed through the glass from a position directly opposite, where does the scratch appear and what is its magnification? assume n = 1.5 for the glass.

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?

The energy released by a nuclear fusion reaction is produced when

Awave has a wavelength of 7 mm and a frequency of 19 hertz. what is its speed?