A9 volt battery produces a current of 0.2a. what is the resistance?

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?

What distance does a car travel as its speed changes from 0 to 20 m/s in 17 s at constant acceleration?

What is the measure of how much matter is in an object and that can be measured using a balance? a. height b. volume c. weight d. mass