You’re an electrical engineer designing an alternator (the generator that charges a car’s battery). mechanical engineers specify a 10-cm-diameter rotating coil, and you determine that you can fit 250 turns in this coil. to charge a 12-v battery, you need a peak output of 14 v when the alternator is rotating at 1200 rpm. what do you specify for the alternator’s magnetic field?

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?

Which subatomic particle has a negative charge

Which component of the earth’s atmosphere is decreased due to photosynthesis?