Which of the following is an example of balanced forces? A.
A light bulb filament glows when a current moves through a wire.

B.
A person in a hot air balloon ignites the burner, which makes the balloon rise.

C.
A seesaw remains stationary when two students of equal weight sit on the ends.

D.
A driver slams on the car brake, and the car comes to a stop.

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?

If forces acting on an object are unbalanced. true or false

An electron is traveling with initial kinetic energy k in a uniform electric field. the electron comes to rest momentarily after traveling a distance d. (a) what is the magnitude of the electric field