Now build a model of salt. Place your materials on a sheet of paper. The regular-size marshmallows can represent the larger chlorine atoms, and the mini marshmallows can represent the smaller sodium atoms. Connect the marshmallows with toothpicks using the picture as a guide. What was difficult about building the model?

An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?

Two pans of a balance are 24.1 cm apart. the fulcrum of the balance has been shifted 1.33 cm away from the center by a dishonest shopkeeper. by what percentage is the true weight of the goods being marked up by the shopkeeper? assume the balance has negligible mass. answer in units of %.

How does a circuit breaker protect a refrigerator? a. when the current is too high, a metal strip in the fuse melts and opens the circuit. b. when the resistance is too high , a re-settable which opens a circuit c. when the current is too high , a re-settable switch opens the circuit d. when the resistance is too high a metal strip in the fuse melts and opens the circuit