Which statement describes ionic compounds? A) ionic compounds are positively charged
B) ionic compounds are neutral
C) ionic compounds are negatively charged

Avoltaic cell converts chemical energy to

Awater balloon launcher uses an elastic band with a spring constant of 115 n/m to use thee launcher you stretch thee band back with a balloon n it the water balloons have a mass of 1.3 kg a) if you stretch the band by 0.8 m, what elastic force will the band exert? b) with the band stretched 0.8 m, how much elastic potential energy is stored in the spring? c) if you release the band, it pushes forward. what is the kinetic energy of the balloon when it reaches the natural length of the band? d) what is the speed of the balloon when it reaches the natural length of the band?

Acar travels in reverse. it covers 150 meters in 12 seconds what is the velocity of the car what is the speed of the car