Which statements are part of the safety protocol for this lab experiment? Check all that apply. Always wear safety goggles when performing an experiment.
Use caution when dropping objects and/or launching them into the air.
Use thermal gloves when handling the soda bottle and beanbag.
Use only the materials that your teacher provides or approves.
Check the soda bottle and its cap for cracks and chips prior to use.
Use only carbonated liquids in the soda bottle.
Report all accidents—no matter how big or small—to your teacher.

while cooking a piece of 1/2 pound beef steak, a cast iron pan (2.4kg in weight) was heated 260 celsius.

(newtons first law)

conservation of momentum law states :

momentum before collision = momentum after collision

momentum p (kg-m/s)= mass * velocity

say moving car=1 000 kg, velocity = 10 m/s then p = 1 000*10= 10 000 kg-m/s

say still car = 2 000 kg, velocity = 0 m/s then p = 2 000* 0 = 0 kg-m/s

total momentum prior to collision = 10 000 + 0 = 10 000 kg-m/s

momentum after collision = 10 000 kg-m/s

mass now = 1 000 kg+2 000 kg = 3 000 kg

10 000 = 3 000 kg* velocity m/s

10 000/3 000 = velocity

3.33 m/s = velocity after collision

an impulse is a force applied over time , momentum is exclusive of external forces and a perfect collision is implied