Two kids are on roller skates standing facing each other. They push off one another and travel in opposite directions. If the boy has a mass of 60 kg and is going 5.6 m/s, and the girl is going 7.1 m/s, what is the mass of the girl? kg

Which missing item would complete this alpha decay reaction ? > 228/88ra + 4/2he a.224/96 rn b. 232/90 th c. 230/92 u d. 235/92 u

Which type of reaction is shown in this energy diagram? energy products activation energy reactants time o a. endothermic, because energy is released to the surroundings o b. exothermic, because energy is absorbed from the surroundings o c. exothermic, because energy is released to the surroundings o d. endothermic, because energy is absorbed from the surroundings

Why does a collision with an airbag cause less damage than a collision with a steering wheel