How much water at 14 ° C can be heated to 50 ° C by burning 30 g of alcohol? Specific heat of water 4200 J (kg- ° C), heat of combustion of alcohol 2.7 - 10(raised by 7 degrees) J/kg

f=ma newton

f=100x2.5=250n

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.

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