Wonder Woman is skateboarding at -10 m/s in 1ºC air at time 8 o'clock. The combined mass of Wonder Woman and the skateboard is 100 kg. Ester tosses a pumpkin of mass 10 kg to Wonder Woman, and when she catches it, she and the skateboard begin to roll with a speed of 15 m/s. What was the speed of the pumpkin?

specific latent heat of fusion, lf, of a substance is defined as the amount of heat required to change a unit mass of the substance from solid to liquid state, without any change in the temperature.

explanation:

when insulating materials rub against each other, they may become electrically charged . electrons , which are negatively charged, may be 'rubbed off' one material and on to the other. the material that gains electrons becomes negatively charged. the material that loses electrons is left with a positive charge.

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