1.Which of the following makes a body positively charged during charging byfriction? a. Loss of electrons
b. Gain of electrons
c. Loss of protons
d. Gain of protons​

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Explanation:

When two materials are rubbed together, the material with the greatest affinity for electrons is the material which takes electrons away from the other material. Saran wrap takes electrons from nylon and acquires the negative charge. In turn, the nylon loses electrons and becomes charged positively.

f=ma newton's second law 7x8=56n

b.a device that inputs heat into a cool object