Questions: As the boy rubbed against the slide, some electrons transferred from his body to the slide. This left the boy with a net charge. - Now all of the boy's hairs have charges, so they each other.

As the boy rubbed against the slide, some electrons transferred from his body to the slide. This left the boy with a net charge.
- Now all of the boy's hairs have charges, so they each other.

Transcript text: - As the boy rubbed against the slide, some electrons transferred from his body to the slide. This left the boy with a $\square$ net charge. - Now all of the boy's hairs have $\square$ charges, so they $\square$ each other.

Solution

Solution Steps

Step 1: Understanding Charge Transfer

When the boy rubs against the slide, electrons are transferred from his body to the slide. Electrons carry a negative charge, so when they leave the boy's body, he loses negative charge.

Step 2: Determining the Boy's Net Charge

Since the boy loses electrons, he is left with a net positive charge. This is because the loss of negative charge (electrons) results in an excess of positive charge.

Step 3: Analyzing the Charge on the Boy's Hairs

All of the boy's hairs now have the same positive charge. Like charges repel each other due to electrostatic forces.

Final Answer

As the boy rubbed against the slide, some electrons transferred from his body to the slide. This left the boy with a $\boxed{\text{positive}}$ net charge.
Now all of the boy's hairs have $\boxed{\text{positive}}$ charges, so they $\boxed{\text{repel}}$ each other.

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