If you send your boss an email, she might not have her inbox sorted properly.
Therefore, she might not receive your email or reply to it.
If you ask your boss about said email, she will probably look at you confusedly and ask what you are talking about.
When you read the email to her, she’ll probably interrupt you and ask about something wholly unrelated.
When you ask her to stay on task, she’ll complain about making her work and continue to avoid the issue at hand.
After ten minutes, you’ll grow frustrated and walk away in an attempt to resolve the issue yourself. She’ll ask where you’re going and if you can get her lunch while you’re there.
You’ll end up getting her lunch, and when you get back with her “salad of healthy stuff”, she’ll ask why the project you emailed her about isn’t done.
When you remind her that you are waiting on her response, she’ll make a phone call to someone.
Then you’ll realize she didn’t call the person who can answer the question, but instead called her sister to chat about the weekend.
By 5:00, you are ready to go home and pack up to leave. On your way out, your boss finds your email and yells out that she’s going to respond.
You pretend you didn’t hear her and continue on your way. After all, you have been waiting for her to read that email since 10:00 AM.
She’ll then email a nonsensical response and copy the client because you weren’t in the office at that exact moment to remind her about the original email that contained the (still) remaining questions.
On Monday, she’ll ask why you didn’t just email her the questions to begin with…
That, my friends, is what happens if you send your boss an email.