No, but they are water-resistant. Don’t get confused between these two; waterproof means water is literally incapable of passing through an object, whereas water-resistant means it’s harder for water to pass through an object but not impossible.

In many countries, yes. In the UK, you are permitted to ride an electric bike provided you are at least 14 years of age, although no driving license is required. There are certain restrictions, though; the motor must have a maximum power output of 250 watts and should not be able to propel the bike when it’s traveling more than 15.5 mph.

They can be and are certainly heavier than a ‘normal’ bike. A non-electric bike normally weighs somewhere between 30 and 35 pounds, whereas an electric version of a similar model may be about 45 to 50 pounds. The addition of a motor system adds a hefty chunk to the e-bike’s weight, as does the typically bigger frame of the electric bike. But unless you have to lift it then you might not even notice.

Yes; in fact they’re probably easier to ride than normal bikes despite their heavier weight. The purpose of its electric motor and battery is to reduce the amount of effort you, the cyclist, need to put in, and so making your cycling less strenuous as a result.