Who proposed the idea that electrons are found in different energy levels around the nucleus

If a robot fixed another robot is it a engineer or doctor?

Suggest why placing wheels under a heavy box reduces the neccessary force required to push it along at a constant speed.

The table shows dates and appearance of index fossils. which rock layers can be dated most precisely? a) a layer containing both a fossil 4 and a fossil 3 b) a layer containing both a fossil 2 and a fossil 3 c) a layer containing both a fossil 1 and a fossil 4 d) a layer containing both a fossil 1 and a fossil 2