They have a negative charge and rotate around the nucleus
Answer:
تكون دائمًا متعامدة مع سرعة الجسم وتكون دائمًا في اتجاه مركز انحناء المسار
Explanation:
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D because friction will slow it down going up hills (for safety reasons) and you go really fast going down.
D. Riding a bike uphill
Increased height = increased potential energy
