I would say because they have the same negative charge and they repel each other
You can throw all the objects in it and roll it around instead of holding the objects and they fall out of your hands/arms (if too much).
Answer:
36 N
Explanation:
Velocity of a standing wave in a stretched string is:
v = √(T/ρ),
where T is the tension and ρ is the mass per unit length.
300 m/s = √(T / 4×10⁻⁴ kg/m)
T = 36 N
