Hạt mang điện giống nhau có cùng khối lượng m= 3.10⁻²⁷kg, điện tích q=5.10⁻¹⁰C,đặt trong nước nguyên chất (ε = 1 ). Lực đẩy cu-lông lớn hơn lực hấp dẫn bao nhiêu lần? Biết rằng hằng số hấp dẫn là G=6,67.10⁻¹¹

he made 11 calls in one day

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards

false

explanation: