ba điện tích điểm bằng nhau q1=q2=q3=10^-7 được đặt taj ba đỉnh của 1 tam giác đều cạnh a=4cm trong không khí.lực tĩnh điện có đôn lớn xấp xỉ bằng

The ballistic pendulum was invented in 1742 by english mathematician benjamin robins. it consists of an initially stationary pendulum that moves after being struck by a bullet, and it is used to measure the original velocity of the bullet. the known variables are the bullet's mass m, the pendulum's mass m, and the height to which the block and bullet swing, determined by the length of the pendulum l and final angle θ. two principles of physics are necessary to solve for the bullet's original velocity. what are these principles? conservation of momentum and newton's third law conservation of energy and conservation of angular momentum grade summary deductions 0% potential 100% conservation of momentum and newton's second law. newton's second law and conservation of angular momentum. conservation of energy and newton's third law conservation of momentum and conservation of angular momentum. conservation of momentum and conservation of energy conservation of energy and newton's second law.

According to newton’s first law of motion, which force is expected to cause a body to accelerate?

Work out sian speed for the first 30 minutes of her journey. give your answer in km/h.