Q1. At the point of fission, a nucleus with 98 protons is divided into two smaller spheres, each with 49 protons and a radius of 7.4 10-15 m. What is the repulsive force pushing these two spheres apart?
Q2. On an airplane's takeoff, the combined action of the air around the engines and wings of an airplane exerts an 8020-N force on the plane, focussed upward at the angle of 55.0° above the horizontal. The plane rises with constant velocity in the vertical direction while continuing to accelerate in the horizontal direction.
What is the weight of plane?