Can someone tell me the answer, i can't find the answer xd

What is the internal energy of 4.00 mol of diatomic nitrogen gas n2 at 455k

When the force acting on an object points at least partially in the direction of the motion the work done is considered to be negative

At a certain instant after jumping from the airplane a, a skydiver b is in the position shown and has reached a terminal (constant) speed vb = 52 m/s. the airplane has the same constant speed va = 52 m/s, and after a period of level flight is just beginning to follow the circular path shown of radius ρa = 2330 m. (a) determine the velocity and acceleration of the airplane relative to the skydiver. (b) determine the time rate of change of the speed vr of the airplane and the radius of curvature ρr of its path, both as observed by the nonrotating skydiver.