When doing a chin-up, a physics student lifts her 42.0 kg body a distance of 0.25 m in 2 seconds. What is the power delivered by the student's biceps? (you must SHOW ALL WORK for your math calculations) .

What tightening torque should be used for a hexagonal head screw (not split-bolt) on a 250 kcmil conductor?

Two objects of different mass start from rest, are pulled by the same magnitude net force, and are moved through the same distance. the work done on object 1 is 900 j. after the force has pulled each object, object 1 moves twice as fast as object 2. how much work is done on object 2?

The magnitude of the magnetic field at a certain distance from a long, straight conductor is represented by b. what is the magnitude of the magnetic field at twice the distance from the conductor? a. at twice the distance, the magnitude of the field is 4b.b. at twice the distance, the magnitude of the field is 2b.c. at twice the distance, the magnitude of the field is b/2.d. at twice the distance, the magnitude of the field is b/4.e. at twice the distance, the magnitude of the field remains equal to b.