A dodgeball has a mass of 0.50 kg and hits a person in the leg with a velocity of 12 m/s. After hitting the person, it bounced back with a velocity of 5 m/s. Based on time-lapse video, it was determined
the ball was in contact with the person for 0.07 s. If the change impulse of the collision is 3.5 kg m/s
What is the force exerted when the dodgeball made contact with the person's leg.

An electron and a proton have the same kinetic energy upon entering a region of constant magnetic field and their velocity vectors are perpendicular to the magnetic field. suppose the magnetic field is strong enough to allow the particles to circle in the field. note: you'll need to look up the masses for an electron and proton. 1) what is the ratio of the radii of their circular paths rp/re?

Nitrogen (n2) undergoes an internally reversible process from 6 bar, 247°c during which pν1.2 = constant. the initial volume is 0.1 m3 and the work for the process is 121.14 kj. assuming ideal gas behavior, and neglecting kinetic and potential energy effects, determine heat transfer, in kj, and the entropy change, in kj/s. show the process on a t-s diagram.

Examine the drawing of a molecule. each ring represents an atom of nitrogen (n). what’s the chemical formula of this substance?