How does the air in a bicycle tyre cause pressure?

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?

The respiratory system removes oxygen and water from the body. select the best answer from the choices provided t f

What is the momentum of a 2 kg object moving at 15 meters per second