Briefly describe the three kinds of defense in our immune system

Acylindrical specimen of a nickel alloy having an elastic modulus of 207 gpa (30 × 106psi) and an original diameter of 10.2 mm (0.40 in.) experiences only elastic deformation when a tensile load of 8900 n (2000 lbf) is applied. compute the maximum length of the specimen before deformation if the maximum allowable elongation is 0.25 mm (0.010 in.)

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?

Amagnetic field applies forces on: a)static chargesb)moving chargesc)water flow