Let σa, σb, σc, and σd be the respective surface charge densities on surfaces A, B, C, and D. Take all the charge densities to be positive for now.
A: or A I E 0 B: on C: Oc D: OD
If we assume that the metallic plates are perfect conductors, the electric field in their interiors must vanish. Given that the electric field E⃗ due to a charged sheet with surface charge +σ is given by E=σ2ϵ0, and that it points away from the plane of the sheet, how can the condition that the electric field in plate I vanishes be written? Choose a option below.
a) σa−σb−σc−σd=0
b) −σa+σb−σc−σd=0
c) −σa−σb+σc−σd=0
d) −σa−σb−σc+σd=0

The ballistic pendulum was invented in 1742 by english mathematician benjamin robins. it consists of an initially stationary pendulum that moves after being struck by a bullet, and it is used to measure the original velocity of the bullet. the known variables are the bullet's mass m, the pendulum's mass m, and the height to which the block and bullet swing, determined by the length of the pendulum l and final angle θ. two principles of physics are necessary to solve for the bullet's original velocity. what are these principles? conservation of momentum and newton's third law conservation of energy and conservation of angular momentum grade summary deductions 0% potential 100% conservation of momentum and newton's second law. newton's second law and conservation of angular momentum. conservation of energy and newton's third law conservation of momentum and conservation of angular momentum. conservation of momentum and conservation of energy conservation of energy and newton's second law.

Aphysical change is a change in the size, shape,, or stafe of matter true or false

Which of these statements is true? a. quarks pair with leptons to form protons and neutrons. b. quarks pair with bosons to form photons. c. quarks pair with photons to form protons and neutrons. d. quarks pair with other quarks to form protons and neutrons. e. quarks pair with electrons to form protons.