Suppose our sun is about to explode. in an effort to escape, we depart in a

spaceship at v = 0.80c and head toward the star tau ceti, 12 lightyears away.

when we reach the midpoint of our journey from the earth, we see our sun

explode and, unfortunately, at the same instant we see tau ceti explode as well.

a) in the spaceship’s frame of reference, should we conclude that the two

explosions occured simultaneously? if not, which occured first?

b) in a frame of refernece in ehich the sun and tauceti ar at rest, did they

explode simultaneously? if not, which exploded first?

The intensity of a polarized electromagnetic wave is 12 w/m^2. part a) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=0∘ with the plane of polarization? part b) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=30∘ with the plane of polarization? part c) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=45∘ with the plane of polarization? part d) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=60∘ with the plane of polarization? part e) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=90∘ with the plane of polarization?

Slab pull” is a type of tectonic plate movement that occurs due to the forces of mantle convection and results in the subduction of the lithosphere true or false

Matter that emits no light at any wavelength is called