Problem 1 an electromagnetic wave propagates in the +ˆz direction. what can be concluded about the direction of the electric field forming the wave?

select one of the following:
(a) there is no general relation between the direction of the electric component and the direction of propagation.
(b) the electric component must point in the ±zˆ direction.
(c) the electric component must oscillate in the x − y plane.
(d) the electric component must oscillate in the y − z plane.

Determine el momento angular de un rueda de 3000g moviendose a 10m/s con un radio de giro de 400cm

What is a carrier wave and how does it affect what you hear on the radio

The base of a 50-meter tower is at the origin; the base of a 50-meter tree is at (0, 50, 0). the ground is flat and the z-axis points upward. the following parametric equations describe the motion of six projectiles each launched at time t = 0 in seconds. (i) r (t) = (50 + t2)k (ii) r (t) = 2t2 j + 2t2k (iii) r (t) = 50 i + 50 j + (50 − t2)k (iv) r (t) = 2t j + (50 − t2)k (v) r (t) = (50 − 2t) i + 2t j + (50 − t)k (vi) r (t) = t i + t j + tk (a) which projectile is launched from the top of the tower and goes downward? at time t = , the projectile hits the ground at point (x, y, z) = . (b) which projectile hits the top of the tree?