It could be said that apparent retrograde motion of planets was the straw that broke the geocentric model's back. select all of the following statements that are accurate it would have completely impossible to extend the ptolemaic model to accurately predict apparent retrograde motion. earth exhibits apparent retrograde motion as seen from mars. a heliocentric model easily reproduces appaernt retrograde motion as an inevitable consequence of the orbits of the planets, including earth. mercury exhibits apparent retrograde motion frequently because it is close to the sun and orbiting witha very short orbital period. all the planets exhibit apparent retrograde motion. mars, jupiter, and saturn are the only planets that exhibit apparent retrograde motion. even with very complex epicycles and off-center orbits, accurate predictions of the timing, location and duration of apparent retrograde motion events could not be made using geocentric models.

we're given that v₀ = 0 and a = 5.4 m/s². therefore, since v = at + v₀ for constant acceleration the equation for velocity is

after 28s,

m/s

which i would round to 150 m/s as my final answer

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia

54 degrees incident angle = reflected angle

angle is from normal turned to line of ray