During a lens lab, Jerome and Michael placed a 4.5-cm tall night light bulb a distance of
42.8 cm from a lens. The image of the light bulb was inverted and appeared 26.5 cm
from the lens
a. Determine the focal length of the lens being by Jerome and Michael.
b. Determine the expected height of the image of the bulb.

Identify the correct relation showing that the radius r of the orbit of a moon of a given planet can be determined from the radius r of the planet, the acceleration of gravity at the surface of the planet, and the time τ required by the moon to complete one full revolution about the planet. determine the acceleration of gravity at the surface of the planet jupiter knowing that r = 71 492 km and that t= 3.551 days and r= 670.9 × 10^3 km for its moon europa.