An orange is placed on a table in a completely dark room, without any source of light. which of the following choices correctly describes what an observer will see as he looks in the direction of the orange?
a) the orange will not be seen at all because light is not bouncing off its surface.
b) the orange will be seen by the observer immediately, but it will be very dim.
c) the orange will only be seen after the observer’s eyes adjust to the darkness.
d) the orange will be seen by the observer immediately, but it will be very dim. the orange will become brighter as the observer’s eyes adjust to the darkness.

After the near spacecraft passed mathilde, on several occasions rocket propellant was expelled to adjust the spacecraft's momentum in order to follow a path that would approach the asteroid eros, the final destination for the mission. after getting close to eros, further small adjustments made the momentum just right to give a circular orbit of radius 45 km (45 × 10^3 m) around the asteroid. so much propellant had been used that the final mass of the spacecraft while in circular orbit around eros was only 545 kg. the spacecraft took 1.04 days to make one complete circular orbit around eros. calculate what the mass of eros must be.

Light that is polarized along the vertical direction is incident on a sheet of polarizing material. only 96% of the intensity of the light passes through the sheet and strikes a second sheet of polarizing material. no light passes through the second sheet. what angle does the transmission axis of the second sheet make with the vertical?

Which of the following statement is false ? a.batteries should never be stored on metal trays or outside in the elements)b, battery acid cannot be neutralized)c.do not stack batteries on top of each other)d.never put a damaged battery in a dumpster. i