raul is pouring a concrete walk way in his backyard. he decides tp put a turn of 30 from the horizontal in the walkway to go around a tree and flower bed. once the walkway is past the tree, raul wants to continue the walkway in the same direction as before at what angle should he put the second turn so that the walkway will continue in the same direction as before it reaches the flower bed

The energy of a photon was found to be 3.38 × 10–19 j. planck’s constant is 6.63 × 10–34 j • s. which color of light corresponds to this photon?

Air conditioners not only cool air, but dry it as well. suppose that a room in a home measures 5.0m×9.0m×2.4m . if the outdoor temperature is 30 ∘c and the vapor pressure of water in the air is 85 % of the vapor pressure of water at this temperature, what mass of water must be removed from the air each time the volume of air in the room is cycled through the air conditioner? the vapor pressure for water at 30 ∘c is 31.8 torr.

Could we see a galaxy that is 20 billion light-years away?