Chloe wanted to find out if the color of a food would affect how quickly kindergarten children would eat it for lunch. she believed that brightly colored food would be eaten more quickly because of the urgency of the color. she put food coloring into 4 identical serving bowls filled with mashed potatoes. a 5th identical bowl received only plain natural mashed potatoes. the colors were natural white, red, blue, green, and yellow. each child was given a scoop of potatoes. chloe did this experiment using 50 kindergarten students. 10 students were given each of the colors. she recorded the start and finish time of each student eating the potatoes and then calculated the difference in seconds. she did this over 5 days with each student getting each color. multiple data takers (chloe’s friends) made this experiment possible. what would be an appropriate hypothesis for this experiment? a brightly colored mashed potatoes will be eaten quicker than non brightly colored mashed potatoes. b if you feed students mashed potatoes, then they will be happy. c if the color of mashed potatoes is bright, then students will eat them faster than normally colored mashed potatoes. d if the type of mashed potatoes looks normal, then students will eat them

Greg drew a diagram to compare two of the fundamental forces. which labels belong in the areas marked x, y and z? gravitational force electromagnetic force x. attractive y repulsive z: infinite range x: infinite range y attractive z. repulsive x. always attractive y: infinite range z: attractive or repulsive x. attractive or repulsive y infinite range z: always attractive

An element becomes a positively charged ion when itloses protons.loses electrons.gains electrons.gains neutrons.

The inside surface of a cylindrical-shaped cave of inner diameter 1.0 m is continuously covered with a very thin layer of water. the cave is very long and it is open on both ends. the water on the cave surface is at a constant temperature of 15.5 °c. the cave is constantly exposed to wind such that 15.5 °c air flows through the cave at 4.5 m/s. the kinematic viscosity of the air is 14.66 x 10-6 m2/s and the molecular diffusion coefficient of water vapor in the air is 0.239 x 10-4 m2/s. because the cave diameter is so large, the flow of wind down the length of the cave, in the x direction, can be treated like it is external flow and the cave surface can be approximated as flat where appropriate. calculate the x value, in a) the transition to turbulent flow occurs at rex meters, where the air flow transitions from laminar to turbulent along the inside surface of the cave b) calculate the x value, in meters, where the bulk steady state concentration of water vapor in the air flowing in the cave is 10% of the saturation concentration. assume the air at the surface of the water layer is 100% saturated with water vapor. assume the wind entering the cave contained no moisture before it entered the cave. take into account the transition from laminar to turbulent flow when solving part b