Mark has brown hair. his wife, maggie, also has brown hair. mark and maggie have four children. three children have brown hair, and one child has blonde hair. what is the most likely explanation for this? a. repeated dying of the fourth child's hair resulted in a permanent color change. b. the blond hair was a result of the expression of a recessive gene. c. the fourth child was born with brown hair, but it later turned blonde. d. the blonde hair was a result of a genetic mutation.

You and a friend (alex) are at a a tree-top adventure park .. . part of the course requires you to climb up a rope. you both climb the same rope in the same amount of time. however, the tension in the rope is greater when alex climbs. who did the most work? alex did - more tension means more force - more force means more work was done you did - less tension means less force - less force means more work was done to find the work done, the force exerted and distance moved are multiplied. a couch is moved twice before you are happy with its placement. the same force was used to move the couch both times. if more work is done the first time it is moved, what do you know about the distance it was moved? when more work was done, the couch was moved less. when more work was done, the couch was moved further. when more work was done, the couch wasn't moved at all. when more work was done, the couch was moved the same distance.

What are similarities and differences between refraction, reflection, diffraction and absorption?

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up