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.

Very large accelerations can injure the body, especially if they last for a considerable length of time. one model used to gauge the likelihood of injury is the severity index ( ), defined as =/ . in the expression, is the duration of the accleration, but is not equal to the acceleration. rather, is a dimensionless constant that = the number of multiples of that the acceleration is equal to.in one set of studies of rear-end collisions, a person's velocity increases by 13.7 km/h with an acceleration of 36.0 m/s2 . let the + direction point in the direction the car is traveling. what is the severity index for the collision?

An open cart is moving along a straight frictionless horizontal track. when rain starts falling vertically into the cart, what happens to the speed of the cart?

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final