Your little cousin, Lincoln, knows more than you about everything. During dinner, he proudly tells your family that an oven uses one method of heat transfer to cook food. Using what you know about conduction, convection, and radiation - how would you correct his thinking and explain what kind(s) of heat transfer an oven uses to cook food?

Which explanation describes the forces involved for a person to walk down the sidewalk? a. the person's feet push backward on the sidewalk; the sidewalk pushes backward on the person. b. the person's feet push forward on the sidewalk; the sidewalk does not push on the person. c. the person's feet push backward on the sidewalk; the sidewalk pushes forward on the person. d. the person's feet push forward on the sidewalk; the sidewalk pushes forward on the person.

Can anybody me with this? ? (picture included.)

Determine the fraction of the magnitude of kinetic energy lost by a neutron (m1 = 1.01 u) when it collides head-on and elastically with a target particle at rest which is 21h (heavy hydrogen, m = 2.01 u).