Which statement about Earth's core helps explain Earth's magnetic field? A) Earth’s core is composed of magnets.
B) Earth's core is composed of iron and nickel.
C) The outer core is solid.
D) The inner core is liquid and moving.

Scout feels ill one day before school. her mother puts a thermometer in her mouth and the temperature begins to climb to 100°f. what is happening between the cooler thermometer and scout's body? a) scout's body is applying a force to the particles in the thermometer. b) kinetic energy is being transferred from her mouth to the thermometer. c) potential energy is being lost by the thermometer and gained by scout's body. d) the potential energy stored in foods is converted to mechanical energy to raise the mercury in the thermometer.

What is the rate of change in a objects position?

The force it would take to accelerate an 900-kg car at the rate of 6m/s2