Alight bulb, a fan, and a tiny speaker are connected to a battery in a series circuit. how will the circuit behave if it is open?
a) none of the devices will work.
b) the battery will heat up and explode.
c) only the device closest to the battery will work.
d) the bulb will light, the fan will blow, and the speaker will make noise.

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.

Idon’t quite understand this problem

Aball of mass 0.3kg is released from rest at a height of 8m.how fast is it going when it hits the ground? accleration due to gravity is g=9.8m/s