Match the sentences in column a based on whether they describe radio waves, visible light waves, or both (column b). column a 1. they’re invisible. : they’re invisible. 2. they have colors. : they have colors. 3. they’re used to learn about dust and gas clouds. : they’re used to learn about dust and gas clouds. 4. they can travel in a vacuum. : they can travel in a vacuum. 5. they’re used to find the temperature of stars. : they’re used to find the temperature of stars. 6. they have energy. : they have energy.

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.

Which fact supports the conclusion that there will be fewer farm managers in the future? a) a farmer manager’s duties vary by the type of farm. b) farm technology is replacing some administrative jobs c) farm managers often need experience but not education. d) administrative duties include budgeting and training staff.

What is special about a dc circuit ?