The pendulum in the diagram below swings from position A to B. If we don’t consider friction, what happens to the total mechanical energy as the pendulum swings from position A to position B? (1 point) Responses It declines It declines It remains the same It remains the same It is not conserved It is not conserved It becomes greater.
Rebecca climbs the ladder of a large water slide, waits her turn at the top, and then slides down the slide into a pool. Which answer best describes the energy changes during her time on the slide?(1 point) Responses kinetic → potential → kinetic kinetic → potential → kinetic potential → mechanical → kinetic potential → mechanical → kinetic kinetic → mechanical → potential kinetic → mechanical → potential potential → kinetic → potential
The best answer would be: kinetic → potential → kinetic.
Kim is upstairs, but walks downstairs to the kitchen for a snack. Which statement correctly describes the types of energy she has at the top of the stairs and as she walks down the stairs?(1 point) Responses kinetic energy at the top of the stairs; potential energy as she walks down kinetic energy at the top of the stairs; potential energy as she walks down kinetic energy at the top of the stairs; kinetic energy as she walks down kinetic energy at the top of the stairs; kinetic energy as she walks down potential energy at the top of the stairs; kinetic energy as she walks down potential energy at the top of the stairs; kinetic energy as she walks down potential energy at the top of the stairs; potential energy as she walks down
The correct answer is: potential energy at the top of the stairs; kinetic energy as she walks down.
As energy is transferred or conserved, some of that energy becomes unavailable to do work. What happens to this unavailable energy?(1 point) Responses The unavailable energy is conducted The unavailable energy is conducted The unavailable energy is given off as microwaves The unavailable energy is given off as microwaves The unavailable energy is destroyed The unavailable energy is destroyed The unavailable energy is given off as heat
The unavailable energy is given off as heat.
Two samples of pure water are mixed with food coloring. One sample is red, and the other is blue. When the two water samples are combined, the red water floats on top of the blue water. Which statement best explains this result? (1 point) Responses The red water is colder and is more dense. The red water is colder and is more dense. The blue water is colder and is less dense. The blue water is colder and is less dense. The red water is warmer and is less dense. The red water is warmer and is less dense. The blue water is warmer and is more dense.
The blue water is colder and is less dense.
Which investigation would best show the transfer of heat energy without any type of matter as a medium?(1 point) Responses an investigation of conduction using collisions between particles an investigation of conduction using collisions between particles an investigation of conduction through movement of particles within a solid an investigation of conduction through movement of particles within a solid an investigation of radiation using electromagnetic waves an investigation of radiation using electromagnetic waves an investigation of radiation using a current within a fluid
