before jane gives a presentation to her class ,she gets nervous and her heart begins beating faster than usual. which statement best classifies this reaction?

Work out sian speed for the first 30 minutes of her journey. give your answer in km/h.

Explain why you think this diagram shows what happened to the carbon in the biodome.

Anonzero net force acts on a particle and does work. which one of the following statements is true? the kinetic energy of the particle changes, but the speed of the particle does not change. the kinetic energy of the particle does not change, but the speed of the particle does change. the kinetic energy of the particle changes, but the velocity of the particle does not change. the kinetic energy and the speed of the particle change, but the velocity of the particle does not change. the kinetic energy, speed, and velocity of the particle change.