The "lead" in pencils is a graphite composition with a young's modulus of approximately 1.0 ✕ 109 n/m2. calculate the change in length (in mm) of the lead in an automatic pencil if you tap it straight into the pencil with a force of 4.8 n. the lead is 0.70 mm in diameter and 59 mm long. (enter the magnitude.)

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

Choose all the answers that apply. our solar system: is in a spiral galaxy no longer includes pluto is made mostly of empty space is in the andromeda galaxy is the only known system that supports life

Imagine that you have two balloons (or, better yet, actually inflate two balloons, if possible). create static electricity around one of the balloons by rubbing it against your hair or your sweater and then bring that balloon close to the other balloon, which has not been charged. try this with at least one other object—and for variety in the discussion, avoid using an object already described by your classmates. then, for your initial post to the discussion, answer the following questions: what happened with the two balloons?