Between a piece of paper and a rock, which will fall the fastest and why?

A positively charged glass rod attracts object X. The net charge of object X:A. may be zero or negative. B. may be zero or positive. C. must be negative. D. must be positive. E. must be zero.

Which of the following objects has the greatest kinetic energy? a baseball flying through the air at 90 miles per hour a baseball flying through the air at 45 miles per hour a baseball flying through the air at 20 miles per hour a baseball sitting

A barbed-wire barrier erected by the East Germans between East and West Berlin that eventually was rebuilt of concrete

A sky diver of mass 70 Kg, and cross sectional area of 0.2 m2 is falling under gravity. Calculate the terminal velocity of this person. (Assume C = 0.88 kg/m3).

Match these items. 1 . involuntary muscle tissues that have fibers 2 . tendons muscle controlled by will 3 . cardiac muscle muscle not controlled by will 4 . voluntary muscle arm muscle 5 . biceps heart muscle

An anion is an atom that has lost electrons. True or False?

Question: Jane, looking for Tarzan, is running at top speed (4.5 m/s) and grabs a vine hanging vertically from a tall tree in the jungle.

Kim holds a pinwheel in the air and says it can be used to model a source of energy. Identify the type of energy Kim's pinwheel models. Explain the type of energy source used.

An example of a stable system

What causes chemical weathering? a. damage caused by animals and plants c. natural acids b. ice wedging d. physical factors