A 2 kg block of wood is pulled along a level surface by a rope as shown below. The tension on the rope is 20 N and the friction between the block and surface is 2 N. What is the acceleration of the block? (F = ma

The boy of mass 30 kg is at r1= 2 meters from the fulcrum. of the girl is 45 kg, at what r2 must she sit so that they are balanced ?

In a voltaic cell, electrons flow from the (positive/negative) to the (positive/negative) terminal.

Global climatic patterns are changing because of the melting of polar ice caps. the melting of polar ice caps is an example of the interaction between the atmosphere and cryosphere cryosphere and geosphere hydrosphere and geosphere biosphere and cryosphere