12 meter long uniform plank weighing 2000N balanced on fulcrum. if the 800N object is placed on the beam 1.5 meters from it's right end where, if it all, can the fulcrum be moved such that this new system remains level and in equilibrium?

A) the system cannot be in equilibrium unless another weight is added to the left side
B) the system cannot be in equilibrium because the beam ins't long enough
C) moving the fulcrum 1.3 meters to the right of the center will balance it
D) moving the fulcrum 0.6 meters to the right of the center of the beam will balance it

What is the difference between electrically neutral objects and electrically charged objects

Under conditions for which the same room temperature is maintained by a heating or cooling system, it is not uncommon for a person to feel chilled in the winter but comfortable in the summer. provide a plausible explanation for this situation (with supporting calculations) by considering a room whose air temperature is maintained at 20â°c throughout the year, while the walls of the room are nominally at 27â°c and 14â°c in the summer and winter, respectively. the exposed surface of a person in the room may be assumed to be at a temperature of 32â°c throughout the year and to have an emissivity of 0.90. the coefficient associated with heat transfer by natural convection between the person and the room air is approximately 2 w/m2 â‹…â‹… k. what is the ratio of the thermal resistance due to convection to the thermal resistance due to radiation in the summer? what is the ratio of thermal resistances in the winter

The slope of a velocity time graph over any interval of time gives the during that interval