5. a particle starts from the origin at t=0 with an initial velocity having an xcomponent
of 20 m/s and a ycomponent of 15 m/s. the particle moves in the ryplane with an
component of acceleration only, given by a.- 4.0 m/s2. (a) determine the components
of the velocity vector at any time and the total velocity vector at any time. (b) calculate
the velocity and speed of the particle at 150 s. determine the rand coordinates of the
particle at any time fand the position vector at this time

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

How will the system respond to a temperature increase?

Discuss how the hardness or softness of the landing surface is related to the time required to stop the egg