The body of your car is supported by four springs that are themselves supported by four wheels. While driving along a

road, you encounter a bump and your car bounces up and down.

Suppose that the bouncing of the car body continued forever

without diminishing. At which point(s) in its bounces would the

car body have the greatest amount of acceleration?

(A) Its acceleration is greatest at the top and bottom of its
bounce.
(B) Its acceleration is greatest as it passes through
equilibrium on its way downward but not upward.
(C) Its acceleration is greatest as it passes through
equilibrium on its way upward but not downward.
(D) Its acceleration is greatest as it passes through
equilibrium in either direction.

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

Astudent creates a model of a closed ecosystem by filling a glass tank half full with water, then adding 10 snails and two small aquatic plants. the next day, all the snails are dead. what is the most likely cause of their death?

What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?