What of the following is a true statement regarding springs? a. in hooke's law, the force exerted by the spring acts in the same direction as displacement. b. springs are designed to provide unpredictable variations in force. c. the force exerted by a spring has a quadratic relationship with the displacement from equilibrium. d. the higher the value of the spring constant, the stiffer the spring. e. the spring constant is represented by the symbol cs

The position of a crate sliding down a ramp is given by x=(0.05t^3) m, y=(1.7t^2) m, z=(6−0.85t^5/2) m, where t is in seconds. (a) determine the magnitude of the crate's velocity when t = 2 s. (b) determine the magnitude of the crate's acceleration when t = 2 s.

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

Scientist have use computer models to create a series of maps that show how susceptible coastal cities in island countries are to the sea rising at different levels.the map shows that a 1 meter rise would swap cities all along the us eastern seaboard. a 6-meter sea level rise with sub merge a large part of florida. thermal expansion has already raise the oceans 10 to 20 centimeters the most likely cause,directly and indirectly, for such a rise in sea level is