The speed of an object is given by v = 5.00t^2 + 4.00t where v is in m/s and t is in s. what is the acceleration of the object at t = 2s?

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

Which statement is true? a. kepler's laws apply only to the motion of earth. b. kepler's laws can be used to predict eclipses. c. kepler's laws are true for a central force that is directly proportional to distance. d. kepler's laws can be deduced from newton's laws of motion and gravity.

If 2 moles of co_2 at 2l and 500k are expanded reversibly to 20l, more work can be obtained from an adiabatic process than from an isothermal process. is the above statement true or false?