A 8.8 kg block on a horizontal frictionless surface is attached to an ideal massless spring whose spring constant is 9.8 N/m The block is pulled from its equilibrium position to a displacement x = +7.1 m and is released from rest. The block then executes simple harmonic motion along the horizontal x-axis. When the displacement is x = -1.8 m find the acceleration of the block.

Alandscaper is shopping for landscaping materials. she wants to use materials through which water flows easily. which materials should she choose? check all that apply. clay gravel granite rocks with cracks loosely packed soil

Identify the correct relation showing that the radius r of the orbit of a moon of a given planet can be determined from the radius r of the planet, the acceleration of gravity at the surface of the planet, and the time τ required by the moon to complete one full revolution about the planet. determine the acceleration of gravity at the surface of the planet jupiter knowing that r = 71 492 km and that t= 3.551 days and r= 670.9 × 10^3 km for its moon europa.

Name two kinds of practical electric pumps.