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.

The plum pudding model of the atom states that ?

In which situation has the independent variable for the experiment been changed? check all that apply. changed from counting the number of duckweed at day 0 and day 14 to counting them every day changed from testing duckweed growth in beakers to testing duckweed growth in large outdoor tanks changed from testing the effect of ph on duckweed growth to testing the effect of light levels on duckweed growth changed from testing the effect of acid ph on duckweed growth to testing the effect of basic ph on duckweed growth

Calculate the capacitance of a system that stores 2.0 x 10^-10c of charge at 100.0 v. use c=q/v. a. 2.0 x 10^-12 f b. 2.0 x 10^-8 f c. 5.0 x 10^11 f d. 5.0 x 10^7 f