An electric motor rotating a workshop grinding wheel at a rate of 239 rev/min is switched off. Assume constant angular deceleration of magnitude 2.11 rad/s 2 . Through how many revolutions does the wheel turn before it finally comes to rest

In a closed system, the total energy prior to an energy transformation is the total energy after. a. equal to b. unrelated to c. greater than d. less than

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

Anybody wanna ? (picture included? )