In which scenario is the greatest amount of work done on a wagon? a force of 55 n moves i‎t 8m a force of 60 n moves i‎t 6m a force of 50 n moves i‎t 5m a force of 40 n moves i‎t 10m

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

Polly is pushing a box across the floor with a force of 30 n. the force of gravity is –8 n, and the normal force is 8 n. which value could describe the force of friction if polly could not move the box?

Rohit is trying to tune an instrument