The free body diagram below represents silly sally hanging from a trapeze bar. sally weighs1,000 newtons. what is the force in each of the chains holding thetrapeze bar? a) 1,000 nb) 9,800 nc) 500 nd) 10.41 n

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

What are similarities and differences between refraction, reflection, diffraction and absorption?

Aspring has a natural length of 8 m. if a 12-n force is required to keep it stretched to a length of 10 m, how much work w is required to stretch it from 8 m to 16 m? (round your answer to two decimal places.)