3. Millie loves to go to the park and play on the swings. She gets on her favorite swing and she goes back and forth one time in 2.8 seconds. What can we determine from this question? Select all that apply. If Millie's frequency increases, the period will decrease.

Millie's frequency is 0.36 Hz.

Millie's swing period is 0.36 seconds.

Millie's wavelength is 20 inches.

Millie's swing period is 2.8 seconds.​

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

You hang a book bag on a spring scale and place the bag on a platform scale so that the platform scale reads 23.7n and the spring scale reads 13.8n. what is the magnitude of the force that earth exerts on the bag?

(a) if the pressure in gas is doubled while its volume is held constant, by what factor do (i) vrms and (ii) change? (b) is it possible to boil water at room temperature (20oc) without heating it? explain.