7 A slide projector includes a converging lens that gives a real image on a screen located 6.00
m away from the lens. A slide 20.0 cm high is to be projected so that its image fills a screen
2.00 m high. How far from the slide should the lens of the projector be placed to form the
image on the screen?

A.0.6m
B.3m
C.5m
D.1m​

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 would be the strength of earth's gravitational field at a point where an 80.0 kg astronaut would experience a 80% reduction in weight

Complete the sentence to describe the law of conservation of energy. the law of conservation of energy states that energy cannot be created