Mr. franklin uses a machine that has an efficiency of 80%. the machine applies a force of 800 n through a distance of 20 m. mr. franklin applies a force of 50 n on the machine. through what distance does mr. franklin apply the force?
a. 4 m
b. 16 m
c. 260 m
d. 400 m

Imagine you had to physically add electrons, one at a time, to a previously neutral conductor. you add one electron very easily, but the second electron requires more work. in your initial post to the discussion, explain why this is. also, what happens to the work needed to add the third, fourth, fifth, and subsequent electrons

Which types of electromagnetic waves have higher frequencies than the waves that make up ultraviolet light? check all that apply. radio waves infrared light microwaves gamma rays visible light x-rays

If steel is more dense that lake water, why can a boat float