A conducting sphere of charge Q is placed in contact with an identical conduction sphere of charge -Q/2. The spheres are then separated by a distance of 15cm, and it is found that each one exerts a repulsive force of 0.033N on the other. How many electrons is each sphere missing?

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

How does an observation about an object differ from an inference about that object

Which type of energy would have nothing to do with ironing clothes? a. heat b. chemical c. electrical d. mechanical