If the skater has a mass of 55 kg and reaches a height of 3m at the top of the skateboard ramp, calculate the potential energy?

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

The energy produced as a result of this flow of electrons from atom to atom is called

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