PLS HELP!! Our eyes perceive colors because of differences in which of the following properties of light? Amplitude

Brightness

Wavelength

Source

You carry a 7.0-kg bag of groceries 1.2 m above the ground at constant speed across a 2.7m room. how much work do you do on the bag in the process? (a) 157j (b) 0.00j (c) 185j (d) 82j

The amount of potential energy possessed by an elevated object is equal to what?

Ain is , is 's of ? 0.62 0.79 1.27 1.50