How much potassium nitrate, KNO3, would completely dissolve in 100g of water at 40℃? A. 28 grams

B. 108 grams

C. 45 grams

D. 65 grams

Pls help, I'll mark brainiest I really need a good grade, so pls answer correctly.

Starting with only the balmer series light (visible light), how could we ensure that the solar panels generate a current that mark can use for his power station? a)by gradually increasing the brightness (amount) of light that we shine on it. b)by gradually increasing the frequency of the light we shine on it. c)by gradually increasing the wavelength of the light that we shine on it.

What is the most useful equation for electric power?

A10 kg box initially at rest is pulled 18 meters across a horizontal, frictionless surface by a 40 n force. what is the block’s final velocity over the 18 meters?