How much heat energy is required to raise the temperature of 20 kilograms of water from 0.c to 35.c?

Amira pulls a 3 pound wagon 4 feet. how much work has she done?

What is the thinnest soap film (excluding the case of zero thickness) that appears black when illuminated with light with a wavelength of 480 ? the index of refraction of the film is 1.34, and there is air on both sides of the film. express your answer in nanometers. hint 1. how to approach th

Decreased sensitivity to an unchanging stimulus is known as