A book with a mass of 1kg is dropped at the height of 0.5m. what is the potential energy of the book when it reaches the bottom? HELLLP also please explain how to get the answer

Abeam of electrons with of wavelength of 7.5 x 10-6 m is incident on a pair of narrow rectangular slits separated by 0.75 mm. the resulting interference pattern is projected onto a screen 10.0 m from the slits. what is the separation of the interference maxima in the resulting interference pattern?

Afrequency generator sends a 550 hz sound wave through both water and ice. what is the difference in wavelength between the wave produced in ice and the wave produced in water?

Which body part transports oxygen removes waste materials in carries nutrients to the body as part of the circulatory system