When an incoming wave combines with a reflected wave in such a way that the combined wave appears to be standing still, the result is a a. longitudinal wave. b. standing wave. c. transverse wave. d. surface wave. select the best answer from the choices provided

What is the percentage by mass of silicon (si) in iron aluminum silicate (fe3al2(sio4)3)?

Why is the bond angle in a water molecule less than the bond angle of methane? a. the central oxygen atom in water has two lone pairs of electrons, whereas the central carbon atom in methane has no lone pairs. b. the central hydrogen atom in water has one lone pair of electrons, whereas the central carbon atom in methane has two lone pairs. c. the central oxygen atom in water has four lone pairs of electrons, whereas the central carbon atom in methane has only one lone pair. d. the central oxygen atom exerts more repulsive force on surrounding atoms than the central carbon atom in methane does. reset next

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.