Design a balance that finds mass by comparing the mass of known object to the mass of an known object to the mass of an unknown object. study the triple- beam balance used in this activity and think about how you could balance two or more objects. construct your balance and use it to find the mass of an object. how could you improve your balance?

Which of the following types of stars is most likely to end up as a supernova? in graph a, the curve peaks at 800 nm, in the red section of the visible light spectrum. in graph b, the curve peaks at 550 nm, in the green section of the visible light spectrum. in graph c, the curve peaks at 450 nm, in the blue section of the visible light spectrum. in graph d, the curve peaks at 300 nm, in the violet section of the visible light spectrum. a b c d