Apiece of chocolate cake contains about 400 calories. a nutritional calorie is equal to 1000 calories (thermochemical calories), which is equal to 4.184 kj. how many 8-in. high steps must a 180-lb. man climb to expend the 400 cal from the piece of cake

Which changes of state do the labels represent? a: b: c:

The long handle on a rake is a(n) a. lever b. screw c. wedge d. inclined plane

Which statement best describes the superposition principle? a.) if two in-phase waves arrive simultaneously at a point, their amplitudes add up b.) if two out-of-phase waves arrive simultaneously at a point, their amplitudes add up c.) if two in-phase waves arrive at a point one after another, their amplitudes add up d.) if two out-of-phase waves arrive at a point one after another, their amplitudes adds up