Keisha is making a diagram of a simple machine in the body. (shows a bicep flexing, and x= the hand, z= the bicep, y= the elbow)

Which labels complete the diagram?

X: load

Y: fulcrum

Z: lever

X: fulcrum

Y: wedge

Z: load

X: wedge

Y: fulcrum

Z: load

X: lever

Y: load

Z: fulcrum

Ms. hidalgo opens the door to her classroom. her classroom is 60 degrees and the air outside is 80. predict what will happen using your knowledge of how heat flows.

Two cannon balls weighing 18 kg and 24 kg are chained together and fired horizontally with a velocity of 165 m/s from the top of a 21-m wall. the chain breaks during the flight of the cannonballs and the 18-kg cannonball strikes the ground at t = 1.5 s, at a distance of 240 m from the foot of the wall, and 7 m to the right of the line of fire. determine the position of the other cannonball at that instant. neglect the resistance of the air.

Ateacher gives students four liquids commonly found in the kitchen - vinegar, apple juice, dish detergent, and milk - and ph indicator strips, which measure acidity. the teacher asks the students to put the liquids in order from most acidic to most basic. what type of investigation could the students conduct to determine the correct order for the liquids?