How can you identify the gas proposed in a chemical reaction without observing the atoms and molecules directly, Explain

Rank the torques on the five doors shown in the figure above from least to greatest. note that the magnitude of all the forces is the same

Aforce of 34n stretches a very light ideal spring 0.73 m from equilibrium, what is the force constant (spring constant) of the spring? (a) 47n/m (b) 38n/m (c) 53n/m (d) 25n/m

How many seconds does it take a pebble released from rest off a bridge to fall 29.4 m ? what is the pebble's speed when it has fallen 29.4 m ?