Answer:
The constriction causes the mercury column to break under tension, leaving a vacuum between the bottom of the column and that in the bulb, and the top of the column stays still at the position reached in the body - a "peak hold" system.
Answer:
1 m/s²
Explanation:
a = v² / r
a = ω² r
a = (2π rad / 2π s)² (1 m)
a = 1 m/s²
The weight is in equilibrium, so the two forces acting on it (tension <em>T</em> pulling upward, and its own weight <em>W</em> pulling it downward) cancel each other. By Newton's second law,
∑ <em>F</em> = <em>T</em> - <em>W</em> = 0
so that
<em>T</em> = <em>W</em>
Calculate the object's weight:
<em>W</em> = (20 kg) (9.8 m/s²) = 196 N
So the tension is <em>T</em> = 196 N as well.
Answer:
p>Whether an object will float or sink is dependent on its density, and on the density of the liquid it is placed in. In the case of water, an object with a density less than 1 g/cm3 will float. The closer its density is to 1 g/cm3, the more of it will sit below the water level.
Answer:
Elastic potential energy is energy stored as a result of applying a force to deform an elastic object. The energy is stored until the force is removed and the object springs back to its original shape, doing work in the process. The deformation could involve compressing, stretching or twisting the object.
Explanation: