Mercury is often used in thermometers. The mercury sits in a bulb on the bottom of the thermometer and rises up a thin capillary tube as the temperature rises. Suppose a mercury thermometer contains 3.380g of mercury and has a capillary that is 0.200mm in diameter. How far does the mercury rise in the capillary when the temperature changes from 0.0 0C to 25.0 0C

3.5 cm

Explanation:

Mass of mercury = 3.380

Diameter = 0.200

At t = 0 and 25 degrees we have 13.596 and 13.543 as density

At 0 degree = v = 3.380/13.596 = 0.2485

At 25 degrees = 3.380/13.534 = 0.2497

We use volume of cylinder to get height

At 0⁰ height = 7.91

At 25⁰ = 7.944

The difference in height = 0.035

Multiply by 100 = 0.35 x100

= 3.5cm

the answer is; comparing the frequency of collisions with and without the device

this makes the anti-collision system an independent variable and the collisions a dependent variable. if there are fewer collisions with an anti-collision system that without, then it can be stated that the system is a success. essentially, collisions under an anti-collision system are compared with the frequency of collisions by cars with the human drivers.

i dont know it at allnow im just getting points at this pint