A capillary tube 2mm in diameter is immerse in a beaker of mercury. The Mercury level inside the tube is found to be 0.5cm below the
level of the reservoir. Determine the contact angle
between the Mercury and the glass ( take surface tension of mercury = 0.4N/m and density of mercury=13.5*10³
storkagen
between the​

The direction of the current in an alternating current circuit remains constant. is direct. changes repeatedly. changes randomly.

Hydroelectricity provides about 7 percent of the electricity generated in the united states. (a) explain how a hydroelectric power plant converts energy stored in water into electricity. (b) identify two factors that determine the amount of electricity that can be generated by an individual hydroelectricity power plant. (c) describe the two main types of land-based hydroelectric power plants. (d) describe two economic advantages and two environmental disadvantages of hydroelectricity.

Why do some scientists and archeologists think that volta was not the first person to build a battery