Question
When a liquid is heated in a container, which of the
following processes primarily causes the heat transfer within the liquid? ÂSolution
In liquids and gases, convection is the primary mode of heat transfer.  Hot liquid becomes lighter (lower density) and rises, while cooler liquid (higher density) sinks, creating convection currents.  Conduction happens mainly in solids; radiation involves electromagnetic waves and does not need a medium.
Onions, broccoli, fresh fruits, milk, eggs, and iodized salt are good sources of _________.
When a metal reacts with dilute hydrochloric acid, it produces:
What is the chemical symbol for Gold?Â
A spring of spring constant 500 N/m is compressed by 5 cm. The potential energy stored is:
Which one of the following statement regarding the sun is correct?Â
A body of mass 4 kg falls freely from a height of 5 m. What is its kinetic energy just before it hits the ground? (Take g = 10m/s²)
What happens when sodium reacts with water?
Which gas is responsible for the ozone layer's depletion?
Humans have _____ lobes in the left lung.
Which of these is not a function of proteins?
