Plant cells are rectangular or squarish in shape.
Plant cells have a large vacuole.
Answer:
Thermal energy is taken from heat sink in higher temperature. A thermal power machine does mechanical energy using part of the heat.
Part of heat taken are given in cold reservoir in lower temperature
Explanation:
Change the places of 'acts against the motion of an object' and 'causes an object to change speed or direction'
To find the number of neutrons, subtract the number of protons from the mass number. number of neutrons=40−19=21.