iron Bars form a solenoid when wrapped in a coil by a current carrying copper conducting wire .
copper coils generate a magnetic field when a current is passed through the coil . according to the helmholtz law.
Answer:
False
Explanation:
Light energy travels from the Sun to the Earth and is transformed into chemical energy by plants.
Answer:
The answer is A, It shows an exothermic overall reaction.
Explanation:
Answer:
Explanation: It has been given that the temperature of the water decreases when chromium chloride is dissolved in water. Thus fall in the temperature explains the fact that the bond energies of the reactants have more energy rather than the products.
a) Thus the heat of the solution is endothermic in nature as more energy is needed to break the reactant molecules.
b) The combined ionic bond strength of CrCl2 and inter molecular forces between water molecules must be stronger than the attractive forces between the water molecules and chromium and chloride ions as the reaction is endothermic in nature thus more energy would be required to break the bonds between the reactants hence making them more stronger.
As the temperature is lowered matter is more likely to exist in the solid state
