Answer:The source of all wave motion is a disturbance in matter or a vibration. Think about a water wave.
Explanation:
The x component of the force is 8.4N * cos(31°) = 7.2N (2 s.f.)
Answer:B) It was not understood by scientific world.
Explanation:
False... motion is a change in position. Not direction
Answer: 2.83 J/mol
Explanation:
Heat of solution, sometimes interchangeably called enthalpy of solution, is said to be the energy released or absorbed when the solute dissolves in the solvent. A solute is that which can dissolve in a solvent, to form a solution
Given
No of moles of CaCl = 7.5 mol
Total energy used = 21.2 J
Heat of solution = q/n where
q = total energy
n = number of moles
Heat of solution = 21.2 / 7.5
Heat of solution = 2.83 J/mol