How do observing and inferring differ?
2 answers:
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Part a)
Power rated on the elevator is given as
now the mass that is lifted above is given as
height of the elevator lifted is
now the potential energy is given as
now power is defined as rate of energy
so it will take 13.5 s to lift up
Part b)
Electrical energy used
so electrical energy used in this process will be 120050 J
Answer:
Latent Heat of Vaporization of Nitrogen is
Explanation:
• We have learned that adding thermal energy by heat increases the temperature of a substance.
• But surprisingly, there are situations where adding energy does not change the temperature of a substance at all. Instead, the additional thermal energy acts to loosen bonds between molecules or atoms and causes a phase change.
• Because this energy enters or leaves a system during a phase change without causing a temperature change in the system, it is known as latent heat (latent means hidden).
• Latent heat of vaporization is a physical property of a substance.
• It is defined as the heat required to change one mole of liquid at its boiling point under standard atmospheric pressure. It is expressed as kg/mol or kJ/kg.
• When a material in liquid state is given energy, it changes its phase from liquid to vapor; the energy absorbed in this process is called heat of vaporization.
• Latent Heat of Vaporization of Nitrogen is