Answer:
2 × 10⁸J/kg
Explanation:
Specific latent heat of vaporization (steam) is the quantity of heat required or needed to change a unit of mass of liquid to gaseous state at constant temperature (boiling point) and pressure.
It can be calculated mathematically using,
Q = mL
Where, Q = quantity of heat
m= mass in kg
L = specific latent heat (J/kg)
Therefore,from the question
Q= 15000000J
mass (m) = 75g = 75/1000 kg = 0.075kg
Q = mL
L = Q/m
L = 15000000 ÷ 0.075
L= 200000000J/kg
L = 2 × 10⁸J/kg
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2. kinetic energy: due to it being transferred through collisions
Answer:
Experiment plays many roles in science. One of its important roles is to test theories and to provide the basis for scientific knowledge. ... Experiment can provide hints toward the structure or mathematical form of a theory and it can provide evidence for the existence of the entities involved in our theories.
Answer: ![2.14\ N](https://tex.z-dn.net/?f=2.14%5C%20N)
Explanation:
Given
Force required to accelerate the object at the rate of ![0.6\ m/s^2](https://tex.z-dn.net/?f=0.6%5C%20m%2Fs%5E2)
The weight of the object is ![W=35\ N](https://tex.z-dn.net/?f=W%3D35%5C%20N)
Mass of the object can be identified by dividing the weight by acceleration due to gravity
![\Rightarrow m=\dfrac{W}{g}\\\\\Rightarrow m=\dfrac{35}{9.8}\\\\\Rightarrow m=3.57\ kg](https://tex.z-dn.net/?f=%5CRightarrow%20m%3D%5Cdfrac%7BW%7D%7Bg%7D%5C%5C%5C%5C%5CRightarrow%20m%3D%5Cdfrac%7B35%7D%7B9.8%7D%5C%5C%5C%5C%5CRightarrow%20m%3D3.57%5C%20kg)
![\therefore \text{Force F=}m\times a\\\Rightarrow F=3.57\times 0.6\\\Rightarrow F=2.14\ N](https://tex.z-dn.net/?f=%5Ctherefore%20%5Ctext%7BForce%20F%3D%7Dm%5Ctimes%20a%5C%5C%5CRightarrow%20F%3D3.57%5Ctimes%200.6%5C%5C%5CRightarrow%20F%3D2.14%5C%20N)