Answer:
The melting point of a substance referst to the temperature at which it changes state from solid to liquid. Therefore, the statement "The melting point of glycerine is 13 degree celsius" means that when the temperature at which glycerine is subjected is equal or higher than 13 degree celsius, it changes state from solid to liquid.
For example, the melting point of water is 0 °C. It means that when the temperature is higher than 0°C water goes from solid (Ice) to liquid. We all have seen that, right? ✔️
The correct answer is Upthrust= 0.7N and Volume = 1.02 x 10⁻² g
Solid weighs.09 N in air.
Solid weighs less than liquid because of an upward force operating on it (solid weighs in liquid =.02 N).
A solid body experiences an upthrust when it is partially or entirely submerged in a fluid, such as water. In this case, the fluid's weight (water) equals the fluid's weight that the water has displaced.
upthrust is = to.09 -.02 N = 0.7N.
Upthrust = displaced liquid's weight
so that weight of liquid equal to volume of solid = 0.7 N
Volume of solid times mass of liquid = 0.07/9.8 = 0.00714 = 7.14 x 10⁻³ kg
Volume = Mass / density
Volume = 7.14 x 10⁻³ / 700
= 1.02 x 10⁻⁵ kg= 1.02 x 10⁻² g
To learn more about upthrust refer the link:
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There is no picture to reference from so I’m going to take a wild guess and say A
Pressure = F/A
Where,
F = Force exerted = 150 N
A = Area = 1*0.5 = 0.5 m^2
Therefore,
Pressure exerted by wind on the wind = 150/0.5 = 300 N/m^2
1 N/m^2 = 1 Pa,
Then,
Pressure, P = 300 Pa