Answer:
option (b)
Explanation:
According to the Pascal's law
F / A = f / a
Where, F is the force on ram, A be the area of ram, f be the force on plunger and a be the area of plunger.
Diameter of ram, D = 20 cm, R = 20 / 2 = 10 cm
A = π R^2 = π x 100 cm^2
F = 3 tons = 3000 kgf
diameter of plunger, d = 3 cm, r = 1.5 cm
a = π x 2.25 cm^2
Use Pascal's law
3000 / π x 100 = f / π x 2.25
f = 67.5 Kgf
By law of refraction we know that image position and object positions are related to each other by following relation
here we know that
now by above formula
so apparent depth of the bottom is seen by the observer as h = 3.39 cm
Hello there.
<span>It takes 3 minutes to make toast in a 1500 watt toaster. Calculate how much work is done by the toaster.
</span>270,000 J
The temperature and the solubility of sugar at that temperature
Explanation:
The amount of substance which can be dissolved in the solvent depends on the temperature.
As the temperature increases, more substance can be dissolved.
A solution is saturated if any more of the solute cannot be dissolved in the solution at the given temperature
Hence we need to know the temperature and also the amount of substance which can be dissolved(solubility) at the same temperature
a) the statement given in option A is correct
b) molar mass has no correlation with the substance's solubility and hence option b is not correct
c) The percent by volume of the solution is not needed to find if the solution is saturated and hence option c is not correct
Answer:
, 
Explanation:
The jet is flying at constant velocity: this means that its acceleration is zero, so the net force acting on the jet is also zero.
Therefore, we can write:
where
is the thrust force generated by each engine of the jet
is the drag force
Solving for Fd,
The velocity of the jet is
So, the rate at which the drag force does work (which is the power) is
and substituting
we find
Converting into horsepower,
