The liquid pressure is equal to the product of the weight density and the depth. The pressure of the liquid depends on the depth and the density of the liquid. The mathematical expression is
Where,
Weight density
h = Depth
Replacing we have that
Therefore the water pressure on the bottom of the barrel is 11.8kPa
Answer:
The first law of thermodynamics. In brief, energy can neither be created nor destroyed. However, energy may be converted from one form to another.
Explanation:
A basic electrical solar fan comes in two parts: a solar panel connected to an electrical motor. The solar panel converts solar energy to electricity; the electrical motor converts electricity to mechanical energy, which causes the blades to turn.
This energy conversion is possible because of the first law of thermodynamics. This law states that the total energy of the universe is constant. Energy can neither be created nor destroyed. However, energy may be converted from one form to another.
For example, the solar panel does not destroy the solar energy; it simply converts that energy to electrical energy. Note that a fraction of that energy absorbed was lost as thermal energy. Similarly, the motor merely converts electrical energy to mechanical energy. It might also lose some thermal energy as it heats up.
Answer:
<em>D)Twice as much</em>
Explanation:
Work: This is the product of force and distance along the direction of the force. The S. I unit of work is Joules (J)
Energy: Energy is the ability or the capacity to perform work. Energy and work can be interchange during calculation.
E = W = mgh.................................... Equation 1
Where m = mass of the load, h = height of one story, g = acceleration due to gravity.
<em>constant: g = 9.8 m/s²</em>
When the load is lift up only one story
W = 9.8mh..................... Equation 2
But when the load is lifted through two story,
height = 2h
W = 19.6mh .................... Equation 3
Comparing Equation 2 and equation 3,
It shows that the work done to lift the load up two story is twice the work done to lift the load up one story.
<em>The right option is D)Twice as much</em>
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<span>Orbital notation shows the spin of the electrons.</span>
Answer:
Explanation:
Heat capacity is related to a substance's ability to retain heat and the rate at which it will heat up or cool. For example, a substance with a low heat capacity, such as iron, will heat and cool quickly, while a substance with a high heat capacity, such as water, heats and cools slowly.
