Answer:
<em>The mass of mercury = 0.136 kg</em>
Explanation:
Density: This is defined as the ratio of mass of a body and the volume of that body. The S.I unit of density is kg/m³. It can be represented mathematically as
D = m/v
m = D× v .......................... Equation 1
Where D = density of the mercury, m = mass of the mercury, v = volume of the mercury.
<em>Given: D = 13600 kg/m², v = 10 cm³ = (10×1/1000000) = 0.00001 m³</em>
<em>Substituting these values into equation 1,</em>
<em>m = 13600×0.00001</em>
<em>m = 0.136 kg.</em>
<em>Therefore the mass of mercury = 0.136 kg</em>
Answer:
The ratio of kinetic energies of 5 kg object to 20 kg object is 1:1.
Explanation:
Kinetic energy is defined as energy possessed by an object due to its motion.It is calculated by:
Kinetic energy of the 5 kg object.
Mass of object,m = 5 kg
Velocity of an object = v
Kinetic energy of the 20 kg object.
Mass of object,m' = 20 kg
Velocity of an object = v'
The ratio of the kinetic energy of the 5 kilogram object to the kinetic energy of the 20-kilogram object:
Given that, v = 2v'
The ratio of kinetic energies of 5 kg object to 20 kg object is 1:1.
Answer: 1350J
Explanation:
To solve this, we are going to use the formula for calculating potential difference which is:
Potential difference (V) = Work done (W) / Total charge (C)
Therefore,
9 volts = Work done / 150
Work done = 150 × 9 = 1350J
With the force directly proportional to the product of the masses and inversely proportional to the square of the distance between them...