Answer:
0.21 m/s/s.
Explanation:
Whenever there is an action force acting on a body, there will be a reaction force.
Here the force with which the astronaut throws the tool is given as 16 N.
Force is measured in newtons and is equal to the rate of change of momentum.
Since the astronaut has a mass, she experience a reaction force. It is given by F = ma, according to Newton's 2nd law.
16 = 75 a
⇒ Acceleration = a = F/m = 16/75 = 0.21 m/s/s
The beaker which consists of water at a temperature of 45℃ represents ‘The average kinetic energy of water particles’.
<u>Explanation:
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According to ‘Kinetic Molecular Theory of water’ the average kinetic energy of atoms in a system is directly proportional to its temperature. So, this explains that the kinetic energy in between the inner particles of water which is in the beaker is something which represents the temperature of the water as 45℃. This kinetic energy is produced due to the moment of particles of the matter. (A liquid is the second state of matter which is prepared by tiny particles, such as atoms, inter-molecular bonds between the particles helps these atoms to hold together)
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Answer:
<em>10500 J</em>
Explanation:
<em>Heat:</em> Heat is defined as a form of energy that brings about the sensation of warmth. The S.I unit of heat is Joules (J)
Q = cm(T₂-T₁)..................................... Equation 1
Where Q = quantity of heat, c = specific heat capacity of water, m = mass of water, T₂ = final temperature, T₁ = initial temperature.
<em>Given: m = 100 g = (100/1000) kg = 0.1 kg, T₁ = 25 °C, T₂ = 50 °C.</em>
<em>Constant: c = 4200 J/kg.°C</em>
<em>Substituting these values into equation 1</em>
<em>Q = 0.1×4200×(50-25)</em>
<em>Q = 420×25</em>
<em>Q = 10500 J</em>
<em>Thus the amount of heat needed to raise the temperature of 100 g of water from 25 °C to 50 °C = 10500 J</em>
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Magnetic field is produced by the magnet which will flow through any attractive item or even substance such as ferrofluid. Happy I could help:)