(50)/400 = (I)n n =3(half-lives)
(2)^n
Half –life 72 = 24 min.
Githiari answered the question on September 19, 2017 at 14:05
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Explain why boiling water is not used to sterilize clinical thermometer.
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Explain why boiling water is not used to sterilize clinical thermometer.
Date posted:
September 19, 2017
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Answers (1)
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State any two reasons why water is not a suitable thermometric fluid.
(Solved)
State any two reasons why water is not a suitable thermometric fluid.
Date posted:
September 19, 2017
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Explain why trees bends towards a busy highway.
(Solved)
Explain why trees bends towards a busy highway.
Date posted:
September 19, 2017
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A car can be brought to rest from a speed of 20 ms-1 in a time of 2s.
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(Solved)
A car can be brought to rest from a speed of 20 ms-1 in a time of 2s.
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Date posted:
September 19, 2017
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Answers (1)
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State factors affecting the spring constant of the spring
(Solved)
State factors affecting the spring constant of the spring
Date posted:
September 19, 2017
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Answers (1)
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State any two factors the affect the stability of a body
(Solved)
State any two factors the affect the stability of a body
Date posted:
September 19, 2017
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Answers (1)
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State the basic laws of magnetism
(Solved)
State the basic laws of magnetism
Date posted:
September 19, 2017
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Answers (1)
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Equal masses of water and paraffin with specific heat capacities CW and CP respectively are heated
using identical sources of heat, for the same length of...
(Solved)
Equal masses of water and paraffin with specific heat capacities CW and CP respectively are heated
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Date posted:
September 18, 2017
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Answers (1)
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A girl heats 5 kg of water to temperature of 80oC. When she adds m kg of water at 15oC the mixture attains...
(Solved)
A girl heats 5 kg of water to temperature of 80oooC. Determine the value of m. (ignore heat changes due to the container)
Date posted:
September 18, 2017
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Answers (1)
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State two defects of a simple cell and how each can be minimized
(Solved)
State two defects of a simple cell and how each can be minimized.
Date posted:
September 18, 2017
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Answers (1)
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Distinguish between a basic physical quantity and a derived physical quantity giving an example of each
(Solved)
Distinguish between a basic physical quantity and a derived physical quantity giving an example of each.
Date posted:
September 18, 2017
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Answers (1)
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State two factors which affect pressure in liquids
(Solved)
State two factors which affect pressure in liquids
Date posted:
September 18, 2017
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Answers (1)
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State three precautions that must be taken when using the density bottle
(Solved)
State three precautions that must be taken when using the density bottle
Date posted:
September 18, 2017
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Answers (1)
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One property of a liquid that is considered while constructing a liquid – in – glass thermometer isthat the liquid expands more than the glass...
(Solved)
One property of a liquid that is considered while constructing a liquid – in – glass thermometer is
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Date posted:
September 18, 2017
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Answers (1)
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State the assumption made when calculating the size of a molecule in the thin oil film experiment
(Solved)
State the assumption made when calculating the size of a molecule in the thin oil film experiment
Date posted:
September 18, 2017
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Answers (1)
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Show that the force driving the liquid through the U – tube is proportional to the height, h
(Solved)
Show that the force driving the liquid through the U – tube is proportional to the height, h
Date posted:
September 18, 2017
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Answers (1)
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Explain why a car feels lighter as it travels at a higher velocity.
(Solved)
Explain why a car feels lighter as it travels at a higher velocity.
Date posted:
September 18, 2017
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Answers (1)
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(Solved)
Water wets clean surfaces of glass but not waxed ones. Explain
Date posted:
September 18, 2017
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Answers (1)
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(Solved)
Name all the forces acting on the mass suspended from a spring balance
Date posted:
September 18, 2017
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Answers (1)
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Explain why aquatic animals are able to survive under water when the surface is already frozen.
(Solved)
Explain why aquatic animals are able to survive under water when the surface is already frozen.
Date posted:
September 16, 2017
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Answers (1)