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Soil water potential is the work done by water as it moves from its present state to the reference state. It is potential energy per unit quantity of water , relative to the reference potential of zero.
joseph kieti answered the question on December 7, 2017 at 13:10
- The X-rays are used for detecting cracks inside metal beams (i) State the type of the x-rays used (ii) Give a reason for the above answer.(Solved)
The X-rays are used for detecting cracks inside metal beams.
i. State the type of the x-rays used.
ii. Give a reason for the above answer.
Date posted: December 5, 2017. Answers (1)
- If one increases the E.H.T. in the X-ray tube, state and explain what will happen to the X-rays produced.(Solved)
If one increases the E.H.T. in the X-ray tube, state and explain what will happen to the X-rays produced.
Date posted: December 5, 2017. Answers (1)
- How do you convert binary number to BCD.(Solved)
How do you convert binary number to BCD.
Date posted: December 5, 2017. Answers (1)
- How do you convert Binary Coded Decimal(BCD) to binary(Solved)
How do you convert Binary Coded Decimal(BCD) to binary.
Date posted: December 5, 2017. Answers (1)
- Briefly explain why rooms are at a lower level and ventilators at a higher level
(Solved)
Briefly explain why rooms are at a lower level and ventilators at a higher level
Date posted: December 5, 2017. Answers (1)
- Give the two differences between the cathode ray tube (CRT) of a T.V. and the cathode ray oscilloscope (CRO).(Solved)
Alternating current (a.c.) is used for transmitting electricity over long distance, state the reason.
Date posted: December 4, 2017. Answers (1)
- The follow table shows electric appliances to be used in a home. The electrical rating for each appliance is shown. The fuses available are 5A,...(Solved)
9. The follow table shows electric appliances to be used in a home. The electrical rating for each appliance is shown. The fuses available are 5A, 15A, 30A and 45 A
Appliance-----voltage(V)-----Power(w)
T.V.----------240----------300
Iron box------240----------720
Electrical kettle--240----2400
Determine which one of the fuses is suitable for the house.
Date posted: December 4, 2017. Answers (1)
- Alternating current (a.c.) is used for transmitting electricity over long distance, state the reason. (Solved)
Alternating current (a.c.) is used for transmitting electricity over long distance, state the reason.
Date posted: December 4, 2017. Answers (1)
- Heating in the coils when current flows is one of the causes of energy loss in a transformer. State : (i) The reason why the current causes...(Solved)
Heating in the coils when current flows is one of the causes of energy loss in a transformer. State :
(i) The reason why the current causes heating.
(ii)How the heating can be minimized.
Date posted: December 4, 2017. Answers (1)
- The primary coil of a transformer has 2000 turns and secondary coil is connect to a 240V a.c. mains supply (a) Explain how an e.m.f. is...(Solved)
The primary coil of a transformer has 2000 turns and secondary coil is connect to a 240V a.c. mains supply.
(a)Explain how an e.m.f. is induced in the secondary voltage.
(b)Determine the secondary voltage
Date posted: December 4, 2017. Answers (1)
- In a transformer the ratio of primary to secondary is 1:10. A current of 200mA flow through a 200 ohm resistor in the secondary circuit....(Solved)
In a transformer the ratio of primary to secondary is 1:10. A current of 200mA flow through a 200 ohm resistor in the secondary circuit. Assuming that the transformer is 100% efficient, determine:
a. The secondary voltage.
b. The primary voltage.
c. The primary current.
Date posted: December 4, 2017. Answers (1)
- Electric power is transmitted over long distance at high voltage. Explain.(Solved)
Electric power is transmitted over long distance at high voltage. Explain.
Date posted: December 4, 2017. Answers (1)
- Explain how the energy losses are reduced in a transform by having : (a) A soft iron core (b) A laminated core(Solved)
Explain how the energy losses are reduced in a transform by having :
a. A soft iron core
b. A laminated core
Date posted: December 4, 2017. Answers (1)
- State the five terms of the semi empirical mass formula.(Solved)
State the five terms of the semi empirical mass formula.
Date posted: November 30, 2017. Answers (1)
- What is a transistor?(Solved)
What is a transistor?
Date posted: November 30, 2017. Answers (1)
- State the two purposes of the iron core in AC transformer.(Solved)
State the two purposes of the iron core in AC transformer.
Date posted: November 30, 2017. Answers (1)
- Give factors to be considered when choosing the type of instrument used in measuring?
(Solved)
Give factors to be considered when choosing the type of instrument used in measuring?
Date posted: November 30, 2017. Answers (1)
- State two drawbacks of Thomson's Atomic model.(Solved)
This is under Atomic Physics
Date posted: November 29, 2017. Answers (1)
- State three types of chemical bonding.(Solved)
This is under solid state Physics.
Date posted: November 29, 2017. Answers (1)
- List five applications of friction(Solved)
List five applications of friction
Date posted: November 27, 2017. Answers (1)