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the reflected ray will be reflected by 20 degrees.
chrispohmomanyi answered the question on February 9, 2018 at 05:25
- A search boat uses a signal of frequency 6.0 x 104 Hz to detect a sunken
ship directly below. Two reflected signals are received; one...(Solved)
A search boat uses a signal of frequency 6.0 x 104 Hz to detect a sunken
ship directly below. Two reflected signals are received; one after 0.1
seconds from sunken boat and the other after 0.14 seconds from the sea
bed. If the sea bed is 98 m below the boat, determine:-
(i)The speed of the signal in water.
(ii)The depth of the sunken ship below the boat
Date posted: February 7, 2018. Answers (1)
- The half-life of an element X is 3.83 days. A sample of this element is
found to have an activity rate of 1.6 x 103...(Solved)
The half-life of an element X is 3.83 days. A sample of this element is
found to have an activity rate of 1.6 x 103 disintegrations per second at a
particular time. Determine its activity rate after 19.15 days
Date posted: February 7, 2018. Answers (1)
- A gas occupies a volume of 4000 litres at a temperature of 37 degrees celcius and normal atmospheric pressure. Determine the new volume of the gas...(Solved)
A gas occupies a volume of 4000 litres at a temperature of 37 degrees celcius and
normal atmospheric pressure. Determine the new volume of the gas if it is
heated at constant pressure to a temperature of 670C (normal atmospheric
pressure P= 1.01 x 105 pa)
Date posted: February 7, 2018. Answers (1)
- How is the image on a pin hole camera increased?(Solved)
How is the image on a pin hole camera increased?
Date posted: February 7, 2018. Answers (2)
- Distinguish between solid,liquid and gas with reference to intermolecular forces?(Solved)
Distinguish between solid,liquid and gas with reference to intermolecular forces?
Date posted: February 5, 2018. Answers (1)
- Give two mechanical properties of composite materials used in fixing teeth(Solved)
Give two mechanical properties of composite materials used in fixing teeth.
Date posted: February 5, 2018. Answers (1)
- State factors that affect the rate of evaporation(Solved)
State factors that affect rate of evaporation
Date posted: January 30, 2018. Answers (1)
- State the three Newton's laws(Solved)
State the three Newton's laws
Date posted: January 30, 2018. Answers (1)
- Explain the benefits of thermal imaging cameras.(Solved)
Explain the benefits of thermal imaging cameras.
Date posted: January 29, 2018. Answers (1)
- State the advantages of using temperature data loggers.(Solved)
State the advantages of using temperature data loggers.
Date posted: January 29, 2018. Answers (1)
- State the advantages of using K-type thermometers.(Solved)
State the advantages of using K-type thermometers.
Date posted: January 29, 2018. Answers (1)
- State the advantages of using probe thermometers.(Solved)
State the advantages of using probe thermometers.
Date posted: January 29, 2018. Answers (1)
- Identify the benefits of using infrared thermometers.(Solved)
Identify the benefits of using infrared thermometers.
Date posted: January 29, 2018. Answers (1)
- Explain why nylon clothes crackles as you undress.(Solved)
Explain why nylon clothes crackles as you undress
Date posted: January 28, 2018. Answers (1)
- State the four axioms of conservation law(Solved)
State the four axioms of conservation law
Date posted: January 27, 2018. Answers (1)
- State the disadvantages of using mirrors as optical instruments?(Solved)
State the disadvantages of using mirrors as optical instruments?
Date posted: January 26, 2018. Answers (1)
- A body weighs 3.6N in air and 2.4N when fully immersed in water.The density of the body in g/cm^3 is?(Solved)
A body weighs 3.6N in air and 2.4N when fully immersed in water.The density of the body in g/cm^3 is?
Date posted: January 25, 2018. Answers (1)
- A machine with an efficiency of 60% is used to overcome a load of 60N through the application of a force of 40N. Calculate...(Solved)
A machine with an efficiency of 60% is used to overcome a load of 60N through the application of a force of 40N. Calculate the velocity ratio of the machine
Date posted: January 24, 2018. Answers (1)
- A bubble of soap blown to the wider end of a funnel,When the top is left open the bubbles flatten to a film which rises...(Solved)
A bubble of soap blown to the wider end of a funnel,When the top is left open the bubbles flatten to a film which rises up the funnel. Explain observation.
Date posted: January 23, 2018. Answers (1)
- Two table tennis balls hang at the same level suspended from a thread a short distance apart. A stream of air is blown between the...(Solved)
Two table tennis balls hang at the same level suspended from a thread a short distance apart. A stream of air is blown between the balls. Explain what happens to the balls.
Date posted: January 23, 2018. Answers (1)