Get premium membership and access questions with answers, video lessons as well as revision papers.
Wavelength is the distance between two successive points in phase.
chrispohmomanyi answered the question on September 21, 2017 at 11:48
- A trolley of mass 0.5kg moving with a velocity of I .2ms-1 collides inelastically with a second trolley of mass 1.5kg moving in the...(Solved)
A trolley of mass 0.5kg moving with a velocity of 1.2ms-1 collides inelastically with a second trolley of mass 1.5kg moving in the same direction with a velocity of 0.2ms-1. Determine the velocity of the trolleys after collission .
Date posted: September 21, 2017. Answers (1)
- What are the differences between electromagnetic waves and mechanical waves(Solved)
What are the differences between electromagnetic waves and mechanical waves
Date posted: September 20, 2017. Answers (1)
- State the first law of refraction(Solved)
State the first law of refraction
Date posted: September 20, 2017. Answers (1)
- Why is the metre bridge method a more accurate means of measuring resistance than Ammeter-voltmeter method.(Solved)
Why is the metre bridge method a more accurate means of measuring resistance than Ammeter-voltmeter method.
Date posted: September 20, 2017. Answers (1)
- State one reason why mercury is preferred as a barometric liquid and not water. (Solved)
State one reason why mercury is preferred as a barometric liquid and not water.
Date posted: September 20, 2017. Answers (1)
- Highlight one fact which shows that heat from the sun does not reach the earth's surface by convection (Solved)
Highlight one fact which shows that heat from the sun does not reach the earth's surface by
convection.
Date posted: September 20, 2017. Answers (1)
- A body in a uniform circular motion experiences acceleration despite moving at a constant
speed. Explain(Solved)
A body in a uniform circular motion experiences acceleration despite moving at a constant
speed. Explain
Date posted: September 20, 2017. Answers (1)
- Calculate the length of a wire required to make a resistor of 0.5 ohms, if the receptivity of the
material is 4.9 x 10^-7 ohm m...(Solved)
Calculate the length of a wire required to make a resistor of 0.5 ohms, if the receptivity of the
material is 4.9 x 10^-7 ohm m and the cross sectional area is 2.0 x 10^-8
Date posted: September 19, 2017. Answers (1)
- The activity of a radioactive substance, initially at 400 counts per second reduces to 50 counts per
second in 72 minutes. Determine the half – life...(Solved)
The activity of a radioactive substance, initially at 400 counts per second reduces to 50 counts per
second in 72 minutes. Determine the half – life of the substance
Date posted: September 19, 2017. Answers (1)
- The primary coils of a transformer has 2000 turns and carries a current of 3A. If the secondary coil
is designed to carry a current of...(Solved)
The primary coils of a transformer has 2000 turns and carries a current of 3A. If the secondary coil
is designed to carry a current of 30A, calculate the maximum number of turns in the secondary
coil.
Date posted: September 19, 2017. Answers (1)
- A heating coil rated 1000 W takes 15 minutes to heat 20kg of a liquid from 26^o C of 42^o C.
Determine the specific heat capacity...(Solved)
A heating coil rated 1000 W takes 15 minutes to heat 20kg of a liquid from 26^o C of 42^o C.
Determine the specific heat capacity of the liquid.
Date posted: September 19, 2017. Answers (1)
- Give one example of a semiconductor and one for a conductor
(Solved)
Give one example of a semiconductor and one for a conductor
Date posted: September 19, 2017. Answers (1)
- Distinguish between semiconductor and conductors(Solved)
Distinguish between semiconductor and conductors
Date posted: September 19, 2017. Answers (1)
- Which instrument which can be used to measure the thickness of the hair(Solved)
Which instrument which can be used to measure the thickness of the hair.
Date posted: September 19, 2017. Answers (1)
- State the accuracy of a vernier caliper.(Solved)
State the accuracy of a vernier caliper.
Date posted: September 19, 2017. Answers (1)
- State the difference between conductors and insulators(Solved)
State the difference between conductors and insulators
Date posted: September 19, 2017. Answers (1)
- Explain why boiling water is not used to sterilize clinical thermometer.(Solved)
Explain why boiling water is not used to sterilize clinical thermometer.
Date posted: September 19, 2017. Answers (1)
- 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. Answers (1)
- State why concrete is usually reinforced with steel in the construction of beams(Solved)
State why concrete is usually reinforced with steel in the construction of beams.
Date posted: September 19, 2017. Answers (1)
- Explain why trees bends towards a busy highway.(Solved)
Explain why trees bends towards a busy highway.
Date posted: September 19, 2017. Answers (1)