What is stored by a dry Leclanhé cell?
chemical energy
heat energy
mechanical energy
nuclear energy
solar energy
Correct answer is A
No explanation has been provided for this answer.
0°
30°
45°
60°
90°
Correct answer is D
Time of flight =\( \frac{2Usin\theta}{g}\)
T = 5, g = 10m/s2
\(5 = \frac {2\times 50sin\theta}{10}\)
\(sin\theta =\frac {50}{100}\)
\(\theta = 30\)
vertical angle = 90 - 30 = 60°
Which radiation is emitted when a beam of fast moving cathode rays is stopped by a heavy element?
Alpha rays
Gamma rays
Positive rays
Ultraviolet rays
X-rays
Correct answer is E
No explanation has been provided for this answer.
The use of electrical fuses in domestic wiring is
to prevent and electrical shock
to supply electricity to all the electrical appliances
to allow electricity to flow easily through the mains to all the circuits
to cut off the mains supply it too high a current flows
to fuse all the circuit into one
Correct answer is D
No explanation has been provided for this answer.
What does NOT affect the rate of evaporation of a liquid
exposed surface area of the liquid
humidity of the surroundings
nature of the liquid
temperature the liquid
volume of the liquid.
Correct answer is E
No explanation has been provided for this answer.