An echo repeats two syllables. A single syllable takes about 1/5th of a second to utter. If the velocity of sound is 330 m s–1, then the distance of the reflecting surface is
A 66.0 m
B 33.0 m
C 99.0 m
D 16.5 m
Study the given flow chart and answer the following questions.
Which of the following animals can be placed at ‘b’?
The correct answer is option B
Refer to the given flow chart and identify wastes P, Q, R and S.
|A||Plastic container||Urine bag||Dead body of animals||Tea leaves|
|C||Aluminium foil||Ear bud||Wooden spoon||Discarded human organ in a transplant|
|D||Credit card||Cotton balls||Cooked beans||Human excreta|
A vessel contains two plane mirrors at right angles to each other as shown in the figure. If the vessel is filled with water then the total deviation in the ray incident normally is
A student is given an incomplete circuit diagram as shown here.
He has to draw lines to represent the wires connecting the circuit. His aim is to show that the arrangement will allow the bulb to stay lighted for the longest possible time.
Which one of the following circuits is correctly drawn by the student?
Read the given statements and select the correct option.
Statement 1 : Fibres are first spun into yarns, which are then woven or knit into fabrics.
Statement 2 : Weaving is done by interlacing two sets of fibres at right angles on a loom.
ABoth statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
BBoth statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
CStatement 1 is true and statement 2 is false.
DBoth statements 1 and 2 are false.
Which beak belongs to the bird that drinks nectar from flowers ?
The answer is C because the beak is long , straight , narrow and pointed beak . Birds like Hummingbirds have this kind of beaks. It helps them in sucking nectar from flowers.