Which of these is true about the speed of sound through solids, liquids and gases?
why the speed of sound is slowest through gases
Tarun carried out an experiment to show that plants respond to light. The diagram on the right shows how the plant looked like after a week.
Which one of the following set-ups did he use for his experiment?
The structures X shown in the picture are found in plants growing in ______ areas and are a modification of ______.
A Marshy, Stem
B Desert, Root
C Marshy, Root
D Desert, Stem
The given set-up shows separation of impurities from water. Select the correct option for figure.
|A||Distillation||Water + Salt||Pure water|
|B||Evaporation||Water + Mud||Mud|
|C||Filtration||Water + Salt||Pure water|
|D||Sublimation||Water + Sugar||Water|
options in P and Q should be interchanged/
Which of the following statements is incorrect?
A Gold and silver are the most malleable and ductile metals.
B All metals are hard and strong.
C Mercury and gallium are metals which exist in liquid state at room temperature.
D Most of the metals have high specific gravities.
Which of the following representation of the comet around the sun is correct?
Which of the following will change when a person changes his pitch?
B(1) and (2) only
C(1) and (3) only
D(1), (2) and (3)
Wavelength will also change, so answer is (C)