Freezing point of water is__________?
Freezing point of water is__________?
A. 0 °C
B. -2 °C
C. -4 °C
D. None of above
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Lignite, bituminous & anthracite are different rank of _________ ?
Lignite, bituminous & anthracite are different rank of _________ ?A. Iron
B. Coal
C. Wood
D. None of theseThe respiratory problem common in smokers is______?
The respiratory problem common in smokers is______?A. tuberculosis
B. Emphysema
C. Asthma
D. CancerJoint in which bones are joined together by fibrous tissues is called _____________ ?
Joint in which bones are joined together by fibrous tissues is called _____________ ?A. Fibrous joint
B. Cartilaginous joint
C. Synovial joint
D. Ball and socket jointFibrous joints are connected by dense connective tissue consisting mainly of collagen. These joints are also called fixed or immovable joints because they do not move. Fibrous joints have no joint cavity and are connected via fibrous connective tissue. The skull bones are connected by fibrous joints called sutures.
When sound waves travel from air to water which of the following quantities remains unchanged?
When sound waves travel from air to water which of the following quantities remains unchanged?A. Speed
B. Frequency
C. Intensity
D. WavelengthSound is propagated in the form of longitudinal waves. When sound travels from one medium to another medium the wavelength and velocity remains changed and the frequency remains unchanged.The velocity of sound in the given medium is obtained by
v=nW, where “n” is the frequency of sound and “W” is its wavelength in that medium. Velocity of sound is directly proportional to the wavelength.Thus, if the velocity of sound wave doubles when travelled from one medium to another medium then its wavelength also doubles.The frequency of sound depends on the source of the sound, not the medium of propagation .Hence the frequency does not change when travelled from air to water.The most distant human-made object sent into the space is?
The most distant human-made object sent into the space is?A. Voyager 1
B. Pioneer 10
C. Eris
D. New HorizonChronometer is invented by________?
Chronometer is invented by________?A. Robert Fulton
B. Nikola Tesla
C. Martin Cooper
D. John Harrison