speed of sound in dry air at 20 °C is___________?A. 353 m/s
B. 345 m/s
C. 343 m/s
D. none of them
B. 345 m/s
C. 343 m/s
D. none of them
Everyday Science Mcqs
Sound travels about ___________times faster in water than in air.
Sound travels about ___________times faster in water than in air.
A. 2
B. 3
C. 4
D. 5
Sound travels 4.3 times faster in water than air. In water, the particles are much closer together and they can quickly transmit vibration energy and the sound wave travels over four times faster than it would in air.
Nervous system includes which of these major components?
Nervous system includes which of these major components?
A. Brain
B. Brain & Back Bone
C. brain, sal cord and neurons
D. None
The lenses are used for the correction of:____________?
The lenses are used for the correction of:____________?A. Long-sightedness
B. short sightedness
C. Both A & B
D. None of those
B. short sightedness
C. Both A & B
D. None of those
Water has been discovered on which potentially habitable super-Earth ?
Water has been discovered on which potentially habitable super-Earth ?
A. K2-14d
B. K2-15c
C. K2-13a
D. K2-18b
K2-18b was first discovered in 2015 by Nasa’s now retired Kepler space telescope. It was found orbiting within the red dwarf star’s habitable zone, making it an ideal candidate to have liquid surface water.
The Saturn rings discovered by___________?
The Saturn rings discovered by___________?A. Newton
B. Robert Brown
C. Galileo
D. None of these
B. Robert Brown
C. Galileo
D. None of these
The Planet which revolves slowly around the Sun is__________?
The Planet which revolves slowly around the Sun is__________?A. Mercury
B. Mars
C. Earth
D. Neptune
B. Mars
C. Earth
D. Neptune
The “Rising” of the “evening star” indicates the direction of the____________?
The “Rising” of the “evening star” indicates the direction of the____________?A. South Pole
B. East
C. West
D. North
B. East
C. West
D. North
The hot planet, “Venus” is called as the “Evening star” due to its appearance to the “naked eye” at the evening. It can be easily “seen” in the “naked eye” in the evening sky after the sun sets in the west direction. That’s why we are saying it rises in the west. This is also referred as “Morning star” when it changes its orbital position and it looks even brighter in the morning than in the evening.
The reason why it is visible to the people residing on the earth is that it is so closer to the earth than any other planets in the solar system. As Venus is nearer to sun, it is the brightest one and can be viewed from the earth.
Reptiles hibernate during_______?
Reptiles hibernate during_______?
A. Summer
B. Winter
C. Spring
D. Autumn
Which of the following plants are called arthrophytes?
Which of the following plants are called arthrophytes?
A. Sphenopsids
B. Lycopsids
C. Psilopsids
D. Pteropsids