A train moves at a speed (30 m/sec). And when the brakes is used it moves with a decelerating (3 m/sec2). Calculate the time taken to stop the train
5 Sec
15 Sec
10 Sec
20 Sec
A train moves at a speed (100 km/h), then it cover a distance of (40 km) within time .......... hours.
0.6
0.4
0.5
0.3
If the number of chromosomes in liver cells of a certain living organism is (32) chromosomes then the number of chromosomes in ovum cell is.....
16
8
32
24
Mass is considered from… … physical quantity
physical
standard
Scalar
Within minutes of Big Bang, hydrogen gas was formed by a percentage of ...........%
100
75
25
50
The optical piece which forms laterally inverted (reversed) image and equal to the body is .......
spherical mirror
plane mirror
convex lens
concave lens
In Milky Way galaxy, the old stars (the older) gather in the….. of the galaxy.
end
Centre
north
An object is placed at a distance of (8 cm) from a concave lens has a focal length (2 cm),Mention the properties of image formed
virtual, erect and diminished.
real, inverted and diminished.
real, erect and diminished.
Sudden violent nuclear reactions occur within the star which led to its explosion
False
True
A moving car covers a distance of (.........) through (150 min.), then its speed is 80 km/h
100 kilometer
400 kilometer
200 kilometer
A mirror, always forms a diminished image for the object.
Convex mirror
Concave mirror
Calculate the actual speed of the car whose relative speed is (80 km/h) relative to an observer moving in opposite direction at a speed of (30 km/h)
80 km/h
40 km/h
50 km/h
30 km/h
The focal length of a lens It is the distance between the principal Focus and the optical centre of the lens .
Reproduction by sporogony occurs in bread mould Fungus