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)
30 km/h
50 km/h
80 km/h
40 km/h
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.
Within minutes of Big Bang, hydrogen gas was formed by a percentage of ...........%
75
50
100
25
A train moves at a speed (100 km/h), then it cover a distance of (40 km) within time .......... hours.
0.6
0.3
0.5
0.4
The focal length of a lens It is the distance between the principal Focus and the optical centre of the lens .
True
False
In Milky Way galaxy, the old stars (the older) gather in the….. of the galaxy.
Centre
end
north
Sudden violent nuclear reactions occur within the star which led to its explosion
The optical piece which forms laterally inverted (reversed) image and equal to the body is .......
plane mirror
convex lens
concave lens
spherical mirror
Reproduction by sporogony occurs in bread mould Fungus
Mass is considered from… … physical quantity
Scalar
physical
standard
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.....
8
24
16
32
A moving car covers a distance of (.........) through (150 min.), then its speed is 80 km/h
400 kilometer
200 kilometer
100 kilometer
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
10 Sec
20 Sec
15 Sec
A mirror, always forms a diminished image for the object.
Concave mirror
Convex mirror