An object is placed 15cm in front of a concave mirror of focal length 20cm. The image formed is
real, inverted and diminished
real, inverted and magnified
virtual, erect and diminished
virtual, erect and magnified
virtual, inverted and magnified
Correct answer is D
No explanation has been provided for this answer.
N9.70
N11.70
N12.40
N15.90
N17.60
Correct answer is B
No explanation has been provided for this answer.
When water is heated between 0°C and 4°C, it's density
increases for a while and then decreases
decreases for a while and then increases
increases
decreases
remains constant.
Correct answer is A
No explanation has been provided for this answer.
6.0mm
18.0mm
30.0mm
60.0mm
120.0mm
Correct answer is C
No explanation has been provided for this answer.
The speed of sound travelling in various media increases in the order:
air, iron bar, water
air, water, iron bar
iron, bar water, air
water, air, iron bar
water, iron bar, air
Correct answer is B
No explanation has been provided for this answer.