<u>Answer</u>
1) A. 96 Candelas
2) A. Both of these types of lenses have the ability to produce upright images.
3) C. 5 meters
<u>Explanation</u>
Q1
The formula for calculation the luminous intensity is;
Luminous intensity = illuminance × square radius
Lv = Ev × r²
= 6 × 4²
= 6 × 16
= 96 Candelabra
Q2
For converging lenses, an upright image is formed when the object is between the lens and the principal focus while a diverging lens always forms and upright image.
A. Both of these types of lenses have the ability to produce upright images.
Q3
Luminous intensity = illuminance × square radius
square radius = Luminous intensity/ illuminance
r² = 100/4
= 25
r = √25
= 5 m
The formula for final velocity is Speed= distance/time (s=d/t)
Velocity is another word for speed.
Answer:
It should be option B polarization
Answer:
65 m/s
Explanation:
The motion of the supply along the horizontal direction is a uniform motion with constant speed. Therefore, its horizontal velocity is given by
where
d is the distance travelled horizontally
t is the time taken
In this problem, d = 650 m and t = 10 s, so if we apply the formula we get
Answer:
v' = -2.5 cm/s
Explanation:
given,
mass of toy car, m = 10 g
speed of right, u= 20 cm/s
mass of toy car, M = 24 g
speed opposite, u' = 35 cm/s
after collision
10 g car moves to left, v = 58 cm/s
v' = ?
using conservation of momentum
m u + M u' = m v + M v'
10 x 20 - 24 x 35 = - 10 x 58 + 24 x v'
24 x v' = -60
v' = -2.5 cm/s
speed of second car after collision = -2.5 cm/s