Position of Image strictly depends on position of Object, so you get the light of ray from object then it strikes the surface of convex lens, which usually forms in front of the lens means the nature of Image is "Real" in most of the case of Convex lens
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Answer:
15.63m/s
Explanation:
Velocity = displacement/time
Given
Distance = 125 meters
Time = 8 secs
Therefore,
V = 125/8
V = 15.63 m/s
The velocity of the pulse wave is 15.63m/s
Answer:
B 2m\s
Explanation:
18 m of displacement over the course of 9 seconds
18/9 = 2 m\s
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Answer:
correct option is c. 31.0°C
Explanation:
given data
copper of mass = 100 g
electric drill = 1/2"
power = 40.0 W
time = 30 s
C copper = 387 J/kgC
to find out
copper's increase in temperature
solution
we get here energy that is express a s
energy = 40 W × 30 s
energy = 1200 Watt seconds
and heat acquired by drill is here as
heat acquired = 100 × T × 387
here temperature rise in copper mass as
temperature rise in copper mass = × T × 387
temperature rise in copper mass = 38.7 × T Watt second
we know that all the energy from the drill heats the copper
so we can say
38.7 × T = 1200
T = 31°C
so correct option is c. 31.0°C