I think that mechanism is called a <em>"lens turret"</em>.
Answer:
18 degrees celcius = 64.4
Explanation:
Fahrenheit
When Venus put in a different battery with higher voltage ... no matter
what other components were in the circuit ... the voltage across the
light bulb, and the current through it, both had to increase, and the
light bulb had to shine brighter than before.
Answer:

Explanation:
Given that


Emissivity of surfaces(∈) = 1
We know that heat transfer between two surfaces due to radiation ,when both surfaces are black bodies

So now by putting the values



So rate of heat transfer per unit area

Answer:
Sound will travel the slowest in Air
Explanation:
The higher the m/s is, the faster the sound travels