Answer: highly bouncy chick unchain Vicki bunch
Explanation:
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Since the mirror is plane, the image will be formed behind the mirror. The distance will be the same as that of the distance of the object from the mirror and the height will just be the same.
So, Ruff's image will be 3 m behind the mirror and 50 cm tall.
Answer: The question is incomplete because the options are not given here are the options gotten from Another website.
A. Ultraviolet light detects the presence of radioactive substances.
B.Ultraviolet light shows cold areas as blue and warm areas as red.
C.Ultraviolet light causes substances to fluoresce and give off visible light.
D. Ultraviolet light transmits information to AM and FM radio receivers.
The correct option is C.
Ultraviolet light causes substances to fluoresce and give off visible light
Explanation:
This is because UV light radiates at a very short wavelengths compared to visible light which is impossible for humans to see it. Therefore , when UV light is absorbed by some particular materials, it reflect back towards the eye as visible radiation with a longer wavelength .This process is called UV-induced visible fluorescence.
Answer:
The required mass of ice is 12.5 kg.
Explanation:
Mass of hot tea,
= 1.8 kg
Initial temperature of hot tea = 80°C = 353 K
Initial temperature of ice = 0.00°C = 273 K
Final temperature of mixture = 10°C = 283 K
Heat of fusion of ice, L = 334 kJ/kg
Specific heat capacity of tea,
= Specific heat capacity of water = 4190 J/kg/K
Heat lost tea = Heat gained by ice

Δ
=
L + 
Δ

Δ
=
(L +
Δ
)
1.8 x 4190 x (353 - 283) =
(334 + (4190 x (283 - 2730))
1.8 x 4190 x 70 =
(334 + (4190 x 10))
527940 = 42234
= 
= 12.5004
= 12.5 kg
The required mass of ice is 12.5 kg.
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