How many images of a candle will be formed if it is placed between two plane mirrors inclined at an angle of 45?
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A candle placed between two plane mirrors inclined at an angle of 45 degrees will form 7 images. This is due to multiple reflections between the mirrors. The number of images depends on the angle between the mirrors.
In physics, when a candle is placed between two plane mirrors inclined at an angle of 45 degrees, 7 images will be formed. This happens due to multiple reflections between the mirrors. As per the formula for number of images n = 360/θ - 1, where θ is the angle between the mirrors, for an angle of 45 degrees, we get n = 360/45 - 1 = 7. The actual number of images can be less than this if they overlap each other.
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Related Questions
At room temperature, none of the metals area. soft. b. liquids. c. malleable. d. gases.
. As the elements in Period 3 are considered in order of increasing atomic number, there is a general decrease inatomic massatomic radiuselectronegativityfirst ionization energy
What was the minimum temperature to the nearest degree for the thermometer shown here? / a. +16ºC b. +4ºC c. -13ºC d. -6ºC
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transporting the glucose made during photosynthesis to the roots and
stems.
Phloem
Xylem } Vascular
stem
τρος
Xylem
Phloem
Which function is xylem specifically adapted to perform in plants?
(7.12A)
A
It helps prevent wer loss
B
It transports water from the roots to the leaves
с
It exchanges gases with the atmosphere
D
It captures sunlight for photosynthesis
Answers
Answer:
B
Explanation:
it transports water from roots to the leafs
B) The reaction cannot occur because water is reactant.
C) Silver has a higher activity than hydrogen and cannot replace it.
D) Silver has a lower activity than hydrogen and cannot replace it.
Answers
Answer:
D - Silver has lower reactivity than hydrogen and cannot replace it
Explanation:
If we assume , Ag also reacts just like other metals as
Metal + H₂O ---> Metal Hydroxide + H₂
then Ag forms as
Ag + H2O ----->AgOH + H2
here Ag is converting into Ag⁺ and 2H⁺ are converting into H₂
for reaction Ag --->Ag⁺ + e⁻ E° = -0.799 V
for reaction H⁺ + e⁻ ---->H₂ E° = 0 V
by Adding those 2 above equations net E° will be -0.799 which is negative.As per Faradays Law
ΔG° = -nFE°
here we got E° as negative then ΔG° will be positive
As per thermodynamics if ΔG° is +ve then reaction is not feasible
so, then given reaction does not occur.....
Answer:
Silver has lower reactivity than hydrogen and cannot replace it
Explanation:
took test
Answers
Half-life is the time required for the amount of a sample to half its value.
To calculate the fraction of the sample remained unchanged, we will use the following formulas:
1.
where:
n - a number of half-lives
x - a remained fraction of a sample
2.
where:
t - total time elapsed
n - a number of half-lives
The half-life of N-16 is 7.13.
So, we know:
t = 28.8 s
We need:
n = ?
x = ?
We could first use the second equation, to calculate n:
If:
Then:
⇒
⇒
⇒ n ≈ 4
Now we can use the first equation to calculate the remained amount of the sample.
⇒
⇒
If the fraction of the sample is 1/16 = 6.25%, then the mass of the sample could be calculated as:
x g : 6.25% = 60 g : 100%
x =
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increases.
(b) The water molecules decompose into hydrogen and oxygen molecules.
(c) The water molecules return to the surface as fast as they leave.
(d) The water vapour molecules have greater kinetic energy than the liquid water
molecules.
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