Why AA batteries run exactly 1.5V?
Answers
They don't.
Just for you, I pulled seven (7) AA cells out of a fresh pack from the
store, taped them down to my desk, collected a few other things,
and made these measurements:
AA Cell Open at 25 mA Calc int R, Ω
#1 1.596 1.546 3.285
#2 1.601 1.551 3.285
#3 1.598 1.539 3.876
#4 1.578 1.548 1.971
#5 1.600 1.539 4.008
#6 1.598 1.526 4.730
#7 1.600 1.547 3.482
The (open/unloaded) voltage of the cell is determined by
the cell's "chemistry" ... the actual chemicals and metals
it's constructed from ... that undergo the chemical reaction
to deliver current between the terminals when a conductor
is connected there.
-- The variation in voltage among these 7 cells is about 1.44% .
-- The variation in the internal resistance of these cells ... an
indication of how much current (amps) a cell can deliver ...
varies over a range of almost 140% . I am surprised.
This electronics tip has to deal with checking common alkaline AA/AAA batteriesor AA/AAA rechargeable batteries for proper voltage with a voltmeter.
Disclaimer : some people might say that a battery should always be tested underload but I have found that in most common household applications this isinsignificant and will not change the results of the testing too much.
Related Questions
A kangaroo hops at an angle of 25° to the horizontal with a velocity of 20 m/s. What is the vertical component of the velocity? A. 8.5 m/s B. 12.5 m/s C. 18 m/s D. 20 m/s
Which of the following graphs shows the relationship between two variables that obey the inverse square law?
Why is an objects density expressed as a combination of two units
The lowest point of a wave is its breaker trough crest swell
Answers
Answer:
The acceleration of the object is 0.5 m/s²
a is correct.
Explanation:
Given that,
Mass of object = 5.0 kg
Acceleration
Using newton's second law
The force is the product of the mass of the object and acceleration.
Put the value of m and a
Now, The same force would give a 20 kg object
So, Using newton's second law again
The acceleration is
Put the value of m and F
Hence, The acceleration of the object is 0.5 m/s²
Answers
7.5E14 x wavelength = 300,000 m/s
Wavelength in meters = 300,000 divided by 7.5E14
Final answer:
Violet light frequency is 7.5 x 10^14 hertz. As according to the relation between light's speed, frequency and wavelength, λ = c / f, the wavelength of violet light can be found to be approximately 400 nanometers.
Explanation:
The relationship between frequency (f), wavelength (λ), and the speed of light (c) is expressed by the equation c = fλ. Given the speed of light c is approximately 3.00 × 10⁸ meters per second (m/s) and the frequency of violet light f is given as 7.5 × 10¹⁴ hertz (Hz), we can solve for wavelength λ. Rearranging the equation gives us λ = c / f. Substituting the given values we find that λ = (3.00 × 10⁸ m/s) / (7.5 × 10¹⁴ Hz), which computes to approximately 400 nanometers (nm). This result corroborates that violet light is typically within the range of 380 - 450 nm, thus confirming its position at the high-frequency, short-wavelength end of the visible light spectrum.
Learn more about Visible Light Wavelength here:
#SPJ2
A. where oceanic crust slides under continental crust.
O
B. in the middle of continents.
O
c. where two continental plates spread apart.
D. on the edges of the Atlantic plate,
Answers
Answer:
A is right
Explanation:
Answers
IF all 4 pieces are the same length, then she ends up
in exactly the same place where she started, and her
displacement for the complete square walk is zero.
Answers
The net requirement is zero.
(in any direction)
Answers
Answer:
true
Explanation:
Answer:
This answer is True