False
Explanation:
The Unit of Frequency is Hertz (Hz)
Frequency in layman’s language can be said as a number of times a particular event repeat itself in unit time.
E.g. Supposing a hypothetical situation in which a boy cracks 5 nuts every minute, then his frequency can be said to be 5 nuts /min
However, in physical dimensions, the frequency is always calculated in terms of a second (as a measure of unit time).
Hence the Standard unit (SI)of Frequency is named after German origin physicist Heinrich Hertz. In simple terms, 1 Hertz denotes the event repeats itself one time per second and in physics domain one cycle per second.
Answer:
Technician B
Explanation:
There's no such thing as a perfect filter available to block any kind of toxic fumes. The effectiveness of a filter depends of various things, such as the air flow and the particles size. They have specific rates depending on the place they are designed to be installed on, so they have to be chosen with that in mind. For example, most industrial applications have more demanding restrinctions than a commercial one, so a filter designed for the latter would probably not be useful for the first case.
Answer:
Answer: Say the big boy is 40kg and the small boy is 20kg... ... ...then by the rule that moments around a fulcrum or pivot should be equal for equilibrium, the distance of big boy from pivot=half of dist of small boy from pivot
From the ohms law, the current through a conductor is directly proportional to the potential difference. Thus we get the equation I = V/R
where I is the current in Ampheres, V is the voltage in volts and R is the resistance in Ohms.
Hence; I = 3/12
= 0.25 Ampheres
Thus, the current through the flashlight is 0.25 Ampheres
Answer:
r = 1.45 Å
Explanation:
given,
λ = 1.436 Å
θ = 20.62°
d = a
n = 2
metal gold crystallizes in a face centered cubic unit cell
Radius of the gold atom = ?
using Bragg's Law
n λ = 2 d sin θ
2 x 1.436 Å = 2 a sin 20.62°
a = 4.077 Å
We know relation of radius for face centered cubic unit cell
r = 1.45 Å
the radius of a(n) gold atom. is equal to 1.45 Å