As an element is a pure substance which contains only one kind of atoms ,so nitrogen -N2,contains only one kind of atom which is nitrogen of two atoms. And compound is also a pure substance which contains two or more kind of atoms. ... So,nitrogen is an element not an compound.
1. When an object is moving away from us, the light from the object is known as redshift, and when an object is moving towards us, the light from the object is known as blueshift.
2. A wavelength increases in size, and its frequency, and energy decrease.
3. The frequency of a wave increases, and its wavelength decreases.
Redshift is an important term for astronomers. The term can be taken literally. The wavelengths of light are stretched and perceived as shifting toward the red portion of the spectrum. The same thing happens to sound waves when the source moves relative to the observer.
As the wave frequency decreases, the wavelength increases as long as the wave velocity remains constant. If the wave speed stays the same as the frequency decreases, it means that fewer wave peaks or troughs pass through a given point in a given time period. The number of complete wavelengths in a given unit of time is called frequency. Frequency and energy decrease with increasing wavelength.
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Answer:
1.65 × 10⁻⁴ m
Explanation:
Displacement amplitude = A = Δ P / 2πf ρv
= ( 3.92 × 10³) / 2π (9.2 × 10³) (1.20)(343)
= 1.65 × 10⁻⁴ m
Displacement amplitude is the distance traveled by the wave particle from its equilibrium position.
By energy conservation we will say
as we know that
also we have
now we will have
Answer:
d) the amount of work is the same whether the bag is moved all at once or in two stages, provided the total height lifted is the same in either case.
Explanation:
While moving the bag to the shelf in one shot we can say that the total work done is given as
here we know that
2H = total height raised by the bag
now when we raise the bag to first shelf and then move it to next shelf
then we will have
so the correct answer will be
d) the amount of work is the same whether the bag is moved all at once or in two stages, provided the total height lifted is the same in either case.