7 plus itself 4 times is 4 sevens aka 4*7
could alsto be 28
Answer:
They land at the same time.
Explanation:
Two masses falling through a vacuum (no air resistance or buoyancy forces) will accelerate at the same rate when dropped from the same height. Therefore, despite having different masses, they land at the same time.
Answer:

Explanation:
When light passes through a narrow slit, it produces a diffraction pattern on a distant screen, consisting of several bright fringes (constructive interference) alternated with dark fringes (destructive interference).
The formula to calculate the position of the m-th maximum in the diffraction pattern produced in the screen is:

where
y is the distance of the m-th maximum from the central maximum (m = 0)
is the wavelength of light used
D is the distance of the screen from the slit
d is the width of the slit
In this problem, we have:
is the wavelength
D = 62.5 cm = 0.625 m is the distance of the screen
We know that the distance between the third order maximum (m=3) and the central maximum is 1.35 cm (0.0135 m), which means that

For
m = 3
Therefore, rearranging the equation for d, we find the width of the slit:

Folded mountains occur when the rocks push against each other.