Pumice is a lightweight rock that sometimes forms when lava is very rich in volcanic glass.
<u>Explanation:</u>
Pumice is a lightweight rock formed after cooling of lava erupted from the volcano. These rocks are composed of minerals which are present in deep underground of volcano which after eruption in high temperature and pressure comes out as lava.
As time goes the lava will get cooled down and form rocks which can be classified as igneous rocks. One of the rocks formed from lava are termed as Pumice.
False because the first law of motion is the crash I think I’m in middle school
Answer:
frequency = 0.5 Hz and speed = 2 m/s
Explanation:
Given that,
The period of a wave, T = 2 s
Wavelength, 
If f be the frequency. So,
f = 1/T
Speed of a wave is given by :
So, the frequency of the wave is 0.5 Hz and speed is 2 m/s.
Answer:
43.83 nC
Explanation:
We know Q = ε₀Ψ where Q = charge enclosed by the cubic box, ε₀ = permittivity of free space = 8.854 × 10⁻¹² F/m and Ψ = net electric flux through cubic box = 4950 Nm²/C
So, substituting the values of the variables into the equation, we have
Q = ε₀Ψ
= 8.854 × 10⁻¹² F/m × 4950 Nm²/C
= 43827.3 × 10⁻¹² C = 4.38273 × 10⁻⁸ C
= 43.8273 × 10⁻⁹ C
= 43.8273 nC
≅ 43.83 nC
