The spacing of the molecules enables sound to travel much faster through a solid than a gas.
The answer is b electromagnetic energy.
Explanation:
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Answer: T = 5068 s
Explanation:
Given
Radius of the earth, r = 6378.1 km
Centripetal acceleration, g = 9.81 m/s²
Period of rotation, T = ?
a = w²r, where
a is the centripetal acceleration
w is the angular velocity
r is the radius
9.81 = w² * 6378.1*10^3
w² = 9.81 / 6378.1*10^3
w² = 1.538*10^-6
w = 1.24*10^-3 rad/s
To get the period of the earth, we use the formula
w = 2π / T, so that
T = 2π / w
T = (2 * 3.142) / 1.24*10^-3
T = 6.284 / 1.24*10^-3
T = 5067.74 s
Therefore, the earth would rotate at a period of 5068 s or 1 hour and 24 minutes
Answer:
v = ω R
number of seconds in 24 hrs = 24 * 3600 = 86400 s / da = T (period)
f = 1 / T
ω = 2 Π f = 2 Π / T = 2 Π / 86400
v = 2 Π / 8.64E4 * 6.0E6 = 436 m / s
Check:
S = 2 Π * 6.0E6 = 3.77E7 m/da
S / T = 3.77E7 m/da / 8.64E4 s/da = 436 m / s