List I | List II | ||
A. | Troposphere | I. | Approximate 65-75 km over Earth’s surface |
B. | E- Part of Stratosphere | II. | Approximate 300 km over Earth’s surface |
C. | F2- Part of Thermosphere | III. | Approximate 10 km over Earth’s surface |
D. | D- Part of Stratosphere | IV. | Approximate 100 km over Earth’s surface |
For each layer of Earth's atmosphere, the typical altitudes are as follows:
Troposphere: The troposphere extends up to approximately 10 km, so the correct match is \( A \rightarrow III \).
E-Part of Stratosphere: This part of the stratosphere reaches up to about 50 km. Considering the general range, the match is \( B \rightarrow IV \).
F\(_2\)-Part of Thermosphere: The F\(_2\)-layer of the thermosphere can extend as high as 300 km, resulting in the match \( C \rightarrow II \).
D-Part of Stratosphere: The D-part of the stratosphere reaches about 50 km, so the match is \( D \rightarrow I \).
A particle is projected at an angle of \( 30^\circ \) from horizontal at a speed of 60 m/s. The height traversed by the particle in the first second is \( h_0 \) and height traversed in the last second, before it reaches the maximum height, is \( h_1 \). The ratio \( \frac{h_0}{h_1} \) is __________. [Take \( g = 10 \, \text{m/s}^2 \)]
In mechanics, the universal force of attraction acting between all matter is known as Gravity, also called gravitation, . It is the weakest known force in nature.
According to Newton’s law of gravitation, “Every particle in the universe attracts every other particle with a force whose magnitude is,
On combining equations (1) and (2) we get,
F ∝ M1M2/r2
F = G × [M1M2]/r2 . . . . (7)
Or, f(r) = GM1M2/r2
The dimension formula of G is [M-1L3T-2].