The main ingredients of most satellites of the jovian planets are

a. rock and metal.
b. hydrogen compound ices.
c. hydrogen and helium.


Ans: c. Hydrogen compound ices.

Physics & Space Science

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The ionic compound made of Fe3+ and CO32- ions would have the formula

a. Fe3(CO3)2. b. FeCO3. c. Fe2(CO3)3. d. none of these

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A pole-vaulter clears 5.00 m. With what speed does he strike the mat in the landing area?

a. 2.70 m/s c. 10.8 m/s b. 9.90 m/s d. 21.6 m/s

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If the dielectric breakdown field in air is 3 × 10^6 V/m, what potential difference is involved with a 3 cm spark?

a. 1.0 × 10^8 V c. 9 × 10^4 V b. 9 × 10^6 V d. 1.0 × 10^10 V

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