Saturn's rings are thick, perhaps a few thousand kilometers

Indicate whether the statement is true or false


FALSE

Physics & Space Science

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Angela claims that she wears a cylindrical-shaped hollow gold bracelet because it expands less than a solid one with a change in temperature. Clarissa claims that a cylindrical-shaped solid gold bracelet expands less than a hollow one. Which one, if either, is correct?

a. Angela, because the bracelet expands outward on its outer surface and inward on its inner surface. b. Clarissa, because the bracelet expands outward on its outer surface and inward on its inner surface. c. Angela, because the inner circumference does not change, but the outer circumference expands. d. Clarissa, because the inner circumference does not change, but the outer circumference expands. e. Neither, because both the inner and outer circumferences increase in length.

Physics & Space Science

Two long straight parallel wires separated by a distance of 20 cm carry currents of 30 A and 40 A in opposite directions. What is the magnitude of the resulting magnetic field at a point that is 15 cm from the wire carrying the 30-A current and 25 cm from the other wire?

a. 51 ?T b. 33 ?T c. 72 ?T d. 64 ?T e. 46 ?T

Physics & Space Science

The main practical problem associated with building an interstellar ramjet is

A) making the ship large enough to scoop up enough hydrogen fuel given that the density of hydrogen in space is so low B) producing enough thrust to accelerate the spacecraft to a high enough speed C) separating the matter and antimatter fuels from each other D) receiving enough photon energy to propel the craft

Physics & Space Science

Density: A plastic block of dimensions 2.00 cm × 3.00 cm × 4.00 cm has a mass of 30.0 g. What is its density?

A. 0.80 g/cm3 B. 1.20 g/cm3 C. 1.25 g/cm3 D. 1.60 g/cm3

Physics & Space Science