.

Reference: Ref 5-1

The substance is entirely a solid between points ______________ and ______________.

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A, B

Physics & Space Science

A toy rocket, weighing 10. N, blasts off from ground level. At the exact top of its trajectory, its energy is 140. J. To what vertical height does it rise?

A) 1.4 m B) 14. m C) 12. m D) 0.12 km E) 1.4 km

You are holding on to one end of a long string that is fastened to a rigid steel light pole. After producing a wave pulse that was 5 mm high and 4 cm wide, you want to produce a pulse that is 4 cm wide but 7 mm high. You must move your hand up and down once,

a. the same distance up as before, but take a shorter time. b. the same distance up as before, but take a longer time. c. a smaller distance up, but take a shorter time. d. a greater distance up, but take a longer time. e. a greater distance up, but take the same time.

The lower edge of the main-sequence band is known as ________ and represents the location in the H-R diagram at which stars begin their lives as main-sequence stars

a. the Coulomb barrier b. hydrostatic equilibrium c. the birth line d. the zero-age main sequence e. the evolutionary track

Exhibit 5-2

A 4.00-kg block is suspended from the roof of an elevator. A 2.00-kg block is suspended from the 4.00-kg block. The tensions in strings 1 and 2 are labeled and . ? ? Use this exhibit to answer the following question(s). Refer to . When the elevator accelerates downwards with an acceleration of 2.20 m/s2, the magnitudes of and  are A. 30.4 N; 15.2 N. B. 39.2 N; 19.6 N. C. 45.6 N; 15.2 N. D. 48.0 N; 24.0 N. E. 72.0 N; 24.0 N.