In an ideal transformer, how many turns are necessary in a 110-V primary if the 24-V secondary has 100 turns?

A) 458
B) 240
C) 110
D) 22


A

Physics & Space Science

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Which of the following can be considered a near Earth object?

A) An asteroid orbiting at a distance of 0.1 AU from the Sun B) An asteroid orbiting at a distance of 0.5 AU from the Sun C) An asteroid orbiting at a distance of 1.01 AU from the Sun D) An asteroid orbiting at a distance of 2.01 AU from the Sun

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If the terrestrial planets were formed by homogeneous accretion, then

a. they were initially molten forming an iron core first, then they accreted a silicate crust later. b. they were initially molten forming a silicate core first, then they accreted an iron crust later. c. they were initially collections of solid particles which melted then differentiated into a high-density iron metal core and low-density silicate crust. d. they were initially collections of solid particles which melted then differentiated into a high-density silicate core and low-density iron metal crust.

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Violent impacts of infalling particles release energy called ____________

Fill in the blank(s) with correct word

Physics & Space Science

If the sum of the forces exerted on a 4.5-kg tool accelerates it at 40 m/s2, what acceleration would that same sum of the forces give to an 18-kg tool?

A) 180 m/s2 B) 10 m/s2 C) 160 m/s2 D) 9.8 m/s2 E) 32 m/s2

Physics & Space Science