The equator has approximately ______________ hours of daylight every day of the year

Fill in the blank(s) with correct word


12

Physics & Space Science

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An airplane moves 140 m/s as it travels around a vertical circular loop which has a 1.0-km radius. What is the magnitude of the resultant force on the 70-kg pilot of this plane at the bottom of this loop?

a. 2.1 kN b. 1.4 kN c. 0.69 kN d. 1.5 kN e. 1.3 kN

Physics & Space Science

A derived unit

a. involves only length. b. is a combination of units. c. applies only to density. d. is not found in the metric system.

Physics & Space Science

A bird can safely land on a bare high voltage power line because

A. If both feet are touching the bare wire, they are at the same potential – and therefore no current can flow between the feet and through the bird’s body B. Its internal resistance is very high, so very little current will flow C. The line cannot deliver enough current to harm it D. Its feet are good insulators, and therefore it is protected

Physics & Space Science

Earth's projected orbit on the sky is called the _____________

Fill in the blank(s) with correct word

Physics & Space Science