When did Ptolemy live?

A) about 5000 years ago
B) about 100 years ago
C) about 1000 years ago
D) about 2000 years ago
E) about 500 years ago


D

Physics & Space Science

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The density of a ___________ is greater than the density of a ___________

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Which of the following temperature scales has the smallest unit interval?

a. Celsius b. Kelvin c. Fahrenheit d. None of these

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Magnetic Moment: A flat coil containing 25 identical loops carries 6.4 A of current. When it is placed in a uniform magnetic field of 0.22 T that is oriented parallel to the plane of the coil, the magnetic torque on it is 3.7 N ? m.(a) What is the magnetic moment of the coil?(b) What is the area of each loop?

What will be an ideal response?

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A 5-g coin is dropped from a 300-m building. If it reaches a terminal velocity of 45 m/s, and the rest of the energy is converted to heating the coin, what is the change in temperature (in °C) of the coin? (The specific heat of copper is 387 J/kg/°C.)

a. 9 b. 2 c. 5 d. 21 e. 0.5

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