What is the approximate density of the Sun's core?
A. 16 g/cm3
B. 160 g/cm3
C. 1.6 g/cm3
D. 1600 g/cm3
Answer: B
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At what distance from the central axis of a long straight thin wire carrying a current of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength of the Earth's magnetic field of about 5.0 × 10-5 T? (?0 = 4? × 10-7 T ? m/A)
A) 1.0 cm B) 2.0 cm C) 3.0 cm D) 4.0 cm E) 5.0 cm
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
The frequency of a flood event and its magnitude is known as
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Syrup having density of 1000 kg/m^3 and viscosity of 1250 cP flows through a deep trough at 10 m/s. Determine the Reynolds number at a distance 2 m downstream from the entrance. Is the flow in the boundary layer laminar or turbulent?
What will be an ideal response?