The size of the electric current in a electrical conductor is a function of which of the following?
a. conductor cross sectional area
c. density of charge carriers
b. velocity of charge carriers
d. All of these choices are valid.
D
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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?
Red giant stars are I. more luminous than the Sun. II. larger in diameter than the Sun. III. cooler than B stars. IV. located above the main-sequence stars in the H-R diagram
a. I & II b. II & IV c. I, II, & IV d. II, III, & IV e. I, II, III, & IV
If originally there were X atoms of radioactive isotope present and now there are only X/4 atoms, how many half-lives have elapsed?
A) 1 B) 4 C) 2 D) 3
Draw a schematic (not to scale) of the Milky Way Galaxy face on so that you see the spiral arms. Label the spiral arms. Now draw a schematic (not to scale) of the Milky Way Galaxy edge-on, and locate and label the disk
What will be an ideal response?