When measuring air temperature, it is best to avoid
a. shade.
b. shadows.
c. direct sunlight.
d. none of these.
c
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__________is a graph of orbital velocity versus radius in the disk of a galaxy
A) A rotation curve B) A normal distribution C) The H-R diagram D) The light curve
The intrinsic brightness of a star is referred to as its
A) radiance B) luminosity C) surface temperature D) apparent brightness
The time P required for a spring-mass system to complete one full oscillation can be expressed in terms of the attached mass m and the spring constant of the spring k in the form P = kmbkc, where k, b, and c are dimensionless constants
What must be the values of b and c? The dimensions of k are [M]/[T]2.
The electron in a doubly ionized lithium atom experiences a weaker attractive force than the single electron in a hydrogen atom
Indicate whether the statement is true or false