If a certain object emits visible waves rather than infrared waves its temperature is
A) higher.
B) lower.
C) the same, temperature doesn't make any difference.
Answer: A
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Edwin Hubble and Milton Humason discovered that there was a linear relationship between a galaxy's ____
a. rotation curve and distance b. mass and luminosity c. age and distance d. apparent recession velocity and distance e. mass and recession velocity
Is dark matter important in other galaxies and galactic clusters?
What will be an ideal response?
Two square air-filled parallel plates that are initially uncharged are separated by 1.2 mm, and each of them has an area of 190 mm2
How much charge must be transferred from one plate to the other if 1.1 nJ of energy are to be stored in the plates? (?00 = 8.85 × 10-12 C2/N • m2) A) 56 pC B) 39 pC C) 78 pC D) 3.5 µC
An ideal solenoid of radius a has n turns per unit length and current I. The magnetic flux ?B through any circular area of radius a inside the solenoid, centered on and perpendicular to the solenoid axis, is
a.
.
b.
