____ is the point in Earth's orbit where Earth is closest to the Sun
a. Aphelion
b. Perihelion
c. Precession
d. The winter solstice
e. a and d
b
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The longer the wavelength, the bluer and brighter the star appears
a. True b. False Indicate whether the statement is true or false
Energy and Mass: Consider a student whose mass is 70 kg. If all his mass were converted to electrical energy, for how many years could he keep a 100-W light bulb burning? (c = 3.0 × 108 m/s)
What will be an ideal response?
The 4d subshell field can contain how many electrons?
A) 7 B) 14 C) 4 D) 10 E) 2
A car travels in a flat circle of radius R. At a certain instant the velocity of the car is 24 m/s west, and the acceleration of the car has components of 2.4 m/s2 east and 1.8 m/s2 south. What is the radius of the circle?
a. 0.24 km b. 0.19 km c. 0.32 km d. 0.14 km e. 0.27 km