Which of the following is the largest distance?
A) diameter of a typical galaxy
B) diameter of Pluto's orbit
C) distance to the nearest star (other than our Sun)
D) 1 light-year
A) diameter of a typical galaxy
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The ____________________ of a radioactive substance is the amount of time for the substance to be reduced by half
Fill in the blank(s) with correct word
The observed amount of difference between the perihelion of Earth in early January and aphelion in early July results in the northern hemisphere being _____
a. cold in January and hot in July b. hot in January and cold in July c. equally cold in both January and July d. equally hot in bot January and July e. Wrong! The seasonal differences in northern hemisphere temperatures is not caused by differences in distance from the Sun.
What does 4 × 10^-12 times 3 × 10^-8 divided by 2 × 10^24 equal?
If you wanted to know how much the temperature of a particular piece of material would rise when a known amount of heat was added to it, which of the following quantities would be most helpful to know?
A) initial temperature B) specific heat C) density D) coefficient of linear expansion E) thermal conductivity