Answers edited by Ed Hitchcock
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How strong is the force of gravity on earth?

How many grams are in 5.67 ng?

What are the receiving chambers of the heart and what are the discharging chambers?

Question #5ced9

How do you find the maximum area of rectangle with 80ft perimeter?

How powerful are today's telescopes compared to some of the first used to look at the heavens?

What is #(pi)/4 # radians in degrees?

Given that y varies directly with x, and x = 15, y = 9, how do you write a direct variation equation that relates x and y?

Question #88ca9

What is a planetary nebula made of?

What makes a nebula planetary and what makes a nebula diffuse? Is there any way to tell if they are Diffuse or Planetary just by looking at a picture? What are some Diffuse Nebulae? What are some Planetary Nebulae?

Question #3cc11

What percent of 33.5 is 21?

Question #28721

Why does earth's distance from the sun change?

Question #a52b1