* separate keywords with comma
Top Websites Physics 1-15:
1.
roblox.com 
16,875,000

2.
academia.edu 
492,401

3.
nature.com 
436,775

4.
iop.org 
258,208

5.
astrophysics.gsfc.nasa.gov 
211,777

6.
phys.org 
193,433

7.
uoguelph.ca 
150,488

8.
sciencealert.com 
146,792

9.
quia.com 
128,347

10.
cern.ch 
127,932

11.
physicsclassroom.com 
120,643

12.
newscientist.com 
111,386

13.
nap.edu 
108,952

14.
nobelprize.org 
70,100

15.
reallusion.com 
60,027

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