melissacornut
07.10.2019 •
Social Studies
Select the correct answer. which statement is true? a. political philosophy does not change. b. the philosophy of politics is not important. c. politics and philosophy do not have common goals. d. political philosophy creates changes in governmental structures.
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Ответ:
D
Explanation:
Political philosophy creates changes in governmental structures.
Ответ:
a=2500J,b=1000K,c=1000J,d=14.142m/s
Explanation:
V²=U²+2gh
V²=0 + 2×10×10=200m/s
a).kinetic energy=(1/2)mv²=(1/2)25×200=2500
potential energy=mgh
p.e=25×10×10=2500J
pe+ke=2500+2500=5KJ
b).mgh=25×10×4=1000J
c). V²=U²+2gh
V²=0+2×10×4
V²=80
kinetic energy=(1/2)mv²
=(1/2)25×80
=1KJ
d). From my first paragraph V²=200
V=√200
V=14.142m/s