LordBooming
24.05.2020 •
Physics
Which best describes the direction of heat?
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Ответ:
D.
Explanation:
Heat always flows from hot to cold
Ответ:
Velocity
v= i + 2 j
Acceleration
a= 2 j
Explanation:
Given that
r(t) = t i + t² j + 3 k
We know that
Velocity v given as
v= dr/dt
dr/dt= i + 2 t j +0
v= i + 2 t j
At t= 1
v= i + 2 x 1 j
v= i + 2 j
Acceleration ,a
a= dv/dt
v= i + 2 t j
dv/dt= 2 j
a= 2 j