Answer:
Concentric circles
Explanation:
Concentric circles are two or more circles which have the same center point. The region between two concentric circles is called an annulus.
no artical shoul be used here
Answer:
Power needed to pump=4.79 KW.
Explanation:
Given that:
We know that coefficient of performance of heat pump
COP=
So COP=
COP=10.43
COP=
10.43 =
=4.79 KW
So power needed to pump=4.79 KW.
Acceleration of Car = 10 ms⁻²
Explanation:
Step 1:
The basic formula of acceleration is a = (v-u)/t ms⁻²
where, v- final velocity
u- initial velocity
t= time taken
Step 2:
Here v = 70 ms⁻¹
u = 50 ms⁻¹
t = 5 s
∴ a = ( 70 - 20)/5
a = 10 ms⁻²
