D. gravitational force. is your answer hope this helps
Answer:
so, net force acting on the object is 121.2 Newton.
Explanation:
net force acting on it =
gravitational force acting on it - air resistance.
so, gravitational force ( g ) = mass × acceleration
( 9.8 is acceleration due to gravity )
force acting due to air resistance = 137.2 - 16
Answer:
a) Qh= 6750 kJ
b) e = 0.296
c) = 390.625° C
Explanation:
Given:
Work done, W = 2000 kJ
Heat flow, Q = 4750 kJ
Temperature at which heat flows out, = 275° C
a) Now, the heat flow through the engine (Qh)
Qh = W + Q
or
Qh = 2000 + 4750
or
Qh= 6750 kJ
b) The efficiency (e) is given as:
on substituting the values, we get
or
e = 0.296
c)
where,
is the temperature at which heat flow
on substituting the values, we get
or
= 390.625° C
The Sun is the world's main source of energy. Without it we would not be able to live.
It’s called the epicenter