Answer
given,
high temperature reservoir (T_c)= 464 K
efficiency of reservoir (ε)= 25 %
temperature to decrease = ?
increase in efficiency = 42 %
now, using equation
T_C = 348 K
now,
if the efficiency is equal to 42$ = 0.42
PLEASE HELP ASAP!!!!!!!!!!!!!!!!!!
1 answer:
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Answer:
The correct option is;
C. 40 N
Explanation:
Given that the rock is on the ground, we have;
The weight of the rock, = 40 N ↓
From Newton's third law of motion, we have that action and reaction are equal and opposite,
Therefore, given that the weight of the rock exerts a force of 40 N on the ground, and the rock is stable and stationery on the ground, then the ground is reacting to the weight of the rock with an equal force of 40 N, acting in opposite direction to the weight of the block to balance the weight of the rock and create equilibrium such that the net force acting on the rock is zero
∑F = = 0
Where;
= The reaction of the ground
We have;
+
= 40 +
= 0
= 0 - 40 = -40
= -40 N ↓
∴ = 40 N ↑.
Answer:
α
b)t = 2619.8 years
c) T(i) = 0.0208536s
Explanation:
Given that ,
The period of pulsar T = 0.033 s
The period increase at a rate of = 1.26×10⁻⁵s/y
a) Pulsar angular speed is
ω = θ / T = 2π / T
θ = one revolution of pulsar
T = period of pulsar
Pulsar angular acceleration is given by
b) ω₀ = θ / T
0 = 190.4 - 2.303 × 10⁻⁹
c) 2018 - 1054
= 964years
The pulsar is originated in a supernova explosion 964 years ago.
then the initial period of pulsar
T(i) = 0.0208536s