Answer:
64.5 cm
Explanation:
30 * 80 + x * 110 = 50* 190 => x = 64.5
Answer
A. the work done on the refrigerant in each cycle is 105kJ
B the coefficient of performance of the refrigerator is 4.8
Explanation
Given data
Work done at high temperature T2 Qh=610kJ
Work done at low temperature T1 Ql=505kJ
We know that the net work done by the refrigerator is expressed as
Wnet= Qh-Ql
=610-505
=105kJ
Also we know that the coefficient of performance is expressed as
COP= Ql/Wnet
COP= 505/105
= 4.8
-1^10
centi=10 mm and mm=1/10=10^-1 cm
Answer:
1.4×10⁵ N
Explanation:
Find the acceleration.
Given:
v₀ = -1000 m/s
v = 0 m/s
t = 120 s
Find: a
v = at + v₀
(0 m/s) = a (120 s) + (-1000 m/s)
a = 8.33 m/s²
Find the force.
∑F = ma
F − mg = ma
F = mg + ma
F = m (g + a)
F = (75600 / 9.8) (9.8 + 8.33)
F = 1.4×10⁵ N
To solve this problem we will apply the linear motion kinematic equations. With the information provided we will calculate the time it takes for the object to fall. From that time, considering that the ascent rate is constant, we will take the reference distance and calculate the distance traveled while the object hit the ground, that is,
Then the total distance traveled would be
Therefore the railing will be at a height of 77.7m when it has touched the ground