Answer:
The part of the system that is considered the resistance force is;
B
Explanation:
The simple machine is a system of pulley that has two pulleys
The effort, which is the input force at A gives the value of the tension at C and D which are used to lift the load B
Therefore, we have;
A = C = D
B = C + D = C + C = 2·C
∴ C = B/2
We have;
C = B/2 = A
Therefore, with the pulley only a force, A equivalent to half the weight, B, of the load is required to lift the load, B
The resistance force is the constant force in the system that that requires an input force to overcome in order for work to be done
It is the force acting to oppose the sum of the other forces system, such as a force acting in opposition to an input force
Therefore, the resistance force is the load force, B, for which the input force, A, is required in order for the load to be lifted.
Answer:
(a)
( ∃x ∈ Q) ( x > √2)
There exists a rational number x such that x > √2.
( ∀x ∈ Q) ( ( x ≤ √2)
For each rational number x, x ≤ √2.
(b)
(∀x ∈ Q)(x² - 2 ≠ 0).
For all rational numbers x, x² - 2 ≠ 0
( ∃x ∈ Q ) ( x² - 2 = 0 )
There exists a rational number x such that x² - 2 = 0
(c)
(∀x ∈ Z)(x is even or x is odd).
For each integer x, x is even or x is odd.
( ∃x ∈ Z ) (x is odd and x is even)
There exists an integer x such that x is odd and x is even.
(d)
( ∃x ∈ Q) ( √2 < x < √3 )
There exists a rational number x such that √2 < x < √3
(∀x ∈ Q) ( x ≤ √2 or x ≥ √3 )
For all rational numbers x, x ≤ √2 or x ≥ √3.
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Answer:
The maximum power dissipation of the zener diode 112mV.
Explanation:
The minimum zener current should be:
5 * Iza= 5 * 1= 5 mA.
Since the load current can be at maximum 15 mA, we should select R so that, IL= 15 mA.
A zener current of 5 mA is available, Thus the current should be 20 mA, which leads to,
R = 
= 470 Ω.
Maximum power dissipated in the diode occours when, IL=0 is
Pmax = 20 * 
* 5.6 = 112mV.
Answer:
See attached document for complete answers and also follow the step by step explanation to get given parameters
Explanation:
Given that:
In a tempering process, glass plate, which is initially at a uniform temperature Ti, is cooled by suddenly reducing the temperature of both surfaces to Ts. The plate is 10 mm thick, and the glass has a thermal diffusivity of 6 × 10−7 m2/s. (a) How long will it take for the midplane temperature to achieve 75% of its maximum possible temperature reduction? (b) If (Ti − Ts) = 300°C, what is the maximum temperature gradient in the glass at the time calculated in part (a)? (c) Plot the temperature distribution within the glass plate at t = 10s
