Answer:
the third statement is true
Explanation:
given data
Lenovos cost more than Dells
Lenovos cost less than Apples
solution
we have given 1st statement that is express as
cost (Lenovo) > cost (Dell) ..................1
and
2nd statement that is express as
cost (Lenovo) < cost (Apple)
so we can say it as
cost (Apple) > cost (Lenovo) ......................2
and
now above Both equation 1 and 2 can be written as
cost (Apple) > cost (Lenovo) > cost (Dell) .........................3
so we can say cost of Apples is more than the cost of Lenovos and the cost of Dells
so as that given 3rd statement is true
Given:
max displacement, A = 3.2 m
f= 50 Hz
at t = 0, displacement, d = 150 cm = 1.5 m
Solution:
Displacement in the general form is represented by:
d = Asin(ωt ± α)
d = 3.2sin(2πft ± α)
d = 3.2sin(100πt ± α)
where,
A = 3.2 m,
ω = 2πf = 100π
Now,
at t = 0,
1.5 = 3.2sin(100π(0) ± α )
1.5 = 3.2sinα
sin α = = 0.4687
α = = 27.95° = 0.488 radian
Now, we can express displacement in the form of 'Asin(wt + α)' as:
d = 3.2sin(100πt ± 0.488 )
Answer: (a) 0,142 (b) 52.99 (c) 2.83 (d) 88.26
Explanation:
If the refrigarating capacity is 150kw
(a) the mass flow rate of refrigerant, in kilograms per second is 0.142
(b) the power input to the compressor, in kilowatts is 52.99
(c) the coefficient of performance is 2.83
(d) the isentropic compressor efficiency is 68.6 per cent
Answer:
The size of the ampere was chosen for convenience and compatibility with Mass Kilogram and Seconds system of units
Explanation:
The ampere which is the unit of electric current is an indication of the quantity of electric charges flowing in an electric circuit per unit time
The unit of the flowing charges measured in ampere is the coulomb
1 coulomb = 6.241 × 10¹⁸ unit of charges
Therefore;
1 unit of electric charge = 1.602 × 10⁻¹⁹ C
Hence;
1 A = 1 C/s
Before 2019 the ampere was defined as the current that will produce a force of 2 × 10⁻⁷N/m between two parallel and straight that are separated 1 meter apart
The size of the ampere was chosen so that the size of the base unit of the ampere in the Mass, Kilogram, Second, (MKS)system would be appropriate.
<u>Explanation:</u>
<em>Remember, </em>to say a product is incorporated with aesthetic design implies that its overall appearance is designed to look beautiful to the eyes of the user/buyer. For example, a clothing company whose target market is mainly focused on women's clothing<u> would need to take into consideration that certain colors like pink, blue, etc are attractive to women more than men.</u> So they'll have to ensure the colors of their clothing are suitable to the needs of their target market.
The Universal Design process involves building products that can be used by a wide range of users at ease. For example, you may ask yourself: Is my product/service easily accesible to those with disabilities?
Other processes include;
- Defining who the users (or universe) are of the products.
- Involve consumers in the design.
- Follow the existing standards of product design
- Evaluate and review your universal design methods