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2 years ago

How do devices that store information such as solid-state or magnetic drives work?

Engineering

1 answer:

AURORKA [14]2 years ago

4 0

Answer:

solid state storage devices, such as solid state drives and USB memory sticks Data is stored in binary form on secondary storage devices. Magnetic devices Magnetic devices such as hard disk drives use magnetic fields to magnetise tiny individual sections of a metal spinning disk. Each tiny section represents one bit.

Explanation:

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Drag the tiles to the correct boxes to complete the pairs.

Jobisdone [24]

Answer:

Check image, right on PLATO

3 0

3 years ago

Which of the following is a possible unit of ultimate tensile strength?

levacccp [35]

Answer:

Newton per square meter (N/m2)

Explanation:

Required

Unit of ultimate tensile strength

Ultimate tensile strength (U) is calculated using:

$U = \frac{Ultimate\ Force}{Area}$

The units of force is N (Newton) and the unit of Area is m^2

So, we have:

$U = \frac{N}{m^2}$

$U = N/m^2$

<em>Hence: (c) is correct</em>

4 0

3 years ago

Design a half-wave recti er which provides a peak voltage of 15 V, and anaverage voltage of 3.8 V when driven by a 120 V (rms) a

nirvana33 [79]

Answer:

You need a 120V to 24V commercial transformer (transformer 1:5), a 100 ohms resistance, a 1.5 K ohms resistance and a diode with a minimum forward current of 20 mA (could be 1N4148)

Step by step design:

Because you have a 120V AC voltage supply you need an efficient way to reduce that voltage as much as possible before passing to the rectifier, for that I recommend a standard 120V to 24V transformer. 120 Vrms = 85 V and 24 Vrms = 17V = Vin
Because 17V is not 15V you still need a voltage divider to step down that voltage, for that we use R1 = 100Ω and R2 = 1.3KΩ. You need to remember that more than 1 V is going to be in the diode, so for our calculation we need to consider it. Vf = (V*R2)/(R1+R2), V = Vin - 1 = 17-1 = 16V and Vf = 15, Choosing a fix resistance R1 = 100Ω and solving the equation we find R2 = 1.5KΩ
Finally to select the diode you need to calculate two times the maximum current and that would be the forward current (If) of your diode. Imax = Vf/R2 = 10mA and If = 2*Imax = 20mA

Our circuit meet the average voltage (Va) specification:

Va = (15)/(pi) = 4.77V considering the diode voltage or 3.77V without considering it

6 0

4 years ago

The speed of a vehicle is reduced with a constant acceleration from 72km/h to 18

Radda [10]

Answer:

The correct answer will be "1477.84 N".

Explanation:

Given that,

Mass,

m = 1.6 mg

or,

= 1600 kg

Initial velocity,

u = 72 km/h

= $72\times \frac{5}{18} \ m/s$

= $20 \ m/s$

Final velocity,

v = 18 km/h

= $18\times \frac{5}{18}$

= $5 \ m/s$

Covered distance,

s = 250 m

By using the below relation, we get

⇒ $v^2=u^2+2as$

On putting the values, we get

⇒ $(5)^2=(20)^2+2\times a\times 250$

⇒ $a=-0.75 \ m/s^2$ (shows the deceleration)

Slope will be given as 1 in 25, then

⇒ $Sin \theta=\frac{1}{25}$

$\theta=2.3^{\circ}$

hence,

As we know,

⇒ $\Sigma F=ma$

or,

⇒ $Braking \ force+350-mgSin\theta=ma$

⇒ $Braking \ force=ma+mgSin\theta-350$

On substituting all the values, we get

⇒ $=1600(0.75+1600\times 9.81 Sin(2.3^{\circ})-350$

⇒ $=1477.84 \ N$

7 0

3 years ago

The ABC Corporation manufactures and sells two products: T1 and T2. 20XX budget for the company is given below:

Sliva [168]

Answer:

The ABC Corporation

a) Total Expected Revenue (in dollars) for 20XX:

Revenue from T1 = 60,000 x $165 = $26,400,000

Revenue from T2 = 40,000 x $250 = $10,000,000

Total Revenue from T1 and T2 = $36,400,000

b) Production Level (in units) for T1 and T2

T1 T2

Total Units sold 160,000 40,000

Add Closing Inventory 25,000 9,000

Units Available for sale 185,000 49,000

less opening inventory 20,000 8,000

Production Level 165,000 units 41,000 units

c) Total Direct Material Purchases (in dollars):

Cost of direct materials used T1 T2

A: (165,000 x 4 x $12) $7,920,000 $2,460,000 (41,000 x 5 x $12)

B: (165,000 x 2 x $5) 1,650,000 615,000 (41,000 x 3 x $5)

C: 0 123,000 (41,000 x 1 x$3)

Total cost $9,570,000 $3,198,000 Total = $12,768,000

Cost of direct per unit = $58 ($9,570,000/165,000) for T1 and $78 ($3,198,000/41,000) for T2

Cost of direct materials used for production $12,768,000

Cost of closing direct materials:

A (36,000 x $12) $432,000

B (32,000 x $5) 160,000

C (7,000 x $3) 21,000 $613,000

Cost of direct materials available for prodn $13,381,000

Less cost of beginning direct materials:

A (32,000 x $12) $384,000

B (29,000 x $5) 145,000

C (6,000 x $3) 18,000 $547,000

Cost of direct materials purchases $12,834,000

d) The Total Direct Manufacturing Labor Cost (in dollars):

T1 T2

Direct labor per unit 2 hours 3 hours

Direct labor rate per hour $12 $16

Direct labor cost per unit $24 $48

Production level 165,000 units 41,000 units

Labor Cost ($) $3,960,000 $1,968,000

Total labor cost $5,928,000 ($3,960,000 + $1,968,000)

e) Total Overhead cost (in dollars):

Overhead rate = $20 per labor hour

Overhead cost per unit: T1 = $40 ($20 x 2) and T2 = $60 ($20 x 3)

T1 overhead = $20 x 2 x 165,000) = $6,600,000

T2 overhead = $20 x 3 x 41,000) = $2,460,000

Total Overhead cost = $9,060,000

Cost of goods produced:

Cost of opening inventory of materials = $547,000

Purchases of directials materials 12,834,000

less closing inventory of materials = $613,000

Cost of materials used for production 12,768,000

add Labor cost 5,928,000

add Overhead cost 9,060,000

Total production cost $27,756,000

f) Total cost of goods sold (in dollars):

Cost of opening inventory = $3,928,000

Total Production cost = $27,756,000

Cost of goods available for sale $31,684,000

Less cost of closing inventory $4,724,000

Total cost of goods sold $26,960,000

g) Total expected operating income (in dollars)

Sales Revenue: T1 and T2 $36,400,000

Cost of goods sold 26,960,000

Gross profit $9,440,000

less marketing & distribution 400,000

Total Expected Operating Income = $9,040,000

Explanation:

a) Cost of beginning inventory of finished goods:

T1, (Direct materials + Labor + Overhead) X inventory units =

T1 = 20,000 x ($58 + 24 + 40) = $2,440,000

T2 = 8,000 ($78 + 48 + 60) = $1,488,000

Total cost of beginning inventory = $3,928,000

b) Cost of closing Inventory of finished goods:

T1 = 25,000 x ($58 + 24 + 40) = $3,050,000

T2 = 9,000 ($78 + 48 + 60) = $1,674,000

Total cost of closing inventory = $4,724,000

5 0

4 years ago