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2 years ago

A passive instrument performs which of the following tasks?

Engineering

1 answer:

tester [92]2 years ago

7 0

Q1/A:-Determine Vo if VR2> VRI , VD = 0.

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What is the atmospheric temperature on Venus if the density is 67 kg/m^3 and the pressure is 9.3 mPa, absolute? Express in °C an

swat32

Answer:

461 C

862 F

Explanation:

The specific gas constant for CO2 is

R = 189 J/(kg*K)

Using the gas state equation:

p * v = R * T

T = p * v / R

v = 1/δ

T = p / (R * δ)

T = 9.3*10^6 / (189 * 67) = 734 K

734 - 273 = 461 C

461 C = 862 F

4 0

2 years ago

What is -4 (negative 4) in a 2's complement of 8 bits?

Pachacha [2.7K]

Answer: Yes

Explanation: -4 x 2 = 8

5 0

2 years ago

g Water is being heated in a closed pan on top of a range while being stirred by a paddle wheel. During the process, 30 kJ of he

AVprozaik [17]

Answer:

38kJ

Explanation:

Final Energy= Total Energy at the beginning + Total energy added - energy lost

Final Energy = 12.5 + 500/1000 + 30- 5

= 38kJ

8 0

3 years ago

A cylindrical riser is to be designed for a sand casting mold. The length of the cylinder is to be 1.5 times its diameter. The c

ollegr [7]

Answer:

d = 2.711

H = 4.06 inch

Explanation:

Given Data:

length = 1.5 times of diameter of cylinder

square plate side = 12 inch, thickness = 1.1 inch

mold constant = 13.0 min/in^2

Casting volume

$V= tl^2$

t is thickness and L is length

substitute t = 1.1 inch, L =12 inch

$v = 1.1\times 12^2 = 158.4 inc^3$

casting area

$A = 2L^2 + 4Lt$

$A = 2\times 12^2 + 4\times 12\times 1.1$

A = 340.8 in^2

Ratio between casting volume and area

$\frac{v}{A} = {158.4}{340.8} = 0.464$

Total solidification time TST using chvorinov rule

$TST = Cm [\frac{V}{A}]^2$

Cm is mold constant

$TST = 13\times 0.464^2$ [/tex]

TST = 2.798 min

TST for riser

riser $TST = 1.30\times2.798 = 3.63$

Riser volume $v = \frac{\piD^2 H}{4}$

$v = 0.25\pi\times D^2(1.5D)$

$v = 0.375\pi D^3$

Riser area

$A =\frac{2\pi D^2}{4} + \pi DH$

$A = 0.5\pi D^2 +1.5\pi D^2$

$A = 2\pi D^2$

RATIO of riser volume and area

$\frac{v}{A} = \frac{0.375\piD^3}{2.0\pi D^2} = 0.1875 D$

TST for riser

$TST = Cm [\frac{v}{A}]^2[tex]TST= 13 \times (0.1875 D)^2$

$3.36 =13\times (0.1875 D)^2$

d = 2.711

$H = 1.5 \times 2.711 =4.06 inc$

H = 4.06 inch

3 0

2 years ago

"The transistor base-emitter voltage (VBE) a. increases with an increase in temperature. b. is not affected by temperature chang

mash [69]

Answer:

C) Decreases with an increase in temperature

Explanation:

As the temperature of a transistor increases, the thermal runaway property of the transistor becomes more significant and the transistors, conducting more freely as a result of the rise in temperature, causes an increase in the collector current or leakage current. The transistor base-emitter voltage decreases as a result.

With increased heating due to heavy current flow, the transistor is damaged.

7 0

2 years ago