All categories

3 years ago

_____ are used to control the flow of electricity in a circuit.

Engineering

2 answers:

Travka [436]3 years ago

8 0

Answer:

Switches control the flow of electricity in a circuit.

Cloud [144]3 years ago

5 0

Answer:

switches

Explanation:

switches because it a device used to control electric circuit regarding whether current should flow or not.

You might be interested in

On the first statistics exam, the coefficient of determination between the hours studied and the grade earned was 80%. The stand

True [87]

Answer:

$\left[\begin{array}{ccccc}&DF&SS&MS&F\\Regression&1&7200&7200&72\\Error&18&1800&100\\total&19&900\end{array}\right]$

Explanation:

Sample size, n=20

Degrees of freedom is 1

Number of degrees of freedom for error is n-2 hence 20-2=18

Total number of degrees of freedom is 18+1=19

Standard error estimate is $s_{y-x}=\sqrt {\frac {SSE}{n-2}}$

Here, $SSE=(n-2)s_{y-x}^{2}=(20-2)(10)^{2}=1800$

Coefficient of determination $r^{2}=\frac {SSE}{SS total}$

Here, $SSR=r^{2}(SSR+SSE)$

$SSR=\frac {r^{2}}{1-r^{2}} SSE=\frac {0.8}{1-0.8}(1800)=7200$

The total sum of squares is

SS total=SSR+SSE=7200+1800=9000

MSR=SSR=7200

$MSE=\frac {SSE}{n-2}=\frac {1800}{20-2}=100$

F value is given by

$F=\frac {MSR}{MSE}=\frac {7200}{100}=100$

The ANOVA table is then

$\left[\begin{array}{ccccc}&DF&SS&MS&F\\Regression&1&7200&7200&72\\Error&18&1800&100\\total&19&900\end{array}\right]$

4 0

4 years ago

A(n) ___ is an electric device that uses electromagnetism to change (step up or step down) AC voltage from one level to another.

Pie

Answer:

A transformer is an electric device that uses electromagnetism to change voltage from one level to another or to isolate one voltage from another.

7 0

3 years ago

A 0.4-W cylindrical electronic component with diameter 0.3 cm and length 1.8 cm and mounted on a circuit board is cooled by air

Katyanochek1 [597]

Answer:

The surface temperature of the component 54.6 degrees celsius.

Explanation:

Please see attachment.

7 0

3 years ago

34. What does the D stand for in the EVADE acronym?

rewona [7]

Answer:

Even

Vicious

Animal

Die

Equally

Explanation: im jk... but its "Designate and enforce scene control zones"

3 0

4 years ago

Two parallel surfaces move in opposite directions relative to each other at a velocity of 64 in/sec and are separated by a gap o

Illusion [34]

Answer:

$\mu$ = 2.6906 × $10^{-3}$ lb-s/in²

Explanation:

given data

velocity V = 64 in/sec

separated by a gap x = 0.41 in

relative motion by shear stress $\tau$ = 0.42 lb/in²

solution

we know that shear stress is directly proportional to rate of change of velocity as per newton's law of viscosity.

$\tau = \mu \times \frac{du}{dy}$ ....................1

so here $\mu$ coefficient of dynamic viscosity and $\frac{du}{dy}$ is velocity gradient

and

$\tau = \mu \times \frac{v1 - v2 }{h2-h0}$

put here value and we get

0.42 = $\mu \times \frac{64}{0.41}$

$\mu$ = 2.6906 × $10^{-3}$ lb-s/in²

4 0

3 years ago