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Anestetic [448]

3 years ago

5

Changing the speed of a synchronous generator changes A) the frequency and amplitude of the output voltage. B) only the frequenc

y of the output voltage. C) only the amplitude of the output voltage. D) only the phase of the output voltage.

1 answer:

Dmitrij [34]3 years ago

8 0

Answer:

A) the frequency and amplitude of the output voltag

Explanation:

Changing the speed of a synchronous generator changes both the output voltage (amplitude of the wave) and frequency as they tend to increase.

Changing the speed regulator will change the engine throttle setting to maintain the speed.

While the power, torque, current, fuel flow rate and torque angle will have decreased.

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What is the number “4” in SiCl4? a subscript a coefficient a product a reactant

Svetlanka [38]

Answer: 4 is the subscript in $SiCl_{4}$ .

Explanation:

We know that,

Subscript: The number of atom present in a given compound.

In $SiCl_{4}$ , 4 represents the number of chlorine atom in 1 mole of Silicon tetra chloride.

Coefficient: Number of atom which is used in reaction.

For example: In $3SiCl_{4}$ , 3 is the coefficient of silicon tetra chloride.

A Product : In the balance equation, right hand side is called product.

A reactant : In the balance equation, left hand side is called reactant.

For example: the balance equation is

$2Mg+O_{2}\rightarrow 2MgO$

In this equation, $2Mg+O_{2}$ is the reactants and $2MgO$ is products.

Hence, 4 is the subscript in $SiCl_{4}$ .

4 0

3 years ago

Read 2 more answers

A small metal bar whose initial temperature was 20 degrees Celsius is dropped into a large container of boiling water. How long

Vesnalui [34]

Below is the answer. I hope it help.
T ( t ) = C e k t + T m where Tm is the temperature of the surroundings
T ( t ) = C e k t + T m
T ( 0 ) = 20
T ( 1 ) = T ( 0 ) + 2 = 22
C + T m = 20 C+Tm=20
C e k + T m = 22

4 0

2 years ago

Lonnie pitches a baseball of mass 0.500 kg. The ball arrives at home plate with a speed of 35.0 m/s and is batted straight back

Andreyy89

Answer:

Explanation:

The impulse equation is

Δp = FΔt, where Δp = final momentum - initial momentum, F is the Force exerted on an object, and Δt is the change in time. In this equation,the entire right side defines the impulse. In other words, FΔt is the impulse; thus the change in momentum an object experiences is due to its change in impulse and is directly proportional to it.

Therefore, once we find the change in momentum, that is the impulse the object experiences. Δp = final momentum - initial momentum, where

p = mv and p is momentum.

$p_f=(.500)(50.0)$ so

$p_f=25.0$ and

$p_i=(.500)(35.0)$ so

$p_i=17.5$ ; therefore,

Δp = 25.0 - 17.5 = 7.5 $\frac{kg*m}{s}$ which is the unit for momentum

7 0

2 years ago

What is the correct answer?

alina1380 [7]

Answer:

4

Explanation:

I added all of them and them minus the 5.

8 0

2 years ago

A mass m hangs from string wrapped around a pulley of radius R. The pulley has a moment of inertia I, and its pivot is frictionl

Semmy [17]

Answer:B

Explanation:

Given

radius of Pulley is r

Pulley has a moment of inertia is I

Suppose mass is falling with an acceleration a and T be the Tension in string

$mg-T=ma$

$T=m(g-a)$

And $I\times \alpha =T\times R$

$I\times \frac{a}{R}=T\times R$

$I\times \frac{a}{R}=m(g-a)\times R$

$I=\frac{mR^2(g-a)}{a}$

and Torque is $I\alpha$

$\tau =\frac{mR^2(g-a)}{a}\times \alpha$

$\tau =\frac{mR^2(g-a)}{a}\times \frac{a}{R}$

$\tau =mR(g-a)$

Which is less than $mgR$

8 0

3 years ago