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4 years ago

When voltage sources are connected in series, the total voltage is equal to the algebraic sum of the individual voltages?

1 answer:

7 0

According to the third rule of series circuit, the total voltage is equal to the sum of individual voltages. These proves that the statement above "<span>When voltage sources are connected in series, the total voltage is equal to the algebraic sum of the individual voltages?" is TRUE.</span>

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When a red giant dies, before it becomes a WHITE DWARF (small, dim, hot star) that eventually becomes a BLACK DWARF (remnant, da

vagabundo [1.1K]

some massive black dwarfs may eventually produce <u>supernova explosions. </u>These will occur if pycnonuclear (density-based) fusion processes much of the star to iron, which would lower the Chandrasekhar limit for some black dwarfs below their actual mass.

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3 years ago

A closed system contains 30g of gas. How much heat(in joules) is added to or rejected by the system to produce 5000 N-m of work

finlep [7]

Answer : The heat rejected by the system is 1000 J

Explanation :

As per first law of thermodynamic,

$q=\Delta U+w$

where,

$\Delta U$ = internal energy of the system

q = heat added or rejected by the system

w = work done of the system

First we have to determine the internal energy for 30 grams of gas.

As, 1 gram of gas has internal energy = 200 J

So, 30 grams of gas has internal energy = 200 × 30 = 6000 J

Now we have to determine the heat of the system.

$q=\Delta U+w$

$\Delta$ = -6000 J

w = 5000 N.m = 5000 J

Now put all the given values in the above formula, we get:

$q=-6000J+5000J$

$q=-1000J$

The negative sign indicate that the heat rejected by the system.

Hence, the heat rejected by the system is 1000 J

8 0

3 years ago

At one point in the rescue operation, breakdown vehicle A is exerting a force of 4000 N and breakdown vehicle B is exerting a fo

lukranit [14]

Answer:

1.) Magnitude = 5596 N

2.) Direction = 60 degrees

Explanation: You are given that the breakdown vehicle A is exerting a force of 4000 N at angle 45 degree to the vertical and breakdown vehicle B is exerting a force of 2000 N

Let us resolve the two forces into X and Y component

Sum of the forces in the X - component will be 4000 × cos 45 = 2828.43 N

Sum of the forces in the Y - component will be 2000 + ( 4000 × sin 45 )

= 2000 + 2828.43

= 4828.43 N

The resultant force R will be

R = sqrt ( X^2 + Y^2 )

Substitutes the forces at X component and Y component into the formula

R = sqrt ( 2828.43^2 + 4828.43^2 )

R = sqrt ( 31313752.53 )

R = 5595.87 N

The direction will be

Tan Ø = Y/X

Substitute Y and X into the formula

Tan Ø = 4828.43 / 2828.43

Tan Ø = 1.707106

Ø = tan^-1( 1.707106 )

Ø = 59.64 degree

Therefore, approximately, the magnitude and direction of the resultant force on the truck are 5596 N and 60 degree respectively.

8 0

4 years ago

a vehicle travels north 200mi, then south 155, then North 25.0mi in 40 hr. what is the magnitude for it's average velocity

Triss [41]

Answer:

Explanation ok this is confusing i just did so much math and now im confused-

6 0

3 years ago

Change in momentum is equal to force times the amount of time the force is applied? True or False?

harina [27]

The answer to this question is false

7 0

3 years ago