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3 years ago

Evaluate 5p to the power of 3 when p = -2

Mathematics

2 answers:

Mrac [35]3 years ago

7 0

5(-2)^3 5(-2) is -10 to the power of 3 is -1000

kumpel [21]3 years ago

5 0

5(p)^-2

5(-2)^3

5(-8)

-40

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segment BC is an are of a circle with radius 30.0 cm, and point P is at the center of curvature of the arc Segment DA is an arc

Elan Coil [88]

Answer:

The magnetic field is $B = 3.87 *10^{-6} \ T$

Direction is inward

Step-by-step explanation:

The diagram for this question is shown on the first uploaded image

From the question we are told that

The radius of BC is $r_{BC} = 30 \ cm = 0.30 \ m$

The radius of DA is $r _{DA} = 20 \ cm = 0.20 \ m$

The length of CD is $r_{CD} = 10 cm = 0.1 \ m$

The length of AB is $r_{AB} = 10 cm = 0.1 \ m$

The current is $I = 11.4A$

The magnetic field is mathematically represented as

$B = B_{BC} + B_{DA} + B_{CD} + B_{AB}$

$B = \frac{\mu_o I}{4 \pi } [ \frac{\theta_{DA}}{r_{DA}} + \frac{\theta_{BC}}{r_{BC}}+ \frac{\theta_{CD}}{r_{CD}}+\frac{\theta_{AB}}{r_{AB}}]$

Where

$\theta_{BC} = \theta_{DA} = \frac{2\pi}{3}$

Where $\frac{2 \pi}{3} = 120^o$

$\theta_{CD} = \theta_{AB} = 0^o$

$B = \frac{\mu_o I}{4 \pi } [ \frac{\frac{2\pi}{3} }{0.20} - \frac{\frac{2\pi}{3}}{0.30}}+ \frac{0}{0.10}+\frac{0}{0.10}]$

$B = 3.87 *10^{-6} \ T$

The direction is into the page

This because the magnitude of the magnetic field due to arc BC whose direction is outward is less than that of DA whose direction is inward

This is because according to Fleming's Left Hand Rule the direction of current is perpendicular to the direction of magnetic field so since current in arc BC and DA are moving in opposite direction their magnetic field will also be moving in opposite direction

3 0

3 years ago

The ratio of girls to boys in a classroom is 5 to 4.how many girls are in the class if there is a total of 27 students

statuscvo [17]

5 girls : 4 boys
5 + 4 = 9 students

= 27 students ( 5girls / 9 students )
*cancel students units*
= 27 ( 5 girls / 9)
= 15 girls

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3 years ago

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sdas [7]

Answer:

Step-by-step explanation:

if x=5 then,

y=-6×1+11

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The expected value of profit

Mashutka [201]

Sorry but I’m just commenting because apparently you have to answer other people’s questions in order to ask questions even when you have Brainley plus ugh

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2 years ago

Solve for the value of x

elixir [45]

Answer:

x = -5

Step-by-step explanation:

These are alternate exterior angles and alternate exterior angles are equal

110 = x+115

Subtract 115 from each side

110-115 = x+115-155

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3 years ago

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