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3 years ago

What must be done to the wires used to make an electromagnet before they connect

Mathematics

2 answers:

CaHeK987 [17]3 years ago

4 0

Step-by-step explanation:

To create a simple electromagnet, you'll need a source of electricity, a conductor, and metal. Wrap insulated copper wire tightly around an iron screw or nail before connecting the wire to a battery, and watch as your new electromagnet picks up small metal objects.

Likurg_2 [28]3 years ago

3 0

Answer:it’s D

Step-by-step explanation: Ape.x

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Can somebody help please

Anastaziya [24]

9)
0.1 = 10^-1
0.01 = 10^-2
0.001 = 10^-3
0.000001 = 10^-6
Each time the point goes one number backward, it make 10^-1. This means that if the point goes 2 numbers backward, it's *10^-2, etc...

10) an atom is 0.0000000001 meter. You can see that from 1, the point has went 10 times backward. So 0.0000000001 is 10^-10 meters.

11) Multiplying exponents that have the same base is equal to that same base with the add of the exponents:

2^(-3) * 2^(-4) = 2^(-3-4) = 2^(-7)
s^(-5) * s^(-2) = s^(-5-2) = s^(-7)
y^(-1) * y^4 = y^(-1+4) = y^3
3a * a^-3 = 3a^(1-3) = 3a^(-2)

Dividing is exponents with the same base is equal to the same base with the subtraction of the exponents:

3^(-1) / 3^(-5) = 3^(-1-(-5)) = 3^(-1+5) = 3^4
a^(-4) / a^(-6) = a^(-4+6) = a^2
y^(-6) / y^(-10) = y(-6+10) = y^4
z^(-4) / z^(-8) = z^(-4+8) = z^4

Hope this Helps! :)

4 0

3 years ago

Annie and Rich watch a movie. When they start the movie, the time is 2:23 pm. When the movie ends, the time is 3:58 pm. How long

e-lub [12.9K]

Answer:

1 hour and 35 minutes!! :)

Step-by-step explanation:

7 0

3 years ago

Among many other pieces of information, the U.S. Census Bureau records the race or ethnicity of the residents of every county in

hram777 [196]

Answer:

The diversity index is 0.335 or 33.5%

Step-by-step explanation:

Probability index= probability that two people chosen at random are different ethnicity or races.

Let the probability of picking black = p(B) =0.15

probability of picking white= p(W)= 0.8

probability of picking Asian= p(A)=0.05

The probability of picking two people who are of different races or ethnicity can be gotten as:

Probability of picking: (White & Black) OR (White & Asian) OR (Black &Asian) OR (black &white) OR (Asian&white) OR (Asian& Black).

Using the notations given earlier, we can write the diversity index as:

Diversity index=p(W) x p(B)+ p(W) x p(A)+ p(B) x p(A) +p(B) x p(W)+ p(A) x p(W)+ p(A) x p(B)

Fixing the values for each term in the last expression gives:

Diversity index= 0.8x0.15 +0.8x0.05+ 0.15x0.05 +0.15x0.8+ 0.05x0.8+0.05x0.15

Diversity index= 0.12+0.04+0.0075+ 0.12+0.04+0.0075

Diversity index= 0.335 or 33.5%

Hence the diversity index is 0.335 or 33.5%

3 0

4 years ago

Which relation is NOT a function? please help!! thank youu

jeka57 [31]

Answer:

The fourth one

Step-by-step explanation:

it can't have the same x value numbers

5 0

3 years ago

A quadratic function has its vertex at the point (6,10). The function passes through the point (7, – 4).

andrew11 [14]

Answer:

Quadratic coefficient = -14, linear coefficient = 168, constant term = -494

Step-by-step explanation:

Its easiest to first start out with a vertex form equation because it can then be converted to a standard quadratic.

given a vertex at (6,10) , and point of intersection at (7,-4), the equation can be set up like this:

y = a(x-6)^2+10, because we know h and k from the vertex.

We also know y and x from the given point of intersection so a can be solved.

-4 = a(7-6)^2+10

-4 = a + 10

-4-10 = a

a = -14 which is also known as the quadratic coefficient because it is part of a second degree quantity and a Trionomial as a whole(quadratic).

since all the variables are known, you can

expand the equation and set it to standard form

y = -14(x-6)^2+10

y = -14(x^2-12x+36)+10

y = -14x^2+168x-504+10

y = -14x^2+168x-494

For reference, the standard form equation is ax^2+bx+c where a is the quadratic coefficient, b is the linear coefficient, and c is the constant coefficient.

In this instance, -14x^2+168x-494 = ax^2+bx+c

8 0

3 years ago