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3 years ago

Which of these correlation numbers shows the strongest relationship? +.46 +.32 -0.41 -0.68

1 answer:

6 0

Answer: -0.068

Explanation:
A familiar correlation number of R² denotes the degree of correlation between measured data and the curve of best fir
R² = 1 denotes a perfect fit, so that
R = +1, or R = -1 denotes a perfect fit.
R² = 0 denotes no correlation.

To compare the given correlation numbers, we should consider their absolute values. In decreasing order, they are
-0068 => 0.68
0.46 => 0.46
-0.041 => 0.41
0.32 => 0.32

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Which relations below regarding magnetic field and electric field lines are true? 1. Magnetic field lines never begin nor end bu

Vlad1618 [11]

Answer:

Options 1 and 5 are correct

Explanation:

Magnetic field lines can never cross, the field is unique at any point in space. Magnetic field lines are continuous, forming closed loops without beginning or end. They go from the north pole to the south pole.

Magnetic field lines form closed loops but do not intersect.

Electric field lines originate at the positive charges and terminate at the negative charges. They move in a straight line and are parallel. Electric field lines neither form closed loops nor intersect.

Since, magnetic field lines form closed loops and move from North to South pole, they come out of north poles outside the magnet and into north poles inside the magnet, they also go into south poles outside the magnet and out of south poles inside the magnet.

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4 years ago

In a charging process, 4 × 1013 electrons are removed from one small metal sphere and placed on a second identical sphere. Initi

Alina [70]

Answer:

The distance between the two spheres is 914.41 X 10³ m

Explanation:

Given;

4 X 10¹³ electrons, and its equivalent in coulomb's is calculated as follows;

1 e = 1.602 X 10⁻¹⁹ C

4 X 10¹³ e = 4 X 10¹³ X 1.602 X 10⁻¹⁹ C = 6.408 X 10⁻⁶ C

V = Ed

where;

V is the electrical potential energy between two spheres, J

E is the electric field potential between the two spheres N/C

d is the distance between two charged bodies, m

$V = \frac{K*q}{d^2}*d = \frac{K*q}{d}$

$d = \frac{K*q}{V}$

where;

K is coulomb's constant = 8.99 X 10⁹ Nm²/C²

d = (8.99 X 10⁹ X 6.408 X 10⁻⁶)/0.063

d = 914.41 X 10³ m

Therefore, the distance between the two spheres is 914.41 X 10³ m

3 0

4 years ago

What are 5 examples of balanced and unbalanced forces in your home?

ryzh [129]

Balance:
a book resting on a table
a car driving at 10 miles per hour in constant velocity
a cat sitting on a chair
a bulb that attach to the ceiling
your grandma sleeping on a bed
Unbalance:
your brother sprinting across the kitchen
a ball rolling at 5 m/s^2
your mom trying to run at 2 m/s^2 to spank you
you dropping your coffee mug on a floor
a cat jumping out of your bed
a tear from your eye falling through the floor
Hope this helps

8 0

4 years ago

What happens when gasoline is used to power a vehicle?

mojhsa [17]

<span>Energy is neither lost nor gained as it transforms from chemical, to heat, to mechanical energy.</span>

5 0

3 years ago

Help me pleaseee, it’s due today: Two people push on a large gate as shown on the view from above in the diagram. If the moment

Sladkaya [172]

Answer:

the angular acceleration of the gate is approximately 1.61 $\frac{rad}{s^2}$

Explanation:

Recall the formula that connects the net torque with the moment of inertia of a rotating object about its axis of rotation, and the angular acceleration (similar to Newton's second law with net force, mass, and linear acceleration):

$\sum \tau_1=I\,\alpha$

In our case, both forces contribute to the same direction of torque, so we can add their torques up and get the net torque on the gate:

$\tau_{net}=(20*2+30*3.5) \,N\,m=145\,\,N\,m$

Now we use this value to obtain the angular acceleration by using the given moment of inertia of the rotating gate:

$\sum \tau_1=I\,\alpha\\145\,\,N\.m=(90\,\,kg\,m^2)\,\alpha\\\alpha= \frac{145}{90} \frac{rad}{s^2} = 1.61\, \frac{rad}{s^2}$

4 0

3 years ago