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3 years ago

What is the equivalent resistance for a series circuit with three resistors: 19.2 ohms, 24.6 ohms, and 31.2 ohms?

Physics

2 answers:

navik [9.2K]3 years ago

5 0

The answer would be 75 ohms

Talja [164]3 years ago

5 0

Answer : The equivalent resistance for a series circuit is $75.0\Omega$

Explanation :

Equivalent resistance : It represents the total effect of all resistors in the circuit.

In series circuit, we add all the resistances of each component.

$R=R_1+R_2+R_3....$

In parallel circuit, the reciprocal of the total resistance is equal to the sum of the reciprocals of the resistances of each component.

$\frac{1}{R}=\frac{1}{R_1}+\frac{1}{R_2}+\frac{1}{R_3}...$

As we are given:

$R_1=19.2\Omega$

$R_2=24.6\Omega$

$R_3=31.2\Omega$

Now we have to calculate the equivalent resistance for a series circuit.

$R=R_1+R_2+R_3$

$R=19.2\Omega+24.6\Omega+31.2\Omega$

$R=75.0\Omega$

Therefore, the equivalent resistance for a series circuit is $75.0\Omega$

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Which measure of dispersion indicates the extent to which each individual score in a data set varies from the mean of that set?

vichka [17]

Answer:

Option 2 - Standard deviation

Explanation:

To find : Which measure of dispersion indicates the extent to which each individual score in a data set varies from the mean of that set?

Solution :

Standard deviation is defined as,

It is a mathematical measure that is used to evaluate the difference between the mean value of a set of number and each value in the group.

It is calculated as the square root of variance by determining the variation between each data point relative to the mean.

The measure of dispersion that indicates how much scores in a sample vary around the mean of the sample is the standard deviation.

Therefore, option 2 is correct.

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3 years ago

illustrate the difference between a neutral object, a positively charged object, and a negatively charged object

Feliz [49]

Answer:

A neutral object has the same charge. A positively charged object have positive charges called electrons. A negatively charged object have negative charges called protons.

Diagram of each down below -

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3 years ago

What is the definition of physical change

jeka94

They are used to separate mixtures into their component compounds but can no usually be used to deprecate compounds into chemical elements or simpler compounds

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3 years ago

A Meteorite Strikes On October 9, 1992, a 27-pound meteorite struck a car in Peekskill, NY, leaving a dent 22 cm deep in the tru

vagabundo [1.1K]

Answer:

Acceleration of the meteorite, $a=-38409.09\ m/s^2$

Explanation:

It is given that,

A Meteorite after striking struck a car, v = 0

Initial speed of the Meteorite, u = 130 m/s

Distance covered by Meteorite, s = 22 cm = 0.22 m

We need to find the magnitude of its deceleration. It can be calculated using the third equation of motion as :

$a=\dfrac{v^2-u^2}{2s}$

$a=\dfrac{-(130)^2}{2\times 0.22}$

$a=-38409.09\ m/s^2$

So, the deceleration of the Meteorite is $-38409.09\ m/s^2$ . Hence, this is the required solution.

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3 years ago

An ice cube of mass 50.0 gg can slide without friction up and down a 25.0 degreedegree slope. The ice cube is pressed against a

kompoz [17]

<em>We have assumed the distance to be 0.1 meters (not millimeters) since the question has issues when expressing the units</em>

Answer:

$d=0.60\ m$

Explanation:

<u>Energy Conversion</u>

We need to understand and apply the concepts of energy conversion to solve this problem. Three types of energy are manifested in the motion of the ice cube of mass m.

When it's above the ground level at a height h, it has potential gravitational energy, given by

$U=mgh$

If the cube is moving at speed v, it has kinetic energy, given by

$\displaystyle K=\frac{1}{2}mv^2$

Finally, when it compresses the spring, it has elastic energy:

$\displaystyle E=\frac{1}{2}kx^2$

Where x is the distance of compression and k is the spring constant

When the ice cube is released, it has potential gravitational energy which magnitude we cannot calculate since we don't have the height. Then it goes down the slope and acquires speed and kinetic energy until it stops when compressing the spring a distance x. In that very moment, the total energy is stored in its elastic form:

$\displaystyle E=\frac{1}{2}25\cdot 0.1^2=0.125\ J$

When the ice cube travels up powered by that energy, it has both kinetic and potential energies, and it stops up in the ramp and starts reversing direction when it runs out of speed, thus the total potential energy is

$mgh=0.125\ J$