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3 years ago

Identify the situations that have an unbalanced force. Check all that apply.

Physics

2 answers:

pochemuha3 years ago

7 0

the answer is.......................1,4,5

faltersainse [42]3 years ago

5 0

Answer:

A weight speeds up as it falls through the air.

A bumper car hit by another car moves off at an angle.

A balloon flies across the room when the air is released.

Explanation:

An object accelerates when unbalanced force acts on it that is some net non zero force acts on it.

With balanced force, i.e. the net zero force, the object is at rest or moves in straight line at constant speed.

The given situations that have an unbalanced force acting on it are:

A weight speeds up as it falls through the air - the weight accelerates as it falls towards ground.

A bumper car hit by another car moves off at an angle- the cars collide, unbalanced force causes the direction of the car to change

A balloon flies across the room when the air is released - when air is released, an equal of force acts on the balloon in opposite direction and thus it flies.

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Answer:

3 objects that depend on the electromagnetic spectrum would be television, radios, and the Microwave. This is due to the fact that radio waves depend on the electromagnetic spectrum and televisions and radios require radio waves. The microwaves also depend on the electromagnetic spectrum in order to make the Mircowave work

Explanation:

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3 years ago

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Two point sources are simultaneously creating waves with a wavelength of 6 cm. Point X lies between the two sources. It is 9 cm

jok3333 [9.3K]

Answer:

OPTION D (The waves will sometimes get very high and very low) is the answer.

Explanation:

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3 years ago

A carbon rod with a radius of 1.9 mm is used to make a resistor. What length of the carbon rod should be used to make a 3.7 Ω re

vladimir2022 [97]

Answer:

Length = 2.32 m

Explanation:

Let the length required be 'L'.

Given:

Resistance of the resistor (R) = 3.7 Ω

Radius of the rod (r) = 1.9 mm = 0.0019 m [1 mm = 0.001 m]

Resistivity of the material of rod (ρ) = $1.8\times 10^{-5}\ \Omega\cdot m$

First, let us find the area of the circular rod.

Area is given as:

$A=\pi r^2=3.14\times (0.0019)^2=1.13\times 10^{-5}\ m^2$

Now, the resistance of the material is given by the formula:

$R=\rho( \frac{L}{A})$

Express this in terms of 'L'. This gives,

$\rho\times L=R\times A\\\\L=\frac{R\times A}{\rho}$

Now, plug in the given values and solve for length 'L'. This gives,

$L=\frac{3.7\ \Omega\times 1.13\times 10^{-5}\ m^2}{1.8\times 10^{-5}\ \Omega\cdot m}\\\\L=\frac{4.181}{1.8}=2.32\ m$

Therefore, the length of the material required to make a resistor of 3.7 Ω is 2.32 m.

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3 years ago

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True.

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A copper wire is still a copper wire when it is conducting electricity. Like wise, an aluminum rod is still an aluminum rod when heated. It is conducting heat but the heat does not change it, it is still an aluminum rod during the whole process.

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