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4 years ago

Which two forms of energy does a hairdryer convert electric energy into? A.)chemical energy

Physics

2 answers:

Ne4ueva [31]4 years ago

3 0

D, because the hairdryer uses a fan
E, because it produces heat

Leni [432]4 years ago

3 0

<h3>Answer;</h3>

D.) motion energy 

E.) radiant energy

<h3>Explanation;</h3>

Energy is the ability to do work. From the law of conservation of energy, energy can not be created nor destroyed by may be transformed from one form to another. Instruments or devices which converts energy from one form to another are called transducers.
Hair dryer is an example of a transducer which converts electrical energy to either thermal or heat energy and also to kinetic energy. Electrical energy entering the hair dryer is converted to kinetic energy or motion energy as the small electric motor in the dryer spins a fan blade.
Additionally, electrical energy is also converted into heat or thermal energy in a grid of wire that heats up. The fan pushes air across the hot wires, and hot air blows out the nozzle of the hair dryer.

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The law of conservation of momentum states that the total momentum of interacting objects does not change . This means the total

pickupchik [31]

Answer:

The momentum of an object is equal to the product of its mass and its velocity.

Explanation:

Consider an object of mass $m$ travelling at a velocity $\vec{v}$ . The momentum $\vec{p}$ of this object would be:

$\vec{p} = m \cdot \vec{v}$ .

For the law of conservation of momentum, consider two objects: object $\rm a$ and object $\rm b$ . Assume that these two objects collided with each other.

Let $m_{\rm a}$ and $m_{\rm b}$ denote the mass of the two objects.
Let $\vec{v}_{\rm a}(\text{initial})$ and $\vec{v}_{\rm b}(\text{initial})$ denote the velocity of the two object right before the interaction.
Let $\vec{v}_{\rm a}(\text{final})$ and $\vec{v}_{\rm b}(\text{final})$ denote the velocity of the two objects right after the interaction.

The momentum of the two objects right before the collision would be $m_{\rm a}\cdot \vec{v}_{\rm a}(\text{initial})$ and $m_{\rm b}\cdot \vec{v}_{\rm b}(\text{initial})$ , respectively.
The momentum of the two objects right after the collision would be $m_{\rm a}\cdot \vec{v}_{\rm a}(\text{final})$ and $m_{\rm b}\cdot \vec{v}_{\rm b}(\text{final})$ , respectively.

The sum of the momentum of the two objects would be:

$m_{\rm a}\cdot \vec{v}_{\rm a}(\text{initial}) + m_{\rm b}\cdot \vec{v}_{\rm b}(\text{initial})$ right before the collision, and
$m_{\rm a}\cdot \vec{v}_{\rm a}(\text{final}) + m_{\rm b}\cdot \vec{v}_{\rm b}(\text{final})$ right after the collision.

Assume that the system of these two objects is isolated. By the law of conservation of momentum, the sum of the momentum of these two objects should be the same before and after the collision. That is:

$m_{\rm a}\cdot \vec{v}_{\rm a}(\text{initial}) + m_{\rm b}\cdot \vec{v}_{\rm b}(\text{initial}) = m_{\rm a}\cdot \vec{v}_{\rm a}(\text{final}) + m_{\rm b}\cdot \vec{v}_{\rm b}(\text{final})$ .

4 0

4 years ago

If I punch a wall, what is the Newton's 3rd Law Pair force?

UkoKoshka [18]

For every reaction, there is an equal and opposite reaction. This means that with every interaction, theres a pair of opposite forces on the object.

4 0

4 years ago

A low C (f = 65Hz) is sounded on a piano. If the length of the piano wire is 2.0 m and its mass density is 5.0 g/m2, determine t

LuckyWell [14K]

Answer:

Tension of the wire(T) = 169 N

Explanation:

Given:

f = 65Hz

Length of the piano wire (L) = 2 m

Mass density = 5.0 g/m² = 0.005 kg/m²

Find:

Tension of the wire(T)

Computation:

f = v / λ

65 = v / 2L

65 = v /(2)(2)

v = 260 m/s

T = v² (m/l)

T = (260)²(0.005/2)

T = 169 N

Tension of the wire(T) = 169 N

6 0

4 years ago

In order to increase the speed in a gear system

Ludmilka [50]

Answer:

the driving gear must be larger than the driven gear

Explanation:

6 0

3 years ago

In the following reaction, 24 g of CH4 react with 96 g of Oz to form 66 g of CO2

Brut [27]

Answer:

54 g

Explanation:

Mass is conserved. Mass of reactants = mass of products.

24 g + 96 g = 66 g + x

x = 54 g

8 0

3 years ago