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2 years ago

Identify the energy transformation that occurs in the light bulb of a lamp:

Physics

1 answer:

vekshin12 years ago

3 0

Answer:

In the light bulb, the flow of charge through the filament heats it up and causes it to glow. In this way, the light bulb converts electrical energy to heat energy and light energy. Chemical energy in the batteries is transferred into electrical energy.

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A(n) __________ refers to a substance or treatment that is often used in an experiment but does not have an actual medicinal or

kipiarov [429]

Answer:

A placebo refers to a substance or treatment that is often used in an experiment but does not have an actual medicinal or experimental benefit.

Explanation:

3 0

2 years ago

Read 2 more answers

What is the magnitude of a the vertical electric field that will balance the weight of a plastic sphere of mass 2. 1 g that has

sladkih [1.3K]

The magnitude of a vertical electric field that will balance the weight of a plastic sphere of mass 2. 1 g that has been charged to -3. 0 NC is 6.86 × $10^{6}$ N/C.

An electric field is the physical field that surrounds electrically charged particles and exerts a force on all other charged particles in the field, either attracting or repelling them. It also refers to the physical field of a system of charged particles.

It is given that,

Mass of sphere, m = 2.1 g =0.0021kg

Charge,q = ₋3nC = ₋ 3 ₓ $10^{-9}$

To balance the weight of a plastic sphere, we must determine the magnitude of the electric field. So,

$ma= qE$

a = g

$E = \frac{mg}{q}$

E = $\frac{0.0021 * 9.8}{-3 * 10^{-9} }$

E = 6860000 N/C

E = 6.86 × $10^{6}$ N/C

Hence, the magnitude of the electric field that balances its weight is 6.86 × $10^{6}$ N/C .

To know more about electric field refer to: brainly.com/question/8971780

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5 0

1 year ago

An experiment begins with crystalline salt at the bottom of an otherwise empty glass. First, students add water to the glass. Th

vfiekz [6]

Answer:

Explanation:

When we add salt to water entropy of the system increases because some amount of energy is released as salt dissolves in the water due to the dissociation of ions.

Therefore entropy of the system after the salt dissolves is highest among them all and the least entropy is associated when mixing begins.

Entropy is the degree of randomness and it increases when salt dissociates to $Na^{+}\ and\ Cl^{-}$ as these ions are freer to move inside an aqueous solution compared to Previous state.

8 0

3 years ago

Microwave ovens emit microwave energy with a wavelength of 12.1 cm. What is the energy of exactly one photon of this microwave r

EastWind [94]

Answer:

$1.64\cdot 10^{-24}J$

Explanation:

The energy of a photon is given by:

$E=\frac{hc}{\lambda}$

where

$h=6.63\cdot 10^{-34} Js$ is the Planck constant

$c=3\cdot 10^8 m/s$ is the speed of light

$\lambda$ is the wavelenght of the photon

For the microwave photons in this problem,

$\lambda=12.1 cm=0.121 m$

so their energy is

$E=\frac{(6.63\cdot 10^{-34}Js)(3\cdot 10^8 m/s)}{0.121 m}=1.64\cdot 10^{-24}J$

3 0

3 years ago

Whose definition of acids and bases emphasizes the role of protons

torisob [31]

Answer:

Bronsted Lowry

Explanation:

Acid is defined as a proton donor.

While base is a proton acceptor

What is an acid An acid

An acid is a substance that donates protons or accepts a pair of valence electrons to form a bond

What is a base?

A base is a substance that can accept protons or donate a pair of valence electrons to form a bond. Bases can be thought of as the chemical opposite of acids.

3 0

3 years ago