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3 years ago

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State the uses of PET

2 answers:

Rashid [163]3 years ago

4 0

Answer:

It is typically called "polyester" when used for fibers or fabrics, and "PET" or "PET Resin" when used for bottles, jars, containers and packaging applications. PET is the world's packaging choice for many foods and beverages because it is hygienic, strong, lightweight, shatterproof, and retains freshness.

ExtremeBDS [4]3 years ago

3 0

Explanation:

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Which is the SI unit used to measure the temperature of a substance

vagabundo [1.1K]

Answer:

Kelvin

Explanation:

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3 years ago

Read 2 more answers

A child shivers in a cold rain but does not feel cold, what is the biochemistry behind it

algol13

Answer:

Homeostasis is defined as the process by which the internal body system maintains a suitable environment for its proper functions and survival.

When a person temperature drops a signal is sent to the brain which results in a reflex action being observed. The shiver makes the individual warmer and helps in the regulation of the body heat.

3 0

3 years ago

Microwave ovens work by irradiating food with microwaves, which are absorbed by the water molecules in the food and converted to

snow_tiger [21]

Answer:

$7.45\times 10^{26}$ photons are emitted per second in a $1\times 10^3$ Watt microwave oven.

Explanation:

The expression for the power is:-

$Power=\frac{Energy}{Time}$

Also, $E=n\times \frac{h\times c}{\lambda}$

Where,

n = the number of photons

h = Plank's constant having value $6.626\times 10^{-34}\ Js$

c = the speed of light having value $3\times 10^8\ m/s$

$\lambda$ = the wavelength of the light

So,

$Power=\frac{n}{Time}\times \frac{h\times c}{\lambda}$

Thus, the expression for photons per second is:-

$\frac{n}{Time}=\frac{Power\times \lambda}{h\times c}$

Given that:-

Power = 10³ Watt

( 1 cm = 0.01 m)

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So,

$Photon/sec=\frac{10^{3}\times 0.148}{6.626\times 10^{-34}\times 3\times 10^8}=7.45\times 10^{26}$

$7.45\times 10^{26}$ photons are emitted per second in a $1\times 10^3$ Watt microwave oven.

7 0

3 years ago

EMERGENCY OR I WILL FAIL PLS HELP I WILL MARK BRAINLIEST!!!!

Stella [2.4K]

Answer:

1. sublimation

2.melting

3.melting

4.sublimation

Explanation:

melting is a process when solid changes to liquid

Sublimation is the transition of a substance directly from the solid to the gas state, without passing through the liquid state.

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3 years ago

What is the molar mass of calcium chloride dihydrate (CaCl2 • 2H2O)? Be sure to

Verdich [7]

Calcium chloride dehydrate (CaCl₂ · 2 H₂O) have a molar mass equal to 147 g/mol.

Explanation:

To calculate the molar mass of calcium chloride dehydrate (CaCl₂ · 2 H₂O) we use the following formula:

molar mass of CaCl₂ · 2 H₂O = atomic weight of Ca × 1 + atomic weight of Cl × 2 + atomic weight of H × 4 + atomic weight of O × 2

molar mass of CaCl₂ · 2 H₂O = 40 × 1 + 35.5 × 2 + 1 × 4 + 16 × 2

molar mass of CaCl₂ · 2 H₂O = 147 g/mol

Learn more about:

molar mass

brainly.com/question/6112557

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3 years ago