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3 years ago

12

I understand what makes a kettle so efficient, but what are some improvements you can make to a kettle to increase it’s energy e

fficiency?

1 answer:

shusha [124]3 years ago

3 0

Answer:

Reheat the cold cup of tea or coffee in the microwave. ...

Make iced tea or coffee with what's left. ...

Use a thermos for either tea or coffee.

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Do solids flow and how do they do that

Eva8 [605]

Answer:

solids cannot flow because the molecules a held tightly together

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3 years ago

Read 2 more answers

What does the addition of two vectors give you?

kirill [66]

Answer:

D. Resultant Vector

Explanation:

By definition, adding 2 vectors gives a resultant vector

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4 years ago

Substances in a mixture keep their own properties.<br> True False

ra1l [238]

That is true. They aren't undergoing a chemical change. They are still the same.

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3 years ago

La velocidad de la luz en el vacío es c= 3000.000 km\s la luz del sol tarda en llegar a la tierra 8 minutos y 14 segundos

ehidna [41]

La velocidad correcta de la luz en el vacío es 300.000 km/s .

La distancia = (velocidad) x (duración de tiempo)

Duración de tiempo = 494 segundos, porque cada minuto = 60 segundos

La distancia = (300.000 km/s) x (494 s)

<em>La distancia = 148.200.000 km</em>

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4 years ago

Two identical ice hockey pucks, labeled A and B, are sliding toward each other at speed v. Which one of the following statements

ollegr [7]

Answer:

C. $p_{A} = -p_{B}$ and $K_{A} = K_{B}$ .

Explanation:

The two hockey pucks travels in opposite sides with velocities of same magnitude, by definitions of linear momentum and translational kinetic energy:

Linear momentum

<em>Hockey puck A</em>

$p_{A} = m\cdot v$ (1)

<em>Hockey puck B</em>

$p_{B} = -m\cdot v$ (2)

$p_{A} = -p_{B}$

Translational kinetic energy

<em>Hockey puck A</em>

$K_{A} = \frac{1}{2}\cdot m\cdot (v)^{2}$

$K_{A} = \frac{1}{2}\cdot m \cdot v^{2}$ (3)

<em>Hockey puck B</em>

$K_{B} = \frac{1}{2}\cdot m\cdot (-v)^{2}$

$K_{B} = \frac{1}{2}\cdot m \cdot v^{2}$ (4)

$K_{A} = K_{B}$

Hence, the correct answer is C.

7 0

3 years ago