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2 years ago

Metallic bonds are responsible for many properties of metals, such as conductivity. Why is this possible? (1 point)

Physics

1 answer:

qaws [65]2 years ago

4 0

Answer:

The bonds can shift because valence electrons are held loosely and more freely

Explanation:

Please give brainliest if you can,have a good day<3 :)

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Which of the following elements is the most chemically reactive?

ivolga24 [154]

Answer:

B) Fluorine

Explanation:

The most reactive element is fluorine, the first element in the halogen group. The most reactive metal is francium, the last alkali metal (and most expensive element).

6 0

2 years ago

A block of wood of mass 24 kg floats on water. The volume of the block below the surface of the water and the density of the woo

Slav-nsk [51]

Answer:

0.024m^3

Explanation:

=======

Answer:

=======

Given:-

Mass of the block of wood = 24 kg

Volume of wood = 0.032 m^3

Density of water = 1000kg/m^3

Now,

Density of wood is given by,

\frac{m}{v} = \frac{24}{0.032} \\

\frac{m}{v} = 750 \: kg/m ^{3}

Therefore,

The density of wood is 750kg/m^3

By principle of floatation,

Mass \:of\: wood = Mass\: of\: liquid \:displaced

Therefore,

Mass of liquid displaced = 24kg

Volume of liquid displaced (v),

\frac{m}{v} = \frac{24}{1000} \\

\frac{m}{v} = 0.24m ^{3}

Now,

Since the volume of the wood is equal to the volume of water displaced, it is 0.024m^3

=====

Note:

=====

=> The volume of the wood below the water surface is the volume of water displaced.

=> Buoyant\: force = Weight\: of\: the \:displaced\: water.

8 0

3 years ago

13. A step up transformer has 250 turns on its primary and 500 turns on it secondary. When the primary is connected to a 200 V a

Lisa [10]

Answer:

The output power is 2 kW

Explanation:

It is given that,

Number of turns in primary coil, $N_p=250$

Number of turns in secondary coil, $N_s=500$

Voltage of primary coil, $V_p=200\ V$

Current drawn from secondary coil, $I_s=5\ A$

We need to find the power output. It is equal to the product of voltage and current. Firstly, we will find the voltage of secondary coil as :

$\dfrac{N_p}{N_s}=\dfrac{V_p}{V_s}$

$\dfrac{250}{500}=\dfrac{200}{V_s}$

$V_s=400\ V$

So, the power output is :

$P_s=V_s\times I_s$

$P_s=400\ V\times 5\ A$

$P_s=2000\ watts$

$P_s=2\ kW$

So, the output power is 2 kW. Hence, this is the required solution.

8 0

3 years ago

Time ____ is a phenomenon in which objects in motion and objects at rest experience time differently.

BlackZzzverrR [31]

Time $\sf\purple{dilation}$ is a phenomenon in which objects in motion and objects at rest experience time differently.

In simple words, time dilation means that time passes more slowly in moving reference frames compared to a stationary one.

$\circ \: \: { \underline{ \boxed{ \sf{ \color{green}{Happy\:learning.}}}}}∘$

5 0

3 years ago

Read 2 more answers

What produces more severe burns, boiling water or steam?

Romashka-Z-Leto [24]

Answer:

$steam$

Explanation:

$in \: steam \: the \: particle \: \\ \\ will \: have \: more \: energy \\ \\ because \: steam \: contain \: more \\ \\ \: heat \: in \: the \: form \: of \: \\ \\ latent \: heat \: than \: water \: \\ \\ hope \: it \: helps$

6 0

3 years ago