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2 years ago

Question 11 of 29

Physics

1 answer:

lara [203]2 years ago

3 0

Answer:

the answer is a

Explanation:

wawawawawawawawawawawawawa

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Which statement describes the difference between metallic bonds and Van der Waals forces

JulsSmile [24]

Explanation:

Metallic bonds hold metal atoms and freely moving valence electrons together, while Van der Waals forces hold nonpolar molecules together. OD. Metallic bonds hold metal atoms and freely moving valence electrons together while Van der Waals forces hold atoms together when they share valence electrons.

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2 years ago

A satellite in geostationary orbit is used to transmit data via electromagnetic radiation. The satellite is at a height of 35,00

Nutka1998 [239]

Answer:

$6.99535\times 10^{-6}\ V/m$

Explanation:

P = Power Output = 1000 W

r = Radius = 35000000 m

$\epsilon_0$ = Permittivity of free space = $8.85\times 10^{-12}\ F/m$

c = Speed of light = $3\times 10^8\ m/s$

Intensity of Electric radiation is given by

$I=\dfrac{P}{A}\\\Rightarrow I=\dfrac{P}{4\pi r^2}\\\Rightarrow I=\dfrac{1000}{4\pi\times 35000000^2}\ W/m^2$

Intensity of Electric radiation is given by

$I=\dfrac{1}{2}c\epsilon_0E_0\\\Rightarrow E_0=\sqrt{\dfrac{2I}{c\epsilon_0}}\\\Rightarrow E_0=\sqrt{\dfrac{2\times \dfrac{1000}{4\pi\times 35000000^2}}{3\times 10^8\times 8.85\times 10^{-12}}}\\\Rightarrow E_0=6.99535\times 10^{-6}\ V/m$

The amplitude of the electric field vector is $6.99535\times 10^{-6}\ V/m$

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3 years ago

Y-axis of a velocity-time graph represents

skelet666 [1.2K]

Answer:

The Y-axis in a Velocity/Time graph is the Velocity.

Explanation:

The speed is the velocity. Like in math, speed(velocity)=distance over time. Where time is the X-axis.

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2 years ago

Hello everyone. XxUnknownUserXx needs to be stopped he's abusing a girl named Rosa. Anyone that is friends that lives close to h

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Answer: I will spread this to people! Thank you for telling me.

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2 years ago

Read 2 more answers

When a cold alcohol thermometer is placed in a hot liquid, the column of alcohol goes down slightly before going up. Explain why

VladimirAG [237]

Answer:

See below

Explanation:

<h3>When a cold alcohol thermometer is placed in a hot liquid, the following takes place.</h3>

The glass of thermometer expands because of the heat so the column of alcohol goes down.
After some time, the heat travels to alcohol and then alcohol expands.

<h3><u>So, Reason why alcohol goes down first:</u></h3>

Alcohol first goes slightly down because of the expansion of the glass of thermometer before doing up.

$\rule[225]{225}{2}$

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1 year ago