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3 years ago

Label the layers of the Earth in order from youngest to oldest according to the law of superposition.

Physics

1 answer:

zaharov [31]3 years ago

4 0

Answer:

With the increase in depth, age of layer increases.

Explanation:

According to the law of superposition, the layer of the Earth that is present in the deep is considered as the oldest layer while on the other hand, those layer which is present on the top of all layers is considered as youngest layer of earth. When we move from the top layer towards the bottom layer, the age of layer increases or in other words, when we move upward the age of the layer decreases so label the layers of earth on the basis of this phenomenon.

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A voltmeter reads 200 V between parallel plates that are 2 cm apart. what is the strength of the electric field between the two

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I think that is c) l’m not sure

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3 years ago

A Van Der Graaf generator is used to build up charges on the outside of a sphere. A belt is charged with electrons by rubbing ag

Nikolay [14]

Answer:

"When neutral objects are brought near the sphere, they are attracted to the sphere before they touch each other."

Explanation:

Charging by induction is said to occur when an uncharged object is brought near a charged body and it gets attracted towards it without even the two bodies touching.

The charged body polarizes the uncharged body. The charges shift to either sides and that causes the force of attraction between the two.

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3 years ago

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Putting a beaker of water in a microwave and turning it on for a minute or two will increase the temperature of the water. Descr

Jobisdone [24]

Answer:

The equipment to use is: a beaker, a fixed amount of water, a thermometer.

The mass of water, the time, the temperature for each time should be noted and a graph of Temperature versus time should be made

Explanation:

The design of an experiment is to place the beaker in the microwave, with a good amount of water (approximately ⅔ of its capacity) and turn it on for small periods of time, generally the minimum is 30 s, quickly open the microwave, place a thermometer or better yet an infrared thermometer to measure the temperature of the water; repeat this several times.

The advantage of the infrared thermometer is that it reduces the transfer of heat between the water and the thermometer.

The mass of water, the time, the temperature for each time should be noted and a graph of Temperature versus time should be made.

The equipment to use is: a beaker, a fixed amount of water, a thermometer.

The main precaution that must be taken is not to open the microwave while it is on.

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3 years ago

if a 0.040-kg stone is whirled horizontally on the end of a 60-m string at a speed of 4.4 m/s, what is the centripetal force ? *

SSSSS [86.1K]

Answer:

0.013N

Explanation:

$F=\frac{mv^{2} }{r}$

m=0.04, v=4.4m/s, r=60

F=0.013 N

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3 years ago

How many free electrons are there in 2.55 cm^ ^ 3 of pure Silicon Note N = Vp and rho = 1.54 free electrons / cm ^3

vagabundo [1.1K]

Answer:

C: 3.93 x 10^22 free electrons

Explanation:

The no. of free electrons can be found out using the following formula:

$N = V\rho\\$

where,

N = No. of free electrons = ?

V = Volume = 2.55 cm³

ρ = density of electrons = 1.54 x 10²² free electrons/cm³

Therefore, using these values in the equation, we get:

$N = (2.55\ cm^3)(1.54\ x\ 10^{22}\ free\ electrons/cm^3)\\$

N = 3.93 x 10²² free electrons

Therefore, the correct option is:

<u>C: 3.93 x 10^22 free electrons</u>

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3 years ago