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3 years ago

one group of atoms on the periodic tables are known as "noble gases". why have they been given this name?

1 answer:

8 0

This group is called “noble gases” because they do not react with other elements. This is because they have a full valence shell.

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Where is visible light located on the electromagnetic spectrum and why?

Marysya12 [62]

Radio waves, gamma-rays, visible light, and all the other parts of the electromagnetic spectrum are electromagnetic ... The different types of radiation are defined by the the amount of energy found in the photons.

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3 years ago

How can you drop two eggs the fewest amount of times, without them breaking?

lord [1]

Answer:

Wrap it in cotton??? like alot of it?

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3 years ago

A rock falls from rest off a cliff and hits the ground in 2 seconds. If there is no air resistance, determine the rock's velocit

mihalych1998 [28]

Answer:

19.6m/s

Explanation:

A Rock falling off a cliff can be modeled as an object starting with zero velocity moves with constant acceleration for certain period of time, for such motion following equation of motion can be used.

$v(t) = v_{0} +at$

here in our case $v_{0} =0$ because object starts off from rest and $a = g =9.8m/s^2$ is acceleration because of gravity ( Motion under gravity).

and of course t = 2 second.

Now by substituting all this information in equation of motion we get.

$v(2s) = 0+9.8m/s^2 *2s = 19.6m/s$

that would be the velocity of rock as it would hit the ground.

Note! We have assumed that there is no air resistance.

A rock falling off a cliff can be modeled as an object starting with zero velocity moves with constant acceleration for a certain period of time, for such motion following equation of motion can be used.

here in our case because object starts off from rest and is acceleration because of gravity ( Motion under gravity).

and of course t = 2 seconds.

Now by substituting all this information in equation of motion we get.

V = 19.6m/s

that would be the velocity of rock as it would hit the ground.

Note! We have assumed that there is no air resistance.

5 0

3 years ago

In an experiment involving pendulums, you want to see how changing the mass of the bob affects the period (amount of time) of a

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Answer:

The longer the length of string, the farther the pendulum falls; and therefore, the longer the period, or back and forth swing of the pendulum. The greater the amplitude, or angle, the farther the pendulum falls; and therefore, the longer the period.

Explanation:

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2 years ago

Which of these is the most likely impact of solar prominence on Earth?

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Thus, letter a is the answer.

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3 years ago

one group of atoms on the periodic tables are known as "noble gases". why have they been given this name?​

one group of atoms on the periodic tables are known as "noble gases". why have they been given this name?