A ball of 12 kg is attached to a string of 0.8 meter spun at 4

The model below shows a calcium atom. An image has a mix of red and blue balls in its center and 4 concentric black rings around

zubka84 [21]

Answer:

8 electrons in the third energy level

Explanation:

From the description,the third energy level has 8 electron (represented by the small green balls you describe)

4 0

3 years ago

What is thought to make the earth behave as if it contained a huge bar magnet?

Elden [556K]

A large amount of molten magnetic material containing Iron is believed to rotate (as a liquid) in the Earth’s core.

7 0

3 years ago

A motorcyclist travelling at 30m/s starts to apply his brake when he is 50m from the traffic light that has just turned red .if

fredd [130]

80 because if you add 50 +30 =80 so yea that why I pick 80

3 0

3 years ago

14. Which type of heat transfer (caused by uneven heating) moves air and water around the earth and creates weather? Question 14

Katena32 [7]

Answer: convection

Explanation:

There are three ways in which the heat (thermal energy) transfer occurs:

1. By Conduction, when the transmission is by the direct contact.

2. By Convection, heat transfer in fluids (like water or the air, for example).

3. By Radiation, by the electromagnetic waves (they can travel through any medium and in vacumm)

In this especific case, we will talk about convection, which occurs when the hottest parts of a fluid ascend to the coldest zones, generating a continuous circulation of the fluid (better known as convective current) transmitting heat to the cold zones by decreasing the density caused by the increase in temperature.

This is what happens in Earth, when the convective heat transfer occurs, through the movement of groups of molecules that make up the medium (water and air in this situation) changing with temperature and creating the weather .

7 0

3 years ago

A mysterious rocket-propelled object of mass 49.5 kg is initially at rest in the middle of the horizontal, frictionless surface

Romashka-Z-Leto [24]

The distance covered by the rocket in the first 5 seconds is 7.13 m

Explanation:

In order to solve the problem, we have to find the acceleration of the rocket. We can do it by using Newton's second law, which states that the net force on the rocket is equal to the product between its mass (m) and its acceleration (a):

$F(t)=ma(t)$