What causes a nebula to collapse into a dense mass?

Answers

Answer 1

Answer: the answer is Gravity.

Irregularities in the density of the gas causes a net gravitational force

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A nail is made pointed why

Given a force of 100 n and an acceleration of 10 m/s2 what is the mass

Answers

F = m*a
Force = mass times acceleration

We don't have the mass, which means we divide.

100 newtons / 10 m/s/s = 10 kg

The mass is 10 kg

Figure 1.18 (Chapter 1) shows the Hoover Dam Bridge overthe Colorado River at a height of 271 m. If a heavy object is
dropped from the bridge, how much time passes before the
object makes a splash?

Answers

Answer: 7.436 s

Explanation:

This situation is related to vertical motion, specifically free fall and can be modelled by the following equation:

$y=y_(o)+V_(o) t+(gt^(2))/(2)$

Where:

$y= 0m$ is the final height of the object (when it makes splash)

$y_(o)=271 m$ is the initial height of the object

$V_(o)=0 m/s$ is the initial velocity of the object (it was dropped)

$g=-9.8m/s^(2)$ is the acceleration due gravity (directed downwards)

$t$ is the time since the objecct is dropped until it makes splash

$0=y_(o)+0+(gt^(2))/(2)$

Clearing $t$ :

$t=\sqrt{(-2y_(o))/(g)}$

$t=\sqrt{(-2(271 m))/(-9.8m/s^(2))}$

Finally:

$t=7.436 s$

Which events are associated with convergent boundaries? Check all that apply. formation of island chains creation of mid-ocean ridges creation of new mountains formation of earthquakes formation of volcanoes

Answers

Answer:

- creation of mid-ocean ridges

-creation of new mountains

-formation of earthquakes

-formation of volcanoes

Convergent boundary plate tectonic involves collisions between oceanic and continental plates. The thinner and less denser oceanic plate overriden by the thicker and more denser continental plate. The oceanic plate is forced down the mantle, this event is known as subduction. The magma present in the mantle causes melting of subduction plates. The magma enters inside these plates through pores. This magma plate becomes bouyant and moves upwards. The molten magma causes volcanic eruptions along with earthquakes. If the magma solidifies in the subduction zone it creates mid ocean ridges. The mountains are formed near the continents when the magma after volcanic eruption gets cooled and solidified.

All the events are associated with convergent boundaries. Creation of mid-ocean ridges, Creation of new mountains, and formation of earthquakes.

What are convergent boundaries?

A convergent boundary occurs when two or more lithospheric plates clash on Earth. Subduction is the process through which one plate moves beneath the other.

The events are associated with convergent boundaries are;

1 . Creation of mid-ocean ridges

2. Creation of new mountains

3. Formation of earthquakes

4. Formation of volcanoes

Collisions between oceanic and continental plates are involved in convergent boundary plate tectonics. The oceanic plate, which is thinner and less dense, is pushed aside by the continental plate,

Which is thicker and denser. Subduction occurs when an oceanic plate is driven down into the mantle. The melting of subduction plates is caused by magma in the mantle.

The magma seeps into the pores of these plates. This magma plate rises as it gets buoyant. Volcanic eruptions and earthquakes are both caused by molten magma.

Mid-ocean ridges form as magma solidifies in the subduction zone. Mountains are generated near continents as lava cools and solidifies following a volcanic eruption.

To learn more about the convergent boundaries refer to the link;'

brainly.com/question/1114405

Explain how if two cases are side by side on a shelf one an have more potential energy

Answers

Potential energy = (mass) x (gravity) x (height).

Even if the two objects are at the same height, the one
with more mass has more potential energy.

La ce distanta de la suprafata Pamintului intensitatea cimpului sau gravidational este egala cu 1 N/kg ?Va rooogggg .. ofer 21 puncte !!!

Answers

Acceleration of gravity is proportional to 1/D² .
('D' is the distance from the Earth's center.)

We need (D / R)² = 9.8
('R' is the Earth's radius.)

D/R = √9.8 = 3.13

Distance from Earth's center = 3.13 R
Distance above Earth's surface = 2.13 R = about 13,570 km =====================================================

Accelerarea de gravitate este proporțională cu 1 / D².
('D este distanța de centrul Pământului.)

Avem nevoie de (D / R) ² = 9,8
('R' este raza Pământului.)

D / R = √9.8 = 3,13

Distanța de la centrul Pamantului = 3,13 R
Distanța de deasupra suprafetei Pamantului = 2.13 R = aproximativ 13,570 km

In your own words, define the following terms. Radiation, Convection, and conduction.

Answers

Radiation: transferred energy
Convection: Transfer of heat
Conduction: transfer of electric charge

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