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3 years ago

Which of these diagrams best represents the steps in the formation of planets?

2 answers:

6 0

The right answer for the question that is being asked and shown above is that: "C) The clouds of dust and gases rotate at high speed > The clouds condense > The sun is born > The planets are born " This is the diagram that best represents the steps in the formation of planets

Leviafan [203]3 years ago

4 0

Answer:

D) The clouds of gases condense > The clouds rotate at high speed > The clouds flatten into an elliptical disc > The planets are born

Explanation:

Planets are formed from Planetary nebula. The cloud of dust and gases condenses under its own weight. The condensed matter starts rotating at high speeds and gathers more mass. The core forms the star and rest of it eventually flattens into an elliptical disc from which planet is born. Thus, the correct sequence is: D) The clouds of gases condense > The clouds rotate at high speed > The clouds flatten into an elliptical disc > The planets are born.

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A vertical piston-cylinder device contains water and is being heated on top of a range. During the process, 63 Btu of heat is tr

jolli1 [7]

Answer:

The water would have a change in the energy of 50 BTU

Explanation:

Under the assumption that the piston-cylinder system is a closed system, then the conservation law of the system would be: $E_{in}-E_{out}=E_{change}$ , where $E_{in}$ is all the energy that goes into the system, $E_{out}$ is all the energy that leaves the system and, $E_{change}$ is the change of the energy of the system.
For this case the energy that is feeded to the system is heat: 63 BTU.
There is two ways that energy is leaving this system: 8 BTU of heat as losses through the side walls and, 5 BTU of work done by the vapor on the piston.
Then the change of energy of the system is: $E_{change}=E_{in}-E_{out}=63 BTU-(8BTU+5BTU)=50BTU$ .

6 0

3 years ago

Question 14 of 30

polet [3.4K]

Answer:

kinetic and potential

4 0

3 years ago

How is thermal energy transferred between two objects that are at different temperatures?

OLga [1]

Answer:

when you bring two objects of different temperatures together, energy will always be transferred from the hotter to the cooler object. The objects will exchange thermal energy, until thermal equilibrium is reached, until their temperatures are equal. We say that heat flows from the hotter to the cooler object.

6 0

4 years ago

A basketball has a mass of 1 kg and is traveling 12 m/s

cricket20 [7]

A) It would be doubled.

Why?

To answer the question, we just need to calculate the momentum of the basketball using the following formula:

$Momentum=mass*velocity\\\\Momenum=1kg*12\frac{m}{s}=12\frac{kg.m}{s}$

Now, we have calculated the momentum and the result is 12 kg.m/s, what would happen to the velocity if we double the momentum? Let's calculate it!

$Momentum=mass*velocity\\\\(2)*12\frac{kg.m}{s}=1kg*velocity\\\\velocity=\frac{24\frac{kg.m}{s} }{1kg} =24\frac{s}{s}$

Hence, we can see that if the momentum is doubled, the velocity will be doubled too.

Have a nice day!

7 0

3 years ago

if a car has a kinetic energy of 400 J at 20m/s what.is the cars kinetic energy in kJ at a speed of 5 m/s

Nutka1998 [239]

Kinetic energy is an expression of the fact that a moving object can do work on anything it hits; it quantifies the amount of work the object could do as a result of its motion. It can be calculated as:

KE = mv^2 /2

We calculate the problem as follows:

KE = mv^2 /2

400 = m(20)^2 / 2

m = 2 kg

8 0

3 years ago