Our solar system formed from a huge cloud of dust and gas called a _____.a. disk
b. protostar
c. solar nebula
d. planetesimal
Answers
The correct answer is C. Solar nebula
Explanation:
According to scientists, the Solar nebula was rotating disk or cloud of dust and gas (mainly hydrogen and helio) that is believed was the origin of our solar system. Indeed, it is estimated the formation of our solar system began 4.6 billion years ago as the solar nebula began contracting forming first the sun in the center and then other elements such as planets. This theory was first proposed in 1734 by Emanuel Swedenborg; however, from the first proposal, multiple models have emerged related to this theory and nowadays, the solar nebula theory is the one that scientist believe explain the formation of our solar system and other solar systems. Thus, our solar system formed from a huge cloud of dust and gas called a solar nebula.
c. solar nebula
Based on the nebular hypothesis, our solar system formed from hydrogen gas and interstellar dust. The gas and the dust contracted and formed the early stage of the sun.
Related Questions
Andy is waiting at the signal. As soon as the light turns green, he accelerates his car at a uniform rate of 8.00 meters/second2. What is the displacement of Andy’s car after 30.0 seconds?
Define the moment of a force
F=5560Kg x 2.55m/s². I need help solving this
A duck is 12 m from the edge of a pond. A student stands in the middle of the pondand creates ripples that travel past the duck and towards the edge of the pond. Theripples are produced uniformly at 2 ripples per second. The student determines thatthe ripples take 3.0 seconds after they pass the duck to reach the edge of the pond.Determine the wavelength of the ripples.
Answers
Answer:
A.) 3.975 m/s
B.) 0.925 m/s
Explanation:
Given that a person walks first at a constant speed of 4.90 m/s along a straight line from point A to point B and then back along the line from B to A at a constant speed of 3.05 m/s.
A) What is her average speed over the entire trip?
The average speed = (4.90 + 3.05)/2
Average speed = 7.95/2
Average speed = 3.975 m/s
B) What is her average velocity over the entire trip?
Since velocity is a vector quantity, that is, we consider both the magnitude and direction
Average velocity = ( 4.90 - 3.05)/2
Average velocity = 1.85/2
Average velocity = 0.925 m/s
Answers
If a particular atom of an element has five protons a neutral atom of this element would have 5 electrons.
What is an atom?
An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.
The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.
Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.
Learn more about atom,here:
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a neutral atom has no electrical charge. protons are positive and electrons are negative, they need to be the same to make it a neutral atom.
Answers
ΔG = ΔH – TΔS
Answer:
Melting of ice is an endothermic process, meaning that energy is absorbed. When ice spontaneously melts, ΔH (change in enthalpy) is "positive". ΔS (entropy change) is also positive, because, becoming a liquid, water molecules lose their fixed position in the ice crystal, and become more disorganized. ΔG (free energy of reaction) is negative when a reaction proceeds spontaneously, as it happens in this case. Ice spontaneously melts at temperatures higher than 0°C. However, liquid water also spontaneously freezes at temperatures below 0°C. Therefore the temperature is instrumental in determining which "melting" of ice, or "freezing" of water becomes spontaneous. The whole process is summarized in the Gibbs free energy equation:
Explanation:
B. 20 N
C. 1,176 N
D. 196 N User: A man standing on a bus remains still when the bus is at rest. When the bus moves forward and then slows down the man continues moving forward at the original speed. This is an example of the effect of
A. velocity.
B. gravity.
C. weight.
D. inertia.
Answers
Well first of all, if the object's mass is 120 kg, then its mass is 120 kg.
It makes no difference where it happens to be located at the moment.
Its mass is 120 kg. Period. It doesn't change.
Weight = (mass) x (acceleration of gravity) .
Acceleration of gravity on the moon is 1.622 m/s² (rounded) .
Weight of the object = (120 kg) x (1.622 m/s²) = 194.6 Newtons.
(about 43.8 pounds)
The nearest choice is D). 196 N.
===========================================
When the bus starts moving forward, the man remains still.
He leans back, and soon catches up.
When the bus is moving but begins to slow down, the man
continues moving forward at the same speed. He leans forward,
until the bus stops, and then he eventually stops.
The simplest way to explain this (although it doesn't tell you much)
is to invoke 'inertia'. 'D' is the choice of the choices.
For second question, intertia is the thing that described in the question. Answer is D.
Answers
Answer: D. relatively inexpensive and readily available
Fossil fuels are non-renewable sources of energy these resources formed by the geological processes occurring in the earth. It takes millions of years for their formation. These includes coal, petroleum, and natural gas. Unfortunately, the distribution of these resources is not even in the regions of the world but efforts have been done by the humans to make them available everywhere. They are relatively inexpensive and readily available this contributes to the majority of the world's energy use.
In short, Your Answer would be Option D
Hope this helps!
Answers
Since initial velocity is zero, the second term goes away:
Answer:
1.05 s
Explanation: