Answer:
The convection process plays an important role in the liquid. Due to the increasing heat supply or high amount of temperature, the fluid gets heated up, as a result of which it becomes warm, less dense and eventually rises up forming convection cells.
In the interior of the earth, the hot molten rocks get heated up due to the heat supplied by the core of the earth. This makes the magma warm and less dense and rises upward forming convection currents in the mantle.
This convection process is similar to the convection cells that form in the atmosphere, where the hot, less dense air rises up in the atmosphere forming a low-pressure zone. This uprising air forms convection cells, in which the warm air rises and as it rises high in the atmosphere, the temperature becomes low, making the air cold and it eventually sinks.
Answer:
a. by collisions and mergers of planetesimals.
Explanation:
Inner planets are planets within 1.5 AU distance from the sun. These are called terrestrial planets because they are somewhat similar to Earth, mainly made of rocks.
The main ingredient of these planets are solar nebula and interstellar dust condensation of which leads to formation of small rock particles. These particles come close to each other under in the influence of gravity and other forces. As the mass of the particles increase they form planetesimals, these planetesimals eventually merge to form planets.
Answer:
Option D is correct: 170 µW/m²
Explanation:
Given that,
Frequency f = 800kHz
Distance d = 2.7km = 2700m
Electric field Eo = 0.36V/m
Intensity of radio signal
The intensity of radial signal is given as
I = c•εo•Eo²/2
Where c is speed of light
c = 3×10^8m/s
εo = 8.85 × 10^-12 C²/Nm²
I = 3×10^8 × 8.85×10^-12 × 0.36²/2
I = 1.72 × 10^-4W/m²
I = 172 × 10^-6 W/m²
I = 172 µW/m²
Then, the intensity of the radio wave at that point is approximately 170 µW/m²
Answer:
Explanation:
This problem is related to vertical motion, and the equation that models it is:
(1)
Where:
is the rock's final height
is the rock's initial height
is the rock's initial velocity
is the angle at which the rock was thrown (directly upwards)
is the time
is the acceleration due gravity in Planet X
Isolating and taking into account 
:
(2)
(3)
(4) This is the acceleration due gravity in Planet X
1. Describe the problem-solving process that you used to determine the identity of the seven mystery elements. The first step in problem solving is to determine what problem you need to solve. Here it is to identify seven mystery elements. Next is to list those methods you might use to identify your seven mysterious elements and decide which method suits your situation best. Be aware that this chosen method may fail but that's OK it will help in eliminating one of the methods and may give you a few clues. I found that could hold heat and help explode something.
2. Why was the number of valence electrons excluded from the mystery element data provided?Whether they are created by nature or in the lab, chemical substances are all made of some combination of just 118 pure elements. These elements come together to produce an amazing diversity of materials. In this interactive, discover which elements are most abundant in the universe, the sun, and the Earth as well as in the human body and in that flashiest of human creations like fireworks Conclusions With information gained in this activity, discuss the patterns that exist in the periodic table. Mendeleev’s original periodic table was published in 1869. Do you think Mendeleev’s tables, which were based on atomic mass rather than atomic number, accurately predicted the modern positions on the periodic table. Explain. Mendeleev noticed that there appeared to be some elements missing from the periodic table so he left spots for undiscovered elements. Based on his periodic table, he accurately predicted the properties of some of these the unknown elements before their discovery.The arrangement of the periodic table means that the physical properties of the elements follow a regular pattern.
Chemistry6
Conceptual Inquiry ExtensionSuppose you are a chemist that has recently discovered a new element. What information do you need to place this element on the periodic table? Besides periodic table trends discussed in this activity, describe other properties that could be used to position elements on the periodic table.There are a many of properties, including (but not limited to) the element's reactivity with other elements (especially if your mystery element is inert), the element's boiling and melting points, the element's electronegativity (following the rule: all roads lead to F) and the radioactive decaying of that element, i.e., is the element an alpha, beta, or gamma emitter etc.Chemistry7
