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Gennadij [26K]
2 years ago
10

The Periodic Table Question 4 of 10 If an element forms a 2+ ion, in which group of the periodic table would you expect to find

it? D A. 2 B. 17 O C. 1 D. 18 7​
Physics
1 answer:
zvonat [6]2 years ago
3 0

Answer:

B is the difference قصدي لا انا اعرف بشير بس ما اعرف اخوه يعني *قصدي لا انا اعرف بشير بس ما اعرف اخوه يعني *قصدي لا انا اعرف بشير بس ما اعرف اخوه يعني *قصدي لا انا اعرف بشير بس ما اعرف اخوه يعني *قصدي لا انا اعرف بشير بس ما اعرف اخوه يعني *

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How does water get to the tops of the tallest trees against the force of gravity
alexira [117]
Water gets to the leaves in the tops of the tallest trees by something called the cohesion-tension theory. Water has two very unique properties called adhesion and cohesion. Cohesion is the tendency of water molecules to stick together with one another. The water sticks together, leaving no room for air, strengthening the "force" of the water going up the tree. The water also sticks to the sides of the xylem inside the tree. In addition to these properties, there are also the factors of negative and positive water potential. For more information, look up more details of the cohesion-tension theory. 
4 0
3 years ago
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All known matter is made up of Question 1 options:
Tatiana [17]

the answer is (a) molecules

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3 years ago
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I'll mark brainliest if you help me. :)
BaLLatris [955]

Answer:

gravitational potantional energy

Explanation:

ill try to link a source!

edit: https://flexbooks.ck12.org/cbook/ck-12-middle-school-physical-science-flexbook-2.0/section/14.3/primary/lesson/potential-energy-ms-ps#:~:text=Potential%20energy%20due%20to%20the,is%20called%20gravitational%20potential%20energy.

3 0
3 years ago
A 18 kg rock starting from rest free falls through a distance of 7.0 m with no air resistance. Find the momentum change of the r
IceJOKER [234]
Find the final velocity of the rock first:

The total energy of the rock at rest:
\frac{1}{2} mv_1^2 + mgh_1

The total energy of the rock after 7m:
\frac{1}{2} mv_2^2 + mgh_2

Energy must be conserved:
\frac{1}{2} mv_1^2 + mgh_1 = \frac{1}{2} mv_2^2 + mgh_2 \\ \\ \frac{1}{2} m(v_2^2 - v_1^2) = mg(h_1 - h_2) \\ \\ \frac{1}{2} (v_2^2 - v_1^2) = g(h_1 - h_2) \\ \\ v_1 = 0, \delta h = 7m \\ \\ v_2^2 = 2g(\delta h) \\ \\ v_2 = \sqrt{2g(\delta h)}

Momentum must be conserved also.
Momentum with the ball at rest:
p = m_1v_1 + m_2v_2 \\ m_1 = 18kg \\ m_2 = 6 * 10^{24}kg \\ v_1 = v_2 = 0 \\ \\ p = 0

The total momentum is zero with the ball at rest and must remain zero.

Momentum with the ball at 7m:
p = m_1v_1 + m_2v_2 = m_1\sqrt{2g(\delta h)} + m_2v_2 = 0

Solving for the earth's velocity v₂:
v_2 = -  \frac{m_1}{m_2} \sqrt{2g(\delta h)}
7 0
3 years ago
As a falling apple approaches the ground it’s potential energy ?
ella [17]

Answer:

Decreases

Explanation:

The potential energy of an object is how much energy that object COULD release. When in reference to falling objects, the formula for the potential energy of an object is mgh, where m is the mass in kilograms, g is the acceleration, and h is the height. This is why, as the height of an object decreases, so does its potential energy. Hope this helps!

8 0
3 years ago
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