Answer: C
Explanation:
Chemical formula of any element, chemical or compound contains the symbol of the elements involved, the number of molecules and the number of atoms present as a subscript.
For instance, Nacl is a chemical formula for sodium chloride. The chemical combination of sodium and chlorine. While Hcl is a chemical formula for hydrochloric acid - the chemical combination of hydrogen and chlorine.
According to the question given above,
The symbol of each element in the substance is one of the part of the chemical formula.
Answer:
<h3>40.0 Joules. None of the answers is correct</h3>
Explanation:
Kinetic energy of an object is expressed as;
KE = 1/2mv² where;
m is the mass of the object
V is the velocity of the object.
Let Ma be the mass of the basketball and Mb be the mass of baseball.
If the mass of the basketball shown below is 4 times the mass of the baseball, then Ma = 4Mb
KE of the basket ball = 1/2MaVa²
Va² = 2(KE)a/Ma ...... 1
KE of the baseball = 1/2MbVb²
Vb² = 2(KE)b/Mb .......... 2
Since their velocities are the same, hence Va²= Vb²
2(KE)a/Ma = 2(KE)b/Mb
Substituting Ma = 4Mb into the resulting expression.
2(KE)a/4Mb = 2(KE)b/Mb
2(KE)a/4 = 2(KE)b
Given Kinetic energy of baseball (KE)b = 10.0J, the expression becomes;
2(KE)a/4 = 2(10)
2(KE)a = 4*20
2(KE)a = 80
(KE)a = 80/2
(KE)a = 40.0J
Hence the kinetic energy of the basketball is 40.0Joules
From sea level to the top of the atmosphere, a column of air with a 1-m2 cross section weighs 101,000 N.
To find the answer we have to know about the pressure.
<h3>
What is Pressure?</h3>
- The pressure at a point on a surface is the thrust acting per unit area around that point.
- A particular mass of air is contained in a column that rises from the ocean to the top of the atmosphere. Then,
Pa is the atmospheric pressure at the sea level.
- By combining both the equations, we get the weight of air,
Thus, we can conclude that, the weight of air in a column 1-m2 in cross section that extends from sea level to the top of the atmosphere is 101300N.
Learn more about the pressure here:
brainly.com/question/24818722
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Because it tends to be hotter inside therefore when the cold air hits the inside of the glass, the cold glass makes it condense however outside its cold therefore it does condense on the outside of the window
Answer:
Resultant horizontal force = 143 N
Explanation:
Since the a gle is 30° northwest, then it means the resultant force will be horizontal and as such;
Resultant horizontal force = 165 * cos 30
Resultant horizontal force = 142.89
Approximating to a whole number gives;
Resultant horizontal force = 143 N
