Answer:
(4) The physical and chemical properties of these minerals determine how humans use them.
Explanation:
All the materials and the metals found on earth shows certain characteristics naturally or in their physical state. These physical characteristics can be their look, their structure, their color, strength, melting point, boiling point, density, etc.
And chemical properties of the metals are defined as those characteristics or features of the metals that it exhibits when these metals reacts chemically.
The physical properties as well as the chemical properties distinguishes each metal from each other. These properties determines how people use these metals in their life.
Each electron holds 2(n2)
Answer:
5.09 Pa
Explanation:
Area of the circle = πr²
The diameter is given, so 100/2 = 50 m is the radius.
π x 50² = 7854 m²
Pressure = force/area
Pressure = 40000/7854
Pressure = 5.09 Pa
Hope this helps!
Answer:
torque τ = 24 N-m
torque τ = 11.98 N-m
Explanation:
given data
mass of the ball = 1.5 kg
arm length l = 70 cm = 0.7 m
mass of arm = 4 kg
solution
we get here center of mass that is
center of mass =
..........1
center of mass =
center of mass = 0.44545 m
and
torque will be
torque τ = F × r ×sinθ ...........2
torque τ = (4+1.5)9.8 × 0.4454 × sin90
torque τ = 24 N-m
and now we get magnitude of the torque
magnitude of the torque τ = F × r ×sinθ
magnitude of the torque τ = (4+1.5)9.8 × 0.4454 × sin60
magnitude of the torque τ = 11.98 N-m
By Newton's second law, the apparent weight of rider coming at rest is <u>3548 N</u>.
According to formula, v = u + at
a = 39.2 m/
Force, F = ma
F = m(a+g)
F = apparent weight
m = mass, given = 65 kg
a = acceleration, given = 39.2 m/
g = 9.8 m/
Put these values in formula, F = m(a+g)
F = 65(39.2+9.8)
F = 3548 N
Therefore, the apparent weight of rider coming at rest is <u>3548 N</u>.
Learn more about apparent weight here:- brainly.com/question/24897276
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