Which material would you take, steel or bricks to design a bridge? Why?
2 answers:
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Answer:
The angle above horizontal is 13.3°.
Explanation:
The angle can be calculated with Newton's third law:
Where:
ΣF: is the forces acting on the object
m: is the mass of the object = 6.00 kg
a: is the acceleration of the object
The only force acting on the object is the weight since there is no friction, so:
(1)
Where:
θ: is the angle
g: is the acceleration due to gravity = 9.81 m/s²
We can find the acceleration from the following kinematic equation:
Where:
: is the final speed = 3.00 m/s
: is the initial speed = 0 (the block starts from rest)
d: is the distance traveled = 2.00 m
The acceleration is:
Finally, the angle is (equation 1):
Therefore, the angle above horizontal is 13.3°.
I hope it helps you!
<u><em>Emission current = 0.035 A</em></u>
This question falls under the topic of thermionic emission.
We are given;
Surface Area; a = 0.157 cm² = 0.157 × 10⁻⁴ m²
Temperature; T = 110 K
Area; A = 100 A/m²/k²
Work function; Φ = 1.04 eV
Formula for emission current density is;
J = AT²
where b is a constant = 665Φ
Plugging in the relevant values to get;
J = 100 × 110² ×
J = 2250.3886 amp/m²
Formula for emission current is;
Emission Current = J × a
Emission current = 2250.3886 × 0.157 × 10⁻⁴
<em>Emission current = 0.035 A</em>
Read more at; brainly.in/question/7086684
Answer:
The current through the block is 40.8mA
Explanation:
For question a we can apply the macroscopic form of Ohm's law:
where:
V= potential difference
R= The resistance of the block
substituting the values on the formula we have: