Answer:
92704.5 J
596.44737 N
Explanation:
m = Mass of person + bicycle = 75 kg
g = Acceleration due to gravity = 9.81 m/s²
h = Vertical height = 126 m
= Angle = 7.7°
d = Diameter = 0.388 m
Work done against gravity is given by
![P=mgh\\\Rightarrow P=75\times 9.81\times 126\\\Rightarrow P=92704.5\ J](https://tex.z-dn.net/?f=P%3Dmgh%5C%5C%5CRightarrow%20P%3D75%5Ctimes%209.81%5Ctimes%20126%5C%5C%5CRightarrow%20P%3D92704.5%5C%20J)
Work done is 92704.5 J
Force required is given by
![F=\dfrac{mgrsin\theta}{\pi d}\\\Rightarrow F=\dfrac{75\times 9.81\times sin7.7\times 5.12}{\pi\times 0.388}\\\Rightarrow F=596.44737\ N](https://tex.z-dn.net/?f=F%3D%5Cdfrac%7Bmgrsin%5Ctheta%7D%7B%5Cpi%20d%7D%5C%5C%5CRightarrow%20F%3D%5Cdfrac%7B75%5Ctimes%209.81%5Ctimes%20sin7.7%5Ctimes%205.12%7D%7B%5Cpi%5Ctimes%200.388%7D%5C%5C%5CRightarrow%20F%3D596.44737%5C%20N)
The force is 596.44737 N
Answer:
0.087976 Nm
Explanation:
The magnetic torque (τ) on a current-carrying loop in a magnetic field is given by;
τ = NIAB sinθ --------- (i)
Where;
N = number of turns of the loop
I = current in the loop
A = area of each of the turns
B = magnetic field
θ = angle the loop makes with the magnetic field
<em>From the question;</em>
N = 200
I = 4.0A
B = 0.70T
θ = 30°
A = π d² / 4 [d = diameter of the coil = 2.0cm = 0.02m]
A = π x 0.02² / 4 = 0.0003142m² [taking π = 3.142]
<em>Substitute these values into equation (i) as follows;</em>
τ = 200 x 4.0 x 0.0003142 x 0.70 sin30°
τ = 200 x 4.0 x 0.0003142 x 0.70 x 0.5
τ = 200 x 4.0 x 0.0003142 x 0.70
τ = 0.087976 Nm
Therefore, the torque on the coil is 0.087976 Nm
No. That's the description of the wave's 'frequency'.
Refraction of a wave is its behavior when it crosses
the boundary between two different media.
Matter is radioactive and decays over time
Henri Becquerel discovered that <span>uranium salts spontaneously emit a penetrating radiation that can be registered on a photographic plate.
hope this helps</span>
3.
If the reaction forms a new substance it's a chemical reaction.