Which of the following is equal to the boyant force of a rock placed in a beaker of water?
2 answers:
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Answer:
The strength of the magnetic field is 0.08 mT
Explanation:
Given:
Length of rod m
Velocity of rod
Induced emf V
According to the faraday's law
We know that the induced emf of rod is given by,
Where magnetic field
For finding the magnetic field,
mT
Therefore, the strength of the magnetic field is 0.08 mT
Answer:
a = 1 m/s² and
Explanation:
The first two parts can be seen in attachment
We use Newton's second law on each axis
Y axis
Ty - W = 0
Ty = w
X axis
Tx = m a
With trigonometry we find the components of tension
Sin θ = Ty / T
Ty = T sin θ
Cos θ = Tx / T
Tx = T cos θ
We calculate the acceleration with kinematics
Vf = Vo + a t
a = (Vf -Vo) / t
a = (20 -10) / 10
a = 1 m/s²
We substitute in Newton's equations
T Sin θ = mg
T cos θ = ma
We divide the two equations
Tan θ = g / a
θ = tan⁻¹ (g / a)
θ = tan⁻¹ (9.8 / 1)
θ = 84º
We see that in the expression of the angle the mass does not appear therefore you should not change the angle
