What is the author's MAIN purpose for including information about viruses? D to suggest that it could be dangerous for explorers
1 answer:
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Answer:
Initial angular position of the disc is 3 radian
Explanation:
As we know that the angular acceleration of the disc is given as
initial angular speed is given as
now we know that angular displacement of the disc is given as
now we have
Answer:
The required potential difference is .
Explanation:
We know, electric field is nothing but the negative gradiant of potential. Mathematically, in three-dimension,
In one dimension, the magnitude of the electric field is
where '' is the applied voltage and '
'is the distance through which the voltage is applied.
Given, .
So the required potential difference is
Answer:
B
Explanation:
Displacement, velocity, and acceleration are vectors: they have magnitude and direction.
The convention is that "down" is negative and "up" is positive.
Thus, if an object is higher than when it started, its displacement is positive. If it is lower, the displacement is negative.
If it is still going "up", its velocity is positive. If it is falling, its velocity is negative.
1. Displacement
The formula for vertical displacement is
Δy = v₀t - ½gt²
If v₀ = 30 m/s, t = 2 s, and g = 9.8 m·s⁻², then
2. Velocity
The formula for vertical velocity is
v = v₀ - gt
If v₀ = 30 m/s, t = 2 s, and g = 9.8 m·s⁻², then
3. Acceleration
The vertical acceleration is always -g = -9.8 m·s⁻².
The direction of the acceleration is down.
The only option with the sequence "up, up, down" is B.