When a light wave enters into a medium of different optical density,
1 answer:
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Answer:
1.176 N
Explanation:
= mass of the bottle = 0.30 kg
= initial speed of the bottle = 2.8 m/s
= final speed of the bottle = 0 m/s
= stopping distance traveled = 1.0 m
= magnitude of frictional force acting on bottle
Using work-change in kinetic energy theorem
N
direction :
frictional force acts in opposite direction of motion.
Answer:
The speed of ejection is
Solution:
As per the question:
Magnetic field density, B = 0.4 T
Density of the material in the sunspot,
Now,
To calculate the speed of ejection of the material, v:
The magnetic field energy density is given by:
This energy density equals the kinetic energy supplied by the field.
Thus
where
m = mass of the sunspot in =
Answer:
maximumforce is F = mg
Explanation:
For this case we must use Newton's second law,
Σ F = m a
bold indicate vectors, so we will write it in its components x and y
X axis
Fₓ = maₓ
Axis y
Fy - W = m a
Now let's examine our case, with indicate that the bird is level, the force of the wings can have a measured angle with respect to the x axis, where the vertical component is responsible for the lift, let's use trigonometry to find the components
Cos θ = Fₓ / F
Fₓ = F cos θ
sin θ = Fy / F
Fy = F sin θ
Let's replace and calculate
F sin θ -w = m a
As the bird indicates that leveling at the same height, so the vertical acceleration is zero (ay = 0)
F sin θ = w = mg
The maximum value of this equation occurs when the sin=1, in this case
F = mg