Answer:
Current would decrease 9 times.
Explanation:
Assume all others (potential difference U, resistivity ρ, and length L) are the same, only change in the diameter, we would have the following ratio
So the current would decrease 9 times.
A 0.14 kg baseball moving at 23.00 m s is slowed to a stop by a catcher who exerts a constant force of 370 N How long does it ta
1 answer:
Answer:
(A) The time taken for the ball to stop is 8.7 x 10⁻³ s
(B) The distance traveled by the baseball before stopping is 0.3 m
Explanation:
Given;
mass of the baseball, m = 0.14 kg
velocity of the baseball, v = 23 m/s
force exerted on the baseball by the catcher, F = 370 N
(A) The time taken for the ball to stop;
(B) The distance traveled by the baseball before stopping is calculated as;
acceleration of the ball,
Distance traveled, s;
s = ut + ¹/₂at²
s = (23)(8.7 x 10⁻³) + ¹/₂(2643.678)(8.7 x 10⁻³)²
s = 0.2001 + 0.1001
s = 0.3 m
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Answer:
λ = 2 m
f = 100 Hz
Explanation:
When struck in the middle an anti-node is formed at the center, So you can derive,
f = frequency of the fundamental mode in producing standing waves
l = resonating length
T = tension of the wire
m = linear density of the wire
(check the attachment)
By substituting,
f = 100 Hz
Wavelength is twice the vibrating length, its in the section standing waves and using that only the equation is derived.
Imagine what happens when two identical waves in opposite direction superimpose. There will be 3 nodes and two anti-nodes where the distance between two nodes is half the wavelength.
The same case happen here, the transverse sound wave traveling along the wire get reflected by a bridge and bounce back on itself where superposition takes place. So two nodes are at the bridges hence the twice of the distance between bridges is the wavelength of the sound wave.