You hear a tone and recognized it to me 512 Hz and you know that the speed of sound
1 answer:
Answer:
Explanation:
The frequency equation is
where f is frequency measured in Hz, v is velocity of sound measured in m/s and is wavelength measured in meters. Filling in our given info:
and
so
(That is the incorrect number of sig dig's by the way. It should only be 2 since the number 340 only has 2 sig dig's)
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Answer:
Option (B)
Explanation:
L = 0.5 H, I = 2 A, R = 10 Ohm
V = I R
In case of dc the inductor cannot works.
V = 2 x 10 = 20 V
Electrons carry a negative charge.
Answer:
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Newtons 3.law: Action = Reaction
If a body exerts a force on a rope of 400 N the rope exerts a force on the body of 400N also. So the tension in the rope is 400N. See pictures below.
Given a = 10 cm/s²
u = 0 cm/s
v = 50 cm/s
we know that
v²=u²+2aS
2500=2×10×S
2500÷20 = S
S= 125 cm
The ramp is 125 cm