As the bumblebee approaches me, the frequency of sound becomes higher than the 152 Hz because of the velocity with which the bee approaches at 3 m/s.
The speed of the bee causes me to detect an increase of frequency higher than 152 Hz.
This phenomenon is called Doppler Effect.
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Answer: c) 1.31 × 10⁴N
Explanation:
Centripetal force is a force that causes a body to move in a circular path. The body possesses a centripetal acceleration.
According to newtons first law
Force = mass (m) ×acceleration (a)
Acceleration of a body moving in a circular path = v²/r where;
v is the velocity and r is the radius
Force = MV²/r
Given m = 250kg v = 96.5km/hr r = 13.7m
We need to convert 96.5km/hr to m/s
= 96.5km ×1000/1hr × 3600
= 96,500/3,600
v = 26.8m/s
Force = 250 × 26.8²/13.7
Force = 13,106.5N
The centripetal force = 13,106.5N
= 1.31 × 10⁴N
Answer:
1.
-Deflection force
2.q-Charge
3.v-Velocity of the charge
4.B-Perpendicular magnetic field strength
Explanation:
We are given that magnetic deflection
We have to match each symbol in formula with what it represents.
In this formula
Deflection force
q=Charge of particle
v=Velocity of charge
B=Perpendicular magnetic field strength
Therefore,
1.-Deflection force
2.q-Charge
3.v-Velocity of the charge
4.B-Perpendicular magnetic field strength
The reversing of the magnet polarity will explain the different current reading.
Answer: Option D
<u>Explanation:</u>
According to Faraday's law of inductance, whenever a bar magnet is moved toward a stationary coil at constant speed, current will be generated in that coil. So in this case, the first maximum current in the above situation say A is recorded successfully.
Similarly, when the arrangement is kept as it is, in situation B, the current is observed to have different reading. This may be because of the polarity of the magnet would have changed leading to different current reading.
Answer:
22m/s
Explanation:
Mass, m=60 kg
Force constant, k=1300N/m
Restoring force, Fx=6500 N
Average friction force, f=50 N
Length of barrel, l=5m
y=2.5 m
Initial velocity, u=0
Substitute the values
m
Work done due to friction force
We have 
Substitute the values
Initial kinetic energy, Ki=0
Initial gravitational energy, 
\
Initial elastic potential energy
Final elastic energy,
Final kinetic energy, 
Final gravitational energy, 
Final gravitational energy, 
Using work-energy theorem
Substitute the values
