Answer:
By the why,metals have important characteristics.Conductivity By saying that metals are good conductor of heat/electricity we mean that metal allow heat/electricity to pass through them easily. ....Ductility The property which allows the metals to be drawn into thin wires is called ductility.
Explanation:
Answer:
Explanation:
Lightning is seen before the thunder is heard because , velocity of light exceeds velocity of sound. We also know that velocity , wavelength and frequency are related as follows
velocity = frequency x wavelength
velocity of light > velocity of sound
frequency of light x wavelength of light > frequency of sound x wavelength of sound
But given wavelength of light = wavelength of sound
Putting this relation in the equation above
frequency of light x wavelength of light > frequency of sound x wavelength of light
cancelling out equal terms on both sides
frequency of light > frequency of sound
frequency of light will be greater than frequency of sound.
Answer:
-3.396 m/s or 3.465 m/s
Explanation:
v = Speed of sound in air = 343 m/s
= Relative speed of the singer
f = Observed frequency
f' = Actual frequency
1% change can mean
From the Doppler effect equation we have
The velocity is -3.396 m/s
when
The velocity is 3.465 m/s
Answer:
Induced emf is equal to 0.05 volt
Explanation:
We have given length of the solenoid l = 25 cm = 0.25 m
Radius of the solenoid r = 2.3 cm = 0.023 m
Area of the solenoid
Number of turns N = 580
Inductance of the solenoid
Rate of change of current
Induced emf in inductor is equal to
If the twin in the spaceship travels at a speed close to the speed of light, seen from Earth, the time of the traveling twin passes very slowly. Therefore, upon returning to Earth, less time has passed for him, compared to the twin who remains on Earth, that is, he is younger, while the twin who remains on Earth is older.