I believe that the answer is B.
Answer:
354.72 m/s
Explanation:
= mass of lead bullet
= specific heat of lead = 128 J/(kg °C)
= Latent heat of fusion of lead = 24500 J/kg
= initial temperature = 27.4 °C
= final temperature = melting point of lead = 327.5 °C
= Speed of lead bullet
Using conservation of energy
Kinetic energy of bullet = Heat required for change of temperature + Heat of melting
Answer:
The capacitance is
Explanation:
From the question we are told that
The induction of the LC circuit is
The frequency is
The natural frequency is mathematically represented as
Where C is the capacitance So
=>
substituting values
Answer:
215.6Nm
Explanation:
The figure below shows a 10-kg mass hung from the end of a rod that is 2.2 m in length. Find the magnitude of the torque produced by the hung mass (m)
Torque = Force × radius
Torque = mg × radius
Torque = 10(9.8) × 2.2
Torque = 98 × 2.2
Torque = 215.6Nm
Answer:
Explanation:
a ) If x be the position of n the bright fringe on the screen , following formula holds .
x = n (λD / d) ; λ is wave length , D is screen distance and d is slit separation .
If we increase the value of λ or wave length, x will increase so central fringe along with all the fringes will shift away from the centre .
If we increase the value of D or screen distance , it will also increase x , so fringes along with central fringe will shift away from the center.
b ) Fringes ,whether bright or dark , both shift together , either towards or away from the center .
So to move the dark spots towards the center , we need to do the opposite to what we did in the first case , ie decrease the wavelength or decrease the screen distance .