Answer:
3.32 m/s
Explanation:
From the law of conservation of energy, the sum of mechanical and kinetic energy should be equal to the 10 J given. Potential energy is given by mgh where m is mass, g is acceleration due to gravity and h is the height. For this case, and l is string length, given as 2 m, \theta is given as 50 degrees. Kinetic energy is given by
and it is this velocity that is unknown.
Answer:
Final temperature,
Explanation:
Given that,
Mass of silver ring, m = 4 g
Initial temperature,
Heat released, Q = -18 J (as heat is released)
Specific heat capacity of silver,
To find,
Final temperature
Solution,
The expression for the specific heat is given by :
So, the final temperature of silver is 21.85 degrees Celsius.
Complete Question
The complete question is shown on the first uploaded image (reference for Photobucket )
Answer:
The electric field is
Explanation:
From the question we are told that
The linear charge density on the inner conductor is
The linear charge density on the outer conductor is
The position of interest is r = 37.3 mm =0.0373 m
Now this position we are considering is within the outer conductor so the electric field at this point is due to the inner conductor (This is because the charges on the conductor a taken to be on the surface of the conductor according to Gauss Law )
Generally according to Gauss Law
=>
substituting values
The negative sign tell us that the direction of the electric field is radially inwards
=>