The spiral spring of a spring balance is 25.0cm long when...
The spiral spring of a spring balance is 25.0cm long when 5N hangs on it and 30cm long, when the weight is 10N. What is the length of the spring if the weight is 3N assuming Hooke's law is obeyed?
15.0cm
17.0cm
20.0cm
23.0cm
Correct answer is D
let the length be Lcm
\(\frac{5 - 3}{25 - L}\) = \(\frac{10 - 5}{30 - 25}\)
L = 23cm
Which of the following are True for \(\alpha\)-decay. i. mass number, decrease by four. ii. Atom...
Which of the following does NOT describe the image formed by a plane mirror? ...
Semiconductor is a class of solid whose conductivity increases with an increase in ...
The angle at which a projectile must be fired to cover maximum range is ...
The rise or fall of a liquid in a narrow tube is because of the ...
The vibration of an air column produces the sound in the ...
The energy in the nucleus of atoms produce heat which can be used to generate ...
If an object is placed in front of two mirrors inclined at 90o, how many images will be formed?...