Answer:2.05 m
Explanation:
Given
Mass of sled 
initial speed 
coefficient of kinetic Friction 
According to work-energy theorem work done by all the forces is change in Kinetic energy

,where d= distance moved



Answer:
The lone pair of electrons occupy more space because the electrostatic force becomes weaker.
Explanation:
When there is a bond pair of electrons in the 2 positively charged the atomic nuclei draw the electron density towards them, thereby reducing the bond diameter.
In the case of the lone pair, only 1 nucleus is present, and the enticing electrostatic force becomes weaker and the intensity of the electrons will be increases. Therefore, the lone pair occupies more space than the pair of bonds.
The numerical value for the acceleration of gravity is most accurately known as 9.8 m/s/s.
Answer:
The two value of the wavelength for the out of tune guitar is

Explanation:
From the question we are told that
The wavelength of the note is 
The difference in beat frequency is 
Generally the frequency of the note played by the guitar that is in tune is

Where
is the speed of sound with a constant value 


The difference in beat is mathematically represented as

Where
is the frequency of the sound from the out of tune guitar

substituting values


The wavelength for this frequency is



For the second value of the second frequency



The wavelength for this frequency is



Levers
Most machines in your body are levers that consist of bones and muscles. Tendons and muscles pull on bones, making them act as levers. Joint, near where tendon is attached to bone acts as fulcrum. Muscles produce input force.