Answer:
1.5 m
Explanation:
Using the law of conservation of energy
Gain in potential energy by the skateboarder= Loss in kinetic energy by the skateboarder
PE=KE where KE represent potential energy, PE represent potential energy
where m is mass of skateboarder and v is velocity of skateboarder
PE=mgh where m is the mass of skateboarder, g is acceleration due to gravity which in this case is taken as
and h is the highest point reached by the skateboarder. Equating PE=KE we have
and since m are on both LHS and LHS, the cancel
} and making h the subject of the above formula
![h=\frac {0.5v^{2}}{g}](https://tex.z-dn.net/?f=h%3D%5Cfrac%20%7B0.5v%5E%7B2%7D%7D%7Bg%7D)
Substituting v with 5.4 m/s and g as
we obtain
![h=\frac {0.5*(5.4 m/s)^{2}}{9.81}=1.486238532 m](https://tex.z-dn.net/?f=h%3D%5Cfrac%20%7B0.5%2A%285.4%20m%2Fs%29%5E%7B2%7D%7D%7B9.81%7D%3D1.486238532%20%20m)
Rounded off, h=1.5 m
Answer:
a)speed of light.
a)speed of light×time=distance.
Explanation:
light has a constant speed of 299,792,458m/s
Answer:
The period of oscillation is 1.33 sec.
Explanation:
Given that,
Mass = 275.0 g
Suppose value of spring constant is 6.2 N/m.
We need to calculate the angular frequency
Using formula of angular frequency
![\omega=\sqrt{\dfrac{k}{m}}](https://tex.z-dn.net/?f=%5Comega%3D%5Csqrt%7B%5Cdfrac%7Bk%7D%7Bm%7D%7D)
Where, m = mass
k = spring constant
Put the value into the formula
![\omega=\sqrt{\dfrac{6.2}{275.0\times10^{-3}}}](https://tex.z-dn.net/?f=%5Comega%3D%5Csqrt%7B%5Cdfrac%7B6.2%7D%7B275.0%5Ctimes10%5E%7B-3%7D%7D%7D)
![\omega=4.74\ rad/s](https://tex.z-dn.net/?f=%5Comega%3D4.74%5C%20rad%2Fs)
We need to calculate the period of oscillation,
Using formula of time period
![T=\dfrac{2\pi}{\omega}](https://tex.z-dn.net/?f=T%3D%5Cdfrac%7B2%5Cpi%7D%7B%5Comega%7D)
Put the value into the formula
![T=\dfrac{2\pi}{4.74}](https://tex.z-dn.net/?f=T%3D%5Cdfrac%7B2%5Cpi%7D%7B4.74%7D)
![T=1.33\ sec](https://tex.z-dn.net/?f=T%3D1.33%5C%20sec)
Hence, The period of oscillation is 1.33 sec.
Answer:
<em>The atoms in the hot bodies have higher kinetic energy than those of the cold bodies. Thus to maintain thermal equilibrium, the atoms of higher kinetic energy tries to move and collide with the atoms of low kinetic energy. Thus heat transfers from a hot body to a cold body.</em>
<em>Explanation:</em>
<em>Explanation:The atoms in the hot bodies have higher kinetic energy than those of the cold bodies. Thus to maintain thermaler kinetic energy tries to move and collide with the atoms of low kinetic energy. Thus heat transfers from a hot body to a cold body. </em>
Answer:
Water falls from a reservoir through a channel to a turbine. The water turns the turbines, which allows the generator to make electricity.
It is falling instead of flowing, because elavation is an important part of the hydroeletric power plant, since gravity is a thing, and there was elevation, than it would be falling and not flowing.