Answer:
<h2>the car must move with the speed</h2><h2>
</h2>
Explanation:
As we know that the momentum of the car and truck is same
so as per the formula of momentum we have
so we have
so we will have
So the car must move with the speed
The total energy of the system is always conserve, therefore at all the point A, B & C the total energy of the skater is same.
Kinetic energy is directly proportional to the velocity, as the skater reaches the top of the pipe, the velocity of the skater would be zero, so there would be no kinetic energy, as he progress down the pipe the velocity of the skater increases, thus kinetic energy increase and highest at the bottom of the pipe, therefore the increasing order of the kinetic energy is C>B>A.
Potential energy is dependent on the height, as the height increases potential energy will also increase. therefore the increasing order of the potential energy is A>B>C.
Answer:
7500 m/s
Explanation:
We can use the equation velocity of a wave equals wavelength times frequency. Therefore, v = wavelength*f = (25 m)(300 Hz) = m/s7,500
Answer:
According to Wien’s Law:
where;
is the wavelength
T(K) is the temperature in Kelvin
Putting the values given in the above equation:
<u><em>T(K) = 0.966×</em></u>
Answer:
η = 0.7
Explanation:
The refractive index of the material can be calculated by using the following formula:
where,
η = refractive index of the material = ?
c = speedof light in vaccuum = 3 x 10⁸ m/s
v = speed of light in this material = 4.3 x 10⁸ m/s
Therefore,
<u>η = 0.7</u>