1/2mv^2
1/2x12x10^2=600J
The kinetic energy is 600J
Answer:
81.6 ohm
Explanation:
For a cable type conductor, the resistance is given by the following formula:
Where:
The problem doesn't give us additional information about resistivity or the cross section of the wire, so let's assume:
Then, in this case, the resistance of the cable depends only on the length. Therefore, if its resistance was originally 27.2 ohms, if we triple its length, it makes sense that its new resistance is three times the original. Thus:
Answer:
Explanation:
Given
mass of each arrow=0.1 kg
velocity of arrow=30 m/s
One arrow is fired u=due to east and another towards south
Momentum of first arrow
Total momentum P
magnitude 
direction
clockwise w.r.t to east
625 /5=125/5=25/5=5
1000/5=200/5=40/5=8
is 5 Over 8
Answer:
Air.
Explanation:
To know which option is correct, let us consider the relationship between velocity and the wavelength of a wave. This is illustrated below:
Velocity, wavelength and frequency are related by the following equation:
Velocity = wavelength × frequency
v = λf
From the equation above, we can see clearly that the velocity is directly proportional to the wavelength.
This means that an increase in the wavelength will lead to an increase in the velocity and also, a decrease in the wavelength will lead to a decrease in the velocity.
Now, considering the table given in the question above, we can see that the wave has a higher speed in air. This simply means that the wave will also have a higher wavelength in air.
Thus, the correct answer to the question is: air
