Answer:
Explanation:
Given
Rocket attain a velocity of in a time period of
It was brought jarringly back to rest in only
Acceleration is the change in velocity of the object over a period of time
(a) Acceleration in his direction of motion
(b) acceleration opposite to his direction of motion i.e. deceleration is
Wavelength = (speed) divided by (frequency) = 10/0.5 = <span>20 </span>
Answer:
option (c)
Explanation:
Fundamental frequency of segment A = f
Second harmonic frequency of B = fundamental frequency of A .
Tension in both the wires is same and the mass density is also same as the wires are identical.
fundamental frequency of wire A is given by
.... (1)
Second harmonic of B is given by
.... (2)
Equation (1) is equal to equation (2), we get
So, LB = 2 L
Thus, the length of wire segment B is 2 times the length of wire segment A.
In,radioactive decay,the half-life is the length of time after which there is a 50 percent chance that an atom will have undergone nuclear decay.It varies depending on the atom type and isotope,and is usually determined experimentally.
Assuming the scooter is moving horizontally on a flat surface, then by Newton's second law, the vertical forces (the normal force and the scooter's weight) cancel out:
<em>n</em> - <em>w</em> = 0
<em>n</em> = <em>w</em>
<em>n</em> = (120 kg) <em>g</em> = 1176 N
(where <em>g</em> = 9.8 m/s²)
Then the friction force has a magnitude of
<em>f</em> = <em>µ</em> <em>n</em>
where <em>µ</em> is the coefficient of kinetic friction, so that
<em>f</em> = 0.4 (1176 N) = 470.4 N ≈ 470 N