Answer:
Explanation:
mass of charged particle m = 6 x 10⁻³ kg .
speed of particle v = 4 x 10³ m /s
speed of particle perpendicular to magnetic field = v sin37
= 4 x 10³ sin37
= 2.41 x 10³ m / s
Force on charged particle
= B q v , B is magnetic field , q is charge on particle and v is velocity perpendicular to B
Force = ma
= 6 x 10⁻³ x 8
= 48 x 10⁻³
Force = Bqv
48 x 10⁻³ = 5 x 10⁻³ q x 2.41 x 10³
q = 48 x 10⁻³ / (5 x 2.41)
= 3.98 x 10⁻³C.
Answer: C
Period/ Period of the pendulum.
Content:
Simple pendulum is a small diameter bob which is suspended from light cord or string. The string is strong enough to stretch.
Pendulums are quiet common in use such as clocks, swings etc.,
From the simple pendulum we can find conditions under which it performs simple harmonic motion and we can also derive the expressions for Period of pendulum, frequency etc.
<em>Period of a pendulum/Time period is given by the following expression</em>
<em> </em><em> T =2π.√(L/g) seconds </em>
<em> </em><em>T = period of pendulum in seconds</em>
<em> L = Length of the string/cord in meters</em>
<em> g = gravitational force in m/s² ( g = 9.8 m/s² )</em>
<em>Period of pendulum is independent on mass of the bob.</em>
<em>So, The relation between length of the cord and gravity is used to determine the period of pendulum</em>
As we know that as per Newton's II law we have
here we will have
= change in momentum
= time interval in which momentum is changed
now in order to have least injury during jumping we need to have least force on the jumper
so in order to have least force we can say that the momentum must have to change in maximum time so that amount of force must be least
So we need to increase the time in which momentum of the system is changed
Let the Blaise runs for time "t" to complete the race
so the total distance he moved is given by
Now Issac runs for time t = "t - 2*60"
because it took rest for 2 minutes
now it is given that Blaise wins by 10 m distance
now the distance moved by Blaise is given by
The correct answer is: [D]:
__________________________________________________________
"The amount of pressure exerted by a solid is solely dependent on its mass."
__________________________________________________________
