Answer:
8.66 nano seconds
Explanation:
speed of k mesons ( v ) = c 
m/s
Distance between counters ( d ) = 9.00 m
number of countable electrical pulses = 1000 counts in first counter and 250 in second counter
time of travel = d / v = 18 / 
secs
Next write the decay of particles in lab frame
finally calculate the half life of Meson in its own frame
( t 1/2) of meson in its own frame = 8.66 n-secs
attached below is a detailed solution
Answer:
No work is done yet
Explanation:
Given data
Weight of the load=50kg
Distance= 0 meter ------------Standing on one point
Normally, work is said to be done when we apply a force/carry a load through a distance, since the person is standing and not moving through a distance, no work is done
Hence
Work done= 50*0= 0 joules
Answer:
At 5km/hr; Hypnotist travels with a higher speed.
Explanation:
Let hypnotist be H while Raul be R.
Given the following data;
Distance H = 5km
Time H = 1 hour
Distance R = 5km
Time R = 2 hours
To find the their respective speed;
a. For H;
Speed = distance/time
Speed H = 5/1
Speed H = 5km/hr
b. For R;
Speed = distance/time
Speed R = 5/2
Speed R = 2.5 km/hr
Therefore, hypnotist travels with a higher speed.
