Answer:0.46
Explanation:
Given
Initial height 
inclination 
Thrust
combined mass of kieran and skis 
Speed at the bottom 
From Work Energy Theorem
Work done by all the force is equal to change in kinetic Energy
------------1
distance traveled along the slope 



substitute in 1




Answer:
0.3376 mm
Explanation:
The computation of the spacing in mm between the slits is shown below:
As we know that

where,
= wavelength
L = distance from the scrren
= spanning distance
As there are 11 bright fingers seen so m would be
= 11 - 1
= 10
Now placing these values to the above formula
So, the spacing is

= 0.3376 mm
We simply applied the above formula.
Answer:
200 km/hr
Explanation:
Since he goes 80km per hour, multiply this by 2.5 or two and a half hours.
80 x 2.5 = 200 km/hr.
Explanation:
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