Answer:
a) 1.95 m/s
b) 5.56 m
Explanation:
Given that:
Velocity of the skier 
= 14.3 m/s
For the skier moving in the direction of the wave, we have:
Period (T) = 0.450 s
Relative velocity (V) of the skier in regard with the wave = 
where:
= velocity of the skier
= velocity of the wave
The wavelength 
can be written as:
---------------> Equation (1)
For the skier moving opposite in the direction of the wave, we have:
Period (T) = 0.342 s
Relative velocity (V) of the skier in regard with the wave = 
The wavelength can be written as:
------------------> Equation 2
Equating equation (1) and equation (2) and substituting = 14.3 m/s ; we have:
Collecting the like terms; we have:
b)
The Wavelength of the wave can be calculated using : 
λ ≅ 5.56 m
Answer:
Fossil fuels take millions of years to replenish
A rifle has a mass of 2. 5 kg. if it is loosely gripped and a 1. 5-g bullet is fired from it with a muzzle velocity of 1400 m/s. The recoil velocity of the rifle just after firing is 0.840 m/s.
Rifle
A rifle is a long-barreled gun with a helical pattern of grooves (rifling) etched into the bore wall that is intended for precise shooting. Rifles are often made to be handled with both hands and stabilized on the shooter's shoulder by a buttstock, in line with their emphasis on accuracy. Armed conflict, self-defense, law enforcement, criminal activity (most notably assassinations), hunting, and shooting sports all make substantial use of rifles.
To learn more about the rifle refer here:
brainly.com/question/23906255
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