Answer:
laser wavelength = 549.5 nm
Explanation:
Given data
separation d = 0.170 mm = 0.170 ×
m
interference pattern distance D = 4.95 m
two adjacent bright interference width w = 1.60 cm = 1.60 ×
m
to find out
laser's wavelength
solution
we know that fringe width formula that is
width = wavelength × distance / separation
we put all these value here to find wavelength
wavelength = 1.60 ×
× 0.170 ×
/ 4.95
wavelength = 549.5 nm
so laser wavelength = 549.5 nm
The ratio p/T is constant. So, you'd get 273*0.40/400
Answer:
Velocity of skater after throwing the snowball is 2.57 m/s
Explanation:
Given :
Mass of skater, M = 62.2 kg
Mass of snowball, m = 0.145 kg
Velocity of snowball relative to ground, v = 39.3 m/s
Consider v₁ be the velocity of skater after throwing the snowball.
According to the problem, initially the velocity of skater and snowball is same. So,
Velocity of skater before throwing snowball, u = 2.66 m/s
Applying conservation of momentum,
Momentum before throwing snowball = Momentum after throwing snowball
(M + m) u = Mv₁ + mv

Substitute the suitable values in the above equation.

v₁ = 2.57 m/s
<span>The simplest way to test the effects of mass is to compare the results of two trials that are identical except for the mass of the balls. In the language of experimental design, we say that the mass is the "variable of interest" for this experiment, and we therefore hold the other variables (size and height) constant so that they cannot affect the results.</span>