Answer:
Refractive index of unknown liquid = 1.56
Explanation:
Using Snell's law as:
Where,
is the angle of incidence ( 65.0° )
is the angle of refraction ( 53.0° )
is the refractive index of the refraction medium (unknown liquid, n=?)
is the refractive index of the incidence medium (oil, n=1.38)
Hence,
Solving for ,
Refractive index of unknown liquid = 1.56
Answer:
x component is 60.60 N and y component is 35 N ⇒ answer A
Explanation:
A boy is pulling a wagon with a force of 70.0 N directed at an angle
of 30 degrees above the horizontal then,
is the horizontal component of the force in the direction
of positive part of x-axis
is the vertical component of the force force in the direction
of positive part of y-axis
The x component of the force is the force multiplied by
cos(30)°
The y component of the force is the force multiplied by
sin(30)°
→ The x component = F cos(30)
→ The x component = 70 cos(30) = 60.60 N
→ The y component = F sin(30)
→ The y component = 70 sin(3) = 35 N
<em>x component is 60.60 N and y component is 35 N</em>
Answer:
Average speed of Olympic runner will be 23.08 km/hr
Explanation:
We have given distance d = 27.3 miles
We know that 1 mile = 1.6 km
So 27.3 mile =
Given time = 2 hour 45 minutes and 35 sec
We know that 1 hour = 60 minutes
So 45 minutes
We also know that 1 hour = 3600 sec
So 1 sec
So total time t =
We know that speed