Physical education is a component of education that challenges students by providing opportunities to attain the skills and knowledge to be physically active as part of a healthy lifestyle. Demonstrates a variety of physical skills through movement activities.
-from google.
Answer:
W = 307.45 joules
Explanation:
the work done is defined as the product of force applied in the direction of displacement and the displacement.
Use the formula for work directly
(work) = (force) x (displacement)
Work is a scalar quantity and its SI unit is Joule.
W = F x d
F = 71.5 N
d = 4.30 m
W = 71.5 × 4.30
W = 307.45 joules
Answer:
It gets refracted.
Explanation:
When light beam travels through different mediums they refract i.e. they change their direction. Here the angle of incidence is less than 90°. After entering the glass slab the light beam will move towards the normal (a line drawn perpendicular to the interface of the two mediums). Thus the angle of refraction will be even lesser than angle of incidence.
Answer:
The seed as a fraction of the speed of light is 
Solution:
As per the question:
Suppose, 
be the rate of an identical clock between two time intervals.
For a moving clock, moving with velocity 'v', at the clock tick of four-fifth:
t = 
Now,
Using the relation of time dilation, from Einstein's relation:
Squaring both sides:
Radio waves have the lowest radiant energy, hope this helps :]
