Answer:
6.17 m
Explanation:
We are given that
Initial speed of rubber ball, u=12 m/s
Total height, h=7 m
Initial speed of second ball, u'=0
We have to find the height at which the two balls collide.
Let first rubber ball and second ball strikes after t time.
For first ball
Distance traveled by first ball in time t
Substitute the value
...(1)
Distance traveled by second ball in time t
.....(2)
Using equation (2) in equation (1) we get
sec
Now, using the value of t
S=6.17 m
Hence, at height 6.17 m the two balls collide .
Answer:
That's simply because any electromagnetic wave longer than a microwave is called a radio wave. Microwaves: Obviously used for cooking in microwave ovens, but also for transmitting information in radar equipment. Microwaves are like short-wavelength radio waves. Typical size: 15cm (the length of a pencil).
Answer:
e) 0.099
Explanation:
For an adiabatic transformation, we have:
where
P is the gas pressure
V is the volume
is the adiabatic index, which is for an ideal monoatomic gas
The previous law can also be rewritten as
or
where we know that
because the volume has increased by a factor 4.0. Substituting into the equation, we find by which factor the pressure has changed: