Using the formula
V1P1=V2P2
where V1=1.0
V2=4.0
P1=1.2
P2=?
P2=V1P1/V2
P2=1.0*1.2/4.0
P2=0.3 atm
Refraction is the change in direction of a wave, caused by the change in the wave's speed. Examples of waves include sound waves and light waves. Refraction is seen most often when a wave passes from one transparent medium to another transparent medium. Different types of medium include air and water. When a wave passes from one transparent medium to another transparent medium, the wave will change its speed and its direction. For example, when a light wave travels through air and then passes into water, the wave will slow and change direction.
Answer:
An antimony can form 3 bonds
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Explanation:
Let's think about the system that includes the spacecraft, the astronaut,
and all the equipment tied to him. In this system, nothing is moving relative
to anything else, so the total linear momentum is zero.
Now, suddenly, a blast of gas leaves the astronaut's little SCUBA tank, and
hisses away from him and the spacecraft, in that direction ===> .
The momentum of the cloud of nitrogen is
(mass) x (speed)
= (0.03 kg) x (900 m/s)
= 27 kg-m/s in that direction ===> .
Now is the perfect time to recall that momentum is conserved.
It can't be suddenly created or destroyed, it can't appear out of
nowhere, it can't disappear into nowhere, and the total amount
of momentum in a system is constant.
In order to keep the total momentum of this system constant, the
astronaut himself gets 27 kg-m/s of momentum in this direction <=== .
The mass of him and his equipment is 320 kg.
So ...
27 kg-m/s <== = (320 kg) x (speed <==)
Speed = 27 kg-m/s / 320 kg
= 0.084375 m/s in this direction <===