The relationship between the two is that air temperature changes the air pressure. For example, as the air warms up the molecules in the air become more active and they use up more individual space even though there is the same<span> number of molecules. This causes an </span>increase<span> in the air pressure.</span>
Answer: A
Hope this help you!!
<span><u>Answers</u>
Advantages.
1. Dynamos have no running cost. That means one bought they do not any running cost.
2. The power from the dynamo do not run out. As long as the bicycle is moving there will be enough lighting.
3. It environmental friendly. Dynamo do not use toxic chemicals to dispose.
Disadvantages
1. There can only be light if the bicycle is moving. Before the rider starts moving there is not light at all.
2. Whenever the speed reduces the light becomes dimmer. This means the rider has to maintain a certain speed for there to be enough light.
3. It require energy from the rider for there to be light. He has to keep on pending to maintain the motion of the bicycle.
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Answer:
the coin does not slide off
Explanation:
mass (m) = 5 g = 0.005 kg
distance (r) = 15 cm = 0.15 m
static coefficient of friction (μs) = 0.8
kinetic coefficient of friction (μk) = 0.5
speed (f) = 60 rpm
acceleration due to gravity (g) = 9.8 m/s^{2}
lets first find the angular speed of the table
ω = 2πf
ω = 2 x π x 60 x 
ω = 6.3 s^{-1]
Now lets find the maximum static force between the coin and the table so we can get the maximum velocity the coin can handle without sliding
static force (Fs) = ma
static force (Fs) = μs x Fn = μs x m x g
Fs = 0.8 x 0.005 x 9.8 = 0.0392 N
Fs = ma
0.0392 = 0.005 x a
a = 7.84 m/s^{2}
= a x r
= 7.84 x 0.15
Vmax = 1.08 m/s
ωmax = 
ωmax =
= 7.2 s^{-1}
now that we have the maximum angular acceleration of the table, we can calculate its maximum speed in rpm
Fmax = 
Fmax =
= 68.7 rpm
since the table is rotating at a speed less than the maximum speed that the static friction can hold coin on the table with, the coin would not slide off.
Weight= mass x g = 1000x9.8 = 9800N. Hope this helps!