They are poor conductors because they keep the heat trapped in one spot, while other materials like metal let the heat go through itself.
Answer:
1/3 times.
Explanation:
Let V₀ be the peak voltage .
IR ( rms ) = ( V₀ / √2 R )
R is value of resistance
IC = ( V₀ ωC / √2 )
( 1 / ωC is reactance of capacitance in ac circuit )

= 
When frequency is tripled angular frequency will also be tripled
hence the ratio
becomes 1/3 times.
Answer:
3.1 m/s
Explanation:
The acceleration of the ball is given by:

where
v is the final velocity
u is the initial velocity
t is the time elapsed
Here we know:
a = 1.8 m/s^2 is the acceleration
v = 7.6 m/s is the final velocity
t = 2.5 is the time elapsed
Solving for u, we find the initial velocity of the ball:

The mechanical advantage becomes smaller, decreasing the amount of work that needs to be done. It will take less effort to lift the object or load. It only changes if the slope does.