Answer:
D)Not enough information
Explanation:
According to Pascal's principle, the pressure exerted on the two pistons is equal:

Pressure is given by the ratio between force F and area A, so we can write

The force exerted on each piston is just equal to the weight of the corresponding mass:  , where m is the mass and g is the gravitational acceleration. So the equation becomes
, where m is the mass and g is the gravitational acceleration. So the equation becomes

Now we can rewrite the mass as the product of volume, V, times density, d:

We also know that 
So we can further re-arrange the equation (and simplify g as well):


We are also told that block B has bigger volume than block A:  . However, this information is not enough to allow us to say if the fraction on the right is greater than 1 or smaller than 1: therefore, we cannot conclude anything about the densities of the two objects.
. However, this information is not enough to allow us to say if the fraction on the right is greater than 1 or smaller than 1: therefore, we cannot conclude anything about the densities of the two objects.
 
        
             
        
        
        
Answer:
true
Explanation:
the wavelength of AM radio is 10 m whereas FM has 1 m
 
        
             
        
        
        
Answer:

Explanation:
The heaviside function is defined as:

so we see that the Heaviside function "switches on" when , and remains switched on when
, and remains switched on when 
If we want our heaviside function to switch on when  , we need the argument to the heaviside function to be 0 when
, we need the argument to the heaviside function to be 0 when 
Thus we define a function f:

The  term inside the heaviside function makes sure to displace the function 5 units to the right.
 term inside the heaviside function makes sure to displace the function 5 units to the right. 
Now we just need to add a scale up factor of 240 V, because thats the voltage applied after the heaviside function switches on. ( when
 when  , so it becomes just a 1, which we can safely ignore.)
, so it becomes just a 1, which we can safely ignore.)
Therefore our final result is:

I have made a sketch for you, and added it as attachment.  
 
        
             
        
        
        
You draw a straight line from the start point to the end point. It doesn't matter what route was actually followed for the trip.