Answer:
The current halves
Explanation:
The relationship between voltage, current and resistance in a circuit is given by Ohm's law:

where
V is the voltage
R is the resistance
I is the current
We can rewrite the formula as

we see that I is directly proportional to V and inversely proportional to R. In this problem, V is held constant while R is doubled:

so, the new current in the circuit will be

So, the current halves.
Answer: The ice cube would float on top of the water and the rock would sink to the bottom.
Explanation: The ice cube has a smaller density than the rock which allows the ice cube to float but makes the rock sink to the bottom of the glass of water.
Meaning of life ....
condition that distinguishes animals and plants from inorganic matter, including the capacity for growth, reproduction, functional activity, and continual change preceding death.
Answer:
b) Demultiplexer.
Explanation:
The multiplexed signal occupies the total bandwidth of the communications channel, while that the constituent component signals, occupy only a small part of the bandwidth.
Prior to be demodulated, they must be separated each other, which is done (in a FDM multiplexing scheme) using a series of band-pass filters.
Answer:
The minimum thickness is 
Explanation:
generally the equation for thin film interference is mathematically represented as

Where t the thickness
m is any integer
n is the refractive index of the film
is the wavelength of light
Since we are looking for the thickness we make t the subject of the formula

m= 0 cause the thickness is minimum at m=0
Substituting values

