Answer:
Pottasium iodide (KI)
Explanation:
product of this reaction is KI. this product is an ionic compound.
A reaction that requires FREE energy it must be non spontaneous so option b is correct.
Answer:
The option is B is not true for Hubble telescope.
#1
Wavelength = 13 km
it vibrates 10 times each minute
so the frequency is defined by the number of vibrations per second
now the speed of wave is defined as
<em>so here velocity of wave is 2.2 km/s</em>
#2
Intensity of wave is directly proportional to the square of its amplitude
so we can say
k = constant
so if amplitude is doubled then its intensity will be increased by its square
<em>so intensity is 4 times</em>