Answer:

Explanation:
Given data
Speed v=2650 km/h
Radius r=85.0 km
To find
Centripetal Acceleration
Solution
As centripetal acceleration is given as

where
v is velocity
r is the radius
Substitute the given values in eq(i)

Answer:
Density = mass/volume
Volume of cube = mass/density
630g/8.94 = 70.5cm^3 (3s.f.)
Since it is a cube, its dimensions of Length x breadth x height=volume
Take 70.5 amd cube root it
![\sqrt[3]{70.4697986577)](https://tex.z-dn.net/?f=%20%5Csqrt%5B3%5D%7B70.4697986577%29)
=4.13 (3s.f)
hence , it would be 4.13 x 4.13 x 4.13 to find the volume
Hence, the answer would be 4.13cm(3s.f.)
Answer: C
Frequency
Explanation:
In an analog to digital converter, the analog voltage is sampled at a regular interval of time which is known as sampling frequency. Therefore, the property of an electromagnetic wave that changes when the wave is encoded with analog information is frequency.