Answer:same
Explanation:
Frequency will remain same irrespective of refractive index of material because frequency is the ratio of velocity and wavelength .
When a wave travel from one material to another then its wavelength and velocity changes in that medium and they adjust itself to give same frequency
Answer:
A.
Explanation:
The SUV accelerates uniformly. In this case, speed () is directly proportional to time (). That is:
(1)
Where is the proportionality constant.
Then, we eliminate this constant by creating the following relationship:
(2)
If we know that , and , then the time interval for the SUV to accelerate from rest to a speed is:
Hence, correct answer is A.
B Since when each object is negatively charged it becomes a electronic. Basically