Answer:
B. 1.55 × 10³ m/s
Explanation:
f = 3.02 x 10^6 Hz
wavelength = 5.13 x 10^-4 m
v = ?
v = f*lamda
v = 3.02 x 10^6 × 5.13 x 10^-4
v = 1.55 × 10³ m/s
Answer: Whenever the temperature is high, the air pressure is low.
Explanation:As the temperature rises, the air gets heated, expands, and becomes lighter. … As a result, the air pressure in such areas decreases.
Answer:
0.544 eV
Explanation:
To ionize the hydrogen atom 
So the required energy is 
as
So 
We have to calculate the energy required to ionize hydrogen atom when it is in n=5
So the energy should be less than 
According to the American Heart Association, the broad,
approximate guideline for your MAXIMUM heart rate is:
-- take 220
-- subtract your age
The unit is "beats per minute".
But there are many things that have an effect on this number.
A few of them are:
-- your age
-- your weight
-- any medicines you're taking
-- HOW you measure your heart rate.
If you're planning any REGULAR activity that will play with
your heart rate, you really ought to discuss it with your doctor
before you jump in.
