Answer:
Explanation:
Energy of electron in n = 4 state
= - 13.6/4² =- 0.85 eV
So energy needed to extract it from atom = .85 eV.
Answer:
Oh I had this question before! :)
Explanation:
Acid - citrus products - the classic one is lemon juice
Anything with a sour taste is acidic
Base - soap, oven cleaner, drain cleaner, baking soda
Basic things are bitter (please don't taste the drain cleaner and oven cleaner)
Acceleration, a = (v - u)/t
where v is the final velocity, u is the initial velocity, and t is the time.
This formula on a velocity time graph represents the slope of the graph.
Answer:
<h3>The answer is option B</h3>
Explanation:
The wavelength of a wave can be found by using the formula

where
c is the speed of the wave
f is the frequency
From the question
c = 343 m/s
f = 466 Hz
We have

We have the final answer as
<h3>0.74 m</h3>
Hope this helps you