Answer:
it’s the third option: 4,600,000 km
Explanation:
just took the test and that was correct
Answer:
The wavelength is 0.14 m
Explanation:
Given that,
Frequency = 2450 Hz
Speed of sound = 343 m/s
We need to calculate the wavelength
Using formula of wavelength

Where, v = speed of sound
f = frequency
Put the value into the formula



Hence, The wavelength is 0.14 m
Penetrating electromagnetic radiation of a kind arising from the radioactive decay of atomic nuclei Answer:
Explanation:
Answer:
Explanation:
Given
Airplane is flying with horizontally with a constant momentum during time interval 
Impulse is given by change in momentum, so there is no net impulse on the Plane because momentum is constant
(b) As there is no change in momentum therefore impulse of thrust and air drag is balanced i.e. both are equal in magnitude but act in opposite direction