Answer:
Where can I get a can opener? hahaha
Answer:
Explanation:
We shall apply Doppler's effect here .
original frequency = 79.79 kHz
apparent frequency due to movement of source ( bat ) = 81.63 Hz
Let the velocity of bat be v .
expression for apparent frequency can be given as follows
n =
n is apparent frequency , n₀ is original frequency , V is velocity of light and v is velocity of source of sound
Putting the values
81.63 =
340-v = 332.33
v = 7.67 m /s
velocity of bat is 7.67 m /s .
Answer:
the correct one is 2
Explanation:
The emission and arcion spectra are similar, in the emission spectra a heated material emits photons for the internal transitions of the electrons, in the absorption spectrum the continuous emission of a lamp is absorbed at the energies that the material has transitions.
In our case the material is low early, so all the electrons are in their base states.
As the light beam has all wavelengths, those corresponding to the first emission of the material will be observed.
When reviewing the answers, the correct one is 2
Explanation:
The magnitude of the net force can be found with Pythagorean theorem.
F² = Fx² + Fy²
F² = (1.06 N)² + (9.37 N)²
F = 9.43 N
The direction can be found with trigonometry (measured from the -y axis):
θ = atan(Fx / Fy)
θ = atan(1.06 / 9.37)
θ = 6.45°