Answer: False
Explanation:
The statement that the environment affects people, but people don't affect the environment is incorrect. It should be noted that people also affect the environment.
Some of our impact on the environment include pollution, deforestation, overpopulation, burning of fossil fuels etc. Thus has resulted in changes such as erosion, climate change, etc.
We need the frequency of the photon, it is v = c/ λ
Where c is 3 x 10^8 ms^-1 and λ
is the wave length
We also need the expression of
connecting frequency to energy of photon
which is E = hv where h is Planck’s
constant
Combining the two equations
will give us:
E = h x c/λ
Inserting the values, we will
have:
E = 6.626 x 10^-34 x 3 x 10^8 /
0.126
E = 1.578 x 10^ -24 J
Explanation:
The given data is as follows.
Mass of the ornament (
) = 0.9 kg
Length of the wire (l) = 1.5 m
Mass of missile (
) = 0.4 kg
Initial speed of missile (
) = 12 m/s
r = 1.5 m
According to the law of conservation of momentum,

Putting the given values into the above formula as follows.


0 + 4.8 = 1.3v
v = 3.69 m/s
Now, the centrifugal force produced is calculated as follows.

= 
= 11.80 N
Hence, tension in the wire is calculated as follows.
T = 
= 
= 24.54 N
Thus, we can conclude that tension in the wire immediately after the collision is 24.54 N.
Answer:
A. the wave speed v and Wavelength
Explanation:
Given that
Mass density per unit length=μ
Frequency = f
The velocity V given as


T=Tension
V=Velocity
V= f λ
λ=Wavelength
Therefore to find the tension ,only wavelength and speed is required.
The answer is A.