Answer:
The force required to pull a wagon if 84 J of work are exerted to pull a wagon 7m is 12 Joules.
HOW TO CALCULATE WORK DONE:
Work done can be calculated by multiplying the force applied on an object by the distance traveled. That is;
Work done = Force × distance
Force = Work done ÷ distance
According to this question, the work done is 84J and the wagon was pulled to a distance of 7 metres. The force is calculated as follows:
Force = 84J ÷ 7m
Force = 12N.
Therefore, the force required to pull a wagon if 84 J of work are exerted to pull a wagon 7m is 12 Joules.
Answer:
a) When the train is approaching the frequency is 477.19 Hz and the wavelenght is 0.719 m
b) When the train is leaving the crossing the frequency is 367.152 Hz and the wavelenght is 0.934 m
Explanation:
Given data:
v = speed of the train = 44.7 m/s
V = speed of the sound = 343 m/s
f = frequency of sound = 415 Hz
a) If the train is approaching, the frequency is:
The wavelength is:
b) If the train leaves the crossing, the frequency is:
The wavelength is:
A Electric Discharge is the release and transmission of electricity.
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Answer:
∝= 51.08 nm
Explanation:
It is necessary that the photon have the enough energy to get out of the ground state and the energy required to jump out of the ground state = 13.6 eV
so we have the total energy needed:
E= 13.6+10.7
E= 24.3 eV
Planck constant = 6.62*10^-34
with the E formula we could clear the wavelength variable like this....
E= hf
E= h(c/∝)
∝= h*(c/E)
∝=(6.62*10^-34) * [ 3*10^8 / 24.3*(1.6*10^-19)J ]
∝= 5.108*10^-8m
now we just need to convert to a nm distance
∝= 51.08 nm
C. The daughters received a random set of genes from both of their parents