What unit is used to express work?
1 answer:
You might be interested in
Answer:
E = 1.24MeV
Explanation:
The photon travels at the speed of light, 3.0 × m/s, and given that its frequency = 1 picometer = 1.0 ×
m.
Its energy can be determined by;
E = hf
= (hc) ÷ λ
where E is the energy, h is the Planck's constant, 6.626 × Js, c is the speed of the light and f is its frequency.
Therefore,
E = (6.626 × × 3.0 ×
) ÷ 1.0 ×
= 1.9878 × ÷ 1.0 ×
E = 1.9878 × J
But, 1 eV = 1.6 × J. So that;
E =
= 1242375 eV
∴ E = 1.24MeV
The energy of the photon is 1.24MeV.
Answer:
F.
Explanation:
Here in the question the mass of the pulley is zero, hence, the tension in the cable throughout is same.
magnitude of tension in rope 1 is
T1= F
Hence the tension T1 is rope 1 is F.
