Answer:
140 J
Explanation:
From the the question, the mass of the man =70.0 kg and the speed at which the man is walking =2.0 m/s.
where K.E = the kinetic energy, m=mass and v= speed.
By substitution,
Hence the kinetic energy of the man is 140J
On April 15, 1999, a South Korean cargo plane crashed due to a confusion over units. The plane was to fly from Shanghai, China,
1 answer:
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Answer:
(a). The maximum electric field strength is 0.0133 V/m.
(b). The maximum magnetic field strength in the electromagnetic wave is
(c). The wavelength of the electromagnetic wave is
Explanation:
Given that,
Maximum potential = 4.00 mV
Distance = 0.300\ m
Frequency = 1.00 Hz
(a). We need to calculate the maximum electric field strength
Using formula of the potential difference
(b). We need to calculate the maximum magnetic field strength in the electromagnetic wave
Using formula of the maximum magnetic field strength in the electromagnetic wave
Put the value into the formula
(c). We need to calculate the wavelength of the electromagnetic wave
Using formula of wavelength
Put the value into the formula
Hence, (a). The maximum electric field strength is 0.0133 V/m.
(b). The maximum magnetic field strength in the electromagnetic wave is
(c). The wavelength of the electromagnetic wave is
Answer:
1.
2.
Explanation:
Radial acceleration is:
(1)
With r the radius respects the axis of rotation and v the tangential velocity that is related with angular velocity (ω) by:
(2)
By (2) on (1):
To find the acceleration of the tube with the fall, we can use the expression:
(3)
Due impulse-momentum theorem:
(4)
with p the momentum and J the impulse. By (4) on (3):
And using Newton's second law (F=ma) and that (P=mv):
(5)
Final velocity is the velocity just after the encounter with hard floor, and initial momentum us just before that moment so the first one is zero and the second one can be found sing conservation of energy:
So (5) is:
solving for a:
It’s negative because is opposed to the tube movement.