Answer:
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Explanation:
d= 80km = 8000m
t = 45 min = 45/60 h
= 0.75 h
V= ?
we know that,
V = d /t
or,V= 80 km / 0.75 h
- or, V= 106.67 km/hr
or,V= 106.67×1000m / 3600 s
2. or, V= 29.63 m/s
Electromagnetic radiation consists of discrete packets of kinetic energy called Photons, which are characterized by a certain wavelength and energy level.
<h3>What are
photons? </h3>
The representation by a particle of a quantum of light or any other electromagnetic radiation is called photons. The energy is proportional to the frequency of radiation however it has zero mass. It travels at a constant speed. It is a carrier of energy. When the sun changes the particles into both light and heat, it is a photon. They don’t carry any electrical charge. They are like electric fields traveling through space as shown by Maxwell in his theory. They can be easily created and destroyed. They are also called light quantum.
To learn more about photons, visit:
brainly.com/question/20912241
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Answer:
F = 0.179 N
Explanation:
given,
length of the rod = 0.759 m
mass of the rod = 1.03 kg
force = ?
initial angular speed = 0 rad/s
final angular speed = 6.87 rad/s
time interval = 9.95 s
the angular acceleration
moment inertial of the rod
torque produced by the rod τ = I α
torque is also equal to τ = F L
now,
F L = I α
F = 0.179 N
