Answer: Radio waves and light waves are both electromagnetic raidiations.
Explanation:
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The dimension of frequency is reciprocal time.
The unit is the Hertz.
1 Hertz = 1 per second.
Explanation:
Two atoms with equal masses, m, and equal speed, v, engage in a head on elastic collision. Since, the two atoms both having equal masses and equal but opposite velocity, the total linear momentum of the system is zero. Therefore, conservation of linear momentum to be conserved , the velocities before and after collision are same. Similarly, in elastic collision total kinetic energy is also conserved. The kinetic energy before and after collision are same.
Answer:
h= 43.07 m
Explanation:
<u>Given:</u>
Vi = 15 m/s, Vf= 0m/s, t = 2s, a=g=9.8 m/s²
<u>To Find:</u>
height of the clip h= ?m
<u>Solution:</u>
Since it is thrown horizontally an angle of 0°, so Viy = Viy sin 0° = 0 m/s
and Vix = Vix cos 0° = 15 m/s
<u>For Horizontal </u>
h = 0 m, ax = 0m/s and Vix = 15 m/s
so h = h₀ + Vix t + 1/2 a t²
⇒ h₀ = 30 m (Horizontal distance)
<u>For vertical</u>
Viy = 0m/s, h= ? m, a =g=9.8 m/s²
h = h₀ + Viy t + 1/2 a t²
h = 30m + 0 + 1/2 (9.8 m/s² × 2²)
h = 30 + 16.07
h= 43.07 m
Answer: Infrasound
Explanation: Sounds with frequencies below 20 hertz are called infrasound. Infrasound is too low-pitched for humans to hear. Sounds with frequencies above 20,000 hertz are called ultrasound