Answer : Infrared rays have a shorter wavelength than radio waves.
Explanation :
The wavelength of Infrared rays is 700 nm – 1 mm
The wavelength of X- rays is 0.01 nm – 10 nm
The wavelength of UV rays is 10 nm – 400 nm
The wavelength of radio waves is 1 meter – 100,000 km
The wavelength of gamma rays is less than 0.01 nm
So, from the above data it is clear that the wavelength of the infrared rays have a wavelength shorter than the radio waves.
Hence, the correct option is (C) " radio waves ".
R- 3.2 ohms i -4.5 amps v-? V-IR 4.5*3.2
Answer: 14.4 volts
Answer:
60,000 J
Explanation:
The total Energy in the system = the sum of potential and kinetic energy
Total energy = K. E + P. E
K. E = 0.5mv²
m = mass ; v = velocity, K. E = kinetic energy
V = 20 m/s ; mass = 600kg
Total energy = 180000 J
Hence,
K. E = 0.5 * 600 * 20^2
K.E = 300 * 400
K. E = 120,000
P. E = TOTAL ENERGY - K.E
P.E = I80,000 - 120,000
P.E = 60,000 J
Answer:
t = 14 s
Explanation:
First, we need to find the acceleration of the meteor by using Newton's s Second Law, as follows:
where,
F = Unbalanced Force = 100000 N
m = mass of meteor = 70 kg
a = acceleration of meteor = ?
Therefore,
a = -1428.57 m/s² (negative sign de to deceleration)
Now, we use general formula of acceleration to find time:
where,
t = time taken = ?
Δv = change in speed = 0m/s - 20000 m/s = - 20000 m/s
Therefore,
<u>t = 14 s</u>
Answer:
An AC circuit
Explanation:
In Alternate current, current reverses many times periodically.