Answer:

Explanation:
<u>Given Data:</u>
Cycles = c = 3 cycles
Time = t = 2 seconds
<u>Required:</u>
Time period = T = ?
<u>Formula:</u>
1) f = c/t
2) T = 1/f
<u>Solution:</u>
<u>Finding frequency first:</u>
f = c / t
f = 3/2
f = 1.5 Hz
<u>Now, finding period:</u>
T = 1/f
T = 1 / 1.5
T = 0.67 seconds
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Answer:
Magnetic field lines never intersect each other.
They originates(from north pole) and terminates (to south pole) perpendicularly from/to the surface of magnet. Also magnetic field lines continues through the magnet.
Magnetic field is denser at the pole and becomes less dense as we move away from the poles.
Explanation:
The natural process is called greenhouse effect. This is when the Sun's light enters the Earth, and converts to heat. Light passes through the Earth's atmosphere much easier compared to heat. Because of this, heat is trapped on Earth because it cannot exit the atmosphere as easily as light does.
I think it's D cuz D is the heliocentric theory
Answer:
Max kinetic energy for 340 nm wavelength will be 
Explanation:
In first case wavelength of electromagnetic radiation 
Plank's constant 
Maximum kinetic energy = 0.54 eV
Energy is given by 
We know that energy is given
, here
is work function
So 

Now wavelength of second radiation = 340 nm
So energy 
So 