False, Because there is some cases where enlarged image needed.
Astronauts float<span> around in </span>space<span> because there is no gravity in </span>space. Everyone knows that the farther you get from Earth, the less the gravitational force is. Well,astronauts<span> are so far from the Earth that gravity is so small. This is why NASA calls it microgravity</span>
Since any first distanced1=λ(2N1−1)/4, whereN1= 1,2,3,· · ·will do, the first distance only cannot be used to know the wavelength.The space between the resonances is ½ a wavelength, soλ= 2 [d2−d1]= 2 [(35 cm)−(25 cm)]= 20 cm.
The frequency isF = vλ=343 m/s2 [(35 cm)−(25 cm)]= 1715 Hz.
Answer: 480 kJ
Explanation: Energy = power · time
E = Pt = 4000 W · 120 s = 480 000 J