Sample:
As soon as the lightning is seen, sound travels in the air for several kilometers until it eventually reaches the observer.
The correct option is C.
J.J Thompson demonstrated that Dalton's model of the atomic theory was wrong by showing that atoms are made up of sub particles, this is contrary to the report that Dalton gave about atoms. In his experiment, Dalton reported that atoms are indivisible, that is, they can not be broken down into smaller particles. J.J Thompson on the other was able to show through his cathode ray experiment that atoms are made up of smaller particles called electrons.
<span>Answer:
sin(incidence)/sin(refraction) = n_refraction/n_incidence
sin(50) / sin(x) = 1.5 / 1
sin(50)/1.5 = sin(x)
sin(x) = 0.511
x = 30.71o
B]
50 degrees, same as the angle going in.
You can show that by reversing the steps in A.
sin(30.7)/sin(x) = 1/1.5
C]
The glass is 5 cm thick.
The reference angle = 30.7o
Tan(30.7) = displacement / thickness
Tan(30.7) = x / 5
5*sin(30.7) = x
x = 2.97 cm which is the displacement.</span>
Answer: The statement that supports Newton's first law of motion is the one that says that planets can move at a varying speed due to forces exerted in space
Answer:
size of insect = wavelength = 16.1 mm
Explanation:
Since the bat can detect the size of small insects which are of size equal to the wavelength of sound in air
So here we can say that the wavelength of sound is the ratio of speed of sound and its frequency
here we know that
speed of sound in air is 536 m/s
frequency of sound is 33.3 kHz
so here we can say
