Answer:
Frequency is the correct answer.
Explanation:
When a wave go from one medium to another medium then the velocity, wavelength and Amplitude changes. But there is no change on the frequency.
Here, The string and the surroundings air are two medium , from which the wave travels.
So, the wave has same frequency in both medium.
The correct answer is Frequency.
Answer:
32.6mm
Explanation:
Using area of a sphere(bulb) = 4πr²
So A is proportional to radius²
So the Energy will be proportional to r²
But 120/80 = 1.5 is the energy factor so
Using
1.5/d² = 1/r²
1.5/40²= 1/r^2
r = √( 40²/ 1.5)
r = 32.6m
Answer:venus
Explanation:
is most like Earth in terms of mass and size, and it is also the planet closest to Earth, but the two planets are far from identical twins.
Answer: The area of brick in contact with the floor is 1539 
.
Explanation:
Given: Length = 19 cm
Width = 9 cm
Height = 9 cm
As the brick is rectangular in shape. Hence, its area will be calculated as follows.
Substitute the values into above formula as follows.
Thus, we can conclude that area of brick in contact with the floor is 1539 .
