Answer:
A. As the ropes are horizontal the child has travelled 2m of vertical displacement from his lowest position.
Gpe @ A=mgh=40*9.81*2=784.8J
B. At 30degree vertical angle the vertical displacement from lowest position is given by
2-2cos(30)=2-1.73=0.27m
Gpe @B= 40*9.81*0.27=106 J
C: at the bottom of circular arc it's Gpe is zero relative to lowest position as bottom of arc itself is lowest position.
<span>1.the higher the temperature of something, the greater its thermal energy.
2. the change in state from gas to liquid is called evaporation.
3. energy that comes from bonds within matter is called chemical energy.
4. the change in state from liquid to gas is called vaporization.
5. gas bubbles forming throughout the liquid is called boiling.
6. liquid changing to gas only at the surface is called evaporation.
7. the change in state from solid to liquid is called melting.
8. the change in state from liquid to solid is called freezing.
9. the law of conservation states that during any change, the amount of energy stays the same
10. another term for a chemical change is a chemical reaction
11. in sublimation, particles pass directly from solid to gas</span>
There ya go, Champ. Now you have all the answers and you haven't
learned a thing.
<span>The amplitude because that controls the height of the wave. Correct answer: Amplitude.</span>
Answer and Explanation:
Limitation of Doppler shift :
The Doppler impact is relevant when the speeds of the wellspring of sound and spectator are considerably less than the speed of sound. The movement of both the spectator and the source is along a similar straight line.When movement is not in straight line or velocity is not much less than speed of light then we can not use Doppler shift
This is the limitation of Doppler shift to determine the object distance
Alkaline earth metals are found in group 2