Our Sun will probably become a red giant before collapsing into a dwarf star.
An alternating current changes position 50 to 60 times per second due to the changing charges at the ends of the wires. As the charges change from (+) to (-) and vice versa, the electrons in the wire change direction according to its attraction and repulsion from the charges. Whether a country uses 50 or 60 depends on its electrical system.
Answer:
81,000 has 5 significant figures
3.14 has 3 significant figures
5.670 has 3 significant figures
502 has 3 significant figures
207.300 has 4 significant figures
Answer:
.25=1.34 seconds
.50=1.89 seconds
Explanation: I got it wrong and those were the correct answers it showed
We use kinematic equation of motion,
Here, s is distance traveled, u is the initial velocity, t is time taken and g is acceleration due to gravity.
Given, 
.
We take, 
because stone has no initial velocity.
Therefore,
Thus, the height of cliff is approximately 61.75 m.
