Answer:
when the Sun illuminates half of the Moon it must be at 90°
Explanation:
The Moon has a circular motion around the Earth and the relative position of the sun, the earth and the moon create the lunar phases.
For this case when the Sun illuminates half of the Moon it must be at 90°, this angle changes with the movement of the moon, it is zero degree for the new moon and 180° for the full moon
Answer:
A positive lifted index means that a parcel of air, if lifted, would be COLDER than the surrounding air at 500mb. The air is, therefore, stable and would resist vertical motion. Large positive values (+8) would normally indicate very stable air.
Answer:
30.93 m/s
Explanation:
Given that, the speed of stolen car is,

As policeman start chasing the stolen car after 60 seconds.
Now suppose the speed of policeman car is, 
The policeman catches the stolen car at a distance of,

Now the distance covered by the policeman in time t is 
And the distane cover by the thief in stolen car in time(t+60s) is
.
And these distances are equal and they are equal to 60000 m.
Therefore,

Therfore,

Now use this value to solve for minimum speed of policeman's car.

Therefore minimum speed of policeman's car is 30.93 m/s.
Answer:
Time, t = 141 seconds
Explanation:
Given that,
Distance between the class and the person, d = 282 m
Speed of the person, v = 2 m/s
We need to find the time taken by the person to get to your class. Let the time taken is t. The speed of the person is given by :



t = 141 seconds
So, the time taken by the person to get to your class is 141 seconds. Hence, this is the required solution.