Answer:
Explanation:
For acceleration due to gravity g , the expression is
g = GM / R² , where G is gravitational constant M is mass of the earth and R is radius of the earth .
At height h , let the value of it becomes g / 4 , so
g / 4 = GM / ( R + h )²
dividing
4 = [( R+ h)² / R² ]
2 = (R + h) / R
2 = 1 + h / R
h / R = 1
h = R
So at height equal to radius of the earth , acceleration due to gravity becomes 1 /4 of value on the surface of the earth .
Answer:
40.34 s
Explanation:
Given,
Velocity (v) = 5.33 m/s
Distance (s) = 215 m
Time (t) = ?
We know that,
Speed (v) = distance (s)/time (t)
⇒ time(t) = distance (s)/speed (v)
= 215/5.33 = 40.34 sec
∴ time(t) = 40.34 sec.
That symbol represents a source of DC, usually a battery.
The zig-zag line represents a resistor, and the two little circles
connected by a short line represent a switch in the closed position.,
The answer is A : 302 I really hope this helps!