Answer:
The answer is C "think about the problem first, systematically consider all factors, and form a hypothesis"
Explanation:
In physics there is some basic fomula that sir Isacc Newton proposed under the topic of motion. The three formulas are below;
<em>1) v=u+at</em>
<em>2)v^2=u^2+2as</em>
<em>3)s=ut+(1/2)(at^2)</em>
the variables are explained below;
u= initial velocity of the body
a=acceleration/Speed of the body
t= time taken by the body while travelling
s= displacement of the body.
Therefore to solve keatons problem, the factors(variables) in the formulas above need to be systematically considered. Since the ball was dropped from the top of the building, the initial velocity is 0 because the body was at rest. Also the acceleration will be acceleration due to gravity (9.8m/s^2)
Answer:
1. In general, the best shields will be able to block a spectrum of radiation. Aboard the space station, the use of hydrogen-rich shielding such as polyethylene in the most frequently occupied locations, such as the sleeping quarters and the galley, has reduced the crew's exposure to space radiation.
2. It absorbs harmful ultraviolet radiation from the sun, helps keep Earth's surface warm via the greenhouse effect, and reduces temperature extremes between day and night. ... So, thanks to gravity, although some of Earth's atmosphere is escaping to space, most is staying here.
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Answer:
The reason why the height for the liquid is 5.18 m is because, for constant pressure, height is inversely proportional to density.
Explanation:
We know that pressure, P = ρgh where ρ = density of material, g = 9.8 m/s and h = height.
Since density of liquid = 2 × density of water = 2 × 1000 kg/m = 2000 kg/m³
Since atmospheric pressure = 101500 N/m²,
The height of liquid for this pressure is h = P/ρg = 101500/(2000 × 9.8) = 5.18 m
For the same pressure, the height for water is h = P/ρg = 101500/(1000 × 9.8) = 10.36 m
Since pressure = constant,
P = ρgh ⇒ P/ρg = h since P and g are constant, h ∝ 1/ρ
ρ₁h₁ = ρ₂h₂
So, the reason why the height for the liquid is 5.18 m is because, for constant pressure, height is inversely proportional to density.
I attached my work and highlighted my answers. Hope it makes sense! please comment back with any questions if anything is still unclear! :)
Answer:
And the force of ( Attraction or repulsion) between the poles A and D ( maximum or minimum)
