Answer:
Some lenses are used to focus light to a pre-defined point based on the amount of curvature of their surfaces.
In a piano design convex, some surfaces are flat while others has positive lenses (biconvex)
Explanation:
Solution
These lenses are applied to pay attention to light in a point pre-defined based on the amount of curvature of their surfaces.
For that of a plano-convex design, one surface has a positive curve and for biconvex lenses, both surfaces are positively curved while the other remains flat.
when used practically, plano-convex lenses are most commonly used where the object being imaged is far apart from lens.
In this passage, the word “sweltering” has the emotional connotations of misery and discomfort.
In this passage, the word “<span>oasis</span>” has the emotional connotations of serenity and safety.
By using these two words with opposite emotional connotations, King emphasizes the contrast between the <span>awfulness of inequality </span>and the<span> wonders of equality.</span>
Answer:
Explanation:
temperature (T) = 25 degrees
volume of water (v) = 2 L = 2000 mL
density of water = 0.997 g/mL
density of ice = 0.917 g/mL
we can get the mass of the water and the use it to get the volume when it freezes to ice, this is because the mass remains the same irrespective of the change of state.
- mass of water = volume x density = 2000 x 0.997 = 1994 g
- volume of ice = mass/density = 1994 / 0.917 = 2174.5 mL = 2.175 L
Answer:
28.3 kg
Explanation:
Assuming the ground is level, the normal force equals the weight.
N = mg
277 N = m × 9.8 m/s²
m = 28.3 kg
Use the kinematic equation: d = vi • t + ½ • a • t^<span>2
</span><span>20=0(t)+(0.5)(9.8)(t^2)
</span>20=4.9(t^2)
t=2.02seconds
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Final Velocity=Initial Velocity +at^2
Vf=(9.8)(2.02^2)
Vf=19.796
