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cestrela7 [59]
3 years ago
10

You have two lens A and B of focal length +50cm and -50cm respectively. The nature and power of the lenses respectively isa. Con

cave, -2 D ; Convex, +2 D b. Convex, +2 D; Concave, - 2 D
Physics
1 answer:
Gre4nikov [31]3 years ago
8 0

Answer:

Concave, +2D

Convex -2D

Explanation:

Power of a lens is the reciprocal of its focal length.

For lens of +50cm = 0.5m

Power of the lens = 1/0.5

Power of the lens = +2Dioptres

Since the focal length is positive, the lens is concave

For the lens of -50cm = -0.5m

Power = 1/-0.5

Power = -2D dioptres

Since the focal length is negative, the lens is convex

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A comet is in an elliptical orbit around the Sun. Its closest approach to the Sun is a distance of 4.8 1010 m (inside the orbit
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Answer:

Explanation:

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where;

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To find the speed V_f:

Using the formula:

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3 0
2 years ago
A cyclist accelerates from a velocity of 10 miles/hour east until reaching a velocity of 20 miles/hour east in 5 seconds. What w
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Answer:

a = 0.894\ m/s^2

Explanation:

<u>Motion with Constant Acceleration</u>

A body moves with constant acceleration when the speed changes uniformly in time. The equation used to find the final speed vf is

v_f=v_o+at

Where vo is the initial speed, a is the acceleration, and t is the time.

The cyclist has an initial speed of vo=10 miles/hour and ends up at vf=20 miles/hour in t=5 seconds.

Both speeds are given in miles/hour and we must convert it to m/s:

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The acceleration is calculated by solving for a:

\displaystyle a=\frac{v_f-v_o}{t}

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How is calculating amplitude​
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