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Usimov [2.4K]
3 years ago
14

Which statement is true of a concave lens?

Physics
2 answers:
natka813 [3]3 years ago
5 0
It produces only virtual images is the answer
vampirchik [111]3 years ago
3 0

Answer: The correct answer is Option A.

Explanation:

Concave lens is a type of spherical lens.

This lens is known as diverging lens which means that the light rays gets diverged after refraction.

The nature of the image formed by these lens is that they will be virtual, size of the image will be less than the object and the image formed will be upright.

Hence, from the above information, we conclude that the right answer is option A.

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An archer puts a 0.30 kg arrow to the bowstring. An average force of 201 N is exerted to draw the string back 1.3 m.a. Assuming
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Answer:

Explanation:

Given

mass of archer m=0.3\ kg

Average force F_{avg}=201\ N

extension in arrow x=1.3\ m

Work done to stretch the bow with arrow

W=F\cdot x

W=201\times 1.3=261.3\ m

This work done is converted into kinetic Energy of arrow

W=\frac{1}{2}mv^2

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261.3=\frac{1}{2}\times 0.3\times v^2

v=\sqrt{1742}

v=41.73\ m/s

(b)if arrow is thrown vertically upward then this energy is converted to Potential energy

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261.3=0.3\times 9.8\times h

h=\frac{261.3}{0.3\times 9.8}

h=88.87\ m

   

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3 years ago
When the object is at half its amplitude from equilibrium, is the magnitude of its acceleration at half its maximum value?
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4 years ago
The engine of a locomotive exerts a constant force of 8.1*10^5 N to accelerate a train to 68 km/h. Determine the time (in min) t
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Answer:443.1 s

Explanation:

Given

Engine of a locomotive exerts a force of 8.1\times 10^5 N

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a=0.042631 m/s^2

and acceleration is

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0.042631=\frac{18.88-0}{t}

t=443.089 \approx 443.1 s

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