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4 years ago

In a concave mirror parallel rays falling on it convergs at

Physics

1 answer:

ella [17]4 years ago

5 0

Answer:

1) In a concave mirror parallel rays falling on it converges at F and 2F.

Explanation:

Spherical mirrors can be used for magnification of images. There are basically two types of spherical mirrors and they are converging mirror and diverging mirrors. The converging mirrors are also termed as concave mirrors and its basic work is to converge or combine light rays coming from a larger distance to a single point. Mostly the light beams falling parallel to the principle axis of the concave mirror will be acting as parallel rays. And when these parallel rays fall on the mirror, the converging point can be the focal point of the mirror.

Thus the location of converging point in concave mirrors will be based on the position or distance of object from the mirror. If the object distance is very far from the twice the focal length distance of mirror, then the converging point will be the focal point or F. And if the object is placed slightly greater than twice the distance of focal point, then the image will be obtained at 2F. But the parallel beams will be converging at F and 2F.

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Which equation will tell you the acceleration of the object?

zvonat [6]

Answer:

In summation, acceleration can be defined as the rate of change of velocity with respect to time and the formula expressing the average velocity of an object can be written as: a =Δ v/ Δt The other 4 equations: d = vit+ (1/2) at2

Explanation:

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3 years ago

A wall is built of two metals (stainless steel and lead) that are in thermal contact with each other. If the temperature differe

Ksenya-84 [330]

Answer:

entire wall temperature difference = 29.29 K

Explanation:

given data

temperature difference steel ΔT = 17.79 K

steel L = 1.471 cm

lead L = 2.416 cm

to find out

temperature difference across wall

solution

we know that here heat transfer by steel and lead are same

and

heat transfer = k×A×ΔT / L ................1

H( lead) = H (steel)

k×A×ΔT / L = k×A×ΔT / L .................2

here we know

k for steel = 14.4 W/mK

k for lead = 36.6 W/mK

so put here all value in equation 2

k×ΔT / L = k×ΔT / L

36.6×ΔT / 2.416 = 14.4×17.79 / 1.471

ΔT = 11.50 K

entire wall temperature difference = 11.50 + 17.79

entire wall temperature difference = 29.29 K

8 0

3 years ago

The spreading of sound waves around openings in barriers is called

trapecia [35]

<span> it is called diffraction</span>

4 0

3 years ago

Read 2 more answers

amelia goes for mountering with some selected friend of her batch .Intially she is scared of it .Her trainer John tells her that

IRISSAK [1]

Answer:

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3 years ago

A peregrine falcon dives at a pigeon. The falcon starts with zero downward velocity and falls with the acceleration of gravity.

Reptile [31]

Answer:

t = 3.94 s

Explanation:

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$h = v_{i}t + \frac{1}{2}gt^2$

where,

h = height = 76 m

vi = initial speed of falcon = 0 m/s

t = time required = ?

g = acceleration due to gravity = 9.81 m/s²

Therefore,

$76\ m = (0\ m/s)(t) + \frac{1}{2}(9.81\ m/s^2)t^2\\t^2 = \frac{(2)(76\ m)}{9.8\ m/s^2}\\\\t = \sqrt{ 15.49\ s^2}\\$

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3 years ago