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2 years ago

12

A 15. 0 cm object is 12. 0 cm from a convex mirror that has a focal length of -6. 0 cm. What is the height of the image produced

by the mirror? –5. 0 cm 7. 5 cm -7. 5 cm 5. 0 cm.

1 answer:

ipn [44]2 years ago

6 0

Answer:

–5. 0 cm

Explanation:

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Astronomers have observed a small, massive object at the center of our Milky Way Galaxy. A ring of material orbits this massive

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Answer:

The mass of the massive object at the center of the Milky Way galaxy is $3.44\times10^{37}\ Kg$

Explanation:

Given that,

Diameter = 10 light year

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Take the distance of one light year to be 9.461×10¹⁵ m. I was able to get this it is 4.26×10³⁷ kg.

We need to calculate the radius of the orbit

Using formula of radius

$r=\dfrac{d}{2}$

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$r=7.09\times10^{16}\ m$

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Using formula of mass

$M=\dfrac{v^2r}{G}$

Put the value into the formula

$M=\dfrac{(180\times10^3)^2\times7.09\times10^{16}}{6.67\times10^{-11}}$

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3 years ago

Joe the house painter stands on a uniform oak board weighing 600 N and held up by vertical ropes at each end. Joe has been dieti

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Answer

given,

weight of the oak board = 600 N

Weight of Joe = 844 N

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vertical wire is supporting at the end.

Assuming the system is in equilibrium

T₁ and T₂ be the tension at the ends of the wire

equating all the vertical force

T₁ + T₂ = 600 + 844

T₁ + T₂ = 1444...........(1)

taking moment about T₂

T₁ x 4 - 844 x 3 - 600 x 2 = 0

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T₁ = 933 N

from equation (1)

T₂ = 1444 - 933

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A Ferris wheel on a California pier is 27 m high and rotates once every 32 seconds in the counterclockwise direction. When the w

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A) 140 degrees

First of all, we need to find the angular velocity of the Ferris wheel. We know that its period is

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So the angular velocity is

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