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3 years ago

Which effect has been useful (and successful) in the search for and identification of black holes in the universe

Physics

1 answer:

kvasek [131]3 years ago

4 0

Answer:

Detection of x-rays from a binary star undergoing mass exchange, where mass of component star can be determined.

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What is the force on a 1670kg elevator accelerating at 6m/s square?

marshall27 [118]

As per Newton's 2nd law

we know that

$F = ma$

it is product of mass and acceleration

here we know that

$m = 1670 kg$

also we know that

$a = 6 m/s^2$

so from above equation we have

$F = 1670 * 6$

$F = 10020 N$

so the force here will be 10020 N

7 0

3 years ago

What is the eyepiece?

Yuki888 [10]

Answer:

in a microscope the place you keep your eyes to observe

5 0

4 years ago

Read 2 more answers

A Dodge Stealth is driving at 70 mph on a highway. It passes a BMW going the same direction. The BMW is moving 7 mph backward re

Tasya [4]

A Dodge Stealth is driving at 70 mph on a highway. It passes a BMW going the same direction. The BMW is moving 7 mph backward relative the Dodge. 63 mph is the velocity of the BMW

Answer: Option A

<u>Explanation:</u>

Given is the speed of the dodge stealth as 70 mph passing by the BMW moving with 7 mph relative to Dodge. Thereby, to calculate the velocity of BMW, relative velocity concept has to be employed.

As we know that the relative velocity tells us about relative velocity of mobile reference system as the difference or sum of the initial reference system.

Therefore,

velocity of the BMW = $v_{b}$

Velocity of the dodge = $v_{d}$

Velocity of the BMW with respect to dodge = $V_{b d}$

As per the formula,

$v_{b d}=v_{b}-v_{d}$

$v_{b} = v_{d} + v_{b d} = 70 + (-7) = 70 - 7 = 63 \mathrm{mph}$

5 0

3 years ago

Calculate the limit of resolution for the oil lens of your microscope. assume an average wavelength of 500 nm

natima [27]

The resolution of a microscope is the distance with the shortest measurement between two different points given a specimen with the premise that it can still be seen clearly or distinguished by the one looking through the microscope. It can be calculate from the ratio of the wavelength of the light and twice the numerical aperture or the refractive index of the lens. Most of the microscopes have a numerical aperture ranging from 1.2 to 1.4. Resolution and the numerical aperture are indirectly proportional so that as the aperture increases the resolution would decrease. We calculate as follows:

<span>Resolution = wavelength / ((2) (numerical aperture))
Resolution = 500 nm / (2 ) ( 1.25) = 200 nm = 0.2 um</span>

3 0

4 years ago

Consider the electric field lines shown in the diagram below. From the diagram, it is apparent that object A is ____ and object

Mariana [72]

Positive charge you gave the lines pointing away, negative charge is pointing toward. Don’t have a photo so I can’t fill in the blanks BUT I can tell you the logic

6 0

2 years ago