Answer:
the most accurate telescope
Explanation:
The resolution limit of any telescope is determined by the diffraction effects, which is described by the equation
a sinθ = m λ
Where a is the width of a linear slit, λ the wavelength and m e an integer that indicates the order of diffraction, in this case m = 1 is used to have the width of the central maximum,
sin θ = λ / a
Since the angles are very small, we can approximate the sine to the value of the Angle
θ = λ / a
In the case of circular objects, polar coordinates must be used, the expression changes to a constant
θ = 1.22 λ / a
Let's apply this equation to the two telescopes
Telescope
θ₁ = 1.22 5.0 10⁻⁷ / 2
θ₁ = 3.05 10⁻⁷ rad
Radio Telescope
θ₂ = 1.22 2.1 10⁻² / 10
θ₂ = 2.56 10⁻³ rad
We compare the two values
θ₁ <θ₂
the most accurate telescope
Potential energy relative to the surface is
(mass) x (<span>acceleration due to gravity) x (height above the surface).
At 1.0 meter above the surface, that is
</span> (mass) x (<span>acceleration due to gravity) x (1.0 meter) .
The object's mass doesn't change, so the only thing that has any effect
on its potential energy at 1 meter above the surface is the acceleration
of gravity or, in other words, the surface of <em><u>what</u></em> ?
</span>
the answer is spiral galaxies
#9). the <em>last </em>statement is true
Calculation using Ohm's Law:
It helps a lot if you know what Ohm's Law says.
It says: Current = (voltage) / (resistance)
Current = (500 volts) / (250 ohms)
<em>Current = 2 Amperes</em>
All electromagnetic waves travel at 3*10^8 ms⁻¹ , the equation for wave speed is v=wavelength*frequency. Therefore wavelength=v/f=3*10^8/600000000=0.5m