Answer:
If the starting GPE is doubled than it's KE would also double.
D , since Voltage is one joule per coulomb
I’m pretty sure it’s a starting point... unless it’s asking for an actual object
Answer:
.09 mm
Explanation:
In case of diffraction by single slit with width a the width of central maxima is given below
width = 2 λD/a
where λ is wavelength of light , D is distance of screen , a is width o slit
substituting the given values
14 x 10⁻³ = 
a = .09 mm
b) If a is greater , width of central maxima will be less wide.