Answer:
B
Explanation:
Solar power takes in light and turns it into a usable energy. if used in a vehicle that would take light energy and transform it into mechanical energy.
The correct answer is C) A substance changes color when heated, but changes back when cooled. Hope this helps.
Answer:
5.449 x 10¹⁸ Hz
Explanation:
Energy (E) =Frequency (F) x Plancks constant (h)
F= 3.611x10⁻¹⁵J / 6.626 x 10⁻³⁴ Js⁻¹
F =5.449 x10¹⁸ s⁻¹ or 5.449 x 10¹⁸ Hz
<span>After six years, 1.21875 gram of uranium will remain, since uranium loses half of its mass each year. At end of year 1, 39 gram is left. At end of year 2, 19.5 gram; at end of year 3, 9.75 gram; at end of year 4, 4.875 gram; at end of year 5, 2.4375 gram and finally, at end of year 6, 1.21875 gram is left.</span>
