Answer:

Explanation:
Area of the solar sail = A = 30 m2
Solar constant = I = 1388 W/m2
Planck's constant = h = 6.626 × 10⁻³⁴ m²kg/s
Speed of light = c = 3×10⁸ m/s
Wavelength of light =
= 570 nm
Pressure from radiation

Energy of a photon

Number of photons

Number of photons is 
"Twice each second" means "2 per second". <em>Frequency = 2 Hz.</em>
<em>Period </em>= time for one bounce = <em>1 second</em>
Amplitude = distance between "not stretched" and "greatest stretch".
<em>Amplitude = 10 centimeters</em>
If you're moving, then you have kinetic energy.
If you're not at the bottom yet, then you still have
some potential energy left.
the number of electrons that fill the outer shell determines the properties of elements