Aglow-worm of mass 5.0 g emits red light (650 nm) with a power of 0.10 w entirely in the backward direction. to what speed will it have accelerated after 10 y if released into free space and assumed to live

The speed is 21.06 m/s.

Explanation:

Given that,

mass of glow worm = 5.0 g

Wavelength = 650 nm

Power = 0.10 W

Time = 10 years

The total energy emitted in a period is

The energy of single photon of frequency or wavelength is

The total number of photons emitted in a interval is then the total energy divided by the energy per photon.

We need to calculate the speed

Using de Broglie's relation applies to each photon and thus the total momentum imparted to the glow-worm

Put the value into the formula

Hence, The speed is 21.06 m/s.

d. air pressure decreases as altitude increases.

pretty sure it's false