Answer
given,
Radius of sphere = 6.38 × 10⁶ m
time = 1 day = 86400 s



a) at equator


v = 464 m/s
acceleration of the person



b) at a latitude of 61.0 ° north of the equator.






acceleration of the person



The gravitational force between two objects may be calculated through the equation,
F = Gm₁m₂ / d²
where G is 6.67 x 10^-11 m³/s²kg
Substituting the known values to the equation,
F = (6.67 x 10^-11 m³/s²kg)(5.0 kg)(5.0 kg) / (2.5 m)²
F = 2.668 x 10^-10 N
Answer:

Explanation:
The energy emitted by a single photon is given by:

where
h is the Planck constant
c is the speed of light
is the wavelength of the photon
For the photons emitted by the zinc atoms,

So the energy of a single photon emitted is

And since the number of atoms is

The total energy emitted will be
