Answer:
Option C is the untrue statement.
 
        
                    
             
        
        
        
Answer:

Explanation:
 = Mass of the Earth =  5.972 × 10²⁴ kg
 = Mass of the Earth =  5.972 × 10²⁴ kg
G = Gravitational constant = 6.67 × 10⁻¹¹ m³/kgs²
r = Radius of Earth = 6371000 m
m = Mass of person
The force on the person will balance the gravitational force

The acceleration that the Earth will feel is 
 
        
             
        
        
        
Answer:
The two methods will yield different results as one is subject to experimental errors that us the Archimedes method of measurement, the the density measurement method will be more accurate
Explanation:
This is because the density method using the calculated volume will huve room for less errors that's occur in practical method i.e Archimedes method due to human error
 
        
             
        
        
        
Answer:
(a) The energy of the photon is 1.632 x  J.
 J.
(b) The wavelength of the photon is 1.2 x  m.
 m.
(c) The frequency of the photon is 2.47 x  Hz.
 Hz.
Explanation:
Let;
 = -13.60 ev
 = -13.60 ev
 = -3.40 ev
 = -3.40 ev
(a) Energy of the emitted photon can be determined as;
 -
 -  = -3.40 - (-13.60)
 = -3.40 - (-13.60)
            = -3.40 + 13.60
            = 10.20 eV
            = 10.20(1.6 x  )
)
 -
 -  = 1.632 x
 = 1.632 x  Joules
 Joules
The energy of the emitted photon is 10.20 eV (or 1.632 x  Joules).
 Joules).
(b) The wavelength, λ, can be determined as;
E = (hc)/ λ
where: E is the energy of the photon, h is the Planck's constant (6.6 x  Js), c is the speed of light (3 x
 Js), c is the speed of light (3 x  m/s) and λ is the wavelength.
 m/s) and λ is the wavelength.
10.20(1.6 x  ) = (6.6 x
) = (6.6 x  * 3 x
 * 3 x  )/ λ
)/ λ
λ = 
   = 1.213 x 
Wavelength of the photon is 1.2 x  m.
 m.
(c) The frequency can be determined by;
E = hf
where f is the frequency of the photon.
1.632 x  = 6.6 x
  = 6.6 x  x f
 x f
f = 
  = 2.47 x  Hz
 Hz
Frequency of the emitted photon is 2.47 x  Hz.
 Hz.
 
        
             
        
        
        
So you would use the equation Q=cmΔT, where c is the specific heat, m is the mass, and ΔT is change in temperature. Q, or heat added, would equal (0.187)(2.5)(350-45), which simplifies to 142.5875 btu.