Answer:
The answer is
<h2>28 kg</h2>
Explanation:
The mass of an object given it's momentum and velocity / speed can be found by using the formula

where
m is the mass
p is the momentum
v is the speed or velocity
From the question
p = 280 kg/ms
v = 10 m/s
The mass of the object is

We have the final answer as
<h3>28 kg</h3>
Hope this helps you
 
        
             
        
        
        
Given parameters: 
Mass of the car = 1000kg 
Unknown: 
Height  = ? 
To find the heights for the different amount potential energy given, we need to understand what potential energy is. 
Potential energy is the energy at rest due to the position of a body. 
  It is mathematically expressed as: 
           P.E  = mgh 
m is the mass 
g is the acceleration due to gravity = 9.8m/s²
h is the height of the car
Now the unknown is h, height and we make it the subject of the expression to make for easy calculation. 
                h = 
<u>For 2.0 x 10³ J;</u>
                   h  =  = 0.204m
   = 0.204m 
<u>For 2.0 x 10⁵ J;</u>
                   h  =  = 20.4m
   = 20.4m 
<u>For 1.0kJ  = 1 x 10³J; </u>
                   h  =  = 0.102m
   = 0.102m
    
 
        
             
        
        
        
Answer:
The greater the amplitude the greater the energy.
(Think of a water wave - which carries greater energy a 1 ft wave or
a 10 ft wave)
 
        
             
        
        
        
The radial velocity method preferentially detects large planets close to the central star
- what is the Radial velocity:
The radial velocity technique is able to detect planets around low-mass stars, such as M-type (red dwarf) stars. 
This is due to the fact that low mass stars are more affected by the gravitational tug of planets.
When a planet orbits around a star, the star wobbles a little. 
From this, we can determine the mass of the planet and its distance from the star.
hence we can say that,
option D is correct.
The radial velocity method preferentially detects large planets close to the central star
Learn more about radial velocity here:
<u>brainly.com/question/13117597</u>
#SPJ4
 
        
             
        
        
        
Radiometric dating?
Also, possibly radiocarbon dating