Answer:
The first 
Explanation:
Cause it will continue in motion till another force is applied
 
        
                    
             
        
        
        
Answer:
discrete lines are observed by the spectroscope, the emission of the lamp is of the ATOMIC source
Explanation:
Bulbs can emit light in several ways:
* When the emission is carried out by the heating of its filament, the bulb is called incandescent, in general its spectrum is similar to that of a black body, this is a continuous spectrum with a maximum dependent on the fourth power of the temperature of the filament.
* The emission can be by atomic transitions, in this case there is a discrete spectrum formed by the spectral lines of the material that forms the gas of the lamp, in general for the yellow emission the most used materials are mercury and sodium or a mixture of they.
Consequently, as discrete lines are observed by the spectroscope, the emission of the lamp is of the ATOMIC type
 
        
             
        
        
        
Answer:
the tension is 18513N
Explanation:
Given that 
mass = 1683kg
acceleration = 1.2m/s^2
acceleration due to gravity = 9.8m/s^2
T-mg =   ma
T = ma + mg
T = m(a +g)
T = 1683 kg(1.20 m/s2 + 9.8)
T = 1683 (11)
T = 18513N
therefore, the tension is 18513N
 
        
                    
             
        
        
        
Answer:
Explanation:
Formula of acceleration a = fm
A = 68 x 386
= 26248
 
        
             
        
        
        
Answer:
Explanation:
distance travelled 
s = 2πR
= 2 X 3.14 X 140 
= 880 m 
 final velocity = v
initial velocity = u 
distance travelled = s 
time = 60 s 
s = ut + 1/2 at²
880 = .5 x a x 60²
a = .244 m/s²
final velocity v = at
= .244 x 60 
= 14.66
centripetal acceleration at final moment 
v² /R
14.66 X 14.66 / 140 
= 1.53 m/s⁻²
1.53 m/s²
this is centripetal acceleration which acts towards the centre. 
tangential acceleration calculated a _t = .244 
redial acceleration ( centripetal ) = 1.53
Resultant acceleration 
R²= 1.53² + .244 ²
R = 1.55 m/s²
total force = 1.55 x 76 
= 118 N