Answers:
1) 
2) 
Explanation:
1) Acceleration  is defined as the variation of Velocity
 is defined as the variation of Velocity  in time
 in time  :
 :  
 (1)
  (1)
A body also has acceleration when it changes its direction. 
In this case we have a bus with a velocity of 60m/s to the east, that accelerates in a time 10s. So, we have to find the bus's acceleration:
 (2)
  (2)
 (3)  This is the bus's accelerration
  (3)  This is the bus's accelerration
2) Now we have a car that accelerates  to the west in order to reach a speed of
  to the west in order to reach a speed of  in the same direction, and we have to find the time
 in the same direction, and we have to find the time  it takes to the car to reach that velocity.
 it takes to the car to reach that velocity.
Therefore we have to find   from (1):
 from (1):
 (4)
  (4)
 (5)
  (5)
Finally:
 (6)
  (6)
 
        
             
        
        
        
Answer:
The type and length of a lunar eclipse depend on the Moon's proximity to either node of its orbit. ... A total lunar eclipse can last up to nearly 2 hours, while a total solar eclipse lasts only up to a few minutes at any given place, due to the smaller size of the Moon's shadow.
 
        
             
        
        
        
Answer:
The required angular speed the neutron star is 10992.32 rad/s
Explanation:
 Given the data in the question;
mass of the sun M = 1.99 × 10³⁰ kg
 = 1.99 × 10³⁰ kg
Mass of the neutron star
M = 2( M
 = 2( M )
 )
M = 2( 1.99 × 10³⁰ kg )
 = 2( 1.99 × 10³⁰ kg )
M = ( 3.98 × 10³⁰ kg )
 = ( 3.98 × 10³⁰ kg )
Radius of neutron star R = 13.0 km = 13 × 10³ m
 = 13.0 km = 13 × 10³ m
Now, let mass of a small object on the neutron star be m
angular speed be ω .
.
During rotational motion, the gravitational force on the object supplies the necessary centripetal force.
GmM = / R
 = / R ² = mR
² = mR ω
ω ²
²
ω ² = GM
² = GM = / R
 = / R ³
³
ω = √(GM
 = √(GM = / R
 = / R ³)
³) 
we know that gravitational G = 6.67 × 10⁻¹¹ Nm²/kg²
we substitute
ω = √( (  6.67 × 10⁻¹¹ )( 3.98 × 10³⁰ ) ) / (13 × 10³ )³)
 = √( (  6.67 × 10⁻¹¹ )( 3.98 × 10³⁰ ) ) / (13 × 10³ )³)
ω = √( 2.65466 × 10²⁰ / 2.197 × 10¹²
 = √( 2.65466 × 10²⁰ / 2.197 × 10¹² 
ω = √ 120831133.3636777
 = √ 120831133.3636777
ω = 10992.32 rad/s
 = 10992.32 rad/s
Therefore, The required angular speed the neutron star is 10992.32 rad/s
 
        
             
        
        
        
The answer is 2 because a and b are slowing it down by condensing it and then freezing it so its not one, b and c are opposites because b slows it down whereas c speeds it up so its not 3, and number 4 is the same explanation for number 3
hope you pass :)
        
             
        
        
        
Answer:
B)
Explanation:
Negative (-) charge M will not move towards negative (-) charge K because, same charges will not attract each other in the given case
Negative (-) charge at the M tends to move towards positive (+) charge L in the direction of B) because opposite charges attract each other.