Answer:
88 m/s
Explanation:
To solve the problem, we can use the following SUVAT equation:

where
v is the final velocity
u is the initial velocity
a is the acceleration
d is the distance covered
For the car in this problem, we have
d = 484 m is the stopping distance
v = 0 is the final velocity
 is the acceleration
 is the acceleration
Solving for u, we find the initial velocity:

 
        
             
        
        
        
Answer:
Copper
Explanation:
Capacitance is directly proportional to dielectric constant
Aluminium and zinc are highly reactive and have high dielectric contact.
Copper has less dielectric constant hence capacitance will decrease 
 
        
             
        
        
        
No I don’t think so. But it worth a try tho. Try it out.
        
             
        
        
        
Answer:

Explanation:
From the free-body diagram for the car, we have that the normal force has a vertical component and a horizontal component, and this component act as the centripetal force on the car:

Solving N from (2) and replacing in (1):

The centripetal acceleration is given by:

Replacing and solving for v:

 
        
             
        
        
        
Answer:
 4.16m/s²
Explanation:
According to Newtons second law;

Fm is the moving force
 is  the coefficient of kinetic friction between the child and the slide
 is  the coefficient of kinetic friction between the child and the slide
m is the mass 
g is the acceleration due to gravity
a is the acceleration of the child
Substitute the given values and get the acceleration as shown;
35(9.8)sin27.5 - 0.415(35)(cos27.5) = 35a
158.38-12.88 = 35a
145.49 = 35a
a = 145.49/35
a = 4.16m/s²
Hence the acceleration of the body is  4.16m/s²