I believe that we dream because we have memories of what have happened or what we have seen in the day
Answer:
C . All of the different types of electromagnetic waves
Please be determined and being hardworking person do not rely on the other people to make your problems solved
Explanation:
Ok?
The force of friction is 399.7 N
Explanation:
The force of friction acting on the bear is given by
(1)
where
is the coefficient of friction
N is the normal reaction exerted by the plane on the bear
The normal reaction can be found by analyzing the forces acting in the direction perpendicular to the plane: in fact, the bear is in equilibrium along this direction, so the normal reaction must balance the component of the weight perpendicular to the plane:
where:
m = 900 kg is the mass of the bear
is the acceleration of gravity
is the angle of the incline
Substituting everything into (1), we find the force of friction:
Learn more about inclined plane and frictional force here:
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Answer:
2 ms^2
Explanation:
Given that the mass of the refrigerator is 200Kg
The net force acting on the refrigerator is 400N
The time takes is 4s
From Newtons's second law of motion;
F =ma
a = F/m
a = 400/200
a = 2 ms^2
This is a constant acceleration