Answer:
3.79 m/s²
Explanation:
Given that:
The mass of refrigerator = 120 kg
The height of refrigerator = 2.20 m
The width of refrigerator = 85.0 cm = 0.85 m
Since the center of gravity is located at the geometrical center.
Then;
the center mass of refrigerator = h/2 = 2.20 m / 2
= 1.10 m
From width of refrigerator, the distance of center mass to either edge of refrigerator = 0.85 m / 2
= 0.425 m
So; the torque acting on the center mass due to the force F is:
the torque acting on the center mass due to the weight of the refrigerator is:
Thus, since the refrigerator does not tip over,
F(1.10 m) = w(0.425 m)
ma (1.10 m) = mg (0.425 m)
a (1.10 m) = g(0.425 m)
a = 3.79 m/s²
The mirror formula for the curved mirrors is 1/f = 1/v + 1/u.
Mirror Formula:
The mathematical expression determining the distance of image and distance of the object from the mirror, without drawing a ray diagram, is known as the mirror formula.
The mirrors whose reflecting surfaces are curved in nature are known as curved mirrors. The curved mirrors are either bulged outwards (convex mirrors) or bulged inwards (concave mirrors).
The mirror formula for the curved mirrors are given as,
here,
f is the focal length of the mirrors.
v is the image distance.
u is the object distance.
Thus, we can conclude that the mirror formula for the curved mirrors is 1/f = 1/v + 1/u.
Learn more about the mirror formula here:
brainly.com/question/14343950
Answer:
4.9N
Explanation:
The formula for weight is F = ma.
You plug in the mass of 0.5kg and an acceleration of 9.8 to get
F = (0.5)(9.8)
F = 4.9N
Answer : The final energy of the system if the initial energy was 2000 J is, 3500 J
Solution :
(1) The equation used is,
where,
= final internal energy
= initial internal energy
q = heat energy
w = work done
(2) The known variables are, q, w and
initial internal energy = = 2000 J
heat energy = q = 1000 J
work done = w = 500 J
(3) Now plug the numbers into the equation, we get
(4) By solving the terms, we get
(5) Therefore, the final energy of the system if the initial energy was 2000 J is, 3500 J
Sound waves are like waves in the ocean. when there is an earthquake under the water, the waves are created but, they do not move the water. This is because the water is acting as a medium for the energy produced by that earthquake. Because the energy stored in the sound wave needs particles to bounce off of the answer is D.