Kinetic energy is _____.inversely proportional to mass and velocity directly proportional to mass and velocity directly proporti
2 answers:
Answer : The correct option is, directly proportional to mass and velocity.
Explanation:
Kinetic energy : It is associated with the state of motion of an object.
The formula used for kinetic energy is,
where,
m = mass of an object
v = velocity or speed of an object
From the formula of kinetic energy we conclude that,
The kinetic energy is directly proportional to the mass and the velocity of an object.
Hence, the kinetic energy is directly proportional to mass and velocity.
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Answer:
1) P₁ = -2 D, 2) P₂ = 6 D
Explanation:
for this exercise in geometric optics let's use the equation of the constructor
where f is the focal length, p and q are the distance to the object and the image, respectively
1) to see a distant object it must be at infinity (p = ∞)
q = f₁
2) for an object located at p = 25 cm
We can that in the two expressions we have the distance to the image, this is the distance where it can be seen clearly in general for a normal person is q = 50 cm
we substitute in the equations
1) f₁ = -50 cm
2)
= 0.06
f₂ = 16.67 cm
the expression for the power of the lenses is
P =
where the focal length is in meters
1) P₁ = 1/0.50
P₁ = -2 D
2) P₂ = 1 /0.16667
P₂ = 6 D