They study weather and climate.
Mass is always constant. Everything that is matter, which takes up space, has a mass. so therefore, mass is always constant.
Answer:
the answer to ur questioj is 10 kg
The height of the cliff will be 25.05 m. The height of the cliff is obtained by the Newton equation of motion.
<h3>What is height?</h3>
The vertical distance between the object's top and bottom is defined as height. It is measured in centimeters, inches, meters, and other units.
The given data in the problem is;
Mass of diver(m)=90 kilogram
Time period(t)=2.26 sec
Initial velocity (u)=0 m/sec
The height attained by the cliff is;
Hence, the height of the cliff will be 25.05 m.
To learn more about the height, refer to the link;
brainly.com/question/10726356
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Answer:
f = - 20 cm
Explanation:
This exercise asks us for the focal length, which for a lens in air is
1 / f = (n₂-n₁) (1 / R₁ - 1 / R₂)
where n₂ is the refractive index of the material, n₁ is the refractive index of the medium surrounding the lens, R₁ and R₂ are the radii of the two surfaces.
In this exercise the medium that surrounds the lens is air n₁ = 1 and the lens material has an index of refraction n₂ = n = 1.50, let's substitute in the expression
- 1/40 = (n-1) (1 / R₁ -1 / R₂)
(1 / R₁ - 1 / R₂) = - 1/40 (n-1)
let's calculate
(1 / R₁ -1 / R₂) = - 1/40 (1.50 -1)
(1 / R₁ -1 / R₂) = -1/20
Now we change the construction material for one with refractive index
n = 2, keeping the radii,
1 / f = (n-1) (1 / R₁-1 / R₂)
1 / f = (n-1) (-1/20)
let's calculate
1 / f = (2.00-1) (-1/20)
1 / f = -1/20
f = - 20 cm