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3 years ago

For life to flourish on Earth, several changes occurred that affected the atmosphere, such as _____.

1 answer:

8 0

Evolution of cyanobacteria that produce O2volcanic outgassing to create a thicker atmosphereformation of an ozone layer to block harmful radiationall of the aboveonly a and c

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An iron anchor of density 7810.00 kg/m^3 appears 252 N lighter in water than in air. (a) What is the volume of the anchor?(b) Ho

RSB [31]

Answer:

(a)The volume of the iron anchor = 25.2 m³

(b)The mass of iron = 196812 kg

Explanation:

Density: This is the ratio of the mass of a body to its volume. The S.I unit of density is kg/m³

(a)

From Archimedes principle, the iron will displace a volume of water that is equal to its volume. And the weight of water displaced is equal to loss in weight or upthrust.

Therefore, Upthrust = lost in weight = weight of water displace.

Therefore, Volume of the iron = mass of water displace/density of water

Vi = m₁/D₁........................... Equation 1

Where Vi = volume of iron, m₁ = mass of water displaced, D₁ = Density of water.

Given: upthrust = 252 N, ∴ m₁ = 252/10 = 25.2 kg.

Constant: D₁ = 1.0 kg/m³

Substituting these values into equation 1,

Vi = 25.2/1.0

Vi = 25.2 m³

Therefore the volume of the iron anchor = 25.2 m³

(b)

Density of the iron = mass of the iron/volume of the iron.

Therefore, Mass of the iron = Density of the iron × volume of the iron...........................................equation 2

Given: Density of the iron = 7810 kg/m³, Volume of the iron = 25.2 m³

Substituting these values into equation 2,

Mass of the iron = 7810×25.2

Mass of the iron = 196812 kg.

Therefore the mass of iron = 196812 kg

8 0

3 years ago

The motion of an object undergoing constant acceleration can be modeled by the kinematic equations. One such equation is xf=xi+v

Mademuasel [1]

Answer:

a = -04978 m / s²

Explanation:

For this exercise we can use the kinematics equations, as the initial speed, distance and time indicate, we can use

x = x₀ + v₀ t + 1 /2 a t²

½ a t² = x-x₀ - v₀ t

a = (x-x₀ - v₀ t) 2 / t²

let's reduce the magnitudes to the SI system

x₀ = 1000 mm = 1 m

x = 5000mm = 5m

let's calculate

a = (5 - 1 - 15 60) 2/60²

a = -04978 m / s²

negative sign indicates that braking is related

7 0

3 years ago

(Please help 15 points the assignment is late) (multiple questions) (everything is virtual task )

krok68 [10]

Answer:

i & 2

Explanation:

U alr finished it so there's no point

5 0

2 years ago

An iron anchor of density 7850.00 kg/m3 appears 183 N lighter in water than in air.

andrew11 [14]

<h2>a) Volume of anchor is 0.019 m³</h2><h2>b) Weight of anchor in air is 1463.17 N</h2>

Explanation:

a) Weight loss in water = Volume of object x density of water x acceleration due to gravity

183 = Volume of anchor x 1000 x 9.81

Volume of anchor = 0.019 m³

b) Weight = Mass x acceleration due to gravity = Volume x Density x acceleration due to gravity

Weight of anchor in air = Volume of anchor x Density of anchor x acceleration due to gravity

Weight of anchor in air = 0.019 x 7850 x 9.81 = 1463.17 N

Weight of anchor in air = 1463.17 N

3 0

3 years ago

Explain the relationship between mass and acceleration

ycow [4]

Answer:

Explanation: Newton's second law of motion pertains to the behavior of objects for which all existing forces are not balanced. The second law states that the acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object. The acceleration of an object depends directly upon the net force acting upon the object, and inversely upon the mass of the object. As the force acting upon an object is increased, the acceleration of the object is increased. As the mass of an object is increased, the acceleration of the object is decreased.

3 0

3 years ago

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