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3 years ago

The mass of a body on the surface of the earth is 12kg. If acceleration due to gravity on

1 answer:

4 0

The mass is still 12kg. Mass is the amount of matter, so that is independent of gravity. However, weight differs. Weight of this object on earth would be 117.6 N and 19.6 N on the moon.

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#26 question

4vir4ik [10]

So, the time that taken for the astronaut to fall to the surface of the moon is <u>2.5 s.</u>

<h3>Introduction</h3>

Hi ! In this question, I will help you. In this question, you will learn about the fall time of the free fall motion. Free fall is a downward vertical motion without being preceded by an initial velocity. When moving in free fall, the time required can be calculated by the following equation:

$\sf{h = \frac{1}{2} \cdot g \cdot t^2}$

$\sf{\frac{2 \cdot h}{g} = t^2}$

$\boxed{\sf{\bold{t = \sqrt{\frac{2 \cdot h}{g}}}}}$

With the following condition :

t = interval of the time (s)
h = height or any other displacement at vertical line (m)
g = acceleration of the gravity (m/s²)

<h3>Problem Solving</h3>

We know that :

h = height = 5.00 m
g = acceleration of the gravity = 1.6 m/s²

What was asked :

t = interval of the time = ... s

Step by step :

$\sf{t = \sqrt{\frac{2 \cdot h}{g}}}$

$\sf{t = \sqrt{\frac{2 \cdot 5}{1.6}}}$

$\sf{t = \sqrt{6.25}}$

$\boxed{\sf{t = 2.5 \: s}}$

<h3>Conclusion</h3>

So, the time that taken for the astronaut to fall to the surface of the moon is 2.5 s.

Time that needed for hearing the splash of fallen rock in the well brainly.com/question/26485521
The speed of the object at a certain height (free fall motion) brainly.com/question/26377041
The relationship between acceleration and the change in velocity and time in free fall brainly.com/question/26486625

3 0

3 years ago

Calculate the average velocity of object over the first 10 seconds of the trip

kirza4 [7]

Answer:

in order to find the average velocity use change in Displacement / change in time?

Explanation:

6 0

3 years ago

A. Water has many unique properties. Identify a property of water and explain why this property makes water vital to living orga

rosijanka [135]

a) It can dissolve other substances and has high specific heat capacity.

b) Pressure is transferred equally in all directions

c) F=14*0.04/0.02=28 N

d) I'd expect that it will sink cause weight will pull it to the bottom

e) Because the buoyant force is stipulated by difference between pressures in the top and bottom surfaces of a body.

f) Because this force increases in denser liquids: $F_b=\rho gV$ , where rho is density.

g) Q=Av, where v - speed, A - area. With the same flow rate v=Q/A, so larger area decreases speed and vice versa.

8 0

3 years ago

Consider an electron in an infinite well of width 0.7 nm . What is the wavelength of a photon emitted when the electron in the i

ollegr [7]

Answer:

λ = 538.0 nm

Explanation:

The solution of the Schrödinger equation for the inner part of the well gives energy

$E_{n}$ = (h² / 8mL²) n²

Where n is an integer and L is the length of the well

They ask for the transition from the first excited state n = 2 to the base state n = 1

E₂ - E₁ = = (h² / 8mL²) (n₂² - n₁²)

Let's calculate

E₂-E₁ = (6.63 10⁻³⁴)² / (8 9.1 10⁻³¹ (0.7 10⁻⁹)²) (2² -1²)

E₂ –E₁ = 3.6968 10⁻¹⁹ J

Let's use the Planck equation

E = h f

c = λ f

E = h c / λ

E = E₂ ₂- E₁

h c / λ = 3.6968 10⁻¹⁹

λ = h c / (E₂-E₁)

λ = 6.63 10⁻³⁴ 3 10⁸ / 3.6968 10⁻¹⁹

λ = 5.380 10⁻⁷ m

Let's reduce

λ = 5.380 10⁻⁷ m (10 9 nm / 1 m)

λ = 538.0 nm

4 0

4 years ago

1. Using the data from M7:<br>Which four countries are the worst in releasing CO2?

krek1111 [17]

Answer:

China, US, India, and Russia

7 0

3 years ago