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3 years ago

What is the definition of gravity in simple terms?

Physics

1 answer:

Tema [17]3 years ago

3 0

Answer:

Gravity, also called gravitation, in mechanics, the universal force of attraction acting between all matter. ... On Earth all bodies have a weight, or downward force of gravity, proportional to their mass, which Earth's mass exerts on them. Gravity is measured by the acceleration that it gives to freely falling objects

1 : A force of attraction that tends to draw particles or bodies together.

2 : The attraction of bodies by the force of gravity toward the center of the earth.

3 : Great seriousness.

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Suggest and explain two ways to reduce heat loss through the doors of the house.

emmainna [20.7K]

Keep the doors closed and make sure there isnt lots of open space between the door and the frame

8 0

4 years ago

Use the drop-down menus to order the steps for writing chemical formulas. Balance the charges. Identify the negative ion and cha

daser333 [38]

Answer:

The order of steps for writing a chemical formula is 3, 2, 1, 5, 4

Explanation:

Balance the charges. Identify the negative ion and charge. Identify the positive ion and charge. Use the information in the ratio to write the chemical formula. Write the ratio of ions that balances the charges.

The order of steps for writing a chemical formula from the options above is:

3.) Identify the positive in and charge.

2.) Identify the negative ion and charge.

1.) Balance the charges.

5.)Write the ratio of ions that balances the charges.

4.) Use the information in the ratio to write the chemical formula.

6 0

3 years ago

Two containers have a substantial amount of the air evacuated out of them so that the pressure inside is half the pressure at se

adoni [48]

Answer:

$(a)\ F_{No} = [P_{No} - \frac{P_{area}}{2}]* A$

$(b)\ F_{No} = 771.125N$

Explanation:

Given

$d_D = 6000ft$ ---- Altitude of container in Denver

$A = 0.0155m^2$ -- Surface Area of the container lid

$P_D = 79000Pa$ --- Air pressure in Denver

$P_{No} = 100250Pa$ --- Air pressure in New Orleans

<em>See comment for complete question</em>

Solving (a): The expression for $F_{No$

Force is calculated as:

$F = \triangle P * A$

The force in New Orleans is:

$F_{No} = \triangle P * A$

Since the inside pressure is half the pressure at sea level, then:

$\triangle P = P_{No} - \frac{P_{area}}{2}$

Where

$P_{area} = 101000Pa$ --- Standard Pressure

Recall that:

$F_{No} = \triangle P * A$

This gives:

$F_{No} = [P_{No} - \frac{P_{area}}{2}]* A$

Solving (b): The value of $F_{No$

In (a), we have:

$F_{No} = [P_{No} - \frac{P_{area}}{2}]* A$

Where

$A = 0.0155m^2$

$P_{No} = 100250Pa$

$P_{area} = 101000Pa$

So, we have:

$F_{No} = [100250 - \frac{101000}{2}] * 0.0155$

$F_{No} = [100250 - 50500] * 0.0155$

$F_{No} = 49750* 0.0155$

$F_{No} = 771.125N$

4 0

3 years ago

The Sun being the largest body has the highest gravitational pull on all planets however planets do not collapse into the sun th

mojhsa [17]

Answer:

A:gravitational of the earth

7 0

3 years ago

A helicopter is hovering above the ground. Jim reaches out of the copter (with a safety harness on) at 180 m above the ground. A

vesna_86 [32]

Answer:

The maximum height of the package is 140 m above the ground. Jim Bond will not catch the package.

Explanation:

Hi there!

The equation of height and velocity of the package are the following:

h = h0 + v0 · t + 1/2 · g · t²

v = v0 + g · t

Where:

h = height of the package at time t.

h0 = initial height.

v0 = initial velocity.

t = time.

g = acceleration due to gravity (-9.81 m/s² because we consider the upward direction as positive).

v = velocity of the package at a time t.

First, let´s find the time it takes the package to reach the maximum height. For this, we will use the equation of velocity because we know that at the maximum height, the velocity of the package is zero. So, we have to find the time at which v = 0:

v = v0 + g · t

0 = 50.5 m/s - 9.8 m/s² · t

Solving for t:

-50.5 m/s / -9.81 m/s² = t

t = 5.15 s

Now, let´s find the height that the package reaches in that time using the equation of height. Let´s place the origin of the frame of reference on the ground so that the initial position of the package is 10 m above the ground:

h = h0 + v0 · t + 1/2 · g · t²

h = 10 m + 50.5 m/s · 5.15 s - 1/2 · 9.81 m/s² · (5.15 s)²

h = 140 m

The maximum height of the package is 140 m above the ground. Jim Bond will not catch the package.

6 0

3 years ago