When a fluid (liquid or gas) is heated. its volume increases in it sinks

True or false

Answer: 40J

Explanation:

Gravitational potential energy is defined as the mass of the object, multiplied by the acceleration due to gravity, and the height from your arbitrary reference point. If we assume that the floor has a gravitational potential of zero, then the gravitational potential of the book on the shelf would be:

[tex]U=mgh[/tex]

We were given the weight of the book, not the mass. In order to find the mass of the book, we need to divide the weight by the acceleration of gravity. We have that:

[tex]Mass=Weight/Gravity[/tex]

[tex]Mass=16N/9.8m/s^2[/tex]

[tex]Mass=1.63kg[/tex]

Plug everything into the gravitational potential formula to get:

[tex]U=(1.63kg)*(9.8m/s^2)*(2.5m)[/tex]

[tex]U=40J[/tex]

The gravitational potential energy of the book placed 2.5 m above from the ground is 40 joules.

The energy of the body due to its position with reference to some other body is called the potential energy of the two - body system.

Given is an object whose weight is 16 N placed on a shelf that is 2.5 m from the ground.

The weight of the book is -

W = mg = 16 N

The gravitational potential energy of the book will be -

E = mgh = 16 x 2.5 = 40 joules

Therefore, the gravitational potential energy of the book placed 2.5 m above from the ground is 40 joules.

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If you could hear it at all, it would sound very soft.

Answer:

C

Explanation:

because it's new chemical substances

Answer: Seatbelts relate to Newton's first law of motion because in the case of a car accident, someone in the car would continue forward until they hit somethng else. A seat belt will help prevent this because it will push back on you (action-reaction force).

Explanation:

Answer:

Option A

Explanation:

Your answer is the first option or "C/kg." C/kg is a ratio for specific charge. C for the charge of the electron, kg for the mass of the electron. To find the specific charge we divide the two, which usually involves scientific notations and simplifying.

Example:
[tex]\frac{C}{kg}[/tex]
[tex]\frac{3.4\times10^3C}{2.7\times10^5kg}[/tex]

Hope this helps.

Answer:

Horizontal translation of six units

Explanation:

Answer:

C) The nuclei and electrons of the atoms are attracted to each other.

Answer:

electromagnetic radiation

Answer:

1 million.

Explanation:

Answer: 100 Billion

Explanation: Scientists believe around  100 Billion Galaxies that exist across the observable universe

Answer:

Red has the lowest energy and violet the highest. Beyond red and violet are many other kinds of light our human eyes can't see, much like there are sounds our ears can't hear. On one end of the electromagnetic spectrum are radio waves, which have wavelengths billions of times longer than those of visible light.

Explanation:

Answer:

Explanation:

Work = 1.31 × 10³ = 1310

F = W/D = 1310/76.2

≈ 17.19N

An amount of cement is lifted 76.2 m by arcane, which exerts a force on the cement that is slightly larger than the weight of the cement. If the network done on the cement is 1.31 × 103 J, 17.19N is the magnitude of the net force exerted on the cement.

In mechanics, force is defined as any action that seeks to sustain or modify the movement of a body or even to deform it. The idea of force is frequently defined in terms of Isaac Newton's three laws of motion, which are laid forward by book Principia Mathematica (1687).

Newton's first principle is that a body at rest and moving uniformly inside a single direction will continue in that condition unless another force is exerted to it.

Work = 1.31 × 10³ = 1310J

Force = Work/Distance

          = 1310/76.2

          ≈ 17.19N

Therefore,  17.19N is the magnitude of the net force exerted on the cement.

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Answer and Explanation:

The law of conversation of energy states that energy cannot be created or destroyed. The pendulum slows down and stops eventually not because the kinetic energy is destroyed, but it is transferred into sound and heat energy instead because there is air resistance and friction.

Kinetic energy => Gravitational potential energy (Loop but some energy transferring to heat and sound each time)

Answer:

Sometimes Earth moves between the sun and the moon. When this happens, Earth blocks the sunlight that normally is reflected by the moon. (This sunlight is what causes the moon to shine.) Instead of light hitting the moon's surface, Earth's shadow falls on it.

Explanation:

I Just Know

Explanation:

F =(frac{1}{4{pi}{varepsilon}_o}) x (frac {q_1q_2}{r^2})

F =(frac {5 {times} 10 {times} 8 {times} 10}{0.002 {times} 0.002}) x 9 x 10

F = 900N

The X and Y components of the force are 90.63 Newton and 42.26 Newton respectively.

Given the following data:

To determine the X and Y components of the force:

Mathematically, the horizontal component of a force is given by this formula:

[tex]F_x = Fcos \theta\\\\F_x =100 \times cos25\\\\F_x =100 \times 0.9063[/tex]

Fx = 90.63 Newton.

Mathematically, the vertical component of a force is given by this formula:

[tex]F_y = Fsin \theta\\\\F_y =100 \times sin25\\\\F_y =100 \times 0.4226[/tex]

Fy = 42.26 Newton.

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Answer:

A student is pushing a = 35 kg desk across a floor at a constant speed of 1 = 4 m/s. How

much work, to the nearest whole joule, must the student do on the desk to change the speed to

2 = 6 m/s?

Solution:

Work done = change of energy

=

2

2

2

−

1

2

2

=

35 × 36

2

−

35 × 16

2

= 630 − 280 = 350 J

Answer = 350 J

pls give me brainlieste

Answer:

2.0 N is the answer

Explanation:

Hope this helps ;D

Answer:

P V = N R T    is the ideal gas equation

P2 / P1 = T2 / T1

The pressure will increase.

Answer:

My aunt died and I am felling down today

1) wavelength is 2

6m is 3 wavelengths so 6 = 3.. to find for one wavelength divide both sides by 3

6 = 3

2(m) = 1(wavelength)

2) amplitude is half of what they've given

2/2 = 1m

3) f = 1/t

time period = 1.5s for 3 wavelengths

time period for one wavelength is 1.5/3 = 0/5

so f = 1/0.5 = 2 Hz

Answer:

gas

Explanation:

because water become gas when above 100 celcius

Answer:

Gaseous (vapor) state

Explanation:

Because the boiling point of water is 100 C, then anything above that temperature would mean it remains in the vapor state.

Answer:

The bigger balloon will have a larger area and would experience a greater buoyant force exerted on it which would make it even lighter than a smaller balloon and will have higher payload capacity than a smaller one.

Answer:

They are inversely proportional with each other. [tex]R[/tex] ∝ [tex]\frac{1}{I}[/tex]

Explanation:

By the equation V=IR, assume V is constant.

Since I and R are on the same side,

if I increase, R decreases, or the vice versa.

Answer:

You could put sheet metal lining the bottom or something similar to that

Explanation:

Explanation:

Answer:

- pendulum use to determine acceleration

Explanation:

by calculating need to understand first the problem

the length is measure to be 2s

the lenght is also 2

2 obtainer on invistigation the most nearly is 8.

Answer:

molecules at higher teperature have higher speed & energy.

Explanation:

the higher they are the more it effects

The displacement needed by the airplane to return to its starting point is 12.53 km.

From the question, we are to determine the displacement

Using the diagram attached, D is displacement

Using the Pythagorean theorem,

D² = 11² + 6²

D² = 121 + 36

D² = 157

D = √157

D = 12.53 km

Hence, the displacement needed by the airplane to return to its starting point is 12.53 km.

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Find attached an illustrative diagram

Answer:

I believe it's the Supreme Court issued a decision making segregation on buses illegal