True or false? The difference between the state of matter (solid, liquid & gas) is their energy & bond

Answer:

When two objects interact, each one exerts a force on the other that can cause energy to be transferred to or from the object. For example, when energy is transferred to an Earth-object system as an object is raised, the gravitational field energy of the system increases. This energy is released as the object falls; the mechanism of this release is the gravitational force. Likewise, two magnetic and electrically charged objects interacting at a distance exert forces on each other that can transfer energy between the interacting objects.

Explanation:

Even when an object is sitting still, it has energy stored inside that can be turned into kinetic energy (motion). ... A force is a push or pull that causes an object to move, change direction, change speed, or stop. Without a force, an object that is moving will continue to move and an object at rest will remain at rest.

Energy can be transmitted to or from an object when two things interact because of the forces that each one of the items applies to the other.

For instance, the gravitational field energy of a system including the Earth and an object grows as energy is transmitted to the system when the object is raised.

As the object falls, this energy is released, and the gravitational force provides the mechanism for this release. Similar to this, when two electrically and magnetically charged objects contact at a distance, they exert forces on one another that can transmit energy.

Even when an item is at rest, it still contains energy that can be converted to kinetic energy (motion). A push or pull that moves, changes direction, or otherwise affects an object is called a force.

Therefore, Energy can be transmitted to or from an object when two things interact because of the forces that each one of the items applies to the other.

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Answer:

Therefore the planet is Saturn .

Explanation:

Let acceleration due to gravity be g .

weight on the planet = 726 g

Frictional force = μs mg

= .65 x 726 x g

This force is equal to 4930 N .

.65 x 726 x g = 4930 N .

g = 10.44 .

Therefore the planet is Saturn .

Speed of projection of the projectile  is  20 m/s.

The maximum height reached by the projectile is 10 m.

When a particle is hurled obliquely near the surface of the earth, it travels along a curved path while accelerating continuously in the direction of the planet's center . Such a particle's route is referred to as a projectile.

Acceleration due to gravity = 10 m/s²

maximum horizontal range = 40 m.

Hence, Speed of projection of the projectile = √(40×10) m/s = 20 m/s.

The maximum height reached by the projectile = 20²/(4×10) m = 10 m.

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Answer:

Below

Explanation:

Going forward and stops .....the backpack wants to keep going forward due to its inertia.

Answer:

The earliest goalie masks used were made from Fiberglass.

Explanation:

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If you pull yourself to the center of the merry-go-round,  the rotation of the merry go round will decrease.

This is the radial acceleration experienced by a person moving in a circular path as the merry-go-round rotates about its mean position.

a = v²/r

where;

From the formula given above, as the radius of the merry go round increases, the centripetal acceleration of the merry go round decreases.

v = ωr

where;

Thus, when the radius of the circular path decreases, the speed of the merry go round will decrease as well.

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Answer:

4 m/s²

Explanation:

F=ma

12=3×a

a=12/3

a=4 m/s²

The required maximum value of rolling resistance is calculated to be 129.32 lbs/ton.

We know that the scraper is moving at a uniform speed, which means that the net force acting on it is zero. Therefore,

Fnet = Ftension - Frolling = 0

Solving for Frolling,

Frolling = Ftension = 9,000 lbs

To express the rolling resistance in lbs per ton, we need to convert the weight of the scraper to tons,

One ton is equal to 2000 pounds, so the weight of the scraper is:

W = mg = (63100 kg)(9.8 m/s²) = 618,780 N

Converting to pounds and tons,

W = 618,780 N × 0.2248 lbs/N = 139,174.6 lbs

1 ton = 2000 lbs, so the weight of the scraper is,

W = 139,174.6 lbs/2000 lbs/ton = 69.59 tons

Now we can calculate the rolling resistance in lbs per ton,

Rolling resistance = Frolling/W = 9,000 lbs/69.59 tons = 129.32 lbs/ton

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Mars is believed to have significantly less metal in its core than Earth due to its smaller size and differences in planetary formation processes.

Mars and Earth formed around the same time, approximately 4.6 billion years ago, through the process of accretion. However, their formation processes differed in some aspects, resulting in variations in their compositions. Mars is smaller than Earth, with a diameter of about 6,779 kilometers, compared to Earth's 12,742 kilometers. Due to its smaller size, Mars has a lower mass and gravity, which could have led to a lower concentration of heavy metals sinking into its core during formation.

Additionally, the abundance of metal-rich meteorites and other materials available during the formation of the two planets may have been different. Earth may have received more metal-rich materials due to its larger size and stronger gravitational pull, whereas Mars, being farther from the Sun, may have had less access to these building blocks.

Another factor is the differentiation process that both planets underwent. Earth's core is believed to have separated more efficiently from its mantle, leading to a higher concentration of heavy metals in its core. Mars, on the other hand, may have experienced a less efficient differentiation process, resulting in a less metal-rich core.

In summary, Mars's smaller size, differences in planetary formation, and less efficient differentiation process contribute to its core containing significantly less metal than Earth's core.

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At an amusement park, a swimmer uses a water slide to enter the main pool. Part A If the swimmer starts at rest, slides without friction, and descends through a vertical height of 2.81 m. The swimmer's speed at the bottom of the slide is 6.1 m/s.

The swimmer starts at rest and slides without friction, so their speed at the bottom of the slide will be determined by the gravitational potential energy they gain from descending 2.81 m. According to the equation for gravitational potential energy,  

\(mgh = 1/2 mv^{2} ,\)

where m is the mass of the swimmer,

g is the acceleration due to gravity\((9.8 m/s^{2} ),\)

h is the vertical height, and

v is the speed at the bottom of the slide, the speed of the swimmer at the bottom of the slide can be calculated.

Using the equation, we can calculate the speed of the swimmer at the bottom of the slide:

\(v = (2mgh)1/2  

= (2(m)(9.8 m/s^{2} )(2.81 m))1/2  

= 6.1 m/s\)

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The volume of the material would change by 0.00012%.

Material is anything that has physical existence and can be perceived by one or more of the five senses. It is anything that has mass and occupies space. Examples of materials include wood, metal, plastic, paper, fabric, glass, stone, water, air, and living organisms.

The coefficient of volume thermal expansion (β) is related to the coefficient of linear thermal expansion (α) by the equation β = 3α. Therefore, the value of β for the given material would be 3(4 × 10-5K-1) = 0.00012K-1.
This means that for every degree Kelvin of temperature change, the volume of the material would change by 0.00012%.

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Answer:

A simple cell can be made by connecting two different metals in contact with an electrolyte

From the given circuit the current in resistor R is 2A, the resistance R is 5ohm,  the unknown emf E is 42V and if the circuit is broken at point x, the current in resistor R is zero.

Given the diagram, the voltage passing through resistor R (V) =  28V

The current passing through resistor R is = I1

The resistance of second resistor (R2) =6 ohm.

The current passing through R2 = 4A

The resistance of third resistor (R3) = 3 ohm

The current passing through R3 = 6A

The emf at resistor R2 = e

Here we can see that current passing through R3 is split into I1 and I2 such that I1 + I2 = I3. Then, I1 + 4 = 6A

I1 = 2A

(a) The current in resistor R = 2A

(b) From ohms law we know that V = IR. Then V1 - I3R3 -I1R1 = 0

28 - (3 x 6) - (2 x R) = 0. then R = 5ohm.

The resistance R = 5 ohm

(c) Similarly, e - (3 x 6) - ( 6 x 4) = 0

Then e = 42V

The unknown emf = 42V

(d) When the circuit is broken at x, that branch is eliminated from the circuit. It will stop carrying current. The distribution of currents and voltages in the other portions of the circuit will vary as a result.

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The strongest radio-wavelength emitter in the solar system is Jupiter.

Jupiter emits intense bursts of radio waves, known as decametric radio emission, that are generated by high-energy electrons moving through the planet's strong magnetic field.

The radio waves emitted by Jupiter have a wavelength of several meters to tens of meters and are mostly observed at frequencies between 10 and 40 MHz. These emissions were first detected in the 1950s by radio astronomers and have since been studied extensively.

Jupiter's radio emissions are thought to be generated by a process known as cyclotron maser instability, in which electrons in the planet's magnetosphere are accelerated to high energies and emit intense bursts of radiation as they interact with the planet's magnetic field.

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Answer:

A) The person's body temperature T_final after equilibrium is attained = 36.85°C

B) The change in the person's temperature after equilibrium is attained = 0.15°C

A high-quality medical thermometer can measure temperature changes as small as 0.1°C, hence, YES, it would detect the minute drop by 0.15°C too.

Explanation:

If we assume that the soft drink has the same density as water (since it is stated in the question that it is mostly water).

Density of water = 1 g/mL = 1 kg/L

Ignoring any heating by the person's metabolism,

A) So, heat lost by the human body = heat gained by the soft drink as it attains thermal equilibrium with the human body

Let the final temperature of the human body + soft drink set up be T

Heat lost by the human body = mCΔT

m = mass of the human body = 70.0 kg

C = Specific heat capacity of the human body = 3480 J/kg.K

ΔT = Temperature change of the human body = 37 - (Final temperature) = 37 - T

Heat lost by the body = 70 × 3480 × (37 - T)

= (9,013,200 - 243,600T) J

Heat gained by soft drink = mCΔT

m = mass of the soft drink = density × volume = 1 × 0.355 = 0.355 kg

C = specific heat capacity of the soft drink = specific heat capacity of the soft drink = 4182 J/kg.K

ΔT = (final temperature) - 12 = (T - 12)

Heat gained by the soft drink = 0.355 × 4182 × (T - 12) = (1,484.61T - 17,815.32) J

heat lost by the human body = heat gained by the soft drink as it attains thermal equilibrium with the human body

(9,013,200 - 243,600T) = (1,484.61T - 17,815.32)

9,013,200 + 17,815.32 = 1,484.61T + 243,600T

9,031,015.32 = 245,084.61T

T = (9,031,015.32/245,084.61)

= 36.8485614825 = 36.85°C

B) The change in the person's temperature = 37 - 36.85 = 0.15°C

A high-quality medical thermometer can measure temperature changes as small as 0.1°C, hence it would detect the minute drop by 0.15°C too.

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The equilibrium temperature is required and to find whether the temperature change can be measured by a thermometer is required.

The temperature is 310 K.

Yes, the thermometer can measure the temperature difference.

\(m_1\) = Mass of person = 70 kg

\(c_1\) = Specific heat of person = 3480 J/kg K

T = Equilibrium temperature

\(T_1\) = Temperature of person = \(37\ ^{\circ}\text{C}+273.15 =310.15\ \text{K}\)

\(1\ \text{L}=1\ \text{kg}\) of water

\(m_2\) = Mass of water = \(0.355\ \text{kg}\)

\(c_2\) = Specific heat of soft drink mostly water = \(4186\ \text{J/kg K}\)

\(T_2\) = Temperature of soft drink = \(12\ ^{\circ}\text{C}=285.15\ \text{K}\)

The heat equation is

\(m_1c_1(T-T_1)=m_2c_2(T_2-T)\\\Rightarrow m_1c_1T-m_1c_1T_1=m_2c_2T_2-m_2c_2T\\\Rightarrow T=\dfrac{m_2c_2T_2+m_1c_1T_1}{m_1c_1+m_2c_2}\\\Rightarrow T=\dfrac{0.355\times 4186\times 285.15+70\times 3480\times 310.15}{70\times 3480+0.355\times 4186}\\\Rightarrow T=310\ \text{K}\)

The temperature difference is \(T_1-T=310.15-310=0.15\ \text{K}=0.15\ ^{\circ}\text{C}\)

Yes, the thermometer can measure the temperature difference.

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a) To find the speed of the signal in water, we can use the equation:

Speed = Wavelength x Frequency

Where Wavelength is given as 1.5 mm and Frequency is given as 1 x 10^6 Hz.

Speed = 1.5 x 10^-3 m x 10^6 Hz = 1.5 x 10^3 m/s

So the speed of the signal in water is 1.5 x 10^3 m/s

b) To find the period in water, we can use the equation:

Period = 1 / Frequency

Where Frequency is given as 1 x 10^6 Hz

Period = 1 / (1 x 10^6) s = 1 x 10^-6 s = 1 microsecond

So the period of the signal in water is 1 microsecond

c) The speed of sound in air is approximately 343 m/s. Since the frequency of the signal remains constant and the speed of sound in air is different than the speed of sound in water, the wavelength of the signal will also be different. However, since the period is inversely proportional to the frequency and is independent of the medium, the period of the signal in air will be the same as in water, which is 1 microsecond.

No, the 2px and 2py orbitals are not eigenfunctions of the z-component of the angular momentum operator. This is because the z-component of the angular momentum operator.

No, the 2px and 2py orbitals are not eigenfunctions of the z-component of the angular momentum operator. This is because the z-component of the angular momentum operator, Lz, is given by:

Lz = -iħ(∂/∂θ)

Where ħ is the reduced Planck's constant, and θ is the polar angle. The 2px and 2py orbitals are eigenfunctions of the x-component and y-component of the angular momentum operator, respectively.

To find the eigenvalues of the z-component of the angular momentum operator for the 2px and 2py orbitals, we need to apply the Lz operator to each of them. Let's consider the 2px orbital first:

Lz(2px) = -iħ(∂/∂θ)(2px)

= -iħ(∂/∂θ)[(1/√2)(y/a0)(z/2a0 - x/2a0)]

= iħ(1/√2)(z/2a0 - x/2a0)(1/a0)

= iħ(1/√2)(-sinθ)(1/a0)

The eigenvalue of Lz for the 2px orbital is then:

Lz(2px) = iħ(1/√2)(-sinθ)(1/a0)

Similarly, for the 2py orbital, we have:

Lz(2py) = iħ(1/√2)(cosθ)(1/a0)

Therefore, the 2px and 2py orbitals are not eigenfunctions of the z-component of the angular momentum operator, and their eigenvalues for this operator are given by iħ(1/√2)(-sinθ)(1/a0) and iħ(1/√2)(cosθ)(1/a0), respectively.

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Answer:

Voltage V = 117.65 volts

the voltage across the light bulb's filament is 117.65 V

Explanation:

The power of a light bulb can be expressed with respect to voltage and current flow.

Power = voltage × current

P = VI

Making Voltage V the subject of formula;

V = P/I

Given;

Power P = 4.0W

Current I = 0.034A

Substituting the given values;

V = 4/0.034

V = 117.65 volts

Answer:

K.E =1÷2M×V^2

= 1÷2×0.05×(400)^2

= 4000

Explanation:

A meal containing 100 grams of carbohydrate, 20 grams of protein, and 10 grams of fat would contain approximately 570 calories or 0.57 kilocalories.

1 gram of carbohydrate contains 4 calories, and therefore 100 grams of carbohydrate contains: 100 × 4 = 400 calories.

1 gram of protein contains 4 calories, and therefore 20 grams of protein contains: 20 × 4 = 80 calories.

1 gram of fat supplies the body with 9 calories, and therefore 10 grams of fat contains: 10 ×9 = 90 calories.

Adding the total caloric values from carbohydrate, protein, and fat would give us a total of: 400 + 80 + 90 = 570 calories. Since 1 kilocalories (kcal) is a unit of energy equal to 1,000 calories, therefore 570 calories are equal to: 570 ÷ 1000 = 0.57 kilocalories.

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Answer:

D

Explanation:

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If the boat's speed is s, and the river's speed is r, and the boat is traveling east (0 degrees),

(0,r) + (s cos297,s sin297) = (6,0)

now just solve for r and s.

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Answer:

Asteroid y

Explanation:

The upthrust force on the metal block is 40gf when a metal block weighs 500gf in air and 460gf when completely immersed in water.

Given:  Weight of a metal block in air=500gf

Weight of a metal block when immersed in water=460gf

When a body is immersed in a fluid, it experiences an upward force which is called upthrust.

Loss in weight of the metal block = upthrust force

Loss in weight of the metal block = weight of the metal block in the air- the weight of the metal block when immersed in water

So, loss in weight of the metal block= 500gf - 460gf = 40gf

Therefore, the upthrust force on the metal block is 40gf.

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The change in gravitational potential energy of the spacecraft as it moves from point B to point A is 8.3x10^9 J.

The change in gravitational potential energy of the spacecraft as it moves from point B to point A can be calculated using the formula:

                    \(ΔPE = -GMm(1/rA - 1/rB)\) , where

ΔPE is the change in gravitational potential energy,

G is the gravitational constant,

M is the mass of the planet,

m is the mass of the spacecraft,

rA is the distance from the planet's center at point A, and

rB is the distance from the planet's center at point B.

Using the given values, we have:

\(ΔPE = -(6.67x10^-11 Nm^2/kg^2)(1.50x10^24 kg)(650 kg)(1/5.00x10^7 m - 1/0)\)\(ΔPE = -(6.67x10^-11 Nm^2/kg^2)(1.50x10^24 kg)(650 kg)(1/5.00x10^7 m - 1/0)\)

Simplifying the expression, we get:

\(ΔPE = -8.3x10^9 J\)

Therefore, the change in gravitational potential energy of the spacecraft as it moves from point B to point A is \(8.3x10^9\)J, which is a negative value because the spacecraft is moving closer to the planet and its gravitational potential energy is decreasing.

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Answer:

placing an object between two free ends of a wire in a circuit. the circuit must have a bulb, wires, crocodile clips and a switch (optional) .

Explanation:

get a material between the clips . if the bulb lights up, the object is a conductor and is it doesn't its an insulator.

Answer is:

E= V/d = 20.0Volts/ 0.020m = 1000 N/C

Answer:

33 hours

Explanation:

7.5 + 6.5 = 13 + 1

14 + 10 = 24

9= 6+3

24 + 6 = 30

30+3= hours

Newtons third law of motion

Explanation:

According to Newtons third law of motion: Every action has an equal and opposite reaction.

Answer:

69.42 m

Explanation:

From the question given above, the following data were obtained:

Initial velocity (vᵢ ) = 4.9 m/s

Acceleration (a) = 4.2 m/s²

Time (t) = 4.7 s

Displacement (Δx) =?

Thus, we can obtain the displacement by using the following formula:

Δx = vᵢt + ½at²

Δx = (4.9 × 4.7) + (½ × 4.2 × 4.7²)

Δx = 23.03 + (2.1 × 22.09)

Δx = 23.03 + 46.389

Δx = 69.419 ≈ 69.42 m

Thus, the distance travelled is 69.42 m