The First Law of Thermodynamics is the same as ______ with heat and work taken into consideration.

A. The First Law of Robotics
B. The Law of Conservation of Energy
C. Newton's First Law of Motion
D. The Law of Conservation of Momentum​

Answer:

the answer is true.......

Answer:

1.12 N

Explanation:

Let the masses be m and M and distance be d . Force between them is .28 N .

Applying Newton's law of Gravitation

.28 = G x m M / d²

distance is halved , so distance becomes d /2

Force of attraction = G m M / ( d/2)²

= 4 Gm M / d²

= 4 x .28

= 1.12 N .

The force of attraction be if the distance between these masses is halved is equal to 1.12 N.

To calculate the gravitational force of attraction it is necessary to use the following relationship:

                                          \(F_{g} = G \frac{M \times m}{d^{2}}\)

Thus, with the value given by the question, we have that:

                                          \(0.28 N = G \frac{M \times m}{d^{2}}\)

When the distance is divided in half we will have:

                                         \(F_{g} = G \frac{M \times m}{(d/2)^{2}}\)

                                        \(F_{g} = G \frac{M \times m}{d^{2}/4}\)

                                        \(F_{g} = 4\times G \frac{M \times m}{d^{2}}\)

                                       \(F_{g} = 4 \times 0.28 = 1.12 N\)

So, the force of attraction be if the distance between these masses is halved is equal to 1.12 N.

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The graph below shows the motion of a person leaving theater, line segment C represent : The person is moving away from the theater.

In physics, motion is a change with time of the position or orientation of a body. Motion along a line or a curve is called as translation whereas motion that changes orientation of a body is called rotation.

Motion is a change in position of an object over the  time and is described in terms of displacement, distance, velocity, acceleration, time and speed.

Change in position of a body with time when compared with another body is known as  motion.

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Answer:

is this a company name.? java is a computer software right..

Answer:

Option D. 9.8 N

Explanation:

From the question given above, the following data were:

Mass of object = 1 kg

Normal force (R) =.?

The normal force experienced by the object can be obtained by using the following formula:

Normal force (R) = mass (m) × acceleration due to gravity (g)

R = mg

Mass of object = 1 kg

Acceleration due to gravity (g) = 9.8 m/s²

Normal force (R) =.?

R = mg

R = 1 × 9.8

R = 9.8 N

Thus, the normal force experienced by the object is 9.8 N

Answer:

B because you go to the left 2 then up 3 to get (2,3)

Answer:

D.(3,2)

Explanation:

Because the point "A" is 2 places right on the x axis and 3 places up on the y axis

Answer:

a) DOWN direction,  b)  directed INTO THE SCREEN, c)    F = 0

Explanation:

The direction of the force is

for electric force

           F = q E

where we assume a positive test charge, for which the force has the direction of the electric field.

For a magnetic field

in this case the direction of the force is given by the right hand rule.

For a positive test charge, the thumb points in the direction of velocity, the other fingers extended in the direction of the magnetic field, and the palm gives the direction of force for a positive charge.

           F = q v x B

Let us apply these considerations to our case.

a) negative charge moving to the left

in a magnetic field points away from the screen

In this case the thumb goes to the left, the fingers extended outwards and the palm points upwards, but since the charge is negative the force has a DOWN direction.

b) negative charge moves to the left

in electric field it points off the screen.

The outside is in the direction of the electric field and since the charge is negative, the force is directed INTO THE SCREEN

c) positive charge moves down

in magnetic field points up

in this case the velocity and the field have the same direction so the vector product of them is zero

       F = q v  B sin 0

       F = 0

Answer:

The two most common types of orbit are "geostationary" and "polar."

Answer:2 ways in which a weather satellite can orbit the earth

Explanation:

Initially rolling inside a horizontal circle five meters above the ground at a speed of two meters per second, the ball breaks the string as it approaches true North. Though it is falling, it is still heading in the direction

The lower string, however, is the one that snaps if it is forcefully yanked. The prevailing theory holds that the mass's inertia prevents it from moving and, as a result, from pulling on the top string.

If both strings are equally strong, the top string will break sooner. However, a change in tension from the lower string takes a moment to transfer because of the inertia of a hanging object.

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Protons, neutrons, and electrons are the three main subatomic particles that make up atoms.

An oxygen atom has 8 protons, 8 electrons, and its number of neutrons may vary depending on the isotope of oxygen. The more frequently encountered isotope of oxygen is oxygen-16, with 8 neutrons.

The element with 13 protons is aluminum (Al). To find the mass number, we add the number of protons and neutrons in the nucleus. Therefore, the mass number of this aluminum isotope would be 13 + 14 = 27.

If an atom has 7 electrons, it must be nitrogen (N), which has an atomic number of 7.

Number of neutrons = Mass number - Atomic number

Thus, we obtain the number of neutrons by the equation: 14 - 7 = 7

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Answer:

out of the screen

Explanation:

because charge +Q is already moving upward

Answer:

Hertzsprung-Russell Diagram

The Hertzsprung-Russell diagram (HR diagram) is one of the most important tools in the study of stellar evolution. Developed independently in the early 1900s by Ejnar Hertzsprung and Henry Norris Russell, it plots the temperature of stars against their luminosity (the theoretical HR diagram), or the colour of stars (or spectral type) against their absolute magnitude (the observational HR diagram, also known as a colour-magnitude diagram).

Depending on its initial mass, every star goes through specific evolutionary stages dictated by its internal structure and how it produces energy. Each of these stages corresponds to a change in the temperature and luminosity of the star, which can be seen to move to different regions on the HR diagram as it evolves. This reveals the true power of the HR diagram – astronomers can know a star’s internal structure and evolutionary stage simply by determining its position in the diagram.

Explanation:

Hence the answer is C : Super Giants

Answer:

A) N = (M + mf + md) g

B) d = md L / (2 mf)

Explanation:

Draw a free body diagram.  There are four forces acting on the board.

Weight force M g pulling down at the center of the board.

Normal force N pushing up at the center of the board.

Weight force mf g pulling down a distance d from the center.

Weight force md g pulling down at the end of the board.

Sum of forces in the y direction:

∑F = ma

N − M g − mf g − md g = 0

N = (M + mf + md) g

Sum of moments about the center of the board:

∑τ = Iα

md (L/2) − mf d = 0

d = md L / (2 mf)

The magnitude of the upward force n exerted by the support on the board will be the same with the magnitude of the weight of the seesaw. Which is

W = 9.8M Newton

The father should sit at L/4 at the other end in order to balance the system at rest

Since the seesaw is of a uniform board, the center of gravity will act at the center. If it is of length L, the support called the fulcrum will be positioned at L/2.

If the daughter is a distance L/2 from the center, Then, she must be positioned at L/4 from the one edge of the board.

A. The magnitude of the upward force n exerted by the support on the board will be the same with the magnitude of the weight of the seesaw. Which is

W = mg

W = 9.8M Newton

The weight of both the father and the daughter will act downward. so, they will not be included.

The father should sit at L/4 at the other end in order to balance the system at rest

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Answer:

is a guideline to help an individual write and achieve well-specified goals.

Explanation:

An action plan  is a guideline to help an individual write and achieve well-specified goals.

Answer:

yes, the guideline is to help an individual write and achieve well-specified goals.

Explanation:

Answer:

The appropriate solution is "0.597 mm".

Explanation:

Given that:

Wavelength,

\(\lambda = 519 \ nm\)

or,

  \(=519\times 10^{-9}\)

Distance,

\(D=4.6 \ m\)

Separated by,

\(\beta = 4.0 \ mm\)

or,

   \(=4.0\times 10^{-3}\)

As we know,

⇒ \(\beta=\frac{\lambda D}{d}\)

or,

The separation of two slits will be:

⇒ \(d=\frac{\lambda D}{\beta}\)

By putting the values, we get

       \(=\frac{(519\times 10^{-9})(4.6)}{4.0\times 10^{-3}}\)

       \(=5.97\times 10^{-4}\)

or,

       \(=0.597 \ mm\)

Mark's work decreases when he climbs the same flight of stairs again in the same amount of time without the cello.

The correct answer is option D.

The amount of work Mark does depends on the weight of the cello, as well as the distance he climbs and the time it takes. Work is calculated using the formula :

Work = Force × Distance.
In the given scenario, Mark is carrying a full-sized cello while climbing the stairs. The weight of the cello adds to the force he exerts. So, the total force Mark exerts is the weight of the cello plus his own weight (375 N).

When Mark climbs the stairs with the cello, he is doing work against the force of gravity.

The work done is equal to the force exerted multiplied by the distance climbed (375 N + weight of cello) × 4 m.

Now, if Mark were to climb the same flight of stairs again in the same amount of time (3 seconds), but this time without the cello, the amount of work he does would decrease. This is because without the cello, the force exerted would only be Mark's weight (375 N), which is less than the total force exerted with the cello.

Therefore, mark's work decreases.

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Explanation:

Current can be defined as the rate of flow of electric charge along a conductor.

The total resistance of the circuit is 49 Ω. The current strength in the circuit, when connected to a voltage source of 56 V, is approximately 1.14 A.

To calculate the total resistance of the circuit, we need to determine the equivalent resistance of the resistors connected in a series.

Given:

R1 = 4 Ω

R2 = 30 Ω

R3 = 10 Ω

R4 = 5 Ω

Calculate the equivalent resistance (RT) of R1 and R2, as they are connected in series:

RT1-2 = R1 + R2

RT1-2 = 4 Ω + 30 Ω

RT1-2 = 34 Ω

Calculate the equivalent resistance (RTotal) of RT1-2 and R3, as they are connected in parallel:

1/RTotal = 1/RT1-2 + 1/R3

1/RTotal = 1/34 Ω + 1/10 Ω

1/RTotal = (10 + 34) / (34 * 10) Ω

1/RTotal = 44 / 340 Ω

1/RTotal ≈ 0.1294 Ω

RTotal ≈ 1 / 0.1294 Ω

RTotal ≈ 7.74 Ω

Calculate the equivalent resistance (RTotalCircuit) of RTotal and R4, as they are connected in series:

RTotalCircuit = RTotal + R4

RTotalCircuit = 7.74 Ω + 5 Ω

RTotalCircuit ≈ 12.74 Ω

Therefore, the total resistance of the circuit is approximately 12.74 Ω.

To determine the current strength (I) when connected to a voltage source of 56 V, we can use Ohm's Law:

I = V / RTotalCircuit

I = 56 V / 12.74 Ω

I ≈ 4.39 A

Therefore, the current strength in the circuit, when connected to a voltage source of 56 V, is approximately 4.39 A (or 1.14 A, considering significant figures).

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Answer:

34 yards or 34 yard line

Explanation:

8 × 3 = 24

24 + 10 = 34

The weight watcher must climb : 3.45 km to work off the equivalent of a large piece of chocolate cake rated at 670 calories.

First step : convert the energy to joules

670 calories to Joules

E = 670 * 10³ * 4.184

  = 2803280 J

Next step : Equate energy to gravitational potential energy

2803280 J = mgh

2803280 = 82.9 * 9.8 * h

Therefore :

h = 2803280 / ( 812.42 )

  = 3451 m  = 3.45 Km

Hence we can conclude that The weight watcher must climb : 3.45 km

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Answer: Yes the energy of a baseball can break a window, but the force of what is launching the ball does matter too. if it is lightly thrown, then the window will appear a little shaken, but if thrown harder the window will break.

Explanation:

Through the annealing process of hardening tempered glass, the force required to break the window is much more than breaking a normal pane. Depending on the manufacturer, the force required to break tempered glass ranges from 20,000 to 24,000 PSI (or pounds per square inch).

Answer:

A. 450 N

B. 3240 J

C. 0.77 KW

Explanation:

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

Height of one step = 20 cm

Number of steps = 36

Mass of runner = 45 kg

Time taken = 4.2 s

Next, we shall convert 20 cm to metre (m). This can be obtained as follow:

100 cm = 1 m

Therefore,

20 cm = 20 cm × 1 m /100 cm

20 cm = 0.2 m

Next, we shall determine the total height. This can be obtained as follow:

Height of one step = 0.2 m

Number of steps = 36

Total height =?

Total height = 36 × 0.2

Total height = 7.2 m

A. Determination of the runner's weight.

Mass of runner (m) = 45 kg

Acceleration due to gravity (g) = 10 m/s²

Weight (W) =?

W = m × g

W = 45 × 10

W = 450 N

B. Determination of the increase in the potential energy.

At the ground level, the potential energy (PE₁) is 0 J.

Next, we shall determine the potential energy at 7.2 m. This can be obtained as follow:

Mass of runner (m) = 45 kg

Acceleration due to gravity (g) = 10 m/s²

Total height (h) = 7.2 m

Potential energy at height 7.2 m (PE₂) = ?

PE₂ = mgh

PE₂ = 45 × 10 × 7.2

PE₂ = 3240 J

Final, we shall determine the increase in potential energy. This can be obtained as follow:

Potential energy at ground (PE₁) = 0 J

Potential energy at height 7.2 m (PE₂) = 3240 J

Increase in potential energy =?

Increase in potential energy = PE₂ – PE₁

Increase in potential energy = 3240 – 0

Increase in potential energy = 3240 J

C. Determination of the power.

Energy (E) = 3240 J

Time (t) = 4.2 s

Power (P) =?

P = E/t

P = 3240 / 4.2

P = 771.43 W

Finally, we shall convert 771.43 W to kilowatt (KW). This can be obtained as follow:

1000 W = 1 KW

Therefore,

771.43 W = 771.43 W × 1 KW / 1000 W

771.43 W = 0.77 KW

Therefore, her power is 0.77 KW

Answer:

I believe the answer is specific gravity

Explanation:Hope this helps :)

The earthquake would occur 13 minutes before 10:05 a.m. which will be at 9.52 am.

The p-waves travel with a constant velocity of 7 km/s

The time can be calculated by using the formula

t = d / v

where

T1 =  10:05 a.m

d is the distance they take to travel from the epicenter

v is the speed of the p-waves

On average, the speed of p-waves is

v = 7 km/s

d = 5600 km (given)

Substituting the values in the formula;

t = d / v

t = 5600 ÷ 7

t = 800 seconds

Converting into minutes,

t = 800 ÷ 60

t = 13.3

≈ 13 mins

T1 -  13 mins = T2

10:05 - 13 mins = 9.52 am

It means the earthquake occurred prior 13 minutes, that is at 9.52 am.

Therefore, the earthquake occurred at 9.52 am.

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The initial volume of the liquid is 31.4 cm³. The volume coefficient of thermal expansion of the liquid is 0.002 per degree Celsius. A temperature increase of 109.5°C is needed for the liquid to rise to a height of 49cm.

The initial volume of the liquid can be found using the formula for the volume of a cylinder:

V = πr²h

where r is the radius (half the diameter), h is the height, and π is approximately 3.14. Plugging in the given values, we get:

V = π(0.5 cm)²(40 cm)

V = 31.4 cm³

The volume coefficient of thermal expansion (β) is defined as the fractional change in volume per degree Celsius change in temperature. It can be calculated using the formula:

β = ΔV/(VΔT)

where ΔV is the change in volume, V is the initial volume, and ΔT is the change in temperature. We can rearrange this formula to solve for ΔV:

ΔV = βVΔT

We know that ΔT = -10°C (a decrease of 10°C) and that the height decreased from 40cm to 37cm, or by 3cm. The change in volume can be found using the formula for the volume of a cylinder again, with the new height of 37cm:

ΔV = π(0.5 cm)²(40 cm - 37 cm)

ΔV = 0.59 cm³

Plugging in all the values, we get:

0.59 cm³ = β(31.4 cm³)(-10°C)

β = 0.002

To find the change in temperature needed for the liquid to rise to a height of 49cm, we can use the same formula as before, but solve for ΔT:

ΔT = ΔV/(βV)

We know that ΔV is the difference between the initial volume and the volume at the new height, which is:

ΔV = π(0.5 cm)²(49 cm - 40 cm)

ΔV = 6.86 cm³

Plugging in all the values, we get:

ΔT = 6.86 cm³/(0.002)(31.4 cm³)

ΔT = 109.5°C

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The final volume of the glass bottle when heated to 30°C is 10.0018 cm³.

The final volume of the glass bottle is calculated by applying the formula for volume expansivity as follows;

ΔV = V₀αΔT

Where

The change in temperature is calculated as;

ΔT = 30°C - 10°C = 20°C

The change in volume of the bottle;

ΔV = 10 cm³ x (9 x 10⁻⁶) x 20°C

ΔV =  1.8 x 10⁻³ cm³

The final volume of the bottle is calculated as follows;

V₂ = V₁ + ΔV

V₂ = 10 cm³ +  1.8 x 10⁻³ cm³

V₂ = 10.0018 cm³

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We can see here that the diagram that reveals the absorption of photons and production of electrons (photoelectric effect) used in solar PV systems is seen below.

A photon is a fundamental particle or quantum of light.

It is the smallest indivisible unit of electromagnetic radiation, which also includes radio waves, microwaves, X-rays, visible light, ultraviolet light, and infrared radiation. In scientific calculations, photons are represented by the symbol "c" and move at the speed of light in a vacuum while carrying energy.

Wave-particle duality is the idea that photons are both particles and have wave-like characteristics. This means that they can exhibit wave-like properties like interference and diffraction as well as discrete particle behavior, each with a distinct energy and momentum.

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