0.002 written in scientific notation

A reaction yields 2.5165×10⁶ kJ. So, A) 2.300×10−6 kg mass was lost.

This question involves the use of Einstein's famous equation, E=mc², which relates energy and mass. Rearranging the equation, we get m=E/c², where m is the mass lost, E is the energy released, and c is the speed of light.

Substituting the given values, we get:

\(m = \frac{2.5165 \times 10^8 \, \text{kJ}}{c^2}\)

We can convert kJ to J by multiplying by 1000, and c is approximately 3×10⁸ m/s.

Substituting these values, we get:

\(m = \frac{2.5165 \times 10^{11} \, \text{J}}{9 \times 10^{16} \, \text{m}^2/\text{s}^2}\)

m = 2.7961×10⁻⁶ kg

Therefore, the closest option is A) 2.300×10−6 kg.

It is important to note that the equation E=mc² is only applicable for processes involving the complete conversion of mass into energy, such as nuclear reactions. In other cases, the amount of mass lost may be negligible compared to the total mass involved in the reaction.

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Answer:

b

Explanation:

According to the law of conservation of energy, the total energy will not increase/decrease without external influence.

This means that the energy will increase only if energy is being added.

A)The total energy of a system can increase only if energy enters the system.

The Law of conservation of energy states that energy can neither be created nor can be destroyed, it can only be transformed into other forms of energy. So, the energy remains the same unless it is added from any external sources.

Some examples of law of conservation of energy  that can be easily noticed in our day-to-day lives are:

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Answer:

The boat's velocity relative to Earth is 3.91 m/s.

Explanation:

Given;

speed of ferry due north, \(V_y\) = 2.5 m/s

speed of the river to the east, \(V_x\) = 3.0 m/s

The boat's velocity relative to Earth is given by;

\(V = \sqrt{V_x^2 + V_y^2} \\\\V = \sqrt{(3)^2+(2.5)^2}\\\\V = 3.91 \ m/s\)

Therefore, the boat's velocity relative to Earth is 3.91 m/s.

The boat’s velocity relative to Earth be 3.91 m/s.

Given that,

Based on the above information, the calculation is as follows:

\(= \sqrt{2.5^2 + 3.0^2} \\\\= \sqrt{6.25 + 9}\\\\= \sqrt{15.25}\)

= 3.91 m/s

Therefore we can conclude that the boat’s velocity relative to Earth be 3.91 m/s.

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Answer:

\( \boxed{\sf Distance \ travelled = 62.5 \ m} \)

Given:

Initial velocity (u) = 25 m/s

Final velocity (v) = 0 m/s (Rest)

Time taken (t) = 5 seconds

To Find:

Distance travelled by car (s)

Explanation:

From equation of motion of object moving with uniform acceleration in straight line we have:

\( \boxed{ \bold{s = (\frac{v + u}{2} )t}}\)

By substituting value of v, u & t in the equation we get:

\( \sf \implies s = ( \frac{0 + 25}{2} ) \times 5 \\ \\ \sf \implies s = \frac{25}{2} \times 5 \\ \\ \sf \implies s = 12.5 \times 5 \\ \\ \sf \implies s = 62.5 \: m\)

\( \therefore\)

Distance travelled by car (s) = 62.5 m

The distance  car travel during that time is 62.5 meter.

Acceleration is the rate at which speed and direction of velocity vary over time. A point or object going straight ahead is accelerated when it accelerates or decelerates.

Even if the speed is constant, motion on a circle accelerates because the direction is always shifting. Both effects contribute to the acceleration for all other motions.

Initial velocity (u) = 25 m/s

As the car becomes rest, final velocity (v) = 0 m/s (Rest)

Time taken (t) = 5 seconds.

The deceleration of the car: a = (initial speed - final speed)/time interval

= ( 25 m/s - 0 m/s)/5 second

= 5 m/s²

The distance  car travel during that time = ut - at²/2

= 25 × 5.0 meter - (5×5²/2) meter

= 62.5 meter.

Hence, the distance  car travel during that time is  62.5 meter.

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Answer:

t=6s

Explanation:

v=3m/s

u=12m/s

a=-1.5ms-²

t=?

v=u+at

3=12+(-1.5)t

3-12=-1.5t

t=3-12/-1.5

t=6s

I am not sure if me is correct.

Answer:

The distance from Jerusalem to Galilee is approximately 150 km depending on the route you take. You can get a bus from Jerusalem's central bus station to Tiberias, on the edge of the Sea of Galilee. The journey takes about 2-3 hours.Sep 4, 2019

The 48n force f must be applied to one end to make the system rotate with an angular acceleration of 4.0 rad/s2 about its center.

What is force ?

The pushing or pulling that modifies the velocity of a mass object is what is meant by the notion of force. An outside force has the ability to change a body's resting or moving status. It moves and has a size.

What is acceleration ?

Acceleration is the change in speed that occurs quickly. Generally speaking, but not always, acceleration denotes a shift in speed. Even while it travels in a circular motion, an object's velocity direction is changing, thus it keeps gaining speed.

Therefore, 48n force f must be applied to one end to make the system rotate with an angular acceleration of 4.0 rad/s2 about its center.

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Astronomers believe that Triton is a captured moon because its unusual orbit and characteristics suggest that it was not formed in its current location.

It orbits Neptune in a direction opposite to that of Neptune's rotation, which is highly unusual for a moon. Additionally, Triton's surface features and composition indicate that it may have originally formed in the Kuiper Belt, a region of the outer solar system beyond Neptune. Therefore, it is likely that Triton was captured by Neptune's gravity and pulled into its current orbit as a result of a gravitational interaction with another object in the early solar system.
Astronomers believe that Triton is a captured moon due to several factors. Firstly, Triton has a retrograde orbit, meaning it orbits Neptune in the opposite direction of the planet's rotation. This is unusual for a large moon and suggests that Triton was not originally formed in orbit around Neptune. Secondly, Triton's composition and features resemble those of objects found in the Kuiper Belt, a region of the solar system beyond Neptune that contains many icy bodies. These similarities support the idea that Triton was originally a Kuiper Belt object that was later captured by Neptune's gravitational pull, thus becoming a captured moon.

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Answer:

a is constant., v is increasing.

Explanation:

F = ma

F and m are both constant, so a is constant.

v = at, t is increasing, so v is increasing.

The velocity of the object will be equal to numerical multiplication of acceleration and time while  the acceleration of the body is the total applied force divided by mass of the object.

An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude. The application of force is the location at which force is applied, and the direction in which the force is applied is known as the direction of the force.

A spring balance can be used to calculate the force. Newton(N) is the SI unit of force.

For applying nonzero force, the object will come in motion.

Let, the mass of the body = m.

Force applied on it = F.

Acceleration of the body = a.

And after time t, the velocity of the object become v.

From Newton's 2nd law of motion, we can write,

Applied force = mass × acceleration.

⇒ F = ma

⇒ a = F/m.

And, final velocity will be = acceleration × time = at

Hence, the acceleration of the body is the total applied force divided by mass of the object and velocity of the object after some time will be equal to numerical multiplication of acceleration and time.

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When activated, an emergency locator transmitter (ELT) transmits on 121.5 and 406 MHz.

121.5 MHz was the international standard emergency frequency for aviation until 2009, when its use was discontinued due to its high false alarm rate. However, ELTs are still required to transmit on this frequency as a backup in case the primary frequency, 406 MHz, is not monitored by search and rescue authorities.

406 MHz is the primary frequency used for satellite-based search and rescue operations. When an ELT is activated, it sends a distress signal on this frequency, which is received by satellites in orbit around the Earth. The satellites relay the signal to a ground station, which then alerts search and rescue authorities to the distress signal and the location of the ELT.

In summary, an emergency locator transmitter (ELT) transmits on both 121.5 MHz and 406 MHz when activated, with 406 MHz being the primary frequency used for satellite-based search and rescue operations and 121.5 MHz used as a backup.

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Answer:

11 yards

Explanation:

The player ran 11 yards.

5+6=11

So 11 yards!

Hope dis helps!

-Learning with Natalia~

Answer:

  A.  The forces are the same size and in opposite directions.

Explanation:

Just as an opposite number will cancel a number: -1 +1 = 0, so an opposite force will cancel a force, with the result that the net is zero.

Its A The force are the same size and in opposite direction

The atom that is the most electronegative is fluorine (F).

Electronegativity, is the tendency for an atom of a given chemical element to attract shared electrons when forming a chemical bond.

Electronegativity increases across the groups from left to right of the periodic table and decreases down the group.

Examples of electronegative elements arranged in decreasing order;

Thus,  the atom that is the most electronegative is fluorine (F).

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The motion of the system will depend on the difference between the masses of the two astronauts.

When the two astronauts pull on the rope, the net force acting on the system consisting of the two astronauts and the rope will be equal to the difference between their forces.

Based on Newton's second law of motion;

Fnet = ma

where;

m = ma + mb

where;

Since the rope has a negligible mass, we can simplify this to:

Fnet = ma + mb

Now, we can substitute the forces exerted by the astronauts for Fnet:

Fnet = fa - fb

fa - fb = ma + mb

Since the astronauts are pulling as hard as they can, fa is equal to the maximum force that Alex can exert, and fb is equal to the maximum force that Bob can exert.

So, the motion of the system will depend on the difference between their maximum forces.

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The base of a cumulus cloud marks the altitude at which rising air cools to the dew point of temperature, leading to condensation and the formation of the cloud.

Cumulus clouds are formed as a result of warm air rising and encountering cooler air at higher altitudes, this process is known as convection. As the warm air rises, it expands and cools adiabatically, meaning that the temperature decreases due to the decrease in air pressure. The dew point is the temperature at which the air becomes saturated and can no longer hold all the water vapor present. When the rising air cools to the dew point, the water vapor starts to condense into tiny water droplets or ice crystals, forming a cloud. The altitude at which this condensation occurs and the cloud base is formed depends on the temperature and humidity profile of the atmosphere.

Typically this clouds have well-defined, sharp edges and a flat base, which is a result of the uniform dew point temperature at that altitude. The height of the cloud base can vary depending on the weather conditions and the location, but it is generally observed at around 1,000 to 3,000 meters above the ground. In summary, the base of a cumulus cloud represents the altitude where the rising air cools down to the dew point temperature, leading to condensation and the formation of the cloud, this process is influenced by atmospheric temperature and humidity profiles, as well as local weather conditions.

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For a series circuit, as lights are added, the current across each bulb decreases.  

Answer:

Sir Isaac Newton contributed significantly to the field of science over his lifetime. He invented calculus (opens in new tab) and provided a clear understanding of optics. But his most significant work had to do with forces, and specifically with the development of a universal law of gravitation and his laws of motion

Explanation:

A genius with dark secrets. Isaac Newton changed the way we understand the Universe. Revered in his own lifetime, he discovered the laws of gravity and motion and invented calculus. He helped to shape our rational world view.

Answer:

work done would be I don't know

Using the work done relation, the value of force is 25 Newton.

When a force is applied along a displacement, "work" in physics refers to the energy that is transported to or away from an object. The following situations include work: relocating a table. a door being pulled and pushed. Walking. raising a stone.

The work W that a force F traveling across a distance x exerts on an object is calculated using the formula W=Fs. If the object is moving in the opposite direction from how we expect it to, we add a minus sign.

Work done is equal to displacement times force.

50J = force × 2

f=50/2

Force = 25 Newton.

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Answer:

The moon's orbit draws the oceans to it, which triggers ocean tides. Force produces stars and planets by gathering the mass from which it exists.

Explanation:

The moon's orbit draws the oceans to it, which triggers ocean tides. Force produces stars and planets by gathering the mass from which it exists.

Answer is above

Hope this helps.

Answer:

\(46.482 cm\)

Explanation:

\(Since 1 in = 2.54cm\\\\18.3 inches =(18.3 x 2.54) cm\\ =46.482cm\)

The meteorites' kinetic energy stores are transferred to the surroundings as heat, sound and light energy.

A meteorite possesses kinetic and potential energy before it enters the Earth's atmosphere. Frictional heating happens when it enters and descends towards the Earth's surface because of collisions with atmospheric molecules, which slows its velocity. As a result, the kinetic energy drops and is changed to heat energy. As potential energy is transformed into kinetic energy, it constantly decreases. Ablation also results in mass loss.

Friction starts to work on the meteorite as it enters the earth's atmosphere. A meteorite will have kinetic energy when it enters the earth's atmosphere. The meteorite catches fire as a result of friction. At this time, the meteorite's kinetic energy will be transformed into heat, sound, and light energy.

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Answer:

4:A battery with 15 loops or wire around the nail

Explanation:

More loops equals more force

A battery with \(15\) loops or wire around the nail have the stronger force.

So, option 4 is correct.

An electromagnet is a system that contains of a magnetic encircled by a coil that conducts an electric current to ionize the core.

Wherever controllable magnetism are required, such as in devices where the magnetic flux must be adjusted, reversed, or turned on and off, an electromagnet is utilized.

A battery with \(15\) loops or wire around the nail have the stronger force.

So, option 4 is correct.

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\( \huge \mathsf \blue{Question}\)

Explain why "selectively permeable" is a good way to describe a cell membrane.

\( \huge \mathsf \blue {Answer}\)

The plasma membrane is called a selectively permeable membrane as it permits the movement of only certain molecules in and out of the cells. Not all molecules are free to diffuse. If plasma membrane ruptures or breaks down then molecules of some substances will freely move in and out of the cells.

As the plasma membrane acts as a mechanical barrier, the exchange of material from its surroundings through osmosis or diffusion in a cell won’t take place. Consequently, the cell would die due to the disappearance of the protoplasmic material. It allows hydrophobic molecules and small polar molecules diffuse through the lipid layer, but does not allow ions and large polar molecules cannot diffuse through the membrane.