Jamal pulls a 250-N sled up a 29.0° slope at constant speed by a force of 200 N. Near the top of the hill he releases the sled. With what acceleration does the sled go down the hill?A. 7.84 m/s2B. 9.30 m/s2C. 3.32 m/s2D. 1.66 m/s2E. ​2.66 m/s2

Answer:

to the nearest defender

Answer:

I think the answer is B. amount of energy present but I'm not 100% sure

Explanation:

Answer:

the best value would be the average of all the values which is 18.1

Explanation:

by adding all the values together then dividing it by 10 we get 18.1

Answer:

1606

The main reason for using light years, however, is because the distances we deal with in space are immense. If we stick to miles or kilometers we quickly run into unwieldy numbers just measuring the distance to the nearest star: a dim red dwarf called Proxima Centauri that sits a mere 24,000,000,000,000 miles away!

Explanation:

Answer:

When several resistors are connected in series, the total resistance equals the sum of the individual resistors. In series combination, the current is same through each resistor.

1)   V=  60 volt

Total resistance R = R₁ + R₂

                              = 20 + 10

                              = 30 Ω

2) Ohms law states that,

           \(\sf I =\dfrac{V}{R}\\\\\\I = \dfrac{60}{30}\\\\I = 2 \ A\)

3) Voltage around 10 Ω resistor,

          V₂ = I R₂

             = 2 * 10

              = 20 volt

___________________________________________________

4) Total current = 1 A

5) Total voltage = 8 volt

6) Voltage around R₁ is V₁

              R₁ = 2 Ω  ; I = 1 A

              V₁ = IR₁

                   = 1 * 2

                   = 2 volt

7) Resistance 2:

        Total resistance = R

        Total voltage = V = 8 volt

        Total current = I = 1 A

                  \(\sf R = \dfrac{V}{I}\\\\\\ R = \dfrac{8}{1}\\\\\)

                  R = 8 Ω

               R₁ + R₂ = 8 Ω

                2 + R₂ = 8

                      R₂  = 8 - 2

                      R₂ = 6 Ω

8)Voltage around R₂:

                  \(\sf V_2 = IR_2\\\\V_2 = 1*6\\\\\)

                  V₂ = 6 volt

9) Total R = 8 Ω

_________________________________________________

10) Total V = 12 volt

11)  Total R = 8 + 8

                 = 16 Ω

12) Total current I,

                \(\sf I = \dfrac{V}{R}\\\\I = \dfrac{12}{16}\\\\I = 0.75 \ A\)

13) Voltage at each resistor:

           V₁ = I*R₁

               = 0.75 * 8

               = 6 volt

         V₂ = I*R₂

              = 0.75 * 8

             = 6 volt

_______________________________________________________

     14) Total R =   40 + 20

                       = 60 Ω  

15) To find V₁, first find total voltage.

           I = 2 A ;  R = 60 Ω  

           V = IR    

              = 2 * 60

               = 120 V

        V₁ + V₂  =V

        V₁ + 80 = 120

                V₁ = 120 - 80

                 V₁ = 40 volt              

Answer:

Longitudinal waves have the same direction of vibration as their direction of travel. This means that the movement of the medium is in the same direction as the motion of the wave.

One of the advantage of circuit breaker over fuses is tripped circuit breakers do not need to be replaced as fuse does power is in rapid restoration  with breakers.

A circuit breaker is an electrical device similar to electrical switches designed to protect the circuit from damges created by over current or short circuit.

Circuit breakers can be operated manually or automatically  for saving the electrical network and components.  Fuse is another saftey device to provide protection from overcurrent. It is operating automatically and it melts when over current is passed.

Even though fuses can be easily operated and less expensive, power cannot be restored after tripping the fuse whereas,  tripped circuit breakers need not be replaced and easily restore the energy as soon.

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Answer:

D

Explanation:

it's all of the above because they all use for gravity

Answer:

D

Explanation:

If two unequal forces act in opposite directions, one larger force must cancel out the smaller force,

leaving the net force to be some number in one direction.

Take for example a game of tug-of-war; there are two  OPPOSITE forces (groups of people) acting on the rope, one force is pulling with a force in the negative direction while the other force is pulling in the positive direction.

If the forces on the rope were unequal, then the stronger force (group) will pull everything in their direction.

The same will happen on two unequal forces of opposite directions acting on a wooden block. Therefore, since the resultant force will have a non-zero magnitude and direction, there will be a change in the block's motion and position.

Answer:

the unit must always be indicated

Explanation:

displacement is alway in metre (m)

Answer:

A: measurement and direction

Explanation:

on edge! hope this helps!!~ (≡^∇^≡)

Answer:

Intensity

Explanation:

Intensity is how hard you exercise. Time refers to the time of day you exercise and how long each session lasts.

Hope this helps you!

Answer: Intensity

Explanation: Intensity is how hard your exercise. We might categorize this as low, moderate, or high intensity.

The process of providing a pathway to drain excess charge into earth is called grounding. The pathway is usually a conductor such as wire that connects the electrical system to a grounding electrode or rod buried in the earth. This helps to prevent electrical shocks, fires, and equipment damage by redirecting excess voltage and current to the ground.

Grounding is typically achieved by connecting a conductor, such as a wire or metal rod, from an electrical or electronic system to the Earth's surface. Grounding helps to prevent the buildup of static electricity, protect against electrical shocks, and provide a safe discharge route for excess electrical charge.When an object is charged, it has an imbalance of electrons. This imbalance can create a potential difference between the object and the ground. If the potential difference is high enough, it can cause a spark or arc. Sparks and arcs can start fires or cause electrical shock.

Grounding provides a safe path for the excess charge to flow away from the object and into the ground. This prevents the potential difference from becoming high enough to cause a spark or arc.

Grounding is also used to improve the performance of electrical systems. For example, grounding can help to reduce noise and interference in electronic devices. It can also help to protect electrical systems from lightning strikes.

Grounding is an important safety measure that should be used in all electrical systems. It is a simple and effective way to protect people and equipment from electrical hazards.

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Answer:

Explanation:

2*H₂O

1*O₂

2 in front of water and 1 in front of oxygen

Detection methods to measure the gravitational tug of a planet on its star that is allowing us to estimate planetary mass is : (c) the astrometric and doppler methods.

Method for finding extrasolar planets and brown dwarfs from radial-velocity measurements through observation of doppler shifts in the spectrum of the planet's parent star is called doppler spectroscopy.

It is also known as the radial-velocity method or the wobble method.

Method that detects the motion of a star by making precise measurements of its position on the sky is called astrometry. This technique can be used to identify the planets around a star by measuring small changes in the position of the stars.

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If the environmental lapse rate (ELR) of the atmosphere surrounding a rising parcel of air is greater than the dry adiabatic rate (DAR) of 10°C/1000m, certain conditions and phenomena can be inferred.

When the ELR is steeper than the DAR, it indicates a condition of instability in the atmosphere.

This means that the surrounding air cools at a faster rate than a rising parcel of air would if it were undergoing adiabatic cooling.

As a result, the parcel of air becomes warmer compared to its surroundings, making it less dense and causing it to continue rising.

The steep ELR exceeding the DAR signifies an environment conducive to the development of convective processes such as thunderstorms, cumulus clouds, and other forms of unstable atmospheric phenomena.

The increased lapse rate creates an environment where the parcel of air continues to rise and can reach higher altitudes, potentially leading to the formation of significant weather events and atmospheric instability.

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Answer:

Electric Field intensity is zero.

The reason for that is:

All charges are placed at equal distances from the center of the square and have same magnitude and sign. This means they will exert equal and opposite forces on the test charge at the center. Net force will become Zero.

Answer:

 I₃ = I₀ 0.395

Explanation:

Polarized light passing through a polarizer must comply with Malus's law

         I = I₀ cos² θ

Before starting, let's analyze the angle between the polarizers, the second has the same angle with the first and the third, so it is at the midpoint

         θ₂ = 39/2 = 19.5

now let's analyze the light that passes through each polarizer, as the incident is unpolarized through the first polarizer half the intensity comes out

          I₁ = I₀ / 2

the second polarizer comes out

          I₂ = I₁ cos² 19.5

          I₂ = I₀ / 2 cos² 19.5

through the third polarized the intensity passes

          I₃ = I₂ cos² 19.5

          I₃ = (I₀ /2 cos² 19.5) cos² 19.5

          I₃ = I₀ 0.395

Answer:

magenicts   sshbsunuwi

Explanation:

Option B (Sound) is the appropriate choice.

There are surface and groundwater vibrations that cause individual eardrums to vibrate, causing the sensory organ to be felt, which is considered as a Sound.

The other given alternatives such as:

Gravity - A force that seeks to bring two items together, is gravity. Gravitational influence is a property of all objects with weight.

Magnetism - Magnetism seems to be the force that magnetically exerts whenever they approach as well as repelled each other.

Matter - Material or materials from which a thing is usually made, is a matter.

These three choices are not related to the given question. Thus the above is the right answer.

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The statement is False, there is no limit to the mass with which a star can be born.

A star is a celestial body comprised of a mass of gas, primarily hydrogen and helium, that gives off heat and light through nuclear fusion reactions in its core. Stars are the most widely recognized astronomical objects and serve as a fundamental reference point in astronomy. Stars come in a variety of sizes and colors and are classified based on their temperature, size, and luminosity.

There are many different types of stars, including main-sequence stars, red giants, white dwarfs, and neutron stars. Stars are formed when large clouds of gas and dust collapse under the force of gravity, causing the material to heat up and form a protostar. Over time, the protostar becomes hot enough to trigger nuclear fusion reactions, and it is at this point that the star becomes visible to observers on Earth. Stars eventually die out, either exploding as supernovae or fading away as white dwarfs. Starlight is the source of illumination for our night sky, and the beauty of stars has captivated humans since the dawn of time.

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This is a hypoeutectoid alloy because the mass fraction of carbon is less than the eutectoid composition of 0.8%.

What is hypoeutectoid?
The ductility of the eutectoid alloy has decreased by the a factor of three, while that of the hypoeutectoid steel has decreased by the a factor of three. The additional, fragile cementite just on pearlite grain boundaries in hyper-eutectoid alloys reduces the alloy's ductility even more. The proeutectoid cementite limits fracture to the fragile grain boundary zone and limits plastic deformation to a ferrite lamellae inside the pearlite. Such alloys must be chosen for their composition to balance such properties to the requirements of the design in order to be used in light-strong structures. Although a front fork on the a bicycle must meet certain requirements, one of those requirements is high toughness, which necessitates tailoring this same carbon content to provide the required ductility.

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The potential difference across each capacitor is 1797.45 V, 1797.45.

When the capacitors are disconnected from their batteries and their positive plates are connected to each other and negative plates are also connected to each other, they will form a series combination.

The equivalent capacitance of the series combination can be calculated as:

1/C = 1/C1 + 1/C2

where C1 and C2 are the capacitances of the two capacitors.

Plugging in the given values, we get:

1/C = 1/2.90 x 10^-6 + 1/3.50 x 10^-6

C = 1.57 x 10^-6 F

The total charge stored on the capacitors before they are connected in series is:

Q = C1V1 + C2V2

where V1 and V2 are the voltages across the two capacitors.

Plugging in the given values, we get:

Q = 2.90 x 10^-6 x 500 + 3.50 x 10^-6 x 505

Q = 2.8245 x 10^-3 C

Since the charge is conserved, the total charge on the capacitors after they are connected in series will also be Q.

The potential difference across each capacitor can be calculated using the formula:

V = Q/C

For the 2.90μF capacitor, we get:

V = Q/C = 2.8245 x 10^-3 / 1.57 x 10^-6 = 1797.45 V

For the 3.50μF capacitor, we get:

V = Q/C = 2.8245 x 10^-3 / 1.57 x 10^-6 = 1797.45 V

Therefore, the potential difference across each capacitor is 1797.45 V.

Answer: 1797.45, 1797.45.

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Answer:

After a core collapse supernova, all that remains is a dense core and hot gas called a nebula. When stars are especially large, the core collapses into a black hole. Otherwise, the core becomes an ultra-dense neutron

Explanation:

Runner A is faster than runner B and Runner B has a head start.

The velocity time graph shows us how fast that an object can be. The slope of the graph is the acceleration.

If we look at the graph as shown in the image attached to this answer, we can see that Runner A is faster than runner B and Runner B has a head start.

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Answer:

Runner A is

✔ faster

than runner B.

Runner

✔ B

has a head start.

Explanation:

The correct option is B, The magnetic flux linked of the coil will increase because the magnitude of the magnetic field is increased.

While the magnetic subject within the place is changed or the place via which the magnetic area strains passes thru the coil is changed, there is a trade in the flux linked with the coil.

The expression for the magnetic flux related with a coil in a magnetic discipline is given as:

\(\phi_{B} = BAcos \theta\)

Here, B is the magnetic field, A is the area of coil and \(\theta\) is the angle.

Magnetic flux is defined as the number of magnetic field lines that pass through a surface, perpendicularly or at an angle. The magnetic flux is directly proportional to the strength of the magnetic field and the area of the surface it passes through. It is denoted by the symbol Φ and is calculated using the formula Φ = B.A.cosθ.

Magnetic flux plays an important role in many technological applications, such as electric motors, generators, transformers, and magnetic sensors. By controlling magnetic flux, these devices can convert electrical energy into mechanical energy or vice versa. Understanding magnetic flux is also essential in the study of electromagnetism and the behavior of materials in magnetic fields.

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Complete Question:-

You hold a wire coil so that the plane of the coil is perpendicular to a magnetic field  \(\vec{B}\).

Part A

If the magnitude of \(\vec{B}\) increases while its direction remains unchanged, how will the magnetic flux through the coil change?

Check all that apply.

a. The flux is unchanged because the position of the coil with respect to  \(\vec{B}\) is unchanged.

b. The flux increases because the magnitude of \(\vec{B}\) increases.

c. The flux decreases because the magnitude of \(\vec{B}\) increases.

d. The flux is unchanged because the surface area of the coil is unchanged.

Answer:

Condensation is the change of water from its gaseous form water vapor into liquid water.

Explanation:

Answer:If you mean how much heat it can transfer as a thermal mass - in order to move heat from one place to another:

Typically the relationships are given by specific heat capacity (at different temperatures) and latent heats, plus the end-point temperatures to determine which of these conversion factors are relevant.

If time comes into it, you are looking at including shape and thermal conductivity at the minimum, so you really would need to be more specific

Explanation:

Answer: Globular clusters with stars more than 13 billion years old contain heavy elements.

Answer:

If research results can be replicated, it means they are more likely to be correct.

Answer: There are many things that have to be checked in order to know

Explanation:

For repeatability to be established, the following conditions must be in place: the same location; the same measurement procedure; the same observer; the same measuring instrument, used under the same conditions; and repetition over a short period of time.

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