The electric potential at a point in space is -890 V. If a 0.0285 C charge is placed there, what will its potential energy U be? Include the sign, + or - (Unit = J)​

Answer:

a concave lens forms a smaller, real image. { a p e x :)) }

Explanation:

hey, friend! this is the answer, but make sure that, next time, you include the diagram to make it easier for us to help you, okay?

A concave lens forming a larger real or virtual image and Concave mirrors form both real and virtual images. therefore all statements are correct. Therefore these can be interpreted by using Ray diagram.

A ray diagram is a diagram that shows path taken by light in order to see a point on the image of an object. Ray diagram uses lines with arrows to show reflected and incident ray.

A concave lens is a lens that diverges a straight light beam from the source to a diminished, upright, virtual image. It can form both real and virtual images. concave lens has curve on both side. The lens having only one side plane and other is curved inside, the les is called as planoconcave lens.

Concave mirror can form both virtual and real image that depends on the distance between the mirror and object. We get virtual and magnified image When the object is placed very close to the mirror. when distance between the object and mirror is increased, image gets diminished and real.

Both concave lens and mirror form both real and virtual images that's depend on the distance.

Hence all statements are correct.

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Answer:

Explanation:

A. Encouragement

The resistance is directly proportional to the temperature. Then resistance of platinum at 100°C IS 2.5 Ω. Then, the when the resistance becomes 9.61 ohms is 384°C. Then, the resistance at 45°C is 1.1 ohms.

Resistance in a material is the hindrance to electric current. The resistance through a material depends on the electric voltage, temperature and current.

The resistance is directly proportional to the temperature.

then given R1/T1 = R2/T2

Given the resistance at 100 °C is 2.5 ohms .

R2 = 9.6 ohms

then, T2 = R2 T1/R2

T2 = (9.6 ohms × 100°C)/2.5 ohms = 384°C.

Then, the resistance at 45 degree Celsius is calculated as follows;

R2 = (2.5 ohms × 45)/100°C = 1.1 ohms.

Therefore, the resistance of platinum at 45°C is 1.1 ohms.

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Answer:

1st

Explanation:

It is because the horse is heavier

Seismic movement, Volcanic Activity, Plate Tension

Answer:

Explanation:

The vertical component is found in the magnitude of the force times the sine of the angle; the horizontal component is found in the magnitude of the force times the cosine of the angle. Thus:

vertical component = \(60.0sin(30.0)=30.0\) and

horizontal component = \(60.0cos(30.0)=52.0\)

3.00 x 0.68= 2.04

To find magnification, you multiply your object by the factor

Answer:

I believe it's A

Explanation:

The object with the greater mass (m2) will have the greater magnitude of momentum (p2).

Momentum (p) is defined as the product of an object's mass (m) and its velocity (v). Mathematically, momentum can be represented as p = m * v.

Given that two objects have equal, non-zero kinetic energies, it implies that both objects have the same amount of energy associated with their motion.

However, the kinetic energy of an object depends on its mass (m) and velocity (v) and is given by the equation KE = (1/2) * m * v^2.

If the kinetic energies of the two objects are equal, it means that (1/2) * m1 * v1^2 = (1/2) * m2 * v2^2, where m1 and m2 represent the masses of the two objects, and v1 and v2 represent their respective velocities.

Rearranging the equation, we have m1 * v1^2 = m2 * v2^2.

Since the kinetic energies are equal, the squares of the velocities must be inversely proportional to the masses: v1^2/v2^2 = m2/m1.

From this equation, we can conclude that the ratio of the squares of the velocities is equal to the ratio of the masses.

Now, comparing the momenta of the two objects, we have p1 = m1 * v1 and p2 = m2 * v2.

Using the previous equation, we can rewrite p2 as p2 = m1 * v1 * (v2^2/v1^2) = m1 * v2 * (v2/v1).

Since the ratio v2/v1 is greater than or equal to 1 (as both objects have non-zero velocities), it follows that p2 is greater than or equal to m1 * v1.

Therefore, the object with the greater mass (m2) will have the greater magnitude of momentum (p2).

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Answer:

I think it is 2m/s2

Explanation:

Have a great day:)

a) The central idea of the text or literature is about increasing the jail terms for young offenders or making the jail terms harsher for young offenders.

b) The article indicates that the Justice System ought to be strengthened by lowering the age of those required to be tried as adults. It also speaks to the bias in the judicial system where young aboriginal offenders are treated differently by being jailed earlier and for longer.

c) Respect for identity can help shape the Youth Judicial System if all identities are treated as equal under the law. When the law beings to create separate terms for various offenders of different identities, then justice is enervated.

All criminal matters involving minors under the age of 18 are handled by the Youth Judicial System. They are less official than other courts and enable the young person and their family to participate more. The youth court is presided over by a district judge (magistrate's court) and two lay judges.

The primary components of the juvenile justice system, such as law enforcement, prosecution and the courts, and prisons, are also highlighted. Corrections is provided in a wide perspective, with each component of corrections addressed in detail.

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Answer:

HI!

Here is ur answer

Magnetic PE depends on both distance and orientation in the magnetic field. ... The magnetic fields are aligned. This makes an attractive force between the two magnets. The farther apart they are, the higher their potential energy.

a)

Since we have a constant angular acceleration we have that:

Plugging the values we know we have that:

Therefore it will take 0.516 (rounded to three decimals) seconds to achive this angular velocity.

b)

To find how many revolutions he needs we first calculate the change in angular position using the formula:

Now we divide this change in angular position by 2pi (the angle equivalent to a revolution) to get the revolutions:

Therefore it takes 0.094 (round to three decimals) revolutions to get to this angular velocity.

c)

The torque is the force by the radius, then we have:

But the torque is also equal to the moment of inertia multiplied by the angular acceleration:

Then we have:

Now we use the formula for angular acceleration to get the time:

Therefore it takes 0.573 seconds to stop the merry go round.

According to research: "They mix in mixture vary because the composition of the mixture is not fixed." A mixture is a material system made up of two or more different substances which are mixed but are not combined chemically. A mixture refers to the physical combination of two or more substances on which the identities are retained and are mixed in the form of solutions, suspensions, and colloids. The properties of a mixture can vary, because the composition of a mixture is not fixed. If amount one of substance in mixture is changed, the properties such system is also changed. Please mark as brainliest.

Hope this helps :)

Answer:

a. 1.81

b. using the lap button feature

Explanation:

a. avg of the times

The activity that is not part of sustainable development is option 3, where forests are cut down and new trees regrow to replace them. This is because it takes several years for new trees to grow, and the rate at which they are being cut down is much higher than the rate at which they are being replaced.

This can lead to deforestation, which can cause soil erosion, water pollution, and loss of biodiversity.
On the other hand, options 1, 2, and 4 are sustainable activities as they focus on conserving resources and reducing environmental impact.

Limited harvesting of fish ensures that their populations are not depleted, while replacing water in the Great Lakes ensures that the ecosystem remains balanced. Solar energy is a renewable source of energy that does not produce harmful emissions and reduces the dependence on non-renewable sources like coal and oil.

In conclusion, sustainable activities focus on using resources in a responsible and efficient manner, ensuring that they are not depleted and do not cause harm to the environment. It is essential to adopt sustainable practices to ensure the long-term health and well-being of our planet.

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Answer:

Explanation:

The time taken by the motorcycle to reach the city can be found by using the formula

\(t = \frac{d}{s} \\ \)

d is the distance

s is the speed

From the question

d = 200 miles

s = 70 miles / hour

We have

\(t = \frac{200}{7} \\ = 28.571428 \\ \)

We have the final answer as

Hope this helps you

Answer:

Final

Explanation:

Displacement equals final position minus initial position.

Answer:

∆p.e = mg∆h

Explanation:

Take height reference be h1 while height final be h2.

∆h = (h2 - h1)

m = m

g = g

•°• ∆p.e = mg(h2 - h1)

=> ∆p.e = mg∆h

Answer:

1240000 kg * m/s

Explanation:

p = momentum

p = mass * velocity in kg* m/s

62,000 kg * 20 m/s = 1240000 kg * m/s

Answer:

The difference between the students' value and the accepted value is:

343 m/s - 240 m/s = 103 m/s

To calculate the difference as a percentage of the accepted value, we divide the difference by the accepted value and multiply by 100:

(103 m/s / 343 m/s) x 100% = 30%

Therefore, the difference between the students' value and the accepted value is 30% of the accepted value.

Answer: 30.03%

Explanation:

Step 1: Find the difference between the two values.

Difference = |Accepted Value - Students' Value|

Difference = |343 m/s - 240 m/s|

Difference = 103 m/s

Step 2: Divide the difference by the accepted value.

Percentage Difference = (Difference / Accepted Value) * 100

Percentage Difference = (103 m/s / 343 m/s) * 100

Step 3: Calculate the percentage.

Percentage Difference ≈ 30.03%

The difference between the students' value and the accepted value is approximately 30.03% of the accepted value.

The jogger's speed was indeed 4 m/s, as speed is the distance traveled divided by time (400m / 100s = 4 m/s).

However, velocity is a vector quantity that includes both magnitude and direction. Since the jogger completed a lap and returned to the starting point, their overall displacement is zero, resulting in a velocity of 0 m/s. So, the first friend is incorrect in stating that the velocity was 4 m/s.

The second friend is correct. Velocity is a vector quantity that includes both speed and direction, whereas speed is a scalar quantity that only indicates how fast something is moving. Since the question does not provide any information about the direction of the jogger's movement, it is not possible to determine their velocity. However, based on the given information, the jogger's speed can be calculated as distance divided by time, which is 4 m/s (400 m divided by 100 s).

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Answer:

B. Newton's second law of motion

Explanation:

Newton's Second Law of Motion states that the acceleration of a physical object is directly proportional to the net force acting on the physical object and inversely proportional to its mass.

Mathematically, it is given by the formula;

\( Net \; Force = mass * acceleration \)

Making acceleration the subject of formula, we have;

\( Acceleration = \frac {Net \; Force}{Mass} \)

In this scenario, the acceleration of a baseball after it is hit by a bat depends on the mass of the ball and the net force on the ball. Thus, this example best illustrates Newton's second law of motion.

The composition of the Moon differs from that of the Earth and Mercury. While the Earth and Mercury have similar compositions dominated by metallic elements, the Moon has a higher abundance of rocky materials.

The Moon is primarily composed of rocky materials, such as silicates and oxides, with smaller amounts of metals like iron and nickel. It lacks a significant atmosphere, water, and organic compounds. This composition is different from both the Earth and Mercury.

The Earth has a diverse composition, consisting of a solid inner core primarily composed of iron and nickel, a molten outer core, a mantle composed of silicate minerals, and a crust containing a mix of rocks and minerals. It also has an atmosphere composed mainly of nitrogen and oxygen.

On the other hand, Mercury, the closest planet to the Sun, has a composition similar to Earth's core. It is predominantly composed of iron (approximately 70% of its mass) and has a thin rocky crust. Mercury's lack of a significant atmosphere and limited geological activity contribute to its different composition compared to both the Earth and the Moon.

In summary, the Moon has a composition dominated by rocky materials, while the Earth has a more diverse composition with metallic elements and an atmosphere. Mercury shares similarities with Earth in terms of metallic composition but has a distinct lack of geological activity and atmosphere.

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Hello,

A roller coaster is moving 10 m/s and a mass of 7 kg. The roller coaster has kinetic  energy.

✔ We have : Ek = 1/2m x v²; with Ek in J, m in kg and v in m/s

In the case of starlight passing through a cloud of hydrogen atoms, the dominant cause for line broadening is ________.

In the case of a laser beam passing through a methane cell, the largest line broadening effect is due to ________.

In the case of starlight passing through a cloud of hydrogen atoms, the dominant cause for line broadening depends on the given parameters. The natural line width (AwN) is primarily determined by the lifetime of the excited state, which is given as to. The Doppler width (Awp) is influenced by the temperature (T) and the mass of the particles. The collision width (Awc) is influenced by the collision cross section and the particle density (n). To determine the dominant cause, we need to compare these factors and assess which one contributes the most significantly to the line broadening.

In the case of a laser beam passing through a methane cell, the line broadening is affected by different factors. The natural line width (AwN) is related to the energy-level structure and transition probabilities of the absorbing molecules. The Doppler width (Awp) is influenced by the temperature (T) and the velocity distribution of the molecules. The flight time width (AwFT) is determined by the transit time of the molecules across the laser beam. To identify the largest contributor to line broadening, we need to evaluate these effects and determine which one has the most substantial impact on the broadening of the spectral line.

the dominant cause of line broadening in starlight passing through a cloud of hydrogen atoms and in a laser beam passing through a methane cell depends on various factors such as temperature, particle density, collision cross section, and energy-level structure. To determine the dominant cause and the largest contributor, a thorough analysis of these factors is required.

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Answer:

A

Explanation:

The officer would have had permission regardless of anything else, kind of like letting someone into your house.