whats the kinetic energy of an object that has a mass of 30 kilograms and moves with a velkocity of 20

Answer: Large-scale surface ocean currents are driven by global wind systems that are fueled by energy from the sun. These currents transfer heat from the tropics to the polar regions, influencing local and global climate.

Explanation:

I hope this helped you some!

No. That would be silly.  The water in the tropics is the warmest, since the sun is most direct there.  

Any ocean current that takes water away from the tropics moves the water to cooler places, where the water cools off.  ESPECIALLY the poles, home of the coldest water on Earth.  ICE even !

Explanation:

\(E = \frac{BA}{t} \sin( \theta) \\ = \frac{1.23 \times 2}{1} \\ = 2.46 \: V\)

The force acting on Charge A will be towards Charge B.

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Answer:

i dont know

Explanation:

Sorry and good luck

The Hertzsprung-Russell (HR) diagram is a plot of luminosity versus temperature. HR diagrams are used to determine the age, distance, and relative size of stars. A typical HR diagram shows main sequence stars on the left side of the diagram, giant stars in the middle, and supergiant stars on the right side.

The location of stars on the HR diagram reveals a lot about the conditions of the star. For example, main sequence stars are stars that have reached a state of equilibrium between their inward pull of gravity and their outward radiation pressure. They are characterized by a stable core temperature and a stable rate of energy generation.

On the other hand, giant stars are stars that have exhausted the fuel in their core, causing the core to contract and heat up, while the outer layers expand and cool. This causes the star to move to the right on the HR diagram.

Supergiant stars are even larger than giant stars and have even cooler and more luminous outer layers. They are found on the upper right-hand corner of the HR diagram.

White dwarfs are stars that have exhausted all of their nuclear fuel and have contracted to a very small size. They are located on the lower left-hand side of the HR diagram.

Overall, the location of a star on the HR diagram provides a lot of information about the conditions of the star, including its size, temperature, and luminosity.

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Answer:

Gravity overcomes the hex nut's stationary inertia and moves the nut straight down into the bottle.

Explanation:

Hope this helps.

Have a good night ma´am/sir.

Be safe!

Answer:

velocity, power, energy, force and density

Explanation:

Answer:

B.

Goals are scored by kicking the ball through goalposts.

Explanation:

Answer:

Gravity increase:

mass increases

distance decrease

gravity decrease:

mass decrease

distance increase

hope this helps

have a good day :)

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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When two objects collide and stick together, their combined speed after the collision can be calculated using the conservation of momentum principle. The principle states that the total momentum of an isolated system remains constant if no external forces act on it.

In this case, the initial momentum of the two players before the collision can be calculated as follows:

75 kg * 6 m/s + 100 kg * (-8 m/s) = 450 kg m/s

After the collision, the players stick together, and their combined speed can be calculated as follows:

Final momentum = (75 kg + 100 kg) * v

450 kg m/s = 175 kg * v

v = 450 kg m/s / 175 kg = 2.57 m/s

So, the combined speed of the two players just after the collision would be 2.57 m/s.

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cant really answer here with text but at the top of the slide it should br positives and towards the bottom its negative.

This is because you go faster at the top of the slide than the bottom and when your at the bottom you slow down

In broad terms, energy can exist in two states: potential energy and kinetic energy.

Kinetic energy is the energy possessed by a body due to its motion.

Mathematically, the formula for kinetic energy is given as;

K.E = ¹/₂mv²

where;

Potential energy is the energy possessed by a body due to its position above the ground.

The formula for potential energy is given as;

P.E = mgh

where;

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The internal heat provides energy for the convection of gases in the atmosphere and leads to the formation of thunderstorms and cyclones.

Astronomers believe that Jupiter generates its internal heat through the processes of contraction and differentiation. The gravitational energy that Jupiter had from its formation in the solar system is still present, and it also generates a significant amount of heat.

The heat is also generated by the radioactive decay of isotopes such as aluminum, thorium, and potassium. Jupiter is a gas giant planet, with a diameter of around 150 thousand kilometers. It has a thick atmosphere and a small core surrounded by layers of hydrogen and helium.

Due to the intense pressure and temperature within the core, the hydrogen gas in the core is in a liquid metallic state. The metallic hydrogen conducts electricity, and the movement of the electrically conducting liquid metallic hydrogen generates a magnetic field.

Jupiter's internal heat is also responsible for the stormy activity in the atmosphere of the planet. The internal heat provides energy for the convection of gases in the atmosphere and leads to the formation of thunderstorms and cyclones.

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Answer:

V =  1.25E-7 cubic meter

(i) The hydraulic gradient is 0.45.

(ii) The flow rate is approximately 0.00000167 cubic meters per second.

(iii) The hydraulic conductivity is approximately 0.000037 meters per second.

(i) Hydraulic gradient:

The hydraulic gradient (i) can be calculated by dividing the head difference (h) by the distance (L) between the manometer tappings:

i = h / L

Given:

Head difference (h) = 45 mm

Distance between manometer tappings (L) = 100 mm

Converting the units to meters:

h = 45 mm / 1000 = 0.045 m

L = 100 mm / 1000 = 0.1 m

Substituting the values into the formula:

i = 0.045 m / 0.1 m = 0.45

(ii) Flow rate:

The flow rate (Q) can be calculated using the equation:

Q = (V / t) / A

Where V is the quantity of water collected, t is the duration of the test, and A is the cross-sectional area of the test sample.

Given:

Quantity of water collected (V) = 500 ml = 0.5 L

Duration of test (t) = 300 seconds

Diameter of test sample (d) = 100 mm

Converting the units to meters:

V = 0.5 L = 0.5 / 1000 = 0.0005 m³

t = 300 seconds

d = 100 mm / 1000 = 0.1 m

Calculating the cross-sectional area (A) using the formula for the area of a circle:

A = π * (d/2)^2

Substituting the values:

A = π * (0.1/2)^2 = π * 0.005^2 = 0.00007854 m²

Substituting the values into the formula for flow rate:

Q = (0.0005 m³ / 300 s) / 0.00007854 m²

Calculating the flow rate:

Q = 0.00000167 m³/s

(iii) Hydraulic conductivity:

The hydraulic conductivity (K) can be calculated using Darcy's Law:

K = Q / (A * i)

Given the values we calculated:

Q = 0.00000167 m³/s

A = 0.00007854 m²

i = 0.45

Substituting the values into the formula:

K = 0.00000167 m³/s / (0.00007854 m² * 0.45)

Calculating the hydraulic conductivity:

K ≈ 0.000037 m/s

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Answer:

0.832

Explanation:

8.320 x 10 to the negative 1st power is 0.832

Newton's second law allows finding the answer for the positive direction in circular motion is:

Newton's second law is stable that the net force is proportional to the product of the mass and the acceleration of the bodies, this law is valid for all linear and rotational movements.

                   F = m a

Where the bold letters indicate vectors, F is the force, m the mass and the acceleration.

Newton's second law the direction of the net force is the same direction of the acceleration, in the case of circular motion the acceleration is directed towards the center of the circle in a radial direction.

Consequently this is the direction of the resultant force is towards the center of the circle and this is the positive direction of motion.

In conclusion using Newton's second law we can find the positive direction in the circular motion is:

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Within the subject of technology, radiogenic heat may be described because of the type of warmth that is released when radioactive isotopes disintegrate. consequently, we say that the thermal strength is launched by means of the nuclear disintegration of the radioactive isotopes.

Approximately 50% of the Earth's inner warmness originates from radioactive decay. four radioactive isotopes are chargeable for the general public of radiogenic warmness because of their enrichment relative to different radioactive isotopes uranium-238 (238U), uranium-235 (235U), thorium-232 (232Th), and potassium-40 (40K).

Radioactive heating refers back to the power dissipated within the interiors of planets, satellites, or asteroids as a consequence of the radioactive decay of radioactive isotopes (see radiochemistry). Radioactive isotopes are characterized by their decay energies and their half-lives.

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Answer:

Civil law deals with behavior that constitutes an injury to an individual or other private party, such as a corporation. Examples are defamation (including libel and slander), breach of contract, negligence resulting in injury or death, and property damage.

Explanation:

That's correct. The Earth's tilt, known as axial tilt or obliquity, causes its position relative to the stars and constellations to change as the Earth rotates and orbits the Sun.

The Earth's axis of rotation is tilted at an angle of approximately 23.5 degrees with respect to its orbital plane. This tilt remains constant throughout the year as the Earth orbits the Sun. As a result, different parts of the Earth receive varying amounts of sunlight at different times of the year, leading to the changing of seasons.

Due to this tilt, as the Earth orbits the Sun, the position of the North and South Poles and the equator relative to the stars and constellations appears to shift. This phenomenon is known as precession. Over a period of approximately 26,000 years, the Earth's axis traces out a cone shape, causing the position of the celestial poles to change. This means that the North Star (Polaris) is not a fixed point but changes over time.

The motion of precession and the Earth's tilt contribute to the changing positions of the stars and constellations relative to an observer on Earth throughout the year.

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One way organisms with similar niches reduce competition when they are found in the same ecosystem is by resource partitioning.

One example of resource partitioning is when two species of birds foraging together feed on different resources; one eats insects on tree trunks while the other eats insects in the outer branches.

Resource partitioning, which helps prevent rivalry in an ecological niche, is the division of scarce resources among species.

Two similar species employ mostly non-overlapping resources as a result of this type of evolution, and as a result, they occupy different niches. Because there is less direct rivalry between the species as a result of this resource partitioning, the species can coexist.

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Answer:

Approximately \(1.3\times 10^{8}\; \rm m\cdot s^{-1}\).

Explanation:

Look up the speed of light in vacuum: \(c \approx 3.00\times 10^{8}\; \rm m\cdot s^{-1}\). Denote the speed as \(c\).

If the speed of light in a medium is \(v\), the refractive index of that medium would be:

\(\displaystyle n = \frac{c}{v}\).

Note, that the refractive index of a medium is inversely proportional to the speed of light in this medium. A medium with a larger refractive index would thus correspond to a slower speed of light.

Rearrange this equation to find the speed of light \(v\) in this medium:

\(\begin{aligned}v &= \frac{c}{n} \\ &= \frac{3.00\times 10^{8}\; \rm m\cdot s^{-1}}{2.4} \\ &\approx 1.25 \times 10^{8}\; \rm m\cdot s^{-1}\end{aligned}\).

Answer:-00=;op

Explanation:poop

Answer:

450 hz X 4 = 1800

Explanation: Speed =

Wavelength (4) X frequency (450)

Im not 100% sure though

Answer:

the maximum displacement or distance moved by a point on a vibrating body or wave measured from its equilibrium position. It is equal to one-half the length of the vibration path.

Explanation:

The near-point of this person's eye is approximately 0.13 cm (or 1.3 mm) when rounded to 2 significant figures.

To find the near-point of a person's eye with presbyopia, we can use the formula:

Near-point = Lens-to-retina distance - Far-point

The far-point is the distance at which the eye can focus on distant objects, and it is related to the maximum optical power of the eye (P) by the equation:

Far-point = 1 / P

Given that the maximum optical power of the eye is 53.3 D (diopters), we can substitute this value into the equation:

Far-point = 1 / 53.3 D ≈ 0.0187 m ≈ 1.87 cm

Now, we can calculate the near-point:

Near-point = 2.0 cm - 1.87 cm ≈ 0.13 cm

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When the tension on a rope is increased, the wave velocity (v) and the mass per unit length (µ) of the rope remain unchanged, while the wavelength (λ) and the tension (T) increase.

The frequency (f) remains unaffected. When the frequency of the waves on the rope is increased, the wave velocity (v) remains unchanged, while the wavelength (λ) decreases and the frequency (f) and tension (T) increase. The mass per unit length (µ) of the rope remains unaffected.

a) When the tension on the rope is increased, the wave velocity (v) remains unchanged because it depends on the properties of the medium through which the wave travels and is not affected by tension. The wavelength (λ) increases because it is inversely proportional to tension, meaning that as tension increases, the wavelength also increases.

The mass per unit length (µ) of the rope remains unchanged because it is determined by the properties of the rope and is independent of tension. The tension (T) increases because it is directly proportional to tension. The frequency (f) remains unaffected by the change in tension as it is determined by the source of the waves and not affected by the properties of the medium.

b) When the frequency of the waves on the rope is increased, the wave velocity (v) remains unchanged as it is determined by the properties of the medium and is independent of frequency. The wavelength (λ) decreases because it is inversely proportional to frequency. As the frequency increases, the wavelength decreases accordingly. The tension (T) increases because it is directly proportional to frequency. The mass per unit length (µ) of the rope remains unaffected as it is determined by the properties of the rope and is independent of frequency.

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Answer:

9,000,000J

Explanation:

10kW is converted to Joules by multiplying 1000. Which is 10000W

15 minutes is converted to seconds, which is 900s

Energy transfer is Power(J) × Time(s)

so: 1000× 900

=9,000,000 J or 9000 kJ

The maximum safe speed of the sports car on the banked road is 31.3 mph.

The maximum safe speed of the car can be calculated using the formula V = sqrt(μs * g * rho * tan(theta)), where V is the maximum safe speed, μs is the coefficient of static friction between the tires and the road, g is the acceleration due to gravity, rho is the radius of curvature of the road, and theta is the angle of inclination of the banked road. Substituting the given values, we get V = sqrt(0.1 * 32.2 ft/s^2 * 500 ft * tan(30 deg)) = 31.3 mph, where acceleration due to gravity is taken 32.2ft/s^2.

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