Select all of the ways collection areas use to gain water.

Question 1 options:

water evaporates from the collection area


runoff from precipitation


precipitation falls direction into the collection area

Answer:

Explanation:

Solar energy is efficently present naturally , whereas coal and natural gas are more efficient by reliable applications, things like coal and natural gases are also non renewable they also cause pollution .so using solar enery are better than coal and natural gases.

The radius of the new planet will be approximately 1.20 × 10⁷ meters to have the same acceleration due to gravity as Earth.

The acceleration due to gravity on Earth is approximately 9.81 m/s².

We can use the formula for the acceleration due to gravity:

g = G M / r²

where:

g = acceleration due to gravity

G = gravitational constant (6.67430 × 10⁻¹¹m³ kg⁻¹ s⁻²)

M = mass of the planet

r = radius of the planet

Setting the acceleration due to gravity of the new planet equal to that of Earth and plugging in the given values, we get:

9.81 m/s² = (6.67430 × 10⁻¹¹ m³kg⁻¹s⁻²) (4.4 × 10²⁵kg) / r²

Solving for r, we get:

r =  √((G M) / g)

r = √((6.67430 × 10⁻¹¹m³kg⁻¹s⁻²) (4.4 × 10²⁵kg) / 9.81 m/s²)

r = 1.20 × 10⁷meters

Therefore, the radius of the new planet must be approximately 1.20 × 10⁷ meters to have the same acceleration due to gravity as Earth.

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Answer: A car heading north collides at an intersection with a truck of the same mass as the car heading east. If they lock together and travel at 28 m/s at 46° north of east just after the collision, then the car initially traveling with a velocity of 40.28m/s.

Explanation: To find the answer, we need to know more about the Perfectly inelastic collision.

               \(m_1v_1+0=(m_1+m_2)v_2\\\)

               \(mv_1=(m+m)28 sin46\\v_1=2*28*0.719=40.28 m/s\)

Thus, we can conclude that, the initial velocity of the car will be 40.28m/s.

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Answer:

105.6 KJ

Answer

3.7/5

4

hope this will help you friend.

ANSWER:

(a) 108 J

(b) 0 J

(c) 108 J

STEP-BY-STEP EXPLANATION:

(a)

Express the relation between horizontal component of work done and force on the crate:

Here Wh is the horizontal component of the work done on the crate and Fh is the horizontal component of force and d is the distance of the crate across the floor.

Replacing:

(b)

Express the relation between vertical component of work done and force on the crate:

Here Wv is the vertical component of the work done on the crate and Fv is the vertical component of force and d is the distance of the crate across the floor.

Replacing:

(c)

Express the relation for total work done by the 45 N force:

Polar melting has the potential to shut down the North Atlantic Current due to its impact on the oceanic circulation system. As ice melts in the polar regions, it releases fresh water into the surrounding seas.

This influx of fresh water can disrupt the density-driven circulation known as the thermohaline circulation, which drives the North Atlantic Current.

The North Atlantic Current is part of the larger global thermohaline circulation system, also known as the ocean conveyor belt. This circulation system relies on the differences in temperature (thermo) and salinity (haline) to drive the flow of ocean currents. Warmer, saltier water tends to be less dense and rises, while cooler, less salty water is denser and sinks.

When polar ice melts, it introduces a large volume of fresh water into the ocean, reducing the overall salinity. This influx of fresh water decreases the density of the seawater, disrupting the sinking of dense water in the North Atlantic. As a result, the thermohaline circulation weakens or even shuts down, potentially halting the North Atlantic Current.

If polar melting continues at an accelerated pace, it could disrupt the delicate balance of the thermohaline circulation system, leading to a shutdown of the North Atlantic Current. The consequences of such a shutdown would be significant, as the North Atlantic Current plays a crucial role in redistributing heat from the tropics to the North Atlantic region, influencing weather patterns and climate.

This disruption could have far-reaching effects on oceanic ecosystems, coastal regions, and even global climate patterns. Therefore, understanding and monitoring the impact of polar melting on oceanic circulation is vital for predicting and mitigating the potential consequences of a shutdown of the North Atlantic Current.

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Answer:

The melting ice causes freshwater to be added to the seawater in the Arctic Ocean which flows into the North Atlantic. The added freshwater makes the seawater less dense. This has caused the North Atlantic to become fresher over the past several decades and has caused the currents to slow.

Answer:

Explanation:brazilian

Specific heat is quantity of heat required to increase the temperature of a substance by one degree celsius.

The formula to calculate heat energy is

Q=mc∆T

We know, Q=mc∆T

Where Q = heat energy

m = mass

c= specific heat capacity

∆T= change in temperature

Thus,

According to above formula

c= Q/m∆T

Here m= 2 kg

∆T= 5 degrees

Q= 2000 joules

c= 2000/2×5

c= 200

Thus, the specific heat capacity of the block is 200.

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The skater does indeed reach the same height on either side of the track With friction turned on.

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In the east direction the electric field point at a position directly west of a negative charge. Option C is correct.

An electric field is an electric property that is connected with any location in space where a charge exists in any form. The electric force per unit charge is another term for an electric field.

Charges that are similar repel each other, whereas charges that are dissimilar attract each other. The term "neutral" refers to an item that has no net charge.

The electric field points immediately west of a negative charge in an easterly direction.

Hence, option C is correct.

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The specific heat capacity of copper is 0.888 kJ/(kg × °C).

Specific heat capacity is a thermal property of a substance. It indicates how much heat energy is needed to raise the temperature of a unit mass of a substance by one degree Celsius.

The formula for calculating the specific heat capacity of a substance is given as, q = m × c × ∆T`

Where: q = energy,

m = mass of the substance,

c = specific heat capacity of the substance,

∆T = change in temperature.

Now, let’s use the formula above to calculate the specific heat capacity of copper.

The energy required to raise the temperature of a 1 kg block of copper by 10°C is 8.88 kJ.

q = m × c × ∆T

c = q / (m × ∆T)

= 8.88 kJ / (1 kg × 10°C)

= 0.888 kJ/(kg × °C)

The specific heat capacity of copper is 0.888 kJ/(kg × °C).

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Given the total energy in the wire, current and time elapsed, the potential difference is 50 Volts.

The electric power is expressed as P = VI.

Where V is the potential difference, I is the electric current and P is the electric power.

Also, the consumption of energy per unit of time is called power. It is expressed as P = E / t

Given that;

First, we determine the power.

P = E / t

P = 500J / 5s

Power = 100W

Next, we determine the potential difference.

P = V × I

V = P / I

V = 100W / 2.00A

V = 50V

Given the total energy in the wire, current and time elapsed, the potential difference is 50 Volts.

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The Potential difference is 50 Volts.

The potential difference is a measure of the energy given to the charge carriers in a circuit

We know that  the electric power is expressed as P = VI.

V is the potential difference

I is the electric current
P is the electric power.

Also we know that power is expressed as P = E / t

Given

Current( I) = 2.00A ,time t = 5s

Total energy E = 500J

To find the power

P = E / t  = 500J / 5s = 100W

Now , To find the potential difference.

P = V × I (By rearranging it)

V = P / I

V = 100W / 2.00A = 50 V

Therefore , the total energy in the wire, current and time elapsed, the potential difference is 50 V.

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The change in gravitational potential energy of the spacecraft as it moves from point B to point A is 8.3x10^9 J.

The change in gravitational potential energy of the spacecraft as it moves from point B to point A can be calculated using the formula:

                    \(ΔPE = -GMm(1/rA - 1/rB)\) , where

ΔPE is the change in gravitational potential energy,

G is the gravitational constant,

M is the mass of the planet,

m is the mass of the spacecraft,

rA is the distance from the planet's center at point A, and

rB is the distance from the planet's center at point B.

Using the given values, we have:

\(ΔPE = -(6.67x10^-11 Nm^2/kg^2)(1.50x10^24 kg)(650 kg)(1/5.00x10^7 m - 1/0)\)\(ΔPE = -(6.67x10^-11 Nm^2/kg^2)(1.50x10^24 kg)(650 kg)(1/5.00x10^7 m - 1/0)\)

Simplifying the expression, we get:

\(ΔPE = -8.3x10^9 J\)

Therefore, the change in gravitational potential energy of the spacecraft as it moves from point B to point A is \(8.3x10^9\)J, which is a negative value because the spacecraft is moving closer to the planet and its gravitational potential energy is decreasing.

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this is my answer sure po ako n tama iyan

Answer:

73 neutrons.

Explanation:

Data obtained from the question:

Mass number of Xenon = 127.

Neutron number =...?

We can obtain the number of neutron present as follow:

Atomic number of Xenon = 54

Recall:

Atomic number = proton number = 54

Mass number = proton + neutron

127 = 54 + Neutron

Neutron = 127 – 54

Neutron = 73.

Therefore, 73 neutrons are present in the Xenon atom.

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 minimum value of the coefficient of static friction is 1.33.

To calculate the minimum value of the coefficient of static friction, we need to determine the force of static friction acting on the block. The force of static friction is equal to the force of gravity acting on the block (mg) multiplied by the coefficient of static friction (µs

m = 14.26kg

θ = 41°

g = 9.8 m/s²

The force of gravity acting on the block is given by the formula:

Fg = mg

where,

m =  (mass of the block)

g =  (acceleration due to gravity)

Fg = 14.26kg *9.8 m/s²

Fg = 139.75 N

The force of static friction can be found using the formula:

Fstatic = µs * N

where,

µs = coefficient of static friction (unknown)

N = Normal force acting on the block

The normal force acting on the block is equal to the force of gravity acting on the block perpendicular to the ramp.

N = mg * cos(θ)

where,

θ = 41 degrees (incline of the ramp)

N = 14.26kg * 9.8 m/s² * cos 41°

N = 105.47 N

So,

Fstatic = µs * (mg * cos(θ))

making µs subject of the formula and substituting already calculated vaues we get,

µs =      Fstatic

          (mg * cos(θ))

µs =    139.75 N

         105.47 N

µs = 1.33

This is the minimum value of the coefficient of static friction.

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Answer:

elephant

Explanation:

Answer:

elephant

Explanation:

The oscillation frequency of the ideal harmonic oscillator is approximately 3.216 Hz.

To find the oscillation frequency of the ideal harmonic oscillator, we can use the formula:

E = (1/2) × k × A²

Where:

E = Total mechanical energy

k = Spring constant

A = Amplitude

First, we need to determine the spring constant (k). Rearranging the formula, we have:

k = 2 × E / A²

Plugging in the given values, we get:

k = 2 × 4.0 J / (0.281 m)²

k = 2 × 4.0 J / (0.281² m²)

k = 2 × 4.0 J / 0.078961 m²

k ≈ 102.394 N/m

Now, we can find the oscillation frequency using the formula:

f = 1 / (2π) × √(k / m)

Where:

f = Frequency

π ≈ 3.14159

m = Mass

Given that the mass (m) is 0.25 kg, we can substitute the values:

f = 1 / (2π) × √(102.394 N/m / 0.25 kg)

f = 1 / (2π) × √(409.576 N/kg)

f ≈ 1 / (2π) × 20.236 Hz

f ≈ 3.216 Hz

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Ultrasound waves at intensities above 104 W/m² can do serious damage to living tissues,  104 W/m² corresponds to 160 dB, 170 dB is the sound intensity level, in decibels, of ultrasound with intensity 105 W/m²,

An ultrasonic scan employs high-frequency sound waves to generate a picture of a person's interior body components. Ultrasound is frequently used by medical professionals to examine a growing foetus (unborn child), a person's abdominal and pelvic organs, muscles, tendons, heart, and blood vessels.

Given that,

Ultrasound waves at intensities above 10⁴ W/m² corresponds to 160 dB.

ultrasound with intensity 10⁵ W/m².

Sound intensity levels in dB is defined as:

β = 10 log \((\frac{I}{I_0})\)

where \(I_0\) is the reference intensity levels.

so, β₁ - β₂ = 10 log \((\frac{I_1}{I_0})\) - 10 log \((\frac{I_2}{I_0})\)

or, β₁ - β₂ = 10 log \((\frac{I_1}{I_2})\)

or, β₁  = β₂ + 10 log \((\frac{I_1}{I_2})\)

so, for β₂ = 160 dB, I₂ = 10⁴ W/m² , I₁ = 10⁵ W/m²

or, β₁  = β₂ + 10 log \((\frac{10^4}{10^5})\)

or,  β₁  = 160 + 10 log \((\frac{10^4}{10^5})\)

or, β₁  = 170 dB.

Thus, the sound intensity level is: 170 dB.

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Answer:

hygiene

Explanation:

have a great day

Answer:

hygiene

Explanation:

the definition of carcinogen is: any substance that causes cancer,

so it can't be that.

(a) The effort required to push the block up the slope is 3600 N.

(b) the ideal mechanical advantage of the slope is 2.92

(c) The efficiency of the slope is 68.5%.

a) To calculate the effort required to push the block up the slope, we can use the formula:

Effort = Load / AMA

where;

Load = 7200 N

AMA = 2

Effort = 7200 N / 2

Effort = 3600 N

b) The ideal mechanical advantage (IMA) of an inclined plane is given by the formula:

IMA = Length of slope / Height of slope

Length of slope = 100 m

Angle of slope = 20°

We can use trigonometry to find the height of the slope:

Height of slope = Length of slope x sin(angle of slope)

Height of slope = 100 m x sin(20°)

Height of slope = 34.2 m (rounded to one decimal place)

Therefore, the ideal mechanical advantage of the slope is:

IMA = 100 m / 34.2 m

IMA = 2.92 (rounded to two decimal places)

c) The efficiency of the slope is given by the formula:

Efficiency = AMA / IMA x 100%

AMA = 2

IMA = 2.92

Efficiency = 2 / 2.92 x 100%

Efficiency = 68.5% (rounded to one decimal place)

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The wire's speed and direction of motion can be determined using the Lorentz force equation and the principles of electromagnetism.

The wire will experience a force due to the interaction between the magnetic field and the current flowing through it. This force will cause the wire to move.

The Lorentz force equation is given by F = qvB, where F is the force, q is the charge, v is the velocity, and B is the magnetic field strength. In this case, the wire's charge is q = I * t, where I is the current and t is time. The force experienced by the wire is then F = I * t * v * B.

To find the velocity as a function of time, we can integrate the acceleration equation with respect to time, assuming the wire starts from rest at t = 0. Integrating gives v = (I * B * t^2) / (2 * m).

Plugging in the given values: I = 16 A, B = 97 T, m = 53 kg, and t = 0.6 s, we can calculate the speed and direction of the wire at t = 0.6 s using the derived equation.

Substituting the values, v = (16 A * 97 T * (0.6 s)^2) / (2 * 53 kg) = 12.53 m/s.

Therefore, at t = 0.6 s, the wire's speed is 12.53 m/s to the right (positive direction).

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The relationship between the angles of incidence and refraction when a light ray passes across the boundary between two media with differing refractive indices is described by Snell-Descartes law.

Snell's law

n₁sinθ₁ = n₂sinθ₂

In the following equation, n1 and n2 stand for the refractive indices of the two media. θ₁ for angle of incidence (the angle between the incident ray and the normal to the boundary), and θ₂ for angle of refraction (the angle between the refracted ray and the normal to the boundary). Sometimes referred to as Snell-Descartes law, in its mathematical form.

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Answer:

B. Crest

Explanation:

The high point of a transverse wave is a called the crest.

Answer:

The total distance to be covered by the athletes is 800 m

The displacement of the athletes when they touch the finish line is zero.

Explanation:

Given;

Length of the track, L = 200m

the Length of the track for a single round = 200 m

(a) Distance is a scalar quantity which has only magnitude;

If the athletes were expected to take four rounds of the track, then the total distance = 4 x 200 m = 800 m

(b) Also, if  the line of finish was same as the line of start, then displacement of the athletes when they touch the finish line is zero (0 meters). This is because displacement has both magnitude and direction. Once the athlete returns to his starting point, his displacement at that point is zero.

Answer:

potassium and iodine

Explanation:

Comets are frozen leftovers from the formation of the solar system composed of dust, rock, and ice. Sun is a nearly perfect ball of hot plasma, heated to incandescence in its center by nuclear fusion reactions. Comets can be compared to the sun on the basis of size, composition, and position in the solar system.

The Sun is the central star of our Solar System. It's a nearly perfect ball of hot plasma, heated to incandescence in its center by nuclear fusion reactions.

Sun emits energy mostly as visible light, ultraviolet light, and infrared radiation. It is the most vital source of energy for life on Earth.

A comet is a tiny entity circling the Sun that contains a significant amount of volatile ices, which includes entrained dust particles.

The comet forms two tails, one of ionized molecules and radicals and the other of dust, as dust and gas in the coma flow freely into space.

Comets are frozen remnants of the solar system's origin, made of dust, rock, and ice.

They range in size from a few miles to tens of miles across, but as they get closer to the Sun, they heat up and spew gases and dust into a flaming head the size of a jet.

Hence comets can be compared to the sun on the basis of size, composition, and position in the solar system.

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The angle of refraction is a. 15°

Snell's law is described as “The ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant, for the light of a given colour and for the given team of media”.

By Snell's law:

η = sin i / sin r. i = 25, η = 1.6

1.6 = sin25° / sin r

sin r = sin25° / 1.6

= 0.4226/1.6= 0.2641

calculating

r = sin⁻¹( 0.2641 )

sin−1(0.264) is ≈ 15.3075

the angle of refraction is a. 15°

So the angle associated with the incidence and refraction can have a relation to the refractive index of the two mediums. Snell's First Law: It states that the incident ray, the refracted ray and the standard lie on the same plane.

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