Which statements represent convection? Select two options.

A. Black asphalt gets very hot on a sunny day.
B. The movement of air in a hot-air balloon makes it rise into the sky.
C. A dark sand beach can burn the soles of your feet.
D. A spoon gets warm from sitting in a soup pot.
E. A house has high heating bills because the heat ends up in the attic.
F. A house loses heat through an exterior wall.

The distance traveled by the box along the ramp is 0.51 m.

Apply the principle of conservation of energy;

Potential energy of the box at top of incline = Elastic potential energy at bottom

mgh = ¹/₂kx²

where;

h = L sinθ

where;

mg(L sinθ) = ¹/₂kx²

(18)(9.8)(L sin25) = ¹/₂(740)(0.32)²

74.55 L = 37.89

L = 37.89 / 74.55

L = 0.51 m

Thus, the distance traveled by the box along the ramp is 0.51 m.

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Answer:

FloodPlains

Explanation:

The floodplains mix with the dirt in the water in which then makes it brown. You're welcome:)

The floodplain is making the water brown in color.

In conclusion, the floodplain is making the water brown in color.

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Answer:

satisfaction, enjoyment and fair play

Answer:

It is important to be a good sport, and even if you do not win still be happy about being able to participate, and congratulate the person that did win.

Explanation:

Hope this helped Bye!

Answer:

a commutator

Explanation:

ANSWER:

(a) 1.88 m/s²

(b) 17.14 s

STEP-BY-STEP EXPLANATION:

Given:

Distance (d) = 276 m

Initial speed (u) = 0 m/s

Final speed (v) = 116 km/h

We convert from km/h to m/s, as follows:

(a)

We calculate the acceleration as follows:

(b)

Finally, we calculate the time, just like this:

Answer: A. An ice hockey player picks up a trophy as he slides past it

Explanation:

A PE X

The statement that best describes a perfectly inelastic collision is

C. A surfer falls off of his surfboard when a wave hits him.

A collision is the interaction between two bodies in such a way that the momentum and velocity of one body gets changed due to the presence of other body. There are three types of collision-

1. Elastic collision

2. Inelastic collision

3. Perfectly inelastic collision.

In all types of collision , the momentum of the system before collision and after collision always remains same or we can say that momentum is conserved in collisions

An elastic collision is the one in which kinetic energy is also conserved and coefficient of restitution is one. Both the bodies move separately with different velocities after elastic collision.

In inelastic collision  there is a loss of kinetic energy and coefficient of restitution is less than one.

In perfectly inelastic collision there is maximum loss of kinetic energy and coefficient of restitution is zero. Both the bodies stick together after collision and move with same velocity

Coefficient of restitution is the  ratio of  relative velocity of separation after collision to relative velocity of approach before collision.

A surfer falls of his surfboard when a wave hits him is an example of perfectly inelastic collision because in this when water hits the surfers he falls of and sticks to the water , and will also now move with the velocity of water .

So  when the surfer falls off his surfboard when a wave hits him is perfectly inelastic collision.

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This is a what do you think question.

(c) Total internal reflection occurs

when the incident angle is greater than the critical angle.

To find the capacitance of the capacitor, we can use the formula for reactance in an AC circuit:Reactance (X) = 1 / (2πfC)
In this case, the reactance is given as 80 ω and the resistance is 30 ω. The rms current is 2.0 A.First, let's calculate the total impedance of the circuit:

Impedance (Z) = √(Resistance^2 + Reactance^2)

Z = √(30^2 + 80^2)
Z = √(900 + 6400)
Z = √7300
Z ≈ 85.44 ω

Next, we can use Ohm's Law to calculate the total voltage in the circuit:

Voltage (V) = Current (I) * Impedance (Z)

V = 2.0 A * 85.44 ω
V ≈ 170.88 V

Now, we can rearrange the reactance formula to solve for capacitance:

C = 1 / (2πfX)

Substituting the given values:

C = 1 / (2π * 60 Hz * 80 ω)
C = 1 / (2π * 4800 ω)
C ≈ 3.31 x 10^(-5) F

Therefore, the capacitance of the capacitor is approximately 3.31 x 10^(-5) F.

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Answer:

See below ↓↓↓

Explanation:

1. C. Gas

2. B. Speed

3. A. Pascal

Answer:

30.38 is the correct answer

The acceleration that the same net force would give to an 18-kg tool is 13.3 m/s² (meters per second squared).

According to Newton's second law of motion, the acceleration of an object is directly proportional to the net force applied to it and inversely proportional to its mass.

Mathematically, this can be expressed as F = ma, where F is the net force, m is the mass, and a is the acceleration.

In the given scenario, the net force is accelerating a 4.8-kg tool at 40 m/s². To find the acceleration for an 18-kg tool, we can rearrange the equation to solve for a:

a = F/m

Substituting the values, we have:

a = (F)/(18 kg) = (40 m/s²)/(18 kg) = 2.22 m/s²

Therefore, the net force would give an acceleration of 2.22 m/s² to an 18-kg tool.

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Answer:

vhijko and eye rudiieidjdjddjjd

Explanation:

jdjdjdjdjfjofkd ruudoeksowkosksd and nkdeondjvndkxnfuvjfk

Answer:

Answer is 331.5 m/s

Explanation:

This is done by using the equation wave speed = wavelength x frequency.

On a day when the wavelength of a 1500 Hz frequency is 0.221 meters, the speed of sound is about 331.5 meters per second.

The air's humidity, pressure, and temperature all affect how quickly sound travels through it. To get the sound speed in air, use the following formula:

v = f * λ

where the sound wave's wavelength, frequency, and speed are represented by the letters v, f, and.

Frequency times wavelength equals sound speed.

We may enter these numbers into the formula: where the wavelength is 0.221 m and the frequency is 1500 Hz.

Speed of sound = 1500 Hz x 0.221 m

Speed of sound = 331.5 m/s.

Therefore, the speed of sound on the given day is approximately 331.5 meters per second.

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Answer:

Electrical energy is caused by moving electric charges called electrons. The faster the charges move, the more electrical energy they carry. As the charges that cause the energy are moving, electrical energy is a form of kinetic energy.

Explanation:

Answer:

The bullet was 0.52 seconds in the air.

Explanation:

Horizontal Motion

It occurs when an object is thrown horizontally with a speed v from a height h.

The object describes a curved path ruled exclusively by gravity until it hits the ground.

To calculate the time the object takes to hit the ground, we use the following equation:

\(\displaystyle t=\sqrt{\frac{2y}{g}}\)

Note it doesn't depend on the initial velocity but on the height.

The bullet is fired horizontally at h=1.3 m, thus:

\(\displaystyle t=\sqrt{\frac{2\cdot 1.3}{9.8}}\)

\(\displaystyle t=\sqrt{\frac{2.6}{9.8}}\)

t = 0.52 s

The bullet was 0.52 seconds in the air.

Any substance on this earth is directly dependent on the gravitational force. The bullet fired horizontally will also faced the gravitational pull force.

To calculate the time the object takes to hit the ground, we use the following equation:-

\(t=\sqrt\frac{2y}{g}\)

The bullet is travelling in the air hence it does not depend on the velocity bt the mass. The height taken by the bullet is h=1.3m.

After putting the value to the equation, the answer will be as follows:-

\(t=\sqrt\frac{2*1.3}{9.8}\)

After solving the equation the value of time is 0.52 seconds

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Explanation:

hope this may help you

have a nice day

Answer:

I say that the answer is D all of the above hope this helps ‍♂️

Answer:

formula

Explanation:

Answer:

It would 110

Explanation:

It is only because of a división leading you into a

Density is the mass per unit volume of any object. It is calculated by dividing the mass of an object by its volume. This is:

ρ = m/V

ρ = 4.05 g  / 12 mL

ρ = 0.3375 g/mL

OPTION A

Answer:

Potential difference, V = -0.000224 Volts

Explanation:

Given the following data;

Quantity of charge = 6.93*10-4 C

Energy = -3.09 J

To find the electric potential V at that point?

Mathematically, the energy transferred per unit of charge is given by the formula;

E = QV

Where:

E is the energy

Q is the quantity of charge

V is the potential difference.

Substituting into the formula, we have;

\( -3.09 = 6.93*10^{-4} * V \)

\( V = \frac {6.93*10^{-4}}{-3.09} \)

Potential difference, V = -0.000224 Volts

In one year, the Earth travels approximately 584 million miles (940 million kilometers) around the Sun. This distance is known as the Earth's orbital circumference or its annual orbit.

The Earth follows an elliptical path around the Sun, with the Sun located at one of the foci of the ellipse. The average distance between the Earth and the Sun is about 93 million miles (150 million kilometers), known as an astronomical unit (AU).

To calculate the distance traveled, we need to consider that the Earth's orbit is not a perfect circle but rather an ellipse. Therefore, the distance traveled varies throughout the year. The Earth's speed is not constant either, as it follows Kepler's laws of planetary motion.

By using Kepler's second law, which states that the line connecting the Earth to the Sun sweeps out equal areas in equal times, and the average distance of 93 million miles, we can estimate the Earth's total distance traveled in one year to be approximately 584 million miles.

It's important to note that this value is an approximation, as factors such as the gravitational influences of other celestial bodies can cause slight variations in the Earth's orbit.

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Answer:

9 meters

Explanation:

Assuming this question is asking for the change in position, the way to approach such a problem is multiplying VELOCITY by TIME when velocity is constant.

Velocity = 3 m/s, Time = 3s.

3m/s * 3s = 9m

Like contour lines, thick lines are used to define solid objects or boundaries.

Contour lines are typically used in drawing or painting to show the outline or shape of an object, and they can also be used to convey depth or distance. These lines are often referred to as tranches, highs, or horizontal highs. On the map this line connects places that are very high and a ground level on the map.

Thick lines are often used in technical drawings, such as architectural or engineering plans, to show the boundaries of an object or space. This line is used to carry out the creation of outlines, drawing lines and also real lines. Both types of lines are important tools for artists and designers, as they help to create a sense of structure and form in a composition.

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The velocity vs displacement curve will be a parabolic graph and the height attained by object B will be lesser than object A.

Velocity is the change in displacement of an object with the change in time. It is a vector quantity because it has both magnitude and direction. The SI unit of velocity is meter per second (m/s).

u = 0

x₀ = Distance travessed by both the discs

F= constant

f = 0

a) (F-f) = ma

a = F/ m

v² = u² + 20x

v² = 0 + (2F/m)x

v = \(\sqrt{(2f/m)x}\)

v v/s x curve will be similar to parabolic graph of v² = (2f/ m)x

b) Energy would be conserved for both.

Since, velocity gained by both is same as Vi = \(\sqrt{(F/m)Xo}\)

-mgh = 1/2mvf² - 1 mvi² = - 1 mvi²

mgh = 1/2mvi² = FXo/2m  (Since, vf = 0)

So, h = (FXo/ 2mg)

Since, mb > ma

Hb < Ha

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Explanation:

i think this is the answer

Answer:

Tyler got to his destination first. It took him 4.5 hours

Explanation:

Tyler's trip: 36 / 8 = 4.5 hrs

Mark's trip: 48 / 10 = 4.8 hrs