What is the definition of endothermic and exothermic?


pls help on a timer will give brainlist

Answer: the material that is most likely to get the warmest when placed in the Sun is yellow pebbles. Therefore correct option is D.

Explanation:

The material that is most likely to get the warmest when placed in the Sun is D) yellow pebbles.

This is because the color of a material affects how much sunlight it absorbs. Darker colors tend to absorb more light and heat than lighter colors, which reflect more light. Yellow is a relatively dark color, so yellow pebbles will absorb more sunlight and get warmer than the other options.

White cement and beige sand are lighter colors, so they will reflect more sunlight and absorb less heat. Brown mulch is a darker color than cement and sand, but still not as dark as yellow pebbles, so it will absorb less sunlight and heat than yellow pebbles.

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The total angular distance performed in 1 curl can be determined by subtracting the initial position of the knee joint from the final position of the knee joint. This is because angular distance is the difference in the initial and final angles of the knee joint.

Therefore, the formula to calculate the total angular distance of Zach Ziegler in one hamstring curl is: Total angular distance = Final angle – Initial angle

Here, the relative angle at his knee changes from 0 degrees (straight leg) to 130 degrees of knee flexion and back to 0 degrees when doing 1 hamstring curl. So, the initial angle is 0 degrees and the final angle is also 0 degrees. This means that the total angular distance performed in 1 curl is:

Total angular distance = 0 degrees – 130 degrees + 0 degrees

Total angular distance = -130 degrees

Therefore, the total angular distance performed in one curl is 130 degrees.

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Answer:

distance- I think it is 6 then the displacement is 13.41

Explanation:

The volume flow rate through the hose and nozzle is 0.339 l/s, the speed of the water in the nozzle is approximately 9.058 m/s.

To calculate the speed of the water in the nozzle, we can use the principle of continuity, which states that the volume flow rate is constant at any point along a pipe or hose.

The equation for the principle of continuity is given by A₁v₁ = A₂v₂, where A₁ and A₂ are the cross-sectional areas of the hose and nozzle, and v₁ and v₂ are the velocities of the water in the hose and nozzle, respectively.

First, we need to convert the given volume flow rate from liters per second to cubic meters per second, which gives us 0.339 × 10⁻³ m³/s.

Next, we can calculate the cross-sectional areas of the hose and nozzle using the given radii. The area of a circle is given by the formula A = πr².

For the hose, A₁ = π(0.01878 m)² and for the nozzle, A₂ = π(0.00595 m)².

Using the principle of continuity, we can rearrange the equation to solve for v₂: v₂ = (A₁v₁) / A₂.

Substituting the known values, we find v₂ ≈ (π(0.01878 m)² × 0.339 × 10⁻³ m³/s) / (π(0.00595 m)²).

Simplifying the equation, we get v₂ ≈ 9.058 m/s. Therefore, the speed of the water in the nozzle is approximately 9.058 m/s.

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Answer:800

Explanation:about

The gas law that describes the pressure changes that occur during pulmonary ventilation is Boyle's law. Boyle's law states that, at a constant temperature, the pressure of a gas is inversely proportional to its volume.

During pulmonary ventilation, the process of breathing, the volume of the thoracic cavity changes, leading to pressure changes in the lungs. When the diaphragm and intercostal muscles contract, the thoracic cavity expands, increasing its volume.

As a result, the pressure inside the lungs decreases, creating a pressure gradient between the lungs and the external environment. Air flows from an area of higher pressure (outside the body) to an area of lower pressure (inside the lungs), allowing for inhalation.

Conversely, during exhalation, the diaphragm and intercostal muscles relax, causing the thoracic cavity to decrease in volume. This results in an increase in pressure inside the lungs, causing air to flow out of the lungs and back into the external environment.

Boyle's law helps explain the relationship between volume and pressure changes that occur during pulmonary ventilation, enabling the process of inhalation and exhalation.

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False. When monochromatic light passes through two narrowly spaced slits, there will not always be a region of constructive interference on the viewing screen directly between the slits.

The phenomenon of interference occurs when waves from different sources or different parts of the same wavefront superpose and interfere with each other. In the case of two slits, when monochromatic light passes through them, it creates an interference pattern on a viewing screen placed behind the slits.

In an interference pattern, there are alternating bright and dark fringes. The bright fringes occur due to constructive interference, where the peaks of the waves from each slit align, resulting in an increased intensity of light. The dark fringes, on the other hand, occur due to destructive interference, where the peaks of one wave align with the troughs of another wave, resulting in a cancellation of light.

Between the two slits, there is a central bright fringe known as the central maximum. However, it is important to note that not all regions between the slits exhibit constructive interference.

The interference pattern depends on factors such as the distance between the slits, the wavelength of the light, and the angle of observation. In some cases, there may be dark fringes or regions of destructive interference between the slits on the viewing screen.

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The vertical and horizontal distance of a projectile will be equal if the angle of projection is 45 degrees.

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Explanation:

sorry_______________

Answer:

h = 0.25 [m]

v = 3.26 [m/s]

Explanation:

In order to solve this problem, we must remember that mechanical energy is defined as the sum of kinetic energy plus potential energy.

E1 = Ek + Ep

where:

E1 = mechanical energy = 25 [J]

Ek = kinetic energy = 17 [J]

Ep = potential energy [J]

25 = 17 + Ep

Ep = 8 [J]

Now the potential energy is defined by the following equation:

Ep = m*g*h

where:

m = mass = 3.2 [kg]

g = gravity acceleration = 9.81 [m/s²]

h = elevation [m]

8 = 3.2*9.81*h

h = 0.25 [m]

The velocity can be calculated by means of kinetic energy.

\(E_{k} =\frac{1}{2} *m*v^{2}\\17 =\frac{1}{2} *3.2*v^{2} \\v= \sqrt{\frac{17*2}{3.2} }\\v = 3.26[m/s]\)

(a) The height of the ball will be h=0.25 m

(b) The speed of the ball will be \(V= 3.26\ \frac{m}{s}\)

It is given that

Mass of the ball m=-3.2kg

The kinetic energy of the ball = 17 j

The total mechanical energy of the ball = 25 J

(a) So the total mechanical energy is the sum of the kinetic energy of the ball and the potential energy of the ball.

\(E_T=E_{KE}+E_{PE}\)

Now putting the values of the KE and the Total energy we get

\(25=17+E_{PE}\)

\(E_{PE}=8 \ J\)

Now the formula of the potential energy will be

\(E_{PE}=mgh\)

\(8=3.2\times 9.81 \times h\)

\(h= \dfrac{8}{3.2\times 9.81}\)

\(h=0.25\ m\)

(b) Now to find out the speed of the ball we have

\(E_K=17\ J\)

\(E_K=\dfrac{1}{2} mv^2\)

\(v=\sqrt{\dfrac{2E_{KE}}{m} }\)

\(v=\sqrt{ \dfrac{2\times17}{3.2} }=3.25\)

\(v=3.25 \ \dfrac{m}{s}\)

So the calculated answers will be

(a) The height of the ball will be h=0.25 m

(b) The speed of the ball will be \(V= 3.26\ \frac{m}{s}\)

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Answer:

a.25J

Explanation:

m=0.5kg

g=10

h=5

potential energy=m×g×h

=0.5×10×5

=25J

Answer:

Knowing the moon weighs approximately 7x10^22 kg and is orbiting at 1 km/s, it would take roughly 7x10^25 joules to slow its orbit down enough to crash it into earth.

Explanation:

Deceleration with steady pace way equilibrium of forces is WB/WA. Write equations by Newton's second law for the scenario with cat is -g(WB/(WA+ WB)).

A) Deceleration with steady pace way equilibrium of forces:

B:WB=T,

A:T=μN=μWA.

​μ= T/WA= WB/WA.

B) Write equations by using Newton's 2nd regulation for the scenario with cat:

B:T−WB =−(WB/g)a,

A:T−2μWA = (WA/g)a.

T = WB - (WB/g)a,

WB - (WB/g)a - 2(WB/WA)WA = (WA/g)a,

a(WA/g + WB/g)= -WB,

a=-g(WB/(WA+ WB)).

Deceleration refers to the act of slowing down or reducing speed. It is the opposite of acceleration, which is the increase in speed or velocity. Deceleration can occur in various contexts, including physics, engineering, and daily life.

In physics, deceleration is the rate at which an object slows down or changes its direction. It is measured in meters per second squared (m/s^2) or feet per second squared (ft/s^2). Deceleration is caused by forces such as friction, air resistance, or braking. In engineering, deceleration is an important factor in the design and safety of vehicles and machines. Proper deceleration systems, such as brakes or airbags, are essential to prevent accidents and protect occupants.

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Complete Question: -

Consider the system shown in the figure. Block A has a weight and block B has a weight . Once block B is set into downward motion, it descends at a constant speed.

a) Calculate the coefficient of kinetic friction between block A and the tabletop.

b) A cat, also of weight , falls asleep on top of block A. If block B is now set into downward motion, what is its acceleration (magnitude and direction)?

Any action intended to hurt, harm, or cause suffering to another living thing or group of beings is considered to be aggressive.

Specifically, acts that injure someone physically. action that harms psychological health, such as that which instills apprehension, concern, or anguish.When you hurt your brother, you also hurt him. One way to damage someone is to hurt them physically.

People who are distressed could also believe that they are unable to handle or cope with alterations brought on by everyday activities or medical conditions like cancer. It is unfavourable, unhealthy, and discouraging. Stressors events that trigger the stress reaction in our bodies. A stressor is anything that creates stress.

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Answer:

The answer iis true

Explanation:

It is much easier to carry your backpack when it is empty rather than when it's full of textbooks (or soaked from the rain).

The wavelength of the wave as we have it is 3m

A wave's wavelength is the separation between two successive locations on the wave that are in phase, or at the same stage of their cycle. In other terms, it is the separation between two wave crests or troughs.

We know that the wavelength = Number of crests = 3m

Wave speed = 3 m/s

We would then have that;

v = λf

v = wave speed

f = frequency

λ = wavelength

Thus since there are three crests then the wavelength must be 3m

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The time taken to move 6.23 m is approximately 1.19 seconds. The particle's final velocity is 8.06 m/s.

Initial velocity (u) = 2.19 m/s

Acceleration (a) = 4.88 m/s²

Distance (s) = 6.23 m

To find:Time taken (t) = ?

We know, v² = u² + 2as

Where,v = final velocity = ?

u = initial velocity = 2.19 m/s

a = acceleration = 4.88 m/s²

s = distance = 6.23 m

Let's find the final velocity,v² = u² + 2as

v² = (2.19)² + 2(4.88)(6.23)

v² = 4.7961 + 60.3248

v² = 65.1209

v = √65.1209

v ≈ 8.06 m/s

So, the final velocity of the particle is approximately 8.06 m/s.

a) Now, let's find the time taken,t = (v - u) / at

t = (8.06 - 2.19) / (4.88)

t ≈ 1.19 s

Therefore, the time taken to move 6.23 m is approximately 1.19 seconds.

b) The particle's final velocity is 8.06 m/s.

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Answer:

Below

Explanation:

1. Everest

2. Godwin Austen

3. Kangchenjunga

4. Lhotse

5. Makalu

6. Cho Oyu

7. Dhaulagiri

8. Manaslu

9. Nanga Parbat

10. Annapurna

Sorry I don't know anything about their types :(

I hope this helps you :)

Answer:

the 10 tallest mountains are Mount Everest, K2, Kangchenjunga, Lhotse, Makalu, Cho Oyu, Dhaulagiri, Manaslu, Nanga Parbat, and finally annapurna 1 and they are all fold

Explanation:

they are all in the himalayas And the Himalayan mountains are all folded mountains I think

Pierre Charles L'Enfant was an inventor and architect who is best known for designing the city plan of Washington, D.C., the capital of the United States.

An inventor is a person who creates new and useful ideas or devices that are often innovative and novel. Inventors can work in a wide range of fields, from technology and engineering to medicine and the arts. Their ideas and inventions can be revolutionary and can have a significant impact on society and the economy. The process of inventing typically involves identifying a problem or need, and then developing and testing a solution or device to address that problem. Inventors may work alone or as part of a team, and they may collaborate with other professionals, such as engineers, scientists, or designers, to bring their ideas to fruition.

Here,

L'Enfant was born in France in 1754 and received his training as an engineer and military officer. He served in the Continental Army during the American Revolution and later worked as a city planner and surveyor.

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Answer:

See below

Explanation:

Coulomb's Law    Force = k q1 q2 / r^2

k = Coulomb's constant = 8.9875517 x 10^9  kg m^3 /s^2 C^2

    Force =  8.9875517 x 10^9   * 7 * 5  / (5925^2)  = 8960.5102 N

which determines whether an atom will receive, lose, and share electrons with other atoms in order to become stable.

The outside of the nucleus is surrounded by electrons, which are negatively charged particles. Scientists may have trouble observing them since they rotate so quickly. The tiniest particles in an atom, with 2000 of them fitting into a proton, they are drawn to the protons' positive charge.

Why do electrons matter so much?

In addition to participating in gravitational, electromagnetic, and weak interactions, electrons are crucial for a variety of physical processes, including electricity, magnetism, chemistry, and thermal conductivity.

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The kangaroo's horizontal speed will be 9.7 m/s and its departure speed will indeed be 10.65 m/s.

By observing the pace at which this compressed region moves through the medium, we may determine the sound speed. The sound wave travels at a speed of around 343 meters per second in low humidity at 20 degrees Celsius.

The following equation relates the distance to the direction and initial velocity:

d = [v₀²sin2θ]/g, where θ – the angle of the jump.

Thus, v₀² = gd / (sin2θ) = (9.8×8)/0.69 = 113.62

v₀ = 10.65 m/s ( the take off speed).

The horizontal velocity equals:

vₓ = v₀cos 22° = 10.65 m/s × 0.92 = 9.7 m/s

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The change  in momentum is 435.6 Kgm/s

Newton's second law of motion states that the rate of change of momentum of an object is directly proportional to the force applied, and the change in momentum takes place in the direction of the applied force.

The mathematical expression of Newton's second law is as follows:

F = dp/dt

where F is the force applied on the object, p is the momentum of the object, and t is time. dp/dt represents the rate of change of momentum over time.

From this equation, we can see that the change in momentum (Δp) of an object due to a force is equal to the product of the force (F) and the time (Δt) over which the force is applied:

Δp = F Δt

From Newton's law;

Ft = mv - mu

Where mv - mu = Δp or change in momentum

Then;

Ft = 48.4 * 9 = 435.6 Kgm/s

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An adiabatic process is one in which the heat exchanged with the surroundings is zero.

In an adiabatic process, there is no transfer of heat between the system and its surroundings. This means that the system is thermally isolated, and there is no heat flow into or out of the system. As a result, the temperature of the system can change due to internal energy conversion, but there is no heat exchange with the surroundings.

In contrast, a non-adiabatic process involves heat transfer between the system and its surroundings. This can occur through conduction, convection, or radiation. The heat exchanged during a non-adiabatic process can cause changes in temperature, pressure, or other properties of the system.

The defining characteristic of an adiabatic process is the absence of heat exchange with the surroundings. This allows for the examination of changes in temperature, pressure, and other thermodynamic properties solely based on work done on or by the system. Adiabatic processes are commonly encountered in various fields, such as thermodynamics, meteorology, and engineering.

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At point P the magnetic field due to a long straight wire carrying a current of 2.0 A is 1.2 µT is  \(1.67 * 10^6 meters\)

To determine the distance between point P and the wire carrying the current, we can use the formula for the magnetic field created by a long straight wire. The formula is given by:

B = (μ₀ * I) / (2π * r)

Where:

B is the magnetic field strength, Μ₀ is the permeability of free space , I is the current in the wire, and R is the distance from the wire.

Given:

B = 1.2 µT = 1.2 × \(1.2 * 10^{-6}\) T

I = 2.0 A

Μ₀ = 4π × \(10^-7\) T·m/A

We can rearrange the formula to solve for the distance r:

R = (μ₀ * I) / (2π * B)

Substituting the given values:

R = (4π × \(10^{-7}\) T·m/A * 2.0 A) / (2π * \(1.2 * 10^{-6}\) T)

The units of T·m/A cancel out, and we are left with:

R = (2.0) / (\(1.2 * 10^{-6}\))

Simplifying:

R = \(1.2 * 10^{-6}\) meters

Therefore, point P is approximately \(1.67 * 10^6\) meters (or 1.67 kilometers) away from the wire carrying the current.

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Answer:

A)    Net force in the horizontal direction is 19.641 N

B)    Net force in the vertical direction is 20 N

Explanation:

The normal force (20 N) and the weight force (20 N) cancel out.

Next lets find the horizontal and vertical components on the right side of the diagram.

We are given the angle and the hypotenuse.

First lets find the opposite side (vertical component).

\(sin(x)\frac{O}{H}\)

\(O=Hsin(x)\)

\(O=40sin(30)\)

\(O=20\)

Now lets find the adjacent side (horizontal component).

\(cos(x)=\frac{A}{H}\)

\(A=Hcos(x)\)

\(A=40cos(30)\)

\(A=34.641\)

Now we can ignore the 40 N force.

We are left with 1 force in the vertical direction.

So the net force in the vertical direction is 20 N

We are left with 2 forces in the horizontal direction.

We have 1 force of 15 Newtons moving in the left direction.

We also another force of 34.641 Newtons moving to the right.

So the net force in the horizontal direction is 19.641 N.