can
you please answer these few multiple choice questions! thank you.
Question 20 (1 point) 4) Listen What must be your average speed in order to travel 350 km in 5.15 h? 1) 0.015 km/h 2) 17.0 km/h 3) 68.0 km/h 4) 156.0 km/h
Question 25 (1 point) 4) Listen A car goes f

Answer:

For, heating purposes more the quantity of  water more will be the heating. Clearly, underground heating would have more water and hence, it will have edge over the  water heater system.

Moreover, for things at the same temperature, the thing with more molecules has more total kinetic energy (thermal energy) than the thing with fewer molecules. The groundwater heating system uses heat from the heat stored naturally in groundwater or aquifers. Thus, saving the cost of power required to heat in normal water heater.

Explanation:

The groundwater heating system will warm the school more than the water heater system due to the fact that it uses more water more than the other system.

Based on the complete question, it should be noted that the addition of energy leads to an increase in motion which results in the rise in temperature.

The groundwater heating system will warm the school more than the water heater system due to the fact that it uses more water more than the other system even though its water isn't as warm as in the other system.

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This is the same height as the clown, so if he looks up at the mirror from the floor he should be able to see his feet reflected in the mirror.

Mirror is a reflective surface, typically of glass, which displays images of objects placed in front of it. Mirrors are used in a variety of different applications, including personal grooming, decoration, interior design, viewing art, scientific uses, and more. A mirror is composed of a flat, smooth surface that reflects light in a specific direction. This reflection is what produces the image we see in the mirror. The reflective surface is usually made of glass, although other materials such as metal, plastic, and wood can also be used. Mirrors can be manufactured in a variety of shapes and sizes, from small hand-held makeup mirrors to large wall-mounted mirrors. Some mirrors are also designed with special coatings or treatments to enhance their reflective properties.

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Answer:

I may be special but I think 400

Explanation:

Answer:

Distance: 400 m

Displacement: 0 m

Explanation:

Distance: an amount of space between two points

Displacement: the change in position between two distinct points

The Big Bang Theory proposes that the universe began as a singularity, an infinitely small, dense and hot point, approximately 13.8 billion years ago.

The universe then rapidly expanded and cooled down, allowing particles to combine and form the first atoms, mostly hydrogen and helium.

The Big Bang Theory is supported by several observations, including the cosmic microwave background radiation, which is a remnant of the hot and dense early universe, and the observed abundance of light elements such as hydrogen and helium. It also explains the observed redshift of light from distant galaxies, which is consistent with the universe expanding from a single point.

The theory has been refined and expanded over time to incorporate new observations and discoveries, but the core idea of the universe starting from a singularity and expanding continues to be the most widely accepted explanation of the origin of the universe.

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The wave velocity is found to be v = w/k.

The velocity associated with the disturbance propagating in the given medium is defined as wave velocity; in other words, wave velocity is the distance traveled by waves per unit of time.

The wave velocity is determined by the medium employed.

The wave velocity is often referred to as the phase velocity.

The perturbations in wave motion pass across the medium as a result of the particles' recurrent periodic oscillations. The velocity of the wave will differ from the velocity with which the particles vibrate about their mean positions. The wave velocity will always be constant, while the particle velocity will vary over time.

Given that

E = E₀ sin(kx-wt)j

B = B₀ sin(kx-wt)j

E₀ - Amplitude of electric field

B₀ - Amplitude of magnetic field

and k = 2π/λ

λ = 2π/k

and w = 2πn

where n is the angular frequency

Thus, the velocity of the wave

v= nλ

v = (w/2π) (2π/k)

v = w/k

Thus, the velocity of the wave is v = w/k.

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To find the x and y coordinates of the center of mass for the system of these three objects, we need to calculate the weighted average of the x and y coordinates of each individual object.

First, let's label the objects:
- Pipe wrench: mass = 2.3 kg
- Hatchet: mass = 1.5 kg
- Hammer: mass = 1.0 kg

Next, let's denote the x and y coordinates of each object's center of mass on the graph:
- Pipe wrench: (x1, y1)
- Hatchet: (x2, y2)
- Hammer: (x3, y3)

To calculate the x coordinate of the center of mass (x_cm), we use the formula:
x_cm = (m1*x1 + m2*x2 + m3*x3) / (m1 + m2 + m3)

Substituting the given values, we get:
x_cm = (2.3*x1 + 1.5*x2 + 1.0*x3) / (2.3 + 1.5 + 1.0)

Similarly, to calculate the y coordinate of the center of mass (y_cm), we use the formula:
y_cm = (m1*y1 + m2*y2 + m3*y3) / (m1 + m2 + m3)

Substituting the given values, we get:
y_cm = (2.3*y1 + 1.5*y2 + 1.0*y3) / (2.3 + 1.5 + 1.0)

By plugging in the specific x and y coordinates for each object, you can calculate the x_cm and y_cm values for the system of these three objects.

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From the mole ratio of reactants and products, he will make 10 g of AB

The mole ratio of reacting substances gives the ratio in which moles of the reactants will combine to give products.

The equation of the reaction is given below:

If he added 10 g of substance A and 45 g of substance B, he would make only 10 g of AB according to the mole ratio.

Therefore, from the mole ratio of reactants and products, he will make 10 g of AB

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Answer:

From the mole ratio of reactants and products, he will make 55g of AB

Explanation:

D

Answer:

it is very hard but i am trying to help you.

Explanation:

The coefficient of friction is 0.15. Neglecting collar friction,  the torque required to lower the load: 1.7 N.m. The correct option is a.

The torque required to lower the load using the power screw is given by the formula,

T = π/2 (dm^2 /2 + df^2 /2) * f * µ

Where, dm = Mean diameter of screw = 25.5

mmdf = Major diameter of screw = 28

mmf = Load = 800 N

µ = Coefficient of friction = 0.15

l = lead of the screw = 5 mmπ = 3.14

Substitute the values in the formula,

T = π/2 (25.5^2/2 + 28^2/2) * 800 * 0.15 * 5/1000= 1.7 N.m

Therefore, the most nearly the torque required to lower the load is 1.7 N.m. The correct option is a.

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The strength of the magnetic field required to exactly balance the weight of the proton and keep it moving horizontally is 0.0414 T.

To balance the weight of the proton and keep it moving horizontally, we need to apply a magnetic field with a strength equal to the gravitational force acting on the proton.

The force experienced by a charged particle moving in a magnetic field is given by the formula:

F = q * v * B

where:

F is the magnetic force,

q is the charge of the particle,

v is the velocity of the particle, and

B is the magnetic field strength.

The weight of the proton is given by the formula:

Weight = mass * acceleration due to gravity

Since the proton is moving horizontally, the gravitational force is balanced by the magnetic force. Therefore:

F = Weight

q * v * B = mass * acceleration due to gravity

Given the following constants:

charge of a proton (q) = 1.6 x 10⁻¹⁹ C,

mass of a proton (mass) = 1.67 x 10⁻²⁷ kg

acceleration due to gravity (g) = 9.8 m/s².

Substituting the known values into the equation, we can solve for the magnetic field strength (B):

B = (mass * gravitational acceleration) / (q * v)

B = (1.67 x 10⁻²⁷ kg * 9.8 m/s²) / (1.6 x 10⁻¹⁹ C * 2.50 x 10⁶ m/s)

B = 0.0414 T

Therefore, the strength of the magnetic field required to exactly balance the weight of the proton and keep it moving horizontally is approximately 0.0414 Tesla (T).

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Answer:

Vp = 66.67 [mi/h]

Explanation:

To solve this type of problem we must remember that speed is defined as the relationship of space between time.

speed = distance/time

7)

v = speed = 100 [km/h]

distance = 750 [km]

time = distance/speed

time = 750/100

t = 7.5 [h]

8)

v1 = 200/3 = 66.67[mi/h]

v2 = 100/1.5 = 66.67 [mi/h]

Vp = average speed = (v1+v2/2)

Vp = (66.67 + 66.67)/2

Vp = 66.67 [mi/h]

answer is 9 Billion due to the decrease in Cactus

Answer:

Yes, a mixture can be made up of just elements and no compounds. The elements never experiance a chemical interaction and stay only in physical contact with each other.

BRAILIEST PLS I NEED LEVEL UP!

Answer: c

Explanation:

The total distance the ultrasound pulse travelled is, twice the distance of the sea floor

Because it went back and forth

Answer:

Real Image

Explanation:

Images which are formed on the screen by the actual intersection of light rays are called real images.

Answer:

Explanation:

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The interior zones of the Sun are distinguished by differences in temperature, density, and nuclear processes.

The interior of the Sun can be divided into several distinct zones based on variations in temperature, density, and the dominant nuclear processes taking place within each zone.

1. Core: The core is the central region where nuclear fusion occurs. It is characterized by extremely high temperatures and densities. The core is the hottest and densest part of the Sun, and it is where hydrogen nuclei undergo nuclear fusion to form helium, releasing a vast amount of energy in the process.

2. Radiative Zone: Surrounding the core is the radiative zone, which is primarily responsible for the transport of energy through radiation. In this zone, photons of energy are repeatedly absorbed and re-emitted as they make their way outward, gradually transferring heat towards the surface.

3. Convective Zone: Beyond the radiative zone lies the convective zone. In this region, energy transport occurs through convection, where hot plasma rises and cooler plasma sinks. Large-scale convection cells carry heat towards the surface, creating the visible granulation patterns seen on the Sun's photosphere.

The distinct interior zones of the Sun are defined by these variations in temperature, density, and the mechanisms of energy transport and nuclear processes occurring within each zone.

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Answer:

Duck to avoid the ball and dodge the rhino’s attack and then try and climb the nearest tree. Hope that helps.

Explanation:

For me I’d say it’d be instinct for the answer.

Answer:

. tt tt t t t t t t tt t tt t t jk j k j k j k j k jk k j k jk

Answer:

Explanation:

And the condition of problem N 6 ???

magnetic force

gravitational force

electrostatic force

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Explain why "selectively permeable" is a good way to describe a cell membrane.

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The plasma membrane is called a selectively permeable membrane as it permits the movement of only certain molecules in and out of the cells. Not all molecules are free to diffuse. If plasma membrane ruptures or breaks down then molecules of some substances will freely move in and out of the cells.

As the plasma membrane acts as a mechanical barrier, the exchange of material from its surroundings through osmosis or diffusion in a cell won’t take place. Consequently, the cell would die due to the disappearance of the protoplasmic material. It allows hydrophobic molecules and small polar molecules diffuse through the lipid layer, but does not allow ions and large polar molecules cannot diffuse through the membrane.

Answer:

0.2 Hz

Explanation:

f = v / λ.

Where f = frequency,

v = velocity/speed,

λ = wavelength.

f = v / λ →

f = 2.2m/s / 11 m

f = 2.2 / 11 [1 / s]

f = 1 / 5 [Hz]

f = 0.2 Hz

Answer:

In both scenarios the speed would increase

Answer:

What would happen to the speed of a sound wave if it moved from ocean water to air?

✔ It would slow down.

What would happen to the speed of a sound wave if it moved from a cooler room to a warmer one?

✔ It would speed up.

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For you to feel pressure on your skin, mechanoreceptor neurons are required.

The Pacinian corpuscles Pacinian corpuscles, like the ones shown in the bright field light microscopy image, are sensitive to pressure (touch) and high-frequency vibration.

Mechanoreceptors are sensitive to many physical alterations, including as touch, pressure, vibration, and stretch.

These sensors are capable of picking up feelings like pressure, vibration, and texture. Meissner's corpuscles, Pacinian corpuscles, Ruffini's corpuscles, and Merkel's disks are the four types of known mechanoreceptors whose sole purpose is to detect indentations and vibrations of the skin.

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The two types of potential energies which would be types of mechanical energies are elastic and gravitational.

The correct answer choice is option D

Potential energy means the energy a body possess in relation to its position. Other forms of energy include

Kinetic energy is the energy a body possesses due to its motion.

So therefore, the two types of potential energies which would be types of mechanical energies are elastic and gravitational. The correct answer choice is option D

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Answer: it is d

Explanation: i took the unit test on edge

Answer: Thermal expansion is the tendency of matter to change its shape, area, volume, and density in response to a change in temperature, usually not including phase transitions.

Explanation:

Answer:

I believe the answer is c I believe not a 100% sure on this one.

Explanation:

Thermal expansion, the general increase in the volume of a material as its temperature is increased. ...

The basketball should be thrown to a height of 8m

The mass of the ball, m = 2kg

Potential Energy = 160J

The formula for Potential Energy is:

Potential Energy = mgh

where g = 10m/s²

To find the height, h, substitute Potential Energy = 160J, m = 2kg, and g = 10m/s² into the given formula:

160 = 2 x 10 x h

160 = 20h

h = 160/20

h = 8m

The basketball should be thrown to a height of 8m

Answer:

They are made of one type of atom.

Explanation:

Answer:

The answer is A

Explanation:

The formula for energy of a photon in terms of its wavelength, Planck's constant, and the speed of light is:

E = (hc)/λ

We can use dimensional analysis to derive the formula for energy of a photon in terms of its wavelength, Planck's constant, and the speed of light.

A photon's energy can be written as:

E = f × h

where

f is the frequency of the photon and h is Planck's constant.

We know that the frequency of a photon is related to its wavelength and the speed of light by the following equation:

f = c/λ

where c is the speed of light and λ is the wavelength.

Substituting this expression for f into the equation for energy, we get:

E = (c/λ) × h

Now let's check the dimensions of each term in this expression using brackets [] to represent dimensions:

[c/λ] = [L/T] / [L] =\([T^{-1} ]\)

[h] = [\(M L^2 T^{-1}\)]

Therefore, the dimensions of the product (c/λ) × h are:

\([T^{-1} ] \times [M L^2 T^{-1} ] = [M L^2 T^{-2} ]\)

This is the dimension of energy (which can be expressed as\([M L^2 T^{-2} ]).\)

Therefore, we can conclude that the formula for energy of a photon in terms of its wavelength, Planck's constant, and the speed of light is:

E = (hc)/λ

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Answer:

True

Explanation: