A 2.0-kg block of wood is on a level surface where μs and μk = 0.60. A 13.7-N force is being applied to the block parallel to the surface.


a. If the block was originally at rest, then

1. it will remain at rest, and the force of friction will be about 15.7 N.

2. it will remain at rest, and the force of friction will be about 13.7 N.

3. it will remain at rest, and the force of friction will be 11.8 N.

4. it will begin to slide with a net force of about 1.9 acting on the block.


b. If the block was originally in motion, and the 13.7-N applied force is in the direction of motion, then

1. it will accelerate under a net force of about 1.9 N.

2. it will move at constant speed.

3. it will decelerate under a net force of about 1.9 N.

4. it will decelerate under a net force of 11.8 N.

Explanation:

the switch and the battery

Answer:    

Soil absorbs heat faster than sand, which absorbs heat faster than water. The air over Earth's surfaces absorbs heat from the materials of Earth.

Explanation:

Land surfaces absorb much more solar radiation than water. ... Water reflects most solar radiation that reaches its surface back to the atmosphere. Since land absorbs more solar radiation the land surface retains more heat as do the vegetation for energy. Thus, land surfaces warm more quickly than water.

Hope this helps!     Thank you,

Soil absorbs heat faster than sand, which absorbs heat faster than water. The air over Earth's surfaces absorbs heat from the materials of Earth.

When solar radiation strikes the earth's surface, land surfaces absorb the energy differently than ocean surfaces. They both heat up and cool down at different speeds.

Water takes longer to heat than land, but once heated, it keeps its heat for a longer period of time.

Land surfaces absorb far more solar energy than water. The majority of solar energy that reaches the surface of the water is reflected back into the atmosphere.

Because land absorbs more solar radiation, the land surface retains more heat, as does vegetation. As a result, terrestrial surfaces warm faster than water.

Hence soil absorbs heat faster than sand, which absorbs heat faster than water. The air over Earth's surfaces absorbs heat from the materials of Earth.

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Answer:

Gravity

Explanation:

Answer:

Push - The most common form of force is a push through physical contact (like a lawnmower or shopping cart)

Pull - You can apply a force by directly pulling on an object (like pulling a wagon)

Explanation:

-- you sit on a chair

-- gravity pulls something down

-- water pushes a log up to float

-- air holds the skin of a balloon out, in a ball-shape

-- my dog bites a bone

-- air holds the tires of my car out, in donut shapes

-- a book presses on a table

-- my shoes press down on the floor

-- my feet press down on the bathroom scale

-- the bathroom scale presses up on my feet

-- gravity pulls the Earth up toward me

Answer:

13.4 m/s^2

Explanation:

40 divided by 3 equals 13.3 repeating.

The acceleration of an astronaut standing on the inner surface of a cylindrical space station of radius R rotating with angular velocity w is w^2R towards the center of the station. To make the astronaut feel as if they were on the surface of the Earth, the space station with a radius of 50 m must rotate with an angular velocity of approximately 1.53 radians per second.

When an object is rotating, there is a centripetal acceleration towards the center of rotation, given by a = w^2R, where w is the angular velocity and R is the radius. Therefore, the acceleration of an astronaut standing on the inner surface of the space station is w^2R towards the center of the station.

To make the astronaut feel as if they were on the surface of the Earth, the centripetal acceleration of the space station must be equal to the acceleration due to gravity on Earth, which is approximately 9.8 m/s^2. Therefore, we can set w^2R = 9.8 and solve for w to get w ≈ 1.53 radians per second.

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Before starting to move a crate using the right arrow button, we need to set the friction bar to medium. This is because friction is a force that opposes motion. Hence, if the crate is too heavy and the friction is low, the crate won't move easily.

Similarly, if the crate is too light and the friction is high, we need to apply more force to move it. Therefore, we should adjust the friction to a medium level which will allow us to move the crate with ease. After setting the friction to medium, the next step is to select a 50k crate. This is important because different crates have different weights. So, if we select a crate that is too heavy, it will be hard to move it even if the friction is set to medium.

Similarly, if we select a crate that is too light, we might have to apply more force than necessary to move it. Therefore, selecting a 50k crate is a good balance between weight and ease of movement.

Finally, once we have selected a 50k crate and set the friction to medium, we can slowly apply rightward force using the right arrow button. This is because we want to avoid applying too much force at once which might cause the crate to move too fast and become hard to control. By applying force slowly, we can ensure that the crate moves in the desired direction and speed.

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Answer:

\(30 \div 33750 = 0.008888\)

Answer:

La persona está nadando en la alberca a una profundida de 5.575 metros.

Explanation:

La presión absoluta (\(P_{tot}\)) experimentada por la persona es la suma de la presión atmosférica (\(P_{atm}\)) y la presión hidrostática de la columna de agua de la alberca (\(P_{h}\)), medidas en kilopascales. Es decir,

\(P_{tot} = P_{atm}+P_{h}\) (1)

\(P_{tot} = P_{atm} + \frac{\rho\cdot g \cdot z}{1000}\) (2)

Donde:

\(\rho\) - Densidad del fluido de la alberca, medida en kilogramos por metro cúbico.

\(g\) - Aceleración gravitacional, medida en metros por segundo al cuadrado.

\(z\) - Profundidad de la persona en la alberca, medida en metros.

Si sabemos que \(P_{atm} = 101.325\,kPa\), \(\rho = 1000\,\frac{kg}{m^{3}}\), \(g = 9.807\,\frac{m}{s^{2}}\) y \(P_{tot} = 156\,kPa\), entonces la profundidad de la persona en la alberca es:

\(156 = 101.325 +\frac{(1000)\cdot (9.807)\cdot z}{1000}\)

\(54.675 = 9.807\cdot z\)

\(z = 5.575\,m\)

La persona está nadando en la alberca a una profundida de 5.575 metros.

The angle at which a 2.20 µm wide slit produces its first minimum for 410 nm violet light can be calculated using the equation for the first minimum in a single slit diffraction pattern. The equation is given by:

sinθ = (m * λ) / w

Where:
θ is the angle of the first minimum
m is the order of the minimum (in this case, m = 1 for the first minimum)
λ is the wavelength of the light (410 nm, which is equal to 410 * 10^(-9) m)
w is the width of the slit (2.20 µm, which is equal to 2.20 * 10^(-6) m)

we have:

sinθ = (1 * 410 * 10^(-9)) / (2.20 * 10^(-6))

Calculating this expression, we find:

sinθ ≈ 0.1864

To find the angle θ, we can take the inverse sine (sin^(-1)) of 0.1864:

θ ≈ sin^(-1)(0.1864)

Using a calculator, we find:

θ ≈ 10.7°

Therefore, the angle at which the 2.20 µm wide slit produces its first minimum for 410 nm violet light is approximately 10.7°.

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Rounding this value to the nearest 0.1°, the angle at which the first minimum occurs for the 2.20 µm wide slit with 410 nm violet light is approximately 93.2°.

Explanation :

The angle at which the first minimum occurs for a slit can be calculated using the formula:

θ = λ / (2 * a)

Where θ is the angle, λ is the wavelength of the light, and a is the width of the slit.

Given that the width of the slit is 2.20 µm and the wavelength of the violet light is 410 nm (or 410 x 10^-9 m), we can substitute these values into the formula:

θ = (410 x 10^-9) / (2 * 2.20 x 10^-6)

Simplifying this expression:

θ = 0.00041 / 0.0000044

θ = 93.18 degrees

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To solve this we must be knowing each and every concept related to variables. Therefore, because the evidence cards all represent variables, none of them should be deleted.

A variable is any trait, characteristic, number, or quantity that changes over time or may take on different values in different contexts (as contrast to constants, such as n, which do not change).

Magnetic pole configuration is a variable since its values can vary.

The quantity of coils is indeed a variable since it might have several numbers.

Rail material is indeed a variable since its values might vary.

The distance between the automobile and the launcher is flexible since it might take various values.

Therefore, because the evidence cards all represent variables, none of them should be deleted.

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Answer:

The answer is not B or D because they need light co2 and water to make their food so B and D are out. and unless someone is walking during winter to feed it. It will not be A so the answer is C.

Explanation:

Plants can use heat in the ground to make food in winters. Plants make food through photosynthesis, and photosynthesis takes place mostly in plant leaves, but when plants lose their leaves in the winter, they do not die. Thus, the correct option is B.

Photosynthesis is the process through which plants use the sunlight, which is trapped in the chlorophyll pigment present in the chloroplast of cells to convert water, and carbon dioxide to produce oxygen gas and energy in the form of sugar (carbohydrate).

Photosynthesis is the process in which energy transformation takes place. In this process, light energy from the sun is converted into chemical energy that is in the form of carbohydrate in the leaves of the plant.

Therefore, the correct option is B.

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Turn the dial either clockwise to make the unit colder or anticlockwise to make the unit warmer to set the thermostat to any temperature.

A thermostat is a part of a regulating mechanism that senses the temperature of a physical system and takes action to keep it close to a desired setpoint.

Any system or gadget that heats or cools to a setpoint temperature uses a thermostat. Examples include central heating systems for buildings, air conditioners, HVAC systems, water heaters, kitchen appliances like refrigerators and ovens, and incubators for use in science and medicine.

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The result is added to the initial height of 15 meters to obtain the height of the capsule at any given time.

To determine the number of rotations each capsule makes in a given time, we need to convert the time to minutes and divide by the time it takes for one full rotation.

In 1 hour (60 minutes), each capsule will make 60 minutes / 30 minutes = 2 rotations.

In 2 hours (120 minutes), each capsule will make 120 minutes / 30 minutes = 4 rotations.

In t hours (t × 60 minutes), each capsule will make (t × 60 minutes) / 30 minutes = (2×t) rotations.

To calculate the number of radians each capsule sweeps in a given time, we need to multiply the number of rotations by 2π (since one full rotation is equal to 2π radians).

In 1 hour, each capsule will sweep 2 rotations × 2×π radians = 4π radians.

In 2 hours, each capsule will sweep 4 rotations × 2×π radians = 8π radians.

In t hours, each capsule will sweep (2×t) rotations × 2×π radians = 4tπ radians.

The height of a capsule can be determined using the following equation:

H_(t) = 15 meters + (t × 30 minutes × (165 meters - 15 meters) / (60 minutes))

In this equation, t represents the time in hours since the capsule boarded. The term (t × 30 minutes) converts the time to minutes, and the division by (60 minutes) converts it back to hours. The expression (165 meters - 15 meters) represents the total vertical distance the capsule can travel, and it is multiplied by the ratio of the elapsed time to the total time for one full rotation. The result is added to the initial height of 15 meters to obtain the height of the capsule at any given time.

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The five pillars of safety are engineering, encouragement, enforcement, and evaluation. Your strategy to ensure that you promote a safe environment and workplace should heavily emphasize education.

By exercising your intellect beforehand, you may be able to save a life or at least lessen someone else's suffering. The three fundamental Cs are check, call, and care.

A Framework for Aligning the 14 Process Safety Management Elements. To prevent the release of extremely hazardous substances, it is essential to use related techniques to managing hazards, although it might be difficult to put Process Safety Management's operational goals into effect.

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Answer:

About 4,000 K and 10⁻¹⁷ atm

Explanation:

The Big Bang theory states that the Big Bang which is the origin of the universe was about 13.75 billion years ago, and the temperature a few seconds later was 10³²K

The first element began forming at about 3 minutes after the Big Bang with a temperature of 10⁹ K, the nuclei of simple elements

The nuclei of hydrogen and helium began combine with electrons at a temperature of 3,000 K to 4,000 K to form the first neutral atoms. The pressure of the universe at that stage was 10⁻¹⁷ atmospheres

The answer is increase.

d = m/v. if you increase the mass without changing the volume, the density will increase.

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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Answer:

One benefit I listed: a higher salary

Explanation:

He expands his career possibilities which can lead to a higher salary, better or more preferable hours, more vacation time, and numerous other potential outcomes.

Answer: Some of the ways to control noise pollution are as follows: (1) Control at Receiver's End (2) Suppression of Noise at Source (3) Acoustic Zoning (4) Sound Insulation at Construction Stages (5) Planting of Trees (6) Legislative Measures.

Answer:

You have to:

a) Improve your insulation.

b) Install a fence

c) Use modern Acoustic wall panels

d) Plant trees

e) Reduce electronic volumes,e.t.c.

Explanation:

okay.

The formula for the covalent compound dichlorine Heptoxite is CL2O6.

Name the first element first then name the second element using the element name stem and the ide suffix. If there are multiple atoms of the first element use the numeric prefix. Always use a numeric prefix for the atomic number of the second element. Dichloroheptoxide is a compound of a clear oily liquid. It is a strong oxidizing agent.

The hardness of a diamond can be read from its crystal structure. Each carbon atom is bound to four other carbon atoms by covalent bonds in a regular tetrahedral structure. Each of these bonded carbon atoms is then further bonded to three other carbon atoms. In the semiconductor industry, chlorine trifluoride is used to clean chemical vapor deposition chambers. Advantageously the semiconductor material can be removed from the chamber walls without the need to dismantle the chamber.

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Magnitude of the friction force exerted on the ladder by the floor is equal to the product of the coefficient of static friction and the normal force exerted by the floor on the ladder.

When the ladder leans against the wall, it exerts a force on the wall perpendicular to it, called the normal force. The floor also exerts a force on the ladder perpendicular to it, which is equal and opposite to the normal force exerted by the ladder on the floor.

In order for the ladder to remain stationary and not slip, the friction force between the ladder and the floor must be sufficient to balance the force of gravity acting on the ladder. The coefficient of static friction is a measure of how "sticky" the surfaces are in contact, and determines the maximum friction force that can be exerted.

Therefore, the magnitude of the friction force exerted on the ladder by the floor is given by the product of the coefficient of static friction and the normal force exerted by the floor on the ladder.

Factors involved in determining the friction force between the ladder and the floor.

To find the magnitude of the friction force, we can use the concept of static equilibrium. Since the ladder is not moving, the forces acting on it must be balanced, which means the sum of the forces in the horizontal and vertical directions must be equal to zero.

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Answer:

1. While boiling replace the cap and allow it to cool. Vapours inside condense and form water creating vacuum above them. Observation - The can crumbles due to air pressure from outside. This proves that air exerts pressure.

2. Measure the volume of the liquid displaced when the object is submerged. Measure the initial volume of water in graduated cylinder. Submerge the irregular object. Measure the final volume of the water.

— The difference between the initial volume and the final volume is the volume of the object.

hope can help ^_^

Answer:

1. Following the recoil principle, rockets use combustion (a controlled explosion) to work against earth's gravitational attraction.

2. A force is a push or a pull that acts upon an object as a results of its interaction with another object. ... These two forces are called action and reaction forces and are the subject of Newton's third law of motion. Formally stated, Newton's third law is: For every action, there is an equal and opposite reaction.

(via physicsclassroom.com)

3. The combustion throws out material with very high momentum and is, physically speaking, the action. In reaction to that that, the rocket moves away from it (upward when in starts and has the action underneath it)

4. To show the world that commercial manned space missions are safely possible. Some may also like the fact that the US can now do, or rather order, manned flights into space without the help of the russian space agency (Roskosmos).

5. Robert Behnken and Douglas Hurley

6. The international space station (ISS)

7. Yes, Stage 1 of the rocket landed on the drone ship. The crew opened the hatch to enter the space station after 21 hours and 39 minutes after the launch from Cape Canaveral.

8. To have private contractors such as SpaceX actively in the field, there are now more interest groups that participate in space travel. And they can interact with other companies as well.

Also, due to Musks dream and efforts of SpaceX, space travel seems to get a lot cheaper.

That might indeed open the way back to the moon and further to the Mars for human space flight.

Governments such as the US planned on such things for decades, but changed plans ever since, and routinely changed leadership and the opinion on what's important.

Now Spaceflights can become less politically motivated and more commercially. That seems to be a more stable way over long periods of time.

(wrote most of it for you myself, even tough I'm not a native English speaker. would really appreciate the brainliest if you appreciate the work)

Answer:

yhgfty

Explanation:

cdfgv

The energy released in a magnitude 5.2 earthquake would be equivalent to approximately 15.8 atomic bombs.  The equivalent energy released in a magnitude 9.2 earthquake would be approximately 500,000 atomic bombs.

The energy released by an earthquake can be measured using the Moment Magnitude Scale (Mw). Each increase of one unit on the scale represents a tenfold increase in the amplitude of ground motion and roughly 31.6 times more energy release. Given that, a magnitude 6.2 earthquake releases energy equivalent to 500 atomic bombs, a magnitude 5.2 earthquake would release energy approximately 31.6 times less than that of a magnitude 6.2 earthquake. Therefore, the energy released in a magnitude 5.2 earthquake would be equivalent to approximately 15.8 atomic bombs.

On the other hand, a magnitude 9.2 earthquake would release energy approximately 1,000 times greater than that of a magnitude 6.2 earthquake. Therefore, the equivalent energy released in a magnitude 9.2 earthquake would be approximately 500,000 atomic bombs. The energy released during such a powerful earthquake can cause catastrophic damage over vast areas.

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Answer:

Explanation:

If you pour hazardous household waste in ditches, storm drains, or gutters, it can poison plants and wildlife, contaminate the soil, and harm children and adults who come in contact with it. When it rains, the hazardous household waste travels directly to nearby streams, rivers, and lakes.

Answer:

Buried in the garden – dangerous chemicals and poison can leach into the surface or groundwater. This can affect the soil, plants and water for a long time. ... It may also pollute waterways and drinking water if sent to normal landfills. Hazardous waste should only be stored in specially designed landfills.

Explanation:

putting it somewhere else is safer

Answer:

450 kg

Explanation:

In the picture above. Goodluck

Answer:

The correct answer is D :)

Explanation:

Got it right edge 2021

According to the charge that is stored on the positive plate, the order is B, A, C, D, and E, from biggest to smallest.

The charge stored on the positive plate of a capacitor is given by Q = CV, where Q is the charge, C is the capacitance, and V is the voltage. Since the capacitors are connected in parallel, they all have the same voltage V. Therefore, the capacitor with the largest capacitance will have the largest charge stored on its positive plate.

Ranking the capacitors from largest to smallest based on their capacitances, we get:

B) A = 2 cm, C = 8 nF

A) A = 4 cm, C = 8 nF

C) A = 2 cm, C = 4 nF

D) A = 4 cm, C = 2 nF

E) A = 1 cm, C = 1 nF

Therefore, the ranking from largest to smallest based on the charge stored on the positive plate is: B, A, C, D, E.

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After watching the Ted Talk, there were still a few questions that I had about supermassive black holes. Firstly, I wanted to know more about the event horizon and what it exactly entails. Although the speaker briefly touched upon this subject, I would have appreciated a more in-depth explanation. Additionally, I would have liked to know more about the role of supermassive black holes in the universe.

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