g A The box leaves position x=0 with speed v0. The box is slowed by a constant frictional force until it comes to rest at position x=x1. Find Ff, the magnitude of the average frictional force that acts on the box. (Since you don't know the coefficient of friction, don't include it in your answer.) Express the frictional force in terms of m, v0, and x1. View Available Hint(s) Ff = nothing Part B After the box comes to rest at position x1, a person starts pushing the box, giving it a speed v1.

The correct answer choice which is correct about the description of a neutral posture from above is: A boy sitting on an examination chair whose knees are at the same height.

The correct answer choice is option a.

Neutral posture can simply be defined as that position which an individual is that he or she finds comfort in and that can be in that position for a prolonged time. However, the part of the mammalian brain which controls our body postures is known as what we call the cerebellum.

From the context of the task, the body is sitting on a chair with his two knees at the same height is a neutral posture because he will be eased and comfortable to be in this position for a long while.

So therefore, we can now deduce from all said and done above that good posture helps us to maintain balance.

Complete question:

Which of the following would be included in a neutral posture:

a. A boy sitting on an examination chair whose knees are at the same height

b. An examiner sitting on a chair whose knees are at heights far above each other apart

c. A man standing on the stairs whose elbows are lifted upward for long

d. None of the above.

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The current (I₃) flowing through the triple resistor is 1.55 Amperes.

The amount of electric current (I) flowing through a conductor or conductor will be directly opposite the potential difference/voltage (V) applied to it and inversely with the resistor (R).

From that sound, Ohm's law can be formulated mathematically into the following equation:

V = I x R

I = V/R

R = V/I

Information:

V = Voltage or difference or voltage, unit volts (V)

I = Current, the unit is amperes (A)

R = Resistance, the unit is ohms (W)

In the problem R₃ = 31.00 Ohm and V₃ = 20.00 V. So the current flowing from resistor three is

I₃ = V₃/R₃

I₃ = 31.00/20.00

I₃ = 1.55 Amperes

The current (I₃) flowing through the triple resistor is 1.55 Amperes.

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4,838.71 pounds per square foot of pressure are exerted on the silo's floor. 33.59 pounds per square inch of pressure is exerted on the silo's floor.

the formula for pressure, which is:

pressure = force/area

force = 3,000,000 lb

area = 620 ft^2

a) Pressure in pounds per square foot:

pressure = force / area

pressure = 3,000,000 lb / 620 ft^2

pressure = 4,838.71 lb/ft^2

We must divide by the conversion factor of 144 square inches per square foot to convert pounds per square foot to psi:

pressure = 4,838.71 lb/ft^2 / 144 in^2/ft^2

pressure = 33.59 psi

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If the force provided by the engine of a toy car decreases, the car will slow down and eventually come to a stop.

1. The force provided by the engine of a toy car is responsible for propelling it forward at a constant speed. This force overcomes any friction or resistance acting on the car.

2. When the force provided by the engine decreases, there is a reduction in the overall force acting on the car. As a result, the force can no longer counteract the resistance and friction effectively.

3. The resistance and friction acting on the toy car, such as air resistance and the friction between the wheels and the surface, start to have a greater impact on the car's motion.

4. With a reduced force from the engine, the car begins to slow down gradually. The deceleration occurs because the opposing forces now have a greater influence on the car's motion.

5. As the force continues to decrease, the opposing forces eventually surpass the remaining force from the engine. Consequently, the toy car slows down even more and eventually comes to a complete stop.

6. If the force provided by the engine becomes extremely low or nonexistent, the opposing forces will completely overpower the forward force, causing the toy car to stop moving altogether.

In summary, when the force provided by the engine of a toy car decreases, the car's speed decreases, and it eventually comes to a stop due to the increased influence of opposing forces.

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12. The time taken for the journey is 400 s

13. The time taken for the train is 200 s

14. The time taken is 7 h

15. The time taken for the beetle is 12 s

16. The time taken for the journey is 0.0068 h

The time taken in each case as given by the question can be obtain as follow:

12. The time taken for the journey

Time taken = Distance / Speed

Time taken = 26000 / 65

Time taken = 400 s

13. The time taken for the train

Time taken = Distance / Speed

Time taken = 3200 / 16

Time taken = 200 s

14. The time taken to travel

Time taken = Distance / Speed

Time taken = 672 / 96

Time taken = 7 h

15. The time taken for the beetle

Time taken = Distance / Speed

Time taken = 1.08 / 0.09

Time taken = 12 s

16. The time taken for the journey

Time taken = Distance / Speed

Time taken = 35 / 5147

Time taken = 0.0068 h

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Answer:

74.0 meters

Explanation:

We can use the kinematic equation for displacement with constant acceleration to solve this problem:

Δy = v0t + 1/2at^2

where Δy is the displacement (i.e., the change in height), v0 is the initial velocity (which is 0), a is the constant acceleration, and t is the time taken.

Plugging in the given values, we get:

Δy = 0 + 1/2(71.0 m/s^2)(1.45 s)^2

Δy = 74.0 m

Therefore, the maximum altitude achieved by the rocket is 74.0 meters above the ground.

\(|A|=\sqrt{4^2+3^2}=5\\ |B|=\sqrt{5^2+(-2)^2}=\sqrt{29} \\\)

Zero work does Big Foot do going up the stairs.

Work in physics is the energy that is transferred to or from an item when a force is applied along a displacement. In its simplest form, it equals the product of the force's magnitude and the distance travelled for a constant force directed in the direction of motion.

Given in the question a 220 Kg now hunters are moving upstairs that is right angle so cos 90 is zero .

Work = force x distance. In units, Joules = Newtons x meters.

So: Work = zero

Zero work does Big Foot do going up the stairs.

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Answer:

a) T = 0.5 s

b) v = 1.2π m/s ≈ 3.77 m/s

Explanation:

It makes two revolutions in one second so makes one revolution in ½ second

circumference of the circle is

C = 2πr = 0.6π m

which it traverses in one time period

0.6π m / 0.5 s = 1.2π m/s

To solve this, we must be knowing each and every concept related to speed and its calculations. Therefore, the angular speed of a model car moves round a circular path of radius 0.3m at 2 revolutions per secs is 3.77 m/.

Speed may be defined as the distance traveled by an item in the amount of time it requires to travel that distance. In other words, it measures how rapidly an item travels but does not provide direction.

Speed may be calculated in Science. The speed equation is a scientific formula that is used to calculate various types of speed.

Mathematically, the formula for speed can be given as

speed= distance/time

Values that are given

Time period= 0.5 s

Circumference = 2πr = 0.6π m

substituting all the given values in the above equation, we get

speed     =0.6π m / 0.5 s

On calculations, we get

              = 1.2π m/s

              =3.77 m/s

Therefore, the angular speed of a model car moves round a circular path of radius 0.3m at 2 revolutions per secs is 3.77 m/.

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Answer:

electrical to the thermal

Explanation:

Answer:

The velocity & acceleration will be taken as negative when a ball is thrown upward because work is done against the gravity.

Explanation:

Weathering is the breaking down or dissolving of rocks and minerals on Earths surface.

Erosion is the process by which the surface of the Earth gets worn down. Erosion can be caused by natural elements such as wind and glacial ice

Deposition is the dropping of sediment by wind, water, ice, or gravity.

Answer:

Weathering: refers to the process of breaking down and disintegrating rocks, minerals, soils, as well as several other materials.

Erosion: refers to the process of wearing down the surface of the earth due to glacial ice, wind and other natural elements.

Deposition: refers to the geological process, of sediments and soil, added to landforms due to wind, ice and other natural elements to build up layers od sediments.

Explanation:

Answer:

Because alkali metals are so reactive, they are found in nature only in combination with other elements. They often combine with group 17 elements, which are very “eager” to gain an electron.

Explanation:

hope this helps you if it does please mark brainliest

Answer:

equator

Explanation:

in south & north pole you could have 20+ hours daylight or night, everyday!

Answer:

??????? umm what r u saying??? kinda confusing..............what does question why if you keep dieing in zombies on cold war u think im gunna rev you. i just got the key and the d.i.e remote and am geting the wonder wepon. but soon as that door explode you so quick to grab it you die. played me like a fool. why the heck you keep tryna exfil on round 15 BOI IF YOU DONT WQBFUFHJEWFHFNQC! packapunched knife to tier 1 head aS BOI!!! mean????????

very very very confusing

Explanation:

plz mark brainlyist :()

The reading on a vernier caliper can be represented as 45.75mm.

1. Understand the components of a vernier caliper: A vernier caliper consists of two main scales - the main scale and the vernier scale. The main scale is typically graduated in millimeters, while the vernier scale is a smaller scale that slides along the main scale.

2. Locate the main scale: Identify the main scale on the vernier caliper. The main scale is usually marked on the fixed jaw of the caliper and extends in a linear fashion.

3. Identify the vernier scale: The vernier scale is attached to the movable jaw of the caliper. It slides along the main scale and consists of smaller divisions.

4. Align the zero marks: Close the jaws of the caliper and ensure that the zero marks on both the main and vernier scales are aligned.

5. Determine the main scale reading: Read the main scale value that aligns with the zero mark on the vernier scale. In this case, the main scale reading will be 45mm.

6. Locate the vernier scale reading: Examine the vernier scale and identify the division on the vernier scale that lines up perfectly with a division on the main scale. This will give you the additional measurement beyond the main scale reading.

7. Determine the vernier scale reading: Find the division on the vernier scale that aligns with a division on the main scale. The value of this vernier division corresponds to the additional measurement. In this case, the vernier scale reading will be 0.75mm.

8. Add the main scale and vernier scale readings: Combine the main scale reading and the vernier scale reading to get the final measurement. In this case, the final reading will be 45.75mm.

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Please complete your question and then send

Argon

as it is an inert elemnt

Answer:

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Class 11

>>Physics

>>Units and Measurement

>>Measurement of Area, Volume and Density

>>Antarctica is roughly semicircular, with

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Antarctica is roughly semicircular, with a radius of 2000 km.The average thickness of its ice cover is 3000 m.How many cubic centimetres of ice does Antarctica contain? (Ignore the curvature of Earth.)

1765107

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Hard

Solution

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Verified by Toppr

Area of the Antarctica ice A=π×(R)

2

where, R is the radius .

A=(π×2000×2000)m

2

A=1.257×10

13

m

2

Volume of the ice in Antarctica V=A∗H

where, H is the height

V=(1.257×10

13

×3000)m

3

V=3.77×10

16

m

3

Now, to convert cubic meter to cubic cm

V=3.77×10

16

/10

−6

cm

3

V=3.77×10

22

cm

3

Antarctica contains approximately \(\(5.59447 \times 10^{24}\)\) cubic centimeters of ice.

To calculate the volume of ice that Antarctica contains, we can treat it as a hemisphere (half of a sphere) since it is roughly semicircular and ignore the curvature of the Earth. The formula to calculate the volume of a hemisphere is: \(\[ V = \frac{2}{3} \pi r^3 \]\)

where:

r = 2050 km (convert to meters: \(\( 2050 \, \text{km} \times 1000 \, \text{m/km} = 2,050,000 \) m)\)

h = 3100  m

Let's calculate the volume:

\(\[ V = \frac{2}{3} \pi (2050000 \, \text{m})^3 \]\[ V = \frac{2}{3} \pi (8.41025 \times 10^{18} \, \text{m}^3) \]\)

Now, we need to convert the volume to cubic centimeters since 1 m³ = 1,000,000 cm³:

\(\[ V = \frac{2}{3} \pi (8.41025 \times 10^{18} \, \text{m}^3) \times 1,000,000 \, \text{cm}^3/\text{m}^3 \]\[ V = \frac{2}{3} \pi (8.41025 \times 10^{24} \, \text{cm}^3) \]\)

Now, calculate the final value:

\(\[ V = 5.59447 \times 10^{24} \, \text{cm}^3 \]\)

So, Antarctica contains approximately \(\(5.59447 \times 10^{24}\)\) cubic centimeters of ice.

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Answer:

Elements have a characteristic number of electrons and protons.Both Hydrogen(H) and oxygen(O) are two different elements.

••••••••••••••••

Compounds are chemical substances where the atoms atoms of two different elements are combined together. It is made of .Hydrogen(H) and Oxygen(O) both qr4 naturally gases,but they react to form water(H2O),which is liquid compound.

•••••••••••••••

A mixture is made of atleast two parts》 solid,liquid or gas.The difference is that it's not a chemical substance that's bonded by other elements. 

------------------------------

Hope it helps...

Have a great day!!!

Answer: Elements have a characteristic number of electrons and protons. Both Hydrogen(H) and oxygen(O) are two different elements. Compounds are chemical substances where the atoms atoms of two different elements are combined together. It is made of.Hydrogen(H) and Oxygen(O) both qr4 naturally gases, but they react to form water(H2O), which is liquid compound. A mixture is made of at least two parts solid, liquid, or gas. The difference is that it's not a chemical substance that's bonded by other elements.

Answer:

The value is  \(v = 0.3133 \ m/s\)

Explanation:

From the question we are told that

     The mass  of the first  model is  \(m_1 = 0.235 \ kg\)

      The sliding speed is \(u_1 = 0.720 \ m/s\)  

       The mass of the second model is  \(m_2 = 0.305 \ kg\)

Generally from the law of momentum conservation w have that

                \(m_1 * u_1 + m_2 * m_2 * u_2 = (m_1 + m_2 ) v\)

Here \(u_2\) is the velocity of the second model and given that it is  motionless at it initial state the value will be  \(u_2 = 0 \ m/ s\)

 So  

                \(0.235 * 0.720 + 0.305 * 0 = (0.235 + 0.305 ) v\)

=>              \(v = 0.3133 \ m/s\)

Answer:

Ancestors!

Explanation:

I know a thing or two~

Answer:

It depends on what the context is, if you mean people that came long before us you might be refering to ancestors, but if you mean people that came before us at any time then you would be refering to a predecessor.

Explanation:

The highest energy, shortest wavelengths, and highest frequency are found in gamma rays.

An example of "electromagnetic" radiation is microwaved, which are waves of electrical and magnetic energy traveling across space together. There is a wide range of electromagnetic radiation, from very lengthy radio waves to very brief gamma rays.

Radiation with a wavelength shorter than visible light is known as ultraviolet light. If eye protection is not worn, UV exposure raises the risk of potentially blinding eye illnesses. UV radiation overexposure can cause major health problems, including cancer.

The waves are gamma rays (below 1 nm), x-rays (between 1 and 10 nm), infrared rays (between 700 and 105 nm), micro waves (between 105 and 108 nm), and radio waves (above 108 nm), in that order.

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Answer:

a) 0.147 N

b) 9.408 N

c) 9.261 N

Explanation:

The tension on the cord is the only force keeping the block in circular motion, thus representing the entirety of its centripetal force \(\frac{mv^{2} }{r}\). Plugging in values for initial and final states and we get answers for a and b. The work done by the person causes the centripetal force to increase, and thus is the difference between the final tension and the initial tension.

Answer:

basketball

Explanation: cause it is

Answer:

It honestly depends on which one you're better at.

Explanation: I mean that's what I think.

The average temperature of London is warmer than that of Calgary in December as the oceanic currents warm the atmosphere in London.

Gravity, wind, and water density are what cause ocean currents, which are the continuous, predictable, directed movement of seawater. There are two directions in which ocean water can move: horizontally and vertically. Vertical shifts are referred to as upwellings or downwellings, while horizontal motions are known as currents.

Long-distance ocean currents combine to form the global conveyor belt, which is a major factor in determining the climate in many parts of the world. Ocean currents specifically affect the temperature of the areas they pass through.

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Explanation:

distance and time both are scaler quantity

The scalar quantity that can be found out from distance and time is speed, which will be equal to 12 m/s.

The amount of the shift in approach per unit of time or the size of the displacement over time for an object can be used to describe speed, which would be a scalar quantity used in everyday language and kinematics.

The maximum speed that can be maintained when a time period grows closer to zero is the starting speed.

By dividing the object's traveled by the duration of the interval, the mean pace of the object for the given period of time is calculated. Speed and velocity are not always the same thing.

As per the given information in the question,

Distance, d = 240 m

Time, t = 20s

Then, the Speed will be,

s = d/t

s = 240/20

s = 12 m/s.

Therefore, speed is the scalar quantity that is 12 m/s.

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Answer:

Serotonin

___________

Answer: 1.13 X 10^3 g or 1130 g

Explanation: When you add up everything, you will get 1134.1288 g = 1.11341218 X 10^3. But while adding significant figures, we always look for the least significant figures (here 4.65 has least sig. figures  i.e. 3) and take that as a reference to how many significant figures we should have in the answer. (Pretty hard to explain!) Hope you got it!!