Benjamina started her walk from the front door of herground floor apartment. She walked 6 meters to thecorner of the building and then turned the corner andwalked 10 meters to her friend's apartment. Identify thedifference between the distance she walked and herdisplacement

Answer:

K= -U/2

Explanation:

We know that K.E = 1/2mv²

And -GMm/r²= mv²/r

Thus K,E= 1/2(GMm/r)= 1/2(-P.E)

So

P.E = - GMm/r

So K= -U/2

Answer:

with what? I can help but with what

Answer:

2

Explanation:

Given data

*The given mass of the ball is m = 14.0 kg

*The given height is h = 255 m

*The value of the acceleration due to gravity is g = 9.8 m/s^2

The formula for the potential energy of the ball is given as

Substitute the known values in the above expression as

Hence, the potential energy of the ball is 34986 J

Answer:

which on a is the question

The potential energy of the roller coaster is 176,400 J (joules).

The potential energy of an object is given by the formula PE = mgh, where PE is the potential energy, m is the mass of the object, g is the acceleration due to gravity, and h is the height or vertical position of the object.

In this case, the roller coaster is at a peak of 20m and has a mass of 900kg. The acceleration due to gravity, g, is approximately 9.8 \(m/s^2\).

Using the formula, we can calculate the potential energy:

PE = mgh

= (900 kg)(9.8 \(m/s^2\))(20 m)

= 176,400 J

Therefore, the potential energy of the roller coaster is 176,400 J (joules).

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A parallel circuit is an electrical circuit with more than one current path and all circuit components are connected between the same two sets of electrically common points. The current supplied by the source in a parallel circuit is equal to the sum of all branch currents in the circuit.

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Answer:

9. (B) ¼ Mv²

10. (A) √(3gL)

11. 20 N

12. 5 m/s²

Explanation:

9. The rotational kinetic energy is:

RE = ½ Iω²

RE = ½ (½ MR²) (v/R)²

RE = ¼ Mv²

10. Energy is conserved.

Initial potential energy = rotational energy

mgh = ½ Iω²

Mg(L/2) = ½ (⅓ ML²) ω²

g(L/2) = ½ (⅓ L²) ω²

gL = ⅓ L² ω²

g = ⅓ L ω²

ω² = 3g / L

ω = √(3g / L)

The velocity of the top end is:

v = ωL

v = √(3gL)

11. Sum of torques about the hinge:

∑τ = Iα

-(Mg) (L/2) + (T) (r) = 0

T = MgL / (2r)

T = (3.00 kg) (10 m/s²) (1.60 m) / (2 × 1.20 m)

T = 20 N

12. Sum of forces on the block in the -y direction:

∑F = ma

mg − T = ma

Sum of torques on the pulley:

∑τ = Iα

TR = (½ MR²) (a / R)

T = ½ Ma

Substitute:

mg − ½ Ma = ma

mg = (m + ½ M) a

a = mg / (m + ½ M)

Plug in values:

a = (3.0 kg) (10 m/s²) / (3.0 kg + ½ (6.0 kg))

a = 5 m/s²

The power needed to boil the water is divided by the element's power output, and the result is multiplied by 100 to get the efficiency of the kettle as a percentage. The answer is 79 %.

We are informed that

Electric kettle power is 1 kW.

Electric kettle voltage is 230 V.

The time it takes the kettle to bring the water to boiling point is 7.5 minutes.

1 kg = mass of water.

Heat generated equals V x I x t + Pt.

generated heat = 1000 W x 7.5 x 60

Heat absorbed equals (100 - 15) x 1 x 4200 = 4200 x 85

Efficiency is determined by multiplying the heat produced by the heat absorbed by 100.

= 4.2 x 85 x 10^3 / 4.5 x 10^5 x 100

= 357 / 4.5 = 79 %

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Answer:

To solve the problem we must know the concept of momentum.

What is Momentum?

Momentum is defined as the product of the mass of an object and the velocity of an object. It is a vector quantity.

$$\rm{Momentum = velocity \times Mass$$

The mass of the object is 50 kg.

Given to us

velocity of the object = 3.60 m/s

momentum of the object = 180 kg m/s

Mass of the object

We know that momentum is the product of the mass of the object and the velocity of the object,

$$\rm{Momentum = velocity \times Mass$$

Substitute the values,

180 = 3.60 \times \rm Mass180=3.60×Mass

\rm Mass = \dfrac{180\ kg\ m/s}{3.6\ m/s}Mass=

3.6 m/s

180 kg m/s

\rm Mass = 50\ kgMass=50 kg

Hence, the mass of the object is 50 kg.

Answer:

The Sun's gravity pulls on the planets, just as Earth's gravity pulls down anything that is not held up by some other force and keeps you and me on the ground.

Explanation:

Hope that helps

The sensation of feeling cold after coming out of a swimming pool can be attributed to evaporation, conduction, individual sensitivity.

The several factors are

Firstly, water conducts heat away from the body more efficiently than air. When you are in the pool, the water absorbs heat from your body, causing you to lose heat through conduction. This lowers your body temperature, and when you step out of the water into the air, the temperature difference between your body and the surrounding environment can feel more pronounced, resulting in a sensation of coldness.

Secondly, evaporation plays a role in cooling down the body. As water evaporates from your skin's surface, it takes heat away from your body, creating a cooling effect. When you exit the pool, the moisture on your skin evaporates more rapidly in the drier air, further intensifying the cooling sensation.

Additionally, wet clothing can contribute to the feeling of coldness. Wet fabric against the skin facilitates heat transfer and can make you feel colder than if you were dry.

The perception of coldness after swimming can also be influenced by personal factors such as individual sensitivity to temperature changes, the duration of time spent in the water, and the temperature of the pool itself.

To mitigate the feeling of coldness after swimming, it is advisable to dry off and change into dry clothing promptly. Wrapping yourself in a towel or using a robe can help retain body heat. Additionally, engaging in light physical activity or seeking warmer sheltered areas can help generate body heat and alleviate the sensation of coldness.

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The efficiency of motor is 90.58%.To determine the efficiency of the motor, we need to calculate the input power and the output power, and then divide the output power by the input power

The input power can be calculated using the formula:

Input Power = Voltage × Current

Given that the voltage is 230 V and the current is 24 A, we have:

Input Power = 230 V × 24 A

Input Power = 5520 W (or 5.52 kW)

The output power of the motor is given as 5 kW (since it is a 5 kW motor).

Now, we can calculate the efficiency:

Efficiency = (Output Power / Input Power) × 100%

Efficiency = (5 kW / 5.52 kW) × 100%

Efficiency ≈ 90.58%

Therefore, the efficiency of this motor is approximately 90.58%.

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Answer:

1.25 sec, 2 m/s

Explanation:

Period = 2 * 0.625 sec = 1.25 sec

speed = 2.5/1.25 = 2 m/s

The weight of the box is w = mg, where m is the mass. So

m = w/g = (3893.40 N) / (9.80 m/s²) ≈ 397 kg

Then the box has density

(397 kg)/(4.60 m³) ≈ 86.4 kg/m³

which is less than the density of the given liquid, so the box will float.

Answer:

The mass of the ice added = 16.71 g

Explanation:

The heat gained by the ice is equal to the heat lost by the calorimeter cup and the water in the cup.

But for this question, the cup is said to be perfectly insulated, hence, there is no loss of heat from the calorimeter cup.

Heat gained by the ice = Heat lost by the 326 g of water.

Let the mass of ice be m

The heat gained by the ice = (Heat gained by ice in temperature from -5.5°C to 0°C) + (Heat used by the ice to melt at 0°C) + (Heat required for the melted ice to rise in temperature from 0°C to 15°C)

Heat gained by ice in temperature from -5.5°C to 0°C = mCΔT

m = unknown mass of ice

C = Specific Heat capacity of ice = 2.108 J/g°C

ΔT = change in temperature = 0 - (-5.5) = 5.5°C

Heat gained by ice in temperature from -5.5°C to 0°C = m×2.108×5.5 = (11.594m) J

Heat used by the ice to melt at 0°C = mL

m = unknown mass of ice

L = Latent Heat of fusion of ice to water = 334 J/g

Heat used by the ice to melt at 0°C = m×334 = (334m) J

Heat required for the melted ice or water now, to rise in temperature from 0°C to 15°C = mCΔT

m = unknown mass of water (which was ice)

C = Specific Heat capacity of water = 4.186 J/g°C

ΔT = change in temperature = 15 - 0 = 15°C

Heat required for the melted ice or water now, to rise in temperature from 0°C to 15°C = m×4.186×15 = (62.79m) J

Total heat gained by the ice = 11.594m + 334m + 62.79m = (408.384m) J

Heat lost by the water in the calorimeter cup = MCΔT

M = mass of water in the calorimeter cup = 326 g

C = specific heat capacity of water = 4.186 J/g°C

ΔT = change in temperature = 20 - 15 = 5°C

Heat lost by the water in the calorimeter cup = 326×4.186×5 = 6,823.18 J

Heat gained by the ice = Heat lost by the 326 g of water.

408.384m = 6,823.18

m = (6,823.18/408.384)

m = 16.71 g

Hope this Helps!!!

Answer:    

2 : A large storm

Explanation: I hope this helps

Answer:

Ionic charges refer to the electrical charges of ions, which are atoms or molecules that have gained or lost electrons. These charges result from the loss or gain of electrons during chemical reactions.

When an atom loses one or more electrons, it becomes a positively charged ion known as a cation. The cation carries a positive charge equal to the number of electrons lost.

Conversely, when an atom gains one or more electrons, it becomes a negatively charged ion known as an anion. The anion carries a negative charge equal to the number of electrons gained.

The magnitude of the ionic charge depends on the number of electrons gained or lost, which is determined by the element's position in the periodic table and its electron configuration. For example, sodium (Na) loses one electron to become a +1 charged cation (Na+), while chlorine (Cl) gains one electron to become a -1 charged anion (Cl-).

1. The speed in kilometers per hour (Km/h) is 133.2 Km/h

2. Yes, the speed is exceeding the 125 Km/h limit

From the question given above, the following data were obtained:

We can convert 37 m/s to kilometers per hour (Km/h) by doing the following:

1 m/s = 3.6 Km/h

Therefore,

37 m/s = 37 × 3.6

37 m/s = 133.2 Km/h

Thus, 37 m/s is equivalent to 133.2 Km/h

From the above, we can see that the speed of the car is greater than the speed limit.

Thus, we can conclude that the speed of the car is exceeding the speed limit.

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The average frictional force exerted on the block by the rough section of the surface D 4N.

Frictional force is the force exerted between two objects when they are in contact and one object is moving relative to the other. It is caused by the microscopic irregularities on the surface of the objects, which cause them to stick together and resist relative motion. Frictional forces are always present, and can be beneficial in some cases, but can also cause wear and other forms of damage if too great. Frictional forces can be reduced by applying a lubricant, such as oil or grease, which reduces the surface area of contact and allows the objects to move more easily.

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The pen is falling down due to acceleration due to gravity and for earth it is 9.8 m/s². The pen falls within 1.5 seconds. Then, velocity of the pen is 14.7 m/s.

Acceleration of an object is the rate of change in its velocity. It is a vector quantity having both direction and magnitude.

thus, a = Δv/t

where Δv = V- u

u is the initial velocity and v be the final.

Objects free falling is due to the gravitational pull of earth. Then, the object is associated with an acceleration of  9.8 m/s².

time  t = 1.5 s.

Then, v-u/t = a

The pen is initially at rest , u = 0

v = u + at

 = 0 + 1.5 s × 9.8 m/s²

 = 14.7 m/s.

Therefore,  velocity of the pen is 14.7 m/s.

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In order to calculate the amount of heat required, let's use the following formula:

Where Q is the energy, m is the mass, c is the specific heat and DeltaT is the difference in temperature.

In this question, let's use m = 56.8 g, c = 4.186 J/g°C and DeltaT = 13.6 °C (that is, from 22.2 °C to 35.8 °C), so we have:

Therefore the amount of energy required is 3233.6 Joules.

Answer:

Is pushed by another object

Explanation:

According to Newton's third law

Every action in the universe has opposite and equal reaction.

Or

\(\\ \sf\dashrightarrow F_A=-F_B\)

An object exerts a reaction force when it ____.

A. is pulled by another object

B. maintains its direction of motion

C. has a net force of zero

D. is pushed by another object

Your answer will be (D)

When Sally puts on wool socks and rubs her feet on a nylon carpet, static electricity builds up through a process involving the movement of electrons. The friction between the wool socks and the nylon carpet causes electrons from the wool socks to move to the carpet, resulting in Sally and her socks gaining a negative charge.

The correct answer would be the friction causes electrons from the wool socks to move to Sally, giving Sally a negative charge.

The friction between the wool socks and the nylon carpet causes electrons from the wool socks to move to the carpet, resulting in Sally and her socks gaining a negative charge. This is due to the phenomenon known as the triboelectric effect.

The triboelectric effect occurs when two materials come into contact and then separate. During the rubbing process, the atoms in the two materials interact, causing the transfer of electrons between them. In this case, the wool socks have a greater affinity for electrons compared to the nylon carpet. As a result, electrons from the socks are transferred to the carpet, leaving the socks with a positive charge and the carpet with a negative charge.

Sally, wearing the wool socks, experiences an accumulation of excess electrons on her feet, giving her a negative charge. This excess negative charge on her body can lead to static electricity-related phenomena, such as experiencing a shock when touching a metal object or seeing her hair stand on end when near certain surfaces.

It's important to note that the movement of electrons determines the charge distribution during the triboelectric effect. In this scenario, electrons move from the wool socks to the nylon carpet, resulting in Sally and her socks gaining a negative charge.

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Answer:

1/4

Explanation:

Total radiation energy depends on temperature, so \(E_A=E_B\)

Radius \(R_A=2R_B\)

so the surface area \(S_A=4 S_B\)

energy per unit area

\(\frac{E_A}{S_A}=\frac{1}{4}\frac{E_B}{S_B}\)

Option B

Explanation:

no distance was given only the acceleration due to the fact that it went up (10m/s/s)

s0 it is

0 m/s and 10m/s/s (option B)

Answer:

neutrons protons electrons

Explanation:

after the Big Bang, the universe was filled with neutrons, protons, electrons, anti-electrons, photons and neutrinos.

Answer:

I = 15,645. kg*m/s or 15,645 N*s

Explanation:

I = m(^v)

I = 1050kg((26.2m/s-11.3m/s)

I = 15,645. kg*m/s

Answer:

A. 278K

Explanation:

I look it up it and I used a conversion chart

The fifth torque (T₅ ) is the largest then the third torque (T₃), after the third torque, the second and fourth torque (T₂) and (T₄), then the smallest torque is (T₆).

In terms of physics, torque is a rotating or twisting force that propels an item around an axis. Understanding torque, which is comparable to force in linear motion, is essential for comprehending rotating motion.

The torque for the first side is:

T₁ = 2FL/4 = 0.5FL

The second and fourth torque are equal in magnitude,

(FL×0.5)(cos 45) = 0.354 FL

The third torque is:

T₃ = FL/2 = 0.5FL

The fifth torque is:

T₅ = 2FL

The sixth torque is zero in magnitude as it is parallel to the door.

Hence, The fifth torque (T₅ ) is the largest then the third torque (T₃), after the third torque, the second and fourth torque (T₂) and (T₄), then the smallest torque is (T₆).

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#Complete question is:

Question: Six Forces, Each Of Magnitude Either F Or 2F, Are Applied To A Door As Seen From Above In (Figure 1) . Rank In Order, From Largest To Smallest, The Six Torques?1 To?6 About The door. Rank From Largest To Smallest. To Rank Items As Equivalent, Overlap Them. ?

Six forces, each of magnitude either F or 2F, are applied to a door as seen above in (Figure 1) .

Rank in order, from largest to smallest, the six torques  1 to 6 about the door.