The diagram shows a rectangular object acted on by three horizontal forces.
The resultant of these forces is:
A. 0 N
B. 20 N to the left
C. 20 N to the right
D. 40 N to the left

Answer:

Distance : 0.06533 meters or 65.33 mm

Explanation:

To solve this problem we can make the forces equal when the system is at equilibrium.

mass \(*\) gravity ( constant ) = spring constant

where l = the length at which the rubber band is stretched

0.2 kg \(*\) 9.8 m / s² = 30 N/m

1.96 kg \(*\) m / s² = 30 N/m

l = 1.96 kg \(*\) m / s² / 30 N/m = 0.06533 meters / 65.33 mm

The rubber band is stretched a distance of 0.06533 meters, or 65.33 mm.

Answer:

0.065

Explanation:

Apex i just got it right

Answer:

0.00025 kilometers

Explanation:

divide the length value by 1e+6

Answer:

250 mm = 0.00025 km.

Explanation:

250 mm equal 0.00025 km

Conversion details

To convert mm to km use the following formula:

1 mm equals 0.000001 km

So, to convert 250 mm to km, multiply 0.000001 by 250 i.e.,

250 mm = 0.000001 * 250 km = 0.00025 km

(hope this helps can i plz have brainlist :D hehe)

The required velocity of mass 100 kg is 3.75 m/s.

The required velocity of mass 100 kg is determined by applying the principle of conservation of linear momentum as follows;

This principle states that in an isolated or closed system, the sum of the initial momentum of an object is equal to the sum of the final momentum.

momentum of the 100 kg mass = momentum of 150 kg mass

100 kg x v = 150 kg x 2.5 m/s

v = ( 375 kg m/s ) / ( 100 kg )

v = 3.75 m/s

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The complete question is below:

A mass of 150 kg is moving 2.5 m/s. How fast would an object with a mass of 100kg need to be going to hit the previous mass head on and come to a complete stop?​

Answer:

7.2 seconds

Explanation:

50=5

72=t, criss-cross, t=72 (5)/50

The energy output is 714 Watts is loss.

According to the thermal conductivity equation, the rate of heat loss H is given by:

H=\swhere,

K is the heat conductivity coefficient.

A is for Area of Cross Section.

H = Heat loss rate

Temperature differential between the two sides of the body in the given situation: x-Thickness of the material 71 -1

T = 37°C, or body temperature, and 12°C, or room temperature

initial instance.

A=2m x=0.01 m

H=174watt

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An evacuation is a process that removes air and moisture from the A/C system. The level of moisture in the system can affect its performance and cause damage to its components. Therefore, evacuating the system is a crucial step in ensuring optimal A/C performance.

During the evacuation process, a vacuum pump is used to remove the air and moisture from the system. The length of time for the evacuation process and the level of vacuum pressure used can impact the amount of moisture removed. However, on average, it is estimated that about three percent of moisture is removed during the evacuation process.

In summary, during a typical evacuation of a mobile A/C system, about three percent of moisture is removed. This process is crucial in ensuring optimal A/C performance and protecting the system from potential damage.

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Displacement is a vector quantity. The position is at 5 m, his displacement is 12 m and his distance travelled is 28 m

Displacement can be defined as the distance travel by an object in a specific direction. It is a vector quantity.

Given that  at -7m a person walks in the negative direction for 8 m then turns around and walks 20m in the positive direction.

That is,

The displacement D = -7 - 8 + 20

D = 5 m

His final position will be at 5 m

What was his overall displacement will be 20 - 8 = 12 m

The total distance travel will be 20 + 8 = 28 m

Therefore, the person position, displacement and distance travelled are 5m, 12m, and 28m respectively.

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Answer:

well done buddy

Explanation:

Answer:

The ball hit with 12N

Explanation:

Just took the quiz and got it right

Answer:

Direct current

Explanation:

Because it cannot reverse, and it's optimum for usage by electric home appliances.

Unlike Alternating current which reverses, and can cause electric appliances to burn out.

Answer:

D) 1 & 2

Explanation:

Ice melting can be refrozen and although the pencil breaks, it doesn't change the chemical formula of the pencil

The wavelength of a 2.6 MHz ultrasound wave traveling through aluminum is 0.06 mm.

We know that the speed of sound in aluminum (v) is 6420 m/s. This value can be looked up in a table or provided in the question. The formula to find the wavelength of a wave is:

Wavelength (λ) = speed (v) / frequency (f)

where λ is measured in meters, v is measured in meters per second, and f is measured in hertz.

To use this formula, we need to convert the frequency of the ultrasound wave from megahertz (MHz) to hertz (Hz):

2.6 MHz = 2,600,000 Hz

Now we can plug in the values and solve:

λ = v / f

λ = 6420 m/s / 2,600,000 Hz

λ ≈ 0.00006 m or 0.06 mm (rounded to two decimal places)

Therefore, the wavelength of a 2.6 MHz ultrasound wave traveling through aluminum is 0.06 mm.

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Let's determine the type of waves that interact with each other to make nodes and antinodes when the string in a violin vibrates.

Sanding waves can be said to be a combination of two waves which move in opposite direction. Each of the waves have the same frequency and amplitude.

These waves interact with each other.

They are also called stationary waves.

They make nodes and antinodes which are found where the wave forms.

Therefore, when the string in a violin vibrates, the waves which interact with each other to form nodes and antinodes can be classified as standing waves.

ANSWER:

Standing waves.

Answer:

10 m/per second

Explanation:

he speeds up 10 m in a single second

A prime example of how culture has contributed to human survival is the development of agriculture, which helps feed enormous numbers of people. Option A is correct.

A population's collective ways of life are known as culture. The manner of life for an entire society has been said about culture. It encompasses manners, rituals, and artistic standards.

The invention of farming helps feed large populations of humans and is an example of how culture can help humans survive.

Hence option A is correct.

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Answer:

1.2 mph

Explanation:

14.4 ÷ 12 = 1.2

Answer: For a pull box housing shielded conductors carrying over 1000V and used in an angled pull, the distance between a conductor entry and exit must be 36 times the outside diameter.

Explanation: To find the correct explanation to the question, we have to find more about the pull box housing shielded conductors.

Thus, we can conclude that, for a pull box housing shielded conductors carrying over 1000V and used in an angled pull, the distance between a conductor entry and exit must be 36 times the outside diameter.

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The two cars will move with a velocity of 23m/s(optionB)

Linear momentum is the product of a system’s mass and its velocity. In equation form, linear momentum p is

p=mv.

Where m is the mass of the body and v is the velocity at which it moves.

The momentum of the first call = 2100× 25=52500kgm/s

The momentum of the second car = 1650×21= 34650kgm/s

The total momentum before collision = 52500+34650=87150kgm/s

momentum after collision= (2100+1650)v= 3750v

law of conservation of Linear momentum states that; momentum before collision = momentum after collision

Therefore 87150= 3750v

v = 87150/3750

v= 23m/s( nearest whole number)

Therefore the velocity of the two cars after collision is 23m/s.

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The area of the retina that contains a high density of photoreceptors and enables us to focus on a particular object is called the fovea centralis.

The fovea centralis is a small, specialized region located in the center of the macula, which is the central part of the retina.

It contains a high concentration of cone photoreceptor cells, which are responsible for detailed and color vision.

The fovea centralis is responsible for our sharpest and clearest vision, as it is densely packed with cones and has a direct line of sight to the object of focus.

When we want to see something with high acuity, we instinctively move our eyes so that the image falls on the fovea centralis, maximizing our visual perception.

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Answer:

Below

Explanation:

First find the velocity of the car :

     v = d / t

     v = 547 / 4.72

     v = 115.889830508 km / h

Covert to m/s by dividing by 3.6 :

     115.889830508 / 3.6 = 32.19161958555813 m/s

Now use d = vt

     d = (32.19161958555813)(6,000)

        = 193149.7175 m

Convert to km : 193.150 km

The car will travel 193.150 km in 100 minutes

Hope this helps! Best of luck <3

It takes 2 seconds for the charge to pass a point in the wire. The result is obtained by using the formula for an electric current equation.

Electric current is a flow of charged particles per unit of time. It can be expressed as

I = Q/t

Where

A light bulb has

Find the time taken!

We use the formula above to find t.

I = Q/t

0.835 = 1.67/t

t = 1.67/0.835

t = 2 s

Hence, the time needed to for the charge to pass a point in the wire is 2 seconds.

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Answer:

A : the colonists dumped tea in Boston Harbor

Answer:

if we ignore air resistance .. which might slow her down a lot towards the end of the 7 seconds.. but we will just ignore that for this question

Explanation:

then V=Vo+a*t

Vo=0

V=a*t

V=9.8(7)

V=68.6 m/s  just a little over 150 MPH.. but.. I think terminal velocity is close to 120... soo hmm maybe about that fast... but that with air resistance.. so this problem depends a lot on if you're going to ignore that

Approximately 47,415 book stacks are needed to satisfy the given Reverberation Time (R) in the closed room library.

To solve for the number of book stacks needed to satisfy the given Reverberation Time (R) in the closed room library, we will use the following formulas:

1. A₁ = (Number of Book Stacks) × (Maintenance Factor)

2. A, Ratio Stack = A, Stack with Books / A, Stack without Books

3. R₁ = 0.049 × (Volume of the room) / A

First, let's calculate the volume of the room:

Volume = floor area × height

Volume = π × (60 ft)^2 × 10 ft

Volume ≈ 113,097 ft³

Now, let's calculate the absorption coefficient for the different materials:

A, Stack without Books = 0.17

A, Stack with Books = 0.40

A, Ratio Stack = 0.40 / 0.17

A, Ratio Stack ≈ 2.35

Next, we can calculate the required absorption coefficient (A₁) using the reverberation time formula:

R₁ = 0.049 × Volume / A₁

Given that R₁ = 0.05 seconds, we can rearrange the formula to solve for A₁:

A₁ = 0.049 × Volume / R₁

A₁ ≈ 0.049 × 113,097 ft³ / 0.05 s

A₁ ≈ 111,288 ft²·s

Now, we can calculate the number of book stacks needed (Number of Book Stacks):

Number of Book Stacks = A₁ / (A, Ratio Stack)

Number of Book Stacks ≈ 111,288 ft²·s / 2.35

Number of Book Stacks ≈ 47,415

Therefore, approximately 47,415 book stacks are needed to satisfy the given Reverberation Time (R) in the closed room library.

To find the intensity in the decibel scale, we would need additional information such as the source power or sound pressure levels. The given information does not allow us to calculate the decibel scale intensity.

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Answer:

Kinetic energy is the energy of an object or a system's particles in motion. It is defined as the work needed to accelerate a body of a given mass from one velocity to another. Kinetic energy is the energy associated with motion, and can be calculated by multiplying half the mass of the object by the square of its velocity. Kinetic energy can be converted into other forms of energy, such as heat, sound, and light.

During phase shift, the substance's molecules' average kinetic energy remains constant.

Simply put, molecules move more quickly as kinetic energy rises. Nevertheless, molecules change phases when potential energy rises. The molecule changes phases as a result of an increase in potential energy.

In a phase change, matter moves from one state to another either by gaining energy through heat and entering a more energetic state, or by losing energy through heat and entering a state with lower energy.

The energy supplied during phase change is only used to separate the molecules; none of it is used to boost the kinetic energy of the molecules. Therefore, since the molecules' kinetic energy is constant, its temperature won't increase.

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Question:

1) A tourist accidentally drops a camera from a 50.0 m high bridge. What is the speed of the camera as it hits the water? *

Answer:

28.0 m/s