this is confusind so plzzz help me

Answer:

True

Explanation:

1 cycle every 5 sec is the same when you set up the ratio as 1/5

Hope this helps!! Have a great day!!      :)

As per the given values, and uncertainty of the speedometer the actual speed could be 61.33 km/h.

Uncertainty = 2.0 km/h

Measured value = 90 km/h

Calculating the Percent uncertainty -

= (Uncertainty / Measured value) x 100

= (2.0 / 90 ) x 100

= 2.22%

Now, assuming the speedometer has the same percent uncertainty at 60 km/h, this percent uncertainty can be used to determine the range of speeds.

Percent uncertainty = 2.22%

Measured value = 60 km/h

Calculating the range -

= (Percent uncertainty / 100) x Measured value

= (2.22% / 100) x 60

= 1.33

Calculating the Total speed -

= 60 + 1.33

= 61.33

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Complete Question:

If your speedometer has an uncertainty of 2.0 km/h at a speed of 90 km/h ,what is the percent uncertainty? (b) If it has the same percent uncertainty when it reads 60 km/h , what is the range of speeds you could be going?

Your body is pulling on the Earth with the same reaction force that the Earth is pulling on you.

The gravitational force, which is what pushes mass-containing objects toward one another. We frequently consider the pull of gravity from the Earth. Your body is kept on the ground by this force. However, all mass-bearing objects are pulled toward one another by gravity.

An action force with an opposite direction has an effect called a reaction force. These two forces—also referred to as action and reaction forces—are covered by Newton's third law of motion. According to Newton's third law, there is an equal and opposite reaction to every action.

The gravitational force that pulls a body toward the earth or another celestial body; it is equal to the mass times the acceleration due to local gravity.

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The ethologists definition of a genetically programmed action pattern is a sequence of responses that are innate and inherited in a species that occur in a stereotyped, predictable way in response to a particular stimulus.

In animal behavior, a genetically programmed action pattern is a series of behaviors that are predictable, organized, and innate. A response series that is programmed genetically is a characteristic behavior pattern that a particular animal species consistently exhibits. An animal's responses to environmental stimuli are largely genetically inherited and innate.These behavior patterns are characterized by their predictability, regularity, and specificity. They are consistently shown by animals of the same species in response to a particular environmental cue. In animals, this response is referred to as a fixed action pattern (FAP). It is a behavior that is innate and fixed in an organism's genotype.

An instinctual behavioural sequence that is highly stereotyped and species-specific is referred to as a fixed action pattern in ethology. The intrinsic releasing mechanism, a "hard-wired" neural network, is claimed to create fixed action patterns in response to a sign/key stimulus or releaser. A fixed action pattern runs to completion after being released.

Konrad Lorenz, who created the idea, is frequently linked to this phrase. Fixed action patterns include six properties, according to Lorenz. These traits describe stereotyped, complicated, species-specific, released, triggered, and experience-independent fixed action patterns.

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Answer:

Ice cube, molecules, melting, zero degrees, liquid, faster, temperature, 100 degrees, steam

Answer:

lol you got the answer just need points sorry

Explanation:

Answer:

The volume of the object is 3.5cm³

Answer:

Stars are very massive stellar objects, which means that they have a very intense force of gravity. This is the first of the forces entering this "war".

In addition to that, due to the force of gravity that drives the star to contract, the process known as fusion occurs (the union of atoms of one element that results in another element, hydrogen fuses in stars to produce helium). The fusion created in the high temperatures of the center of the star generates an enormous amount of energy (which causes the stars to shine) and a force going outward of the star counteracting gravity, this is the second force in the "war" .

In a stable star these two forces (gravity going inward and the pressure created by the fusion going outward ) are in balance, preventing the star from exploding or collapsing. But eventually the star exhausts its "fuel" (hydrogen atoms) to produce fusion within it (although stars also fuse helium and other heavier elements, but once the hydrogen is finished the star is near its end), which decreases the force outward from the star, making the force that wins this battle to be the force of gravity.

When the force of gravity wins, the star collapses on itself and from here, depending on the star's mass, several things can happen, such as the star becoming a white dwarf, a supernova, even a black hole.

The life cycle of stars may be boiled down into a tug of war, lasting billions of years, between two basic forces -

Stars are very massive stellar objects and remain the longest in the stage when it is burning Hydrogen into Helium.

Thus,

The life cycle of stars may be boiled down into a tug of war, lasting billions of years, between two basic forces -

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Answer:

Machines can reduce force but not work.

Work = force * distance

If a machine reduces the force input by a factor of two, say, then the distance traveled by the applied force must be doubled

One cannot get more work out of a machine than the work input to the machine.

Explanation:

Wavelength is the distance between two consecutive and equivalent points on a wave. Wavelength can be quantified by measuring the distance between two equivalent and consecutive points, such as the distance between two peaks or two troughs. The scientific symbol for wavelength is a Greek letter called lambda.

Answer:

in this ionic compound, oxygen has 2 excess electrons and magnesium has two electrons missing.

Explanation:

When oxygen is mixed in a chemical reaction, it acquires two electrons from magnesium, to become an ion with 2 negative .

Mg + O → MgO

Therefore, in this ionic compound, oxygen has 2 excess electrons and magnesium has two electrons missing

Answer:

B:0

F:1.33

Explanation:

velocity of B is 0 m/s

you can refer to the graph

acceleration of F =slope of F

4/3=1.33 m/s^2

The correct statement that explains the observation using Newton's laws is objects at rest tend to remain in their current state of motion unless acted upon by an unbalanced force, but objects in motion require a continual application of force to stay in motion. Here option A is correct.

According to Newton's first law of motion, an object will continue moving at a constant velocity in a straight line unless acted upon by an external force. In this case, when the cannonball is shot horizontally from the cannon, it initially possesses a forward velocity due to the force applied by the cannon. However, once the cannonball is in motion, the only forces acting on it are gravity and friction.

Gravity acts vertically downward, causing the cannonball to accelerate downward. Friction acts horizontally in the opposite direction to the motion of the cannonball. As the cannonball moves forward, friction opposes its motion and gradually slows it down.

Since there is no force continuously propelling the cannonball forward, and the forces of friction and gravity act on it, the cannonball eventually comes to a stop and falls to the ground. Hence option A is correct.

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The x-component of vector ~r is approximately -96.19 km, the y-component of vector ~r is approximately 91.19 km, and the direction of the final position vector ~r is approximately 136.8° west of north.

To solve this problem, we can break down the total displacement vector ~r into its x and y components and use the Pythagorean theorem and trigonometric functions to find the magnitude and direction of ~r.

First, we can find the x and y components of the displacement vector for each leg of the trip:

For the first leg, the x component is 96 km * cos(26°) ≈ 88.25 km and the y component is 96 km * sin(26°) ≈ 41.01 km.

For the second leg, the x component is -59.5 km * sin(32°) ≈ -31.44 km and the y component is 59.5 km * cos(32°) ≈ 50.18 km.

For the third leg, the x component is -153 km and the y component is 0 km.

Next, we can add up the x and y components to get the total displacement vector ~r:

The x component of ~r is 88.25 km - 31.44 km - 153 km = -96.19 km.

The y component of ~r is 41.01 km + 50.18 km + 0 km = 91.19 km.

Using the Pythagorean theorem, we can find the magnitude of ~r:

|~r| = sqrt((-96.19 km)^2 + (91.19 km)^2) ≈ 129.4 km

To find the direction of ~r, we can use the arctan function and take into account the signs of the x and y components:

The angle θ between ~r and the positive x-axis is arctan((y component)/(x component)) = arctan(-91.19 km/-96.19 km) ≈ 43.2°.

Since the displacement vector ends up west of the starting point, the direction of ~r is west of north, which means the angle is 180° - θ = 180° - 43.2° ≈ 136.8° west of north.

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Answer:

Thorium 227 (also known as Radioactinium)

The system's amplitude after 7.75 cycles is determined as 2.9 inches.

The system's amplitude after 7.75 cycles is calculated by applying the following equations as follows;

A ∝ √ n

where;

A = k√ n

A₁ /√n₁  = A₂/√n₂

A₂ = √n₂ x (A₁ /√n₁)

when the initial amplitude is 1.57 in, at 2.25 cycles, the amplitude of the wave after 7.75 cycles is calculated as;

A₂ = √7.75 x (1.57 /√2.25)

A₂ = 2.9 inches

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Answer:

1800 seconds

Explanation:

Given,

Distance ( d ) = 18 km

Velocity ( v ) = 10 m/s

To find : Time ( t ) = ?

Distance in km need to be converted to m.

1 km = 1000 m

18 km

= 18 x 1000

= 18000 m

So,

d = 18000 m

Formula : -

v = d / t

t = d / v

= 18000 / 10

t = 1800 seconds.

Therefore,

1800 seconds long, it will take to cover a distance of 18 km.

Your answer would 1800 seconds.

You're welcome ;)

Given:

Three types of materials A, B, and C are there.

The coefficient of absorption of A is 30 %, B is 47 %, and C is 62 %.

To find:

Which material would you recommend and why?

Explanation:

Soundproofing is usually achieved by using materials that absorbed or reduce sounds. The coefficient of absorption of a material refers to that material's ability to absorb sound. The higher the percentage of a material absorption coefficient, the better the material's ability to absorb sound.

Hence, the material with a 62 % absorption coefficient that is Sample C has the greatest ability of the three materials to absorb sound effectively.

B) Sample C, because the percentage of the energy in an incident wave that remains in a reflected wave from this material is the smallest.

Answer:

Given:

Three types of materials A, B, and C are there.

The coefficient of absorption of A is 30 %, B is 47 %, and C is 62 %.

To find:

Which material would you recommend and why?

Explanation:

Soundproofing is usually achieved by using materials that absorbed or reduce sounds. The coefficient of absorption of a material refers to that material's ability to absorb sound. The higher the percentage of a material absorption coefficient, the better the material's ability to absorb sound.

Hence, the material with a 62 % absorption coefficient that is Sample C has the greatest ability of the three materials to absorb sound effectively.

B) Sample C, because the percentage of the energy in an incident wave that remains in a reflected wave from this material is the small

When A landlord has eight 40watt electrical lighting bulb ,four 60watt bulb and two 100watt bulb. if he has all the points on for 5hours then  the bill for 30days is​ $17.10.

The energy consumption per bulb in kilowatt-hours (kWh) is given by,

Energy = Power × Time

For the 40-watt bulbs:

Energy = 40 W × 5 hours = 200 Wh = 0.2 kWh

For the 60-watt bulbs:

Energy = 60 W × 5 hours = 300 Wh = 0.3 kWh

For the 100-watt bulbs:

Energy = 100 W × 5 hours = 500 Wh = 0.5 kWh

the total energy consumption per day is,

Total Energy per Day = (8 × 0.2 kWh) + (4 × 0.3 kWh) + (2 × 0.5 kWh)

Total Energy per Day = 1.6 kWh + 1.2 kWh + 1 kWh = 3.8 kWh

The total energy consumption for the 30 days would be:

Total Energy per Month = Total Energy per Day × 30 days

Total Energy per Month = 3.8 kWh/day × 30 days = 114 kWh

Let's assume the cost per kWh is $0.15, then electricity bill is given by,

Electricity Bill = Total Energy per Month × Cost per kWh

Electricity Bill = 114 kWh × $0.15 = $17.10

Hence, the electricity bill for 30 days would amount to $17.10.

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Answer:

Explanation:

current=amount of charge/time taken

=40/5

=8 ampere(A)

The current flowing in the circuit is 8 A.

The correct answer to the question is Option B. 8 A.

Quantity of electricity, current and time are related by the following equation:

Q is the quality of electricity.

I is the current.

t is the time.

Quantity of electricity (Q) = 40 C

Time (t) = 5 s

Q = It

40 = I × 5

Divide both side by 5

I = 40 / 5

Thus, the current in the circuit is 8 A.

The correct answer to the question is Option B. 8 A

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Answer:

b

Explanation:

Answer:

f = 2445 Hz

Explanation:

i did the quiz

The frequency that the driver (observer) detects is equal to 1008 Hz

Given the following data:

To calculate the frequency that the driver (observer) detects, we would apply Doppler's effect of sound waves:

Mathematically, Doppler's effect of sound waves is given by the formula:

\(F_o = \frac{V \;+ \;V_o}{V\; - \;V_s} F\)

Where:

Substituting the given parameters into the formula, we have;

\(F_o = \frac{343 \;+ \;20}{343\; - \;20} \times 900\\\\F_o = \frac{363}{323} \times 900\\\\F_o = 1.12 \times 900\\\\F_o =1008 \;Hz\)

Driver (observer) frequency = 1008 Hz

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The system described by the transfer function G(s) = -co² s² + 2a + w², with a damping ratio of 1.3 and a natural frequency of 0.5, has an overdamped unit step response. So, the correct option is (E)

The transfer function of the system is given as G(s) = -co² s² + 2a + w², where co represents the damping ratio, a represents an arbitrary constant, and w represents the natural frequency of the system. We are given that the natural frequency is 0.5 and the damping ratio is 1.3.

To determine the type of unit step response, we need to analyze the damping ratio (co) in relation to the critical damping value (co_critical).

The critical damping ratio (co_critical) is defined as the value where the system is on the threshold between being overdamped and underdamped. It is given by the formula co_critical = 2 * sqrt(a * w²).

In our case, the natural frequency (w) is 0.5, so we can calculate co_critical as follows: co_critical = 2 * sqrt(a * 0.5²).

Since the damping ratio (co) is given as 1.3, we can compare it with co_critical to determine the type of unit step response.

If co > co_critical, the system is considered overdamped (Option E).

If co = co_critical, the system is considered critically damped (Option D).

If co < co_critical, the system is considered underdamped (Option C).

Based on the given values, we can determine that the system is overdamped (Option E) because the damping ratio (1.3) is greater than the critical damping ratio.

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The stated assertion states that r> Ra lengths from the conducting cylinder's axis.

We can determine an object's actual size by learning how far it is from us. The area that an object occupies in the sky can be measured. The distance to an object is then necessary to calculate its real size. An thing appears smaller the farther it is away.

Briefing:

The magnetic force is inversely correlated with the conducting cylinder's axis distance.

The strongest magnetic field Rb = 4.95 cm,

Most minimal gravitational flux = r>Ra

Rb = 4.95 cm

r= 5.40 cm

Ra =7.75 cm

r> Ra

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Women:

They were excluded due to social expectations, they were expected to take a female role that entailed learning domestic skills, getting married, having children.

Minorities:

They were excluded because of limited academic opportunities.

Women were excluded from psychology due to social expectations.

Minorities were excluded from psychology because of limited academic opportunities.

Psychology is the scientific study related to mind and behavior. Psychology involves the study of conscious and unconscious mind, including feelings and emotions.

Women were not allowed or accepted to refer to the Psychologist because they were considered to be always happy with the family and being busy with the house chores and take responsibility of all the family members.

Women were expected to take a female role that include learning domestic skills, getting married and having children.

For minority, they are not allowed to take hold of post or admission in academic institutions. They have very limited amount of opportunities in educational background.

Thus, the reasons are explained for the exemption of women and minority from psychology.

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The range of electronegativity for polar nonpolar and ionic bonding will be    between 1.5 and 2.1

Electronegativity is a chemical property that describes the tendency of an atom or a functional group to attract electrons toward itself.

The range of electronegativity for polar nonpolar and ionic bonding . So,  the difference in electronegativity is somewhere between 1.5 and 2.1, between a polar covalent bond and an ionic bond.

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The range of electronegativity for polar nonpolar and ionic bonding is less than 0.4 and greater that 0.4, respectively.

In general there are two major categories of bonds, which are polar molecules and nonpolar molecules.

In the field of chemistry, polarity can be described as the distribution of electric charge around atoms, chemical groups, or molecules.

There is no hard and fast rule but in general, a bond is considered as non polar if the difference in electronegativities is less than about 0.4, and it will be called a polar bond molecule if the difference is greater than 0.4.

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Answer:

The road surface is always rough, so the frictional force between the tires and the road surface make it difficult to maintain constant speed because acceleration always changes.

The correct answer is option C. Chemical.

A chemical reaction is a process in which chemical bonds between atoms are broken and reformed, resulting in the creation of new substances with different properties from the original ones. During a chemical reaction, the atoms of the reactant molecules rearrange themselves to form new products, which can have different physical and chemical properties than the original substances.

Chemical reactions can be classified into different types based on the nature of the reactants and the products formed. For instance, a synthesis reaction is a type of chemical reaction in which two or more substances combine to form a more complex compound, while a decomposition reaction is a reaction in which a compound is broken down into simpler substances.

Chemical reactions are fundamental to many natural and industrial processes, from the production of fuels and materials to the metabolism of living organisms. Understanding the mechanisms and properties of chemical reactions is crucial for many fields of science, including chemistry, biochemistry, and materials science.

In conclusion, a chemical reaction is a process in which substances change to other substances as chemical bonds break and reform. It is a fundamental concept in chemistry and has important applications in many scientific and industrial fields.

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The additional force needed to bring the car into equilibrium is equal to the mass of the car times the acceleration of the car, or F = ma.

Equilibrium is a state of balance and stability between opposing forces or actions. In economics, it refers to the point where the supply and demand for a given product or service are equal, and the market price of the product or service is stable. In physics and chemistry, equilibrium is a state in which different competing forces are balanced, so that no net change is observed. In biology, it is the ability of an organism to maintain a stable internal environment despite changes in external conditions. Ultimately, equilibrium is a state of balance, stability, and homeostasis.

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